31 results on '"Haande, S"'
Search Results
2. Overvåking av Gjersjøen og Kolbotnvannet med tilløpsbekker 1972-2012. Med vekt på resultater fra 2012 - datarapport
- Author
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Haande, S., Hagman, C., Skogan, O., and Haande, S. - Project manager
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Gjersjøen ,eutrophication ,Matematikk og naturvitenskap: 400 [VDP] ,eutrofiering ,algeoppblomstring ,forurensningsovervåking ,pollution monitoring ,Akershus ,algal blooms ,lake Gjersjøen - Abstract
Denne rapporten presenterer detaljerte data fra undersøkelser i Gjersjøen og Kolbotnvannet med bekker i perioden 1972-2012 med vekt på 2012, i form av figurer, tabeller, litteratur og vedlegg som ikke er tatt med i sammendragsrapporten med samme navn. Oppegård kommune. Vann, avløp og renovasjon, virksomhet VAR
- Published
- 2013
3. Overvåking av Gjersjøen og Kolbotnvannet med tilløpsbekker 1972-2011 med vekt på viktige resultater fra 2011
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Haande, S., Hagman, C., Selvik, J., and Haande, S. - Project manager
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Matematikk og naturvitenskap: 400 [VDP] ,eutrofi ferskvann - Abstract
Oppegård kommune, Vann, avløp og
- Published
- 2012
4. Tilstandsklassifisering av vannforekomster i Vannområde Glomma Sør for Øyeren (2011) i henhold til vannforskriften
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Haande, S., Eriksen, T., Kile, M., Hagman, C., Borch, Håkon, Brænden, R., Arnesen, Jan Fredrik, Raudsandmoen, Lillian, and Haande, S. - Project manager
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ferskvann ,ecological status ,Matematikk og naturvitenskap: 400 [VDP] ,elver ,water framework directive ,lakes ,innsjøer ,vannforskriften ,økologisk tilstand ,rivers - Abstract
Denne rapporten inneholder en tilstandsklassifisering og vurdering av økologisk tilstand i 19 innsjøer og 63 elve- og bekkelokaliteter i Vannområde Glomma Sør for Øyeren. Klassifiseringen er gjort etter kriteriene som gis i vannforskriften og er basert på innsamlede, og noen tidligere innsamlede, biologiske, vannkjemiske- og fysiske parametere. I 2011 ble det gjennomført en omfattende prøvetaking av aktuelle biologiske kvalitetselementer og vannkjemiske parametere i de utvalgte vannforekomstene. I åtte innsjøer som er påvirket av forsuring ble det tatt prøver av bunndyr og pH. I 11 innsjøer som er påvirket av eutrofiering ble det tatt prøver av planteplankton, vannplanter og flere fysiske- og vannkjemiske parametere. I de 63 elve- og bekkelokalitetene som er påvirket av eutrofiering ble det tatt prøver av begroingsalger, bunndyr og utvalgte vannkjemiske parametere. Rapporten gir en grundig beskrivelse av metodene som er brukt for hvert kvalitetselement, samt en innføring i hvordan tilstandsklassifiseringen er gjennomført. Tilstandsklassifiseringen er gjort ut fra ”det verste styrer” prinsippet, slik at det kvalitetselementet som har dårligst tilstand blir utslagsgivende for totalresultatet for vannforekomsten. Resultatene er presentert i to hovedkapittel: 1) resultater for hvert kvalitetselement, både for innsjøer og for elver, og 2) «faktaark» for hver vannforekomst med en samlet tilstandsvurdering. Resultatene viser at de aller fleste vannforekomstene som har blitt tilstandsklassifisert er i moderat eller dårligere tilstandsklasse og at det må iverksettes tiltak for å nå miljømålet om god økologisk tilstand. Vannområde Glomma Sør for Øyeren
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- 2012
5. Overvåking av Gjersjøen og Kolbotnvannet med tilløpsbekker 1972-2011. Med vekt på resultater fra 2011 - datarapport
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Haande, S., Hagman, C., Selvik, J., and Haande, S. - Project manager
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vassdrag ,eutrophication ,Matematikk og naturvitenskap: 400 [VDP] ,eutrofiering ,algeoppblomstring ,forurensningsovervåking ,pollution monitoring ,algal blooms ,lake gjersjøen ,gjersjøen - Abstract
Denne rapporten presenterer detaljerte data fra undersøkelser i Gjersjøen og Kolbotnvannet med bekker i perioden 1972-2011 med vekt på 2011, i form av figurer, tabeller, litteratur og vedlegg som ikke er tatt med i sammendragsrapporten med samme navn. Oppegård kommune. Vann, avløp og renovasjon, virksomhet VAR
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- 2012
6. Overvåking av Gjersjøen og Kolbotnvannet med tilløpsbekker 1972-2009 med vekt på viktige resultater fra 2009
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Haande, S., Rohrlack, T., Hagman, C., Selvik, J., and Haande, S. - Project manager
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Matematikk og naturvitenskap: 400 [VDP] ,eutrofi ferskvann - Abstract
Oppegård kommune, Vann, avløp og
- Published
- 2011
7. Klassifisering av økologisk tilstand i elver og innsjøer i Vannområde Morsa iht. Vanndirektivet
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Haande, S., Solheim, A., Moe, J., Brænden, R., and Haande, S. - Project manager
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Matematikk og naturvitenskap: 400 [VDP] ,elver ,eutrofiering ,vanndirektivet ,water framework directive ,lakes ,innsjøer ,økologisk tilstand ,ecological sstatus ,rivers - Abstract
Denne rapporten inneholder en vurdering av økologisk tilstand i en rekke vannforekomster i Vannområde Morsa. Klassifiseringen er gjort etter Vanndirektivets kriterier og er basert på eksisterende biologiske og vannkjemiske data. Klassifiseringssystemet i Norge er fortsatt under utvikling, og tilstandsklassifisering er derfor foreløpig beheftet med en relativt stor usikkerhet. For innsjøer er klassifiseringen gjort ut fra tilgjengelige data for planteplankton (klorofyll a) og vannvegetasjon, samt total fosfor, mens for elver inngår begroingsalger, bunnfauna og fisk, samt total fosfor. Klassifiseringen er gjort ut fra ”det verste styrer” prinsippet, slik at det kvalitetselementet som har dårligst tilstand blir utslagsgivende for totalresultatet for vannforekomsten. Resultatene for både innsjøer og elver/bekker viser gjennomgående en forverring av tilstanden fra god økologisk tilstand øverst i Vannområdet til moderat/dårlig økologisk tilstand nedover i vassdraget og særlig i kystbekkene. Klorofyll a er det verste kvalitetselementet i sju av de ni innsjøene, mens vannplanter er utslagsgivende i to av innsjøene. I elve/bekkelokalitetene er begroingsalger det verste kvalitetselementet i 21 vannforekomster, bunnfauna det verste i 18 vannforekomster, mens fisk er det verste i seks av vannforekomstene. Vannområdeutvalget Morsa
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- 2011
8. Fagrådet for vann- og avløpsteknisk samarbeid i Indre Oslofjord
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Berge, J., Amundsen, Rita, Fredriksen, Lene, Bjerkeng, B., Gitmark, J., Holt, Tor Fredrik, Haande, S., Hylland, Ketil, Johnsen, T., Kroglund, T., Ledang, A., Lendering, Andrea, Lømsland, E., Rohrlack, Thomas, Sørensen, K., Wisbech, Cathrine, and Berge, J. - Project manager
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Matematikk og naturvitenskap: 400 [VDP] ,marine miljøgifter - Abstract
Rapporten gir en kort oversikt over resultatene fra overvåkingen foretatt for Fagrådet for vann- og avløpsteknisk samarbeid i Indre Oslofjord i 2012. En mer utfyllende presentasjon av resultatene er gitt i en vedleggsrapport (NIVA rapport l.nr.6534-2013). Undersøkelsene omfatter fysiske, kjemiske og biologiske forhold. Overvåkingen i 2012 ble gjennomført av NIVA i samarbeid med Universitetet i Oslo. Fagrådet for vann- og avløpsteknisk
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- 2013
9. Overvåking av Indre Oslofjord i 2012 - Vedleggsrapport
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Berge, J., Amundsen, R., Fredriksen, L., Bjerkeng, B., Gitmark, J., Holt, T.F., Haande, S., Hyllant, K., Johnsen, T., Kroglund, T., Ledang, A., Lenderink, A., Lømsland, E., Norli, M., Magnusson, J., Rohrlack, T., Sørensen, K., Wisbech, Cathrine, and Berge, J. - Project manager
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inner oslofjord ,Matematikk og naturvitenskap: 400 [VDP] ,hydrography ,indre oslofjord ,hydrografi/hydrokjemi ,forurensningsovervåking ,marine biology ,pollution monitoring ,marine miljøgifter ,marin biologi ,hydrochemistry - Abstract
Her presenteres data for overvåkingen av Indre Oslofjord i 2012. En mindre omfattende beskrivelse av resultatene er presentert i NIVA rapport nr. 6533. Undersøkelsene omfatter fysiske, kjemiske og biologiske forhold. Fjordens innelukkede karakter gjør at utslipp vil kunne medføre uønskede effekter (eutrofiering, miljøgifteffekter). Dette er påvirkninger som fremdeles er aktuelle fordi det ventes en betydelig befolkningsøkning i området med dertil følgende tilførsler. Kapasiteten på de kommunale renseanleggene er også i ferd med å bli sprengt. Vannutskiftningen i Indre Oslofjord var i 2012 svært lav. Innenfor Drøbak ble ca. 25 % av vannet mellom 20 meters dyp og bunn skiftet ut mot ca. 73 % i 2011. I Bunnefjorden var det ingen dypvannsfornyelse i 2012 og oksygenkonsentrasjonen sank mot sommeren, med litt sulfidutvikling på 150 m dyp frem til august. Vinteren 2012 var det en relativt god dypvannsfornyelse i Vestfjorden. Algemengden i overflatevannet var i 2012 nær gjennomsnittet for tidligere år. Forekomsten av reker var relativt god i Lysakerfjorden, men var lavere lengre utover i Vestfjorden. Horisontalutbredelsen av tang viste en positiv utvikling i Vestfjorden og Bunnefjorden, og negativ utvikling i sørlige deler av Vestfjorden og Drøbak-området. I 2011/12 ble det startet en registrering av fisk innsamlet med bunntrål ved Steilene i Indre Oslofjord. Resultatene tyder på en sesongavhengighet mht. tilstedeværende arter og deres antall. I august og november var fangstene dominert av øyepål som utgjorde 43-46 % av fangsten. Sypike og hvitting utgjorde hver ca. 15 %. I februar og juni var sypike, gapeflyndre (20-25 %) og sølvtorsk (20 %) mest dominerende. De fleste artene syntes likevel å være tilstede året rundt. Fangstene av torsk varierte mellom 2 og 5 %, og var på topp i november måned. Biomarkør resultater fra de siste ti årene antyder at det blir gradvis mindre effekter av miljøgifter på torsken i Indre Oslofjord. Fagrådet for vann- og avløpsteknisk samarbeid i Indre Oslofjord
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- 2013
10. Overvåking av Gjersjøen og Kolbotnvannet med tilløpsbekker 1972-2010. Med vekt på resultater fra 2010 - datarapport
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Haande, S., Rohrlack, T., Hagman, C., Selvik, J., and Rohrlack, T. - Project manager
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vassdrag ,eutrophication ,Matematikk og naturvitenskap: 400 [VDP] ,eutrofiering ,algeoppblomstring ,forurensningsovervåking ,pollution monitoring ,algal blooms ,lake gjersjøen ,gjersjøen - Abstract
Denne rapporten presenterer detaljerte data fra undersøkelser i Gjersjøen og Kolbotnvannet med bekker i perioden 1972-2010 med vekt på 2010, i form av figurer, tabeller, litteratur og vedlegg som ikke er tatt med i sammendragsrapporten med samme navn. Oppegård kommune. Vann, avløp, renovasjon
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- 2011
11. Overvåking av Gjersjøen og Kolbotnvannet med tilløpsbekker 1972-2009. Med vekt på resultater fra 2009 - datarapport
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Haande, S., Rohrlack, T., Hagman, C., and Norendal, T.
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vassdrag ,eutrophication ,Matematikk og naturvitenskap: 400 [VDP] ,eutrofiering ,algeoppblomstring ,forurensningsovervåking ,pollution monitoring ,algal blooms ,lake gjersjøen ,gjersjøen - Abstract
Oppegård Kommune. Vann, avløp og renovasjon, virksomhet VAR
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- 2010
12. Overvåking av Gjersjøen og Kolbotnvannet med tilløpsbekker 1972-2008 Med vekt på viktige resultater fra 2008
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Rohrlack, T., Haande, S., Becsan, I., Hagman, C., Norendal, T., and Rohrlack, T. - Project manager
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Matematikk og naturvitenskap: 400 [VDP] ,eutrofi ferskvann - Abstract
Oppegård kommune, Vann, avløp og
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- 2009
13. Overvåking av Gjersjøen og Kolbotnvannet med tilløpsbekker 1972-2008 Med vekt på resultater fra 2008 Datarapport
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Haande, S., Rohrlack, T., Hagman, C., Norendal, T., and Rohrlack, T. - Project manager
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vassdrag ,eutrophication ,Matematikk og naturvitenskap: 400 [VDP] ,eutrofiering ,algeoppblomstring ,forurensningsovervåking ,pollution monitoring ,algal blooms ,lake gjersjøen ,gjersjøen - Abstract
Denne rapporten presenterer detaljerte data fra undersøkelser i Gjersjøen og Kolbotnvannet med bekker i perioden 1972-2008 med vekt 2008, i form av figurer, tabeller, litteratur og vedlegg som ikke er tatt med i sammendragsrapporten med samme navn. Oppegård kommune. Vann, avløp og renovasjon, virksomhet VAR
- Published
- 2009
14. Overvåkning av Gjersjøen og Kolbotnvannet med tilløpsbekker 1972-2007. Med vekt på resultater fra 2007 - datarapport
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Haande, S., Rohrlack, T., Ptacnik, R., Løvik, J., Norendal, T., and Rohrlack, T. - Project manager
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vassdrag ,eutrophication ,Matematikk og naturvitenskap: 400 [VDP] ,eutrofiering ,algeoppblomstring ,pollution monitoring ,algal blooms ,forurensingsovervåkning ,lake gjersjøen ,gjersjøen - Abstract
Årsliste 2008 Denne rapporten presenterer detaljerte data fra undersøkelser i Gjersjøen og Kolbotnvannet med bekker i perioden 1972-2007 med vekt 2007, i form av figurer, tabeller, litteratur og vedlegg som ikke er tatt med i sammendragsrapporten med samme navn. Oppegård kommune. Vann, avløp og renovasjonsvirksomhet. VAR
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- 2008
15. Overvåking av Gjersjøen og Kolbotnvannet med tilløpsbekker 1972-2006 med vekt på viktige resultater fra 2006
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Oredalen, T., Haande, S., Løvik, J., Becsan, I., Ptacnik, R., Norendal, T., and Oredalen, T. - Project manager
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Matematikk og naturvitenskap: 400 [VDP] ,tilløpsbekker ,biomangfold og eutrofiering - ferskvann ,overvåking - Abstract
Årsliste 2007 Oppegård kommune
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- 2007
16. Overvåking av Gjersjøen og Kolbotnvannet med tilløpsbekker 1972-2006. Med vekt på resultater fra 2006 - datarapport
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Haande, S., Oredalen, T., Ptacnik, R., Løvik, J., Norendal, T., and Oredalen, T. - Project manager
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eutrophication ,Matematikk og naturvitenskap: 400 [VDP] ,eutrofiering ,biomangfold og eutrofiering - ferskvann ,algeoppblomstring ,forurensningsovervåking ,pollution monitoring ,algal blooms - Abstract
Årsliste 2007 Denne rapporten presenterer detaljerte data fra undersøkelser i Gjersjøen og Kolbotnvannet med bekker i perioden 1972-2006 med vekt 2006, i form av figurer, tabeller, litteratur og vedlegg som ikke er tatt med i sammendragsrapporten med samme navn. Oppegård kommune
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- 2007
17. Temperature effects explain continental scale distribution of cyanobacterial toxins
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Sigrid Haande, Christos Avagianos, Vítor Gonçalves, Lisette N. de Senerpont Domis, Carlos Rochera, Ana García-Murcia, Kerstin Häggqvist, Reyhan Akçaalan, Jordi Noguero-Ribes, Mariusz Pełechaty, Wojciech Krztoń, Hans-Peter Grossart, Jutta Fastner, Bárbara Úbeda, Wojciech Pęczuła, Nur Filiz, Justyna Kobos, Juan M. Soria, Elif Neyran Soylu, Lars-Anders Hansson, Filip Stević, Luděk Bláha, Hanna Mazur-Marzec, Jolanda M. H. Verspagen, Burçin Önem, Karl-Otto Rothhaupt, Nico Salmaso, Abdulkadir Yağcı, David Parreño Duque, Ksenija Savadova, Nusret Karakaya, Aleksandra Pełechata, Yvon Verstijnen, Carmen Pérez-Martínez, Pauliina Salmi, Gizem Bezirci, Tuğba Ongun Sevindik, Svetislav Krstić, Rahmi Uysal, Laura Seelen, Eloísa Ramos-Rodríguez, Spela Remec-Rekar, Sven Teurlincx, Monserrat Real, Meriç Albay, Donald C. Pierson, Susana Romo, Kristiina Mustonen, Kirsten Christoffersen, Valentini Maliaka, Estela Rodríguez-Pérez, Joanna Rosińska, Nilsun Demir, Mehmet Tahir Alp, Elvira Romans, João Morais, Daniel Szymański, Danielle Machado-Vieira, Damian Chmura, Evanthia Mantzouki, Teresa Vegas-Vilarrúbia, Antonio Picazo, Mikołaj Kokociński, Anastasia Hiskia, Christine Edwards, Yang Yang, Irma Vitonytė, Mehmet Cesur, Agnieszka Bańkowska-Sobczak, Iwona Kostrzewska-Szlakowska, Nikoletta Tsiarta, Anđelka Plenković-Moraj, Miquel Lürling, Ryszard Gołdyn, Kristel Panksep, Kemal Celik, Anna Kozak, Jose Luis Cereijo, Pablo Urrutia-Cordero, Petra M. Visser, Rodan Geriš, Uğur Işkın, Leonardo Cerasino, Kadir Çapkın, Victor C. Perello, Carmen Cillero-Castro, Arda Özen, Manel Leira, Enrique Moreno-Ostos, Şakir Çinar, Agnieszka Budzyńska, Faruk Maraşlıoğlu, Pedro M. Raposeiro, Theodoros M. Triantis, Agnieszka Pasztaleniec, Sevasti-Kiriaki Zervou, Elżbieta Wilk-Woźniak, Edward Walusiak, Kersti Kangro, Jorge Juan Montes-Pérez, Triantafyllos Kaloudis, Mari Carmen Trapote, Pablo Alcaraz-Párraga, José María Blanco, Marek Kruk, Hans W. Paerl, Lidia Nawrocka, Meryem Beklioglu, Antonio Camacho, Moritz Buck, Biel Obrador, Ilona Gagala, Lauri Arvola, Elżbieta Szeląg-Wasielewska, Petar Žutinić, Giovanna Flaim, Núria Catalán, R. Carballeira, Alinne Gurjão de Oliveira, Magdalena Frąk, Alo Laas, Magdalena Grabowska, Dubravka Špoljarić Maronić, Meral Apaydın Yağcı, Itana Bokan Vucelić, Ana Maria Antão-Geraldes, Tõnu Feldmann, Natalia Jakubowska-Krepska, Trine Perlt Warming, Armand Hernández, Anna C. Santamans, Fuat Bilgin, Cayelan C. Carey, Joana Mankiewicz-Boczek, Elísabeth Fernández-Morán, Mete Yilmaz, Iwona Jasser, Boris Aleksovski, Michał Wasilewicz, Agnieszka Ochocka, David García, Lea Tuvikene, Roberto L. Palomino, B.W. Ibelings, Hatice Tunca, Birger Skjelbred, Joan Gomà, Jūratė Karosienė, Maria G. Antoniou, Vitor Vasconcelos, Mehmet Ali Turan Koçer, Eti E. Levi, Markéta Fránková, Beata Madrecka, Barbara Pawlik-Skowrońska, Jeremy Fonvielle, Korhan Özkan, Maciej Karpowicz, Özden Fakioglu, Lucia Chomova, Magdalena Toporowska, Ülkü Nihan Tavşanoğlu, Jūratė Kasperovičienė, Latife Köker, Kinga Kwasizur, Koray Ozhan, Valeriano Rodríguez, William Colom-Montero, Ulrike Obertegger, Micaela Vale, Spyros Gkelis, Michał Niedźwiecki, Tunay Karan, Piotr Domek, Judita Koreivienė, Andrea G. Bravo, Justyna Sieńska, Jessica Richardson, Hana Nemova, Cafer Bulut, Jordi Delgado-Martín, Tanja Žuna Pfeiffer, Marija Gligora Udovič, Manthos Panou, Dietmar Straile, Rafael Marcé, Valerie McCarthy, Iveta Drastichova, Agnieszka Napiórkowska-Krzebietke, J. A. Gálvez, Tina Elersek, Beata Messyasz, Adriano Boscaini, Carmen Ferriol, Julita Dunalska, Freshwater and Marine Ecology (IBED, FNWI), BAİBÜ, Mühendislik Fakültesi, Çevre Mühendisliği Bölümü, Karakaya, Nusret, Universitat de Barcelona, Fakülteler, Fen - Edebiyat Fakültesi, Biyoloji Bölümü, Soylu, Elif Neyran, European Cooperation in Science and Technology, Université de Genève, Tokat Gaziosmanpaşa Üniversitesi, Lammi Biological Station, Doctoral Programme in Atmospheric Sciences, CIIMAR - Centro Interdisciplinar de Investigação Marinha e Ambiental, Yılmaz, Mete, Institute of Agricultural and Environmental Sciences, Mantzouki, Evanthia, Ibelings, Bastiaan Willem, Mantzouki, E, Lurling, M, Fastner, J, Domis, LD, Wilk-Wozniak, E, Koreiviene, J, Seelen, L, Teurlincx, S, Verstijnen, Y, Krzton, W, Walusiak, E, Karosiene, J, Kasperoviciene, J, Savadova, K, Vitonyte, I, Cillero-Castro, C, Budzynska, A, Goldyn, R, Kozak, A, Rosinska, J, Szelag-Wasielewska, E, Domek, P, Jakubowska-Krepska, N, Kwasizur, K, Messyasz, B, Pelechata, A, Pelechaty, M, Kokocinski, M, Garcia-Murcia, A, Real, M, Romans, E, Noguero-Ribes, J, Duque, DP, Fernandez-Moran, E, Karakaya, N, Haggqvist, K, Demir, N, Beklioglu, M, Filiz, N, Levi, EE, Iskin, U, Bezirci, G, Tavsanoglu, UN, Ozhan, K, Gkelis, S, Panou, M, Fakioglu, O, Avagianos, C, Kaloudis, T, Celik, K, Yilmaz, M, Marce, R, Catalan, N, Bravo, AG, Buck, M, Colom-Montero, W, Mustonen, K, Pierson, D, Yang, Y, Raposeiro, PM, Goncalves, V, Antoniou, MG, Tsiarta, N, McCarthy, V, Perello, VC, Feldmann, T, Laas, A, Panksep, K, Tuvikene, L, Gagala, I, Mankiewicz-Boczek, J, Yagci, MA, Cinar, S, Capkin, K, Yagci, A, Cesur, M, Bilgin, F, Bulut, C, Uysal, R, Obertegger, U, Boscaini, A, Flaim, G, Salmaso, N, Cerasino, L, Richardson, J, Visser, PM, Verspagen, JMH, Karan, T, Soylu, EN, Maraslioglu, F, Napiorkowska-Krzebietke, A, Ochocka, A, Pasztaleniec, A, Antao-Geraldes, AM, Vasconcelos, V, Morais, J, Vale, M, Koker, L, Akcaalan, R, Albay, M, Maronic, DS, Stevic, F, Pfeiffer, TZ, Fonvielle, J, Straile, D, Rothhaupt, KO, Hansson, LA, Urrutia-Cordero, P, Blaha, L, Geris, R, Frankova, M, Kocer, MAT, Alp, MT, Remec-Rekar, S, Elersek, T, Triantis, T, Zervou, SK, Hiskia, A, Haande, S, Skjelbred, B, Madrecka, B, Nemova, H, Drastichova, I, Chomova, L, Edwards, C, Sevindik, TO, Tunca, H, Onem, B, Aleksovski, B, Krstic, S, Vucelic, IB, Nawrocka, L, Salmi, P, Machado-Vieira, D, de Oliveira, AG, Delgado-Martin, J, Garcia, D, Cereijo, JL, Goma, J, Trapote, MC, Vegas-Vilarrubia, T, Obrador, B, Grabowska, M, Karpowicz, M, Chmura, D, Ubeda, B, Galvez, JA, Ozen, A, Christoffersen, KS, Warming, TP, Kobos, J, Mazur-Marzec, H, Perez-Martinez, C, Ramos-Rodriguez, E, Arvola, L, Alcaraz-Parraga, P, Toporowska, M, Pawlik-Skowronska, B, Niedzwiecki, M, Peczula, W, Leira, M, Hernandez, A, Moreno-Ostos, E, Blanco, JM, Rodriguez, V, Montes-Perez, JJ, Palomino, RL, Rodriguez-Perez, E, Carballeira, R, Camacho, A, Picazo, A, Rochera, C, Santamans, AC, Ferriol, C, Romo, S, Soria, JM, Dunalska, J, Sienska, J, Szymanski, D, Kruk, M, Kostrzewska-Szlakowska, I, Jasser, I, Zutinic, P, Udovic, MG, Plenkovic-Moraj, A, Frak, M, Bankowska-Sobczak, A, Wasilewicz, M, Ozkan, K, Maliaka, V, Kangro, K, Grossart, HP, Paerl, HW, Carey, CC, Ibelings, BW, Sakarya Üniversitesi/Fen-Edebiyat Fakültesi/Biyoloji Bölümü, Ongun Sevindik, Tuğba, Tunca, Hatice, Hitit Üniversitesi, Fen Edebiyat Fakültesi, Biyoloji Bölümü, and Fen Edebiyat Fakültesi
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light climate ,0106 biological sciences ,thermocline ,Bacterial toxins ,toksiinit ,limit of quantitation ,Toxines bacterianes ,Microcystin-LR ,Toxicology ,01 natural sciences ,Anatoxin-a ,analogs and derivatives ,BLOOMS ,Direct Effects ,uracil ,Water Pollutants ,chemistry.chemical_classification ,Temperatures ,FRESH-WATER ,latitude ,maximum buoyancy frequency ,6. Clean water ,climate change ,Indirect effects ,EUTROPHICATION ,microcystin RR ,articles ,GROWTH ,lämpötila ,LAKES ,microcystin ,anatoxin ,cylindrospermopsin ,temperature ,direct effects ,indirect effects ,spatial distribution ,European Multi Lake Survey ,epilimnetic temperature ,ta1172 ,cyanobacteria, lakes, climate warming, microcystin ,Zoology ,Article ,water pollutant ,MICROCYSTIS-AERUGINOSA ,Alkaloids ,Settore BIO/07 - ECOLOGIA ,NATURAL SCIENCES. Biology ,Spatial distribution ,Microcystis aeruginosa ,Uracil ,lake ,syanobakteerit ,Indirect Effects ,liquid chromatography-mass spectrometry ,1172 Environmental sciences ,Ekologi ,nutrient ,010604 marine biology & hydrobiology ,lcsh:R ,microbiology ,Climatic changes ,microcystin LR ,Anatoxin ,Lakes ,Spatial Distribution ,chemistry ,nodularin ,microbial diversity ,phytoplankton ,ta1181 ,Cylindrospermopsin ,Tropanes ,Cyanobacteria ,Aquatic Ecology and Water Quality Management ,analysis ,Health, Toxicology and Mutagenesis ,lcsh:Medicine ,environmental parameters ,010501 environmental sciences ,medicine.disease_cause ,nitrogen ,chemistry.chemical_compound ,sea surface temperature ,environmental factor ,ddc:550 ,Canvi climàtic ,phosphorus ,PRIRODNE ZNANOSTI. Biologija ,limit of detection ,Ecology ,Cyanobacteria Toxins ,biology ,Temperature ,levinneisyys ,Nodularin ,tropane derivative ,Europe ,DAPHNIA-MAGNA ,İndirect Effects ,Direct effects ,microbial community ,Environmental Monitoring ,high performance liquid chromatography ,Microcystins ,Climate Change ,Bacterial Toxins ,Microcystin ,välittömät oikeusvaikutukset ,cyanobacterium ,ddc:570 ,geographic distribution ,medicine ,bacterial toxin ,controlled study ,ddc:610 ,Institut für Biochemie und Biologie ,0105 earth and related environmental sciences ,nonhuman ,WIMEK ,Toxin ,longitude ,PHYTOPLANKTON ASSEMBLAGES ,Aquatic Ecology ,NITROGEN AVAILABILITY ,anatoxin a ,Aquatische Ecologie en Waterkwaliteitsbeheer ,biology.organism_classification ,Climatic change ,CLIMATE ,13. Climate action ,response variable ,Canvis climàtics - Abstract
Insight into how environmental change determines the production and distribution of cyanobacterial toxins is necessary for risk assessment. Management guidelines currently focus on hepatotoxins (microcystins). Increasing attention is given to other classes, such as neurotoxins (e.g., anatoxin-a) and cytotoxins (e.g., cylindrospermopsin) due to their potency. Most studies examine the relationship between individual toxin variants and environmental factors, such as nutrients, temperature and light. In summer 2015, we collected samples across Europe to investigate the effect of nutrient and temperature gradients on the variability of toxin production at a continental scale. Direct and indirect effects of temperature were the main drivers of the spatial distribution in the toxins produced by the cyanobacterial community, the toxin concentrations and toxin quota. Generalized linear models showed that a Toxin Diversity Index (TDI) increased with latitude, while it decreased with water stability. Increases in TDI were explained through a significant increase in toxin variants such as MC-YR, anatoxin and cylindrospermopsin, accompanied by a decreasing presence of MC-LR. While global warming continues, the direct and indirect effects of increased lake temperatures will drive changes in the distribution of cyanobacterial toxins in Europe, potentially promoting selection of a few highly toxic species or strains. © 2018 by the authors. Licensee MDPI, Basel, Switzerland., The authors acknowledge COST Action ES 1105 “CYANOCOST—Cyanobacterial blooms and toxins in water resources: Occurrence impacts and management” and COST Action ES 1201 “NETLAKE—Networking Lake Observatories in Europe” for contributing to this study through networking and knowledge sharing with European experts in the field. Evanthia Mantzouki was supported by a grant from the Swiss State Secretariat for Education, Research and Innovation (SERI) to Bas Ibelings and by supplementary funding from the University of Geneva. We thank Clare Ahnlund, Ena Suarez and Irene Gallego for helping out with the Swiss survey. We thank Wendy Beekman and Els J. Faassen for the nutrient and toxin analysis.
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- 2018
18. Data Descriptor: A European Multi Lake Survey dataset of environmental variables, phytoplankton pigments and cyanotoxins
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Tunca, Hatice, Mantzouki, E, Campbell, J, van Loon, E, Visser, P, Konstantinou, I, Antoniou, M, Giuliani, G, Machado-Vieira, D, de Oliveira, AG, Maronic, DS, Stevic, F, Pfeiffer, TZ, Vucelic, IB, Zutinic, P, Udovic, MG, Plenkovic-Moraj, A, Tsiarta, N, Blaha, L, Geris, R, Frankova, M, Christoffersen, KS, Warming, TP, Feldmann, T, Laas, A, Panksep, K, Tuvikene, L, Kangro, K, Haggqvist, K, Salmi, P, Arvola, L, Fastner, J, Straile, D, Rothhaupt, KO, Fonvielle, J, Grossart, HP, Avagianos, C, Kaloudis, T, Triantis, T, Zervou, SK, Hiskia, A, Gkelis, S, Panou, M, McCarthy, V, Perello, VC, Obertegger, U, Boscaini, A, Flaim, G, Salmaso, N, Cerasino, L, Koreiviene, J, Karosiene, J, Kasperoviciene, J, Savadova, K, Vitonyte, I, Haande, S, Skjelbred, B, Grabowska, M, Karpowicz, M, Chmura, D, Nawrocka, L, Kobos, J, Mazur-Marzec, H, Alcaraz-Parraga, P, Wilk-Wozniak, E, Krzton, W, Walusiak, E, Gagala, I, Mankiewicz-Boczek, J, Toporowska, M, Pawlik-Skowronska, B, Niedzwiecki, M, Peczula, W, Napiorkowska-Krzebietke, A, Dunalska, J, Sienska, J, Szymanski, D, Kruk, M, Budzynska, A, Goldyn, R, Kozak, A, Rosinska, J, Szelag-Wasielewska, E, Domek, P, Jakubowska-Krepska, N, Kwasizur, K, Messyasz, B, Pelechata, A, Pelechaty, M, Kokocinski, M, Madrecka, B, Kostrzewska-Szlakowska, I, Frak, M, Bankowska-Sobczak, A, Wasilewicz, M, Ochocka, A, Pasztaleniec, A, Jasser, I, Antao-Geraldes, AM, Leira, M, Hernandez, A, Vasconcelos, V, Morais, J, Vale, M, Raposeiro, PM, Goncalves, V, Aleksovski, B, Krstic, S, Nemova, H, Drastichova, I, Chomova, L, Remec-Rekar, S, Elersek, T, Delgado-Martin, J, Garcia, D, Cereijo, JL, Goma, J, Trapote, MC, Vegas-Vilarrubia, T, Obrador, B, Garcia-Murcia, A, Real, M, Romans, E, Noguero-Ribes, J, Duque, DP, Fernandez-Moran, E, Ubeda, B, Galvez, JA, Marce, R, Catalan, N, Perez-Martinez, C, Ramos-Rodriguez, E, Cillero-Castro, C, Moreno-Ostos, E, Blanco, JM, Rodriguez, V, Montes-Perez, JJ, Palomino, RL, Rodriguez-Perez, E, Carballeira, R, Camacho, A, Picazo, A, Rochera, C, Santamans, AC, Ferriol, C, Romo, S, Soria, JM, Hansson, LA, Urrutia-Cordero, P, Ozen, A, Bravo, AG, Buck, M, Colom-Montero, W, Mustonen, K, Pierson, D, Yang, Y, Verspagen, JMH, Domis, LND, Seelen, L, Teurlincx, S, Verstijnen, Y, Lurling, M, Maliaka, V, Faassen, EJ, Latour, D, Carey, CC, Paerl, HW, Torokne, A, Karan, T, Demir, N, Beklioglu, M, Filiz, N, Levi, EE, Iskin, U, Bezirci, G, Tavsanoglu, UN, Celik, K, Ozhan, K, Karakaya, N, Kocer, MAT, Yilmaz, M, Maraslioglu, F, Fakioglu, O, Soylu, EN, Yagci, MA, Cinar, S, Capkin, K, Yagci, A, Cesur, M, Bilgin, F, Bulut, C, Uysal, R, Koker, L, Akcaalan, R, Albay, M, Alp, MT, Ozkan, K, Sevindik, TO, Tunca, H, Onem, B, Richardson, J, Edwards, C, Bergkemper, V, O'Leary, S, Beirne, E, Cromie, H, Ibelings, BW, Sakarya Üniversitesi/Fen-Edebiyat Fakültesi/Biyoloji Bölümü, and Tunca, Hatice
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Science & Technology - Other Topics - Abstract
Under ongoing climate change and increasing anthropogenic activity, which continuously challenge ecosystem resilience, an in-depth understanding of ecological processes is urgently needed. Lakes, as providers of numerous ecosystem services, face multiple stressors that threaten their functioning. Harmful cyanobacterial blooms are a persistent problem resulting from nutrient pollution and climate-change induced stressors, like poor transparency, increased water temperature and enhanced stratification. Consistency in data collection and analysis methods is necessary to achieve fully comparable datasets and for statistical validity, avoiding issues linked to disparate data sources. The European Multi Lake Survey (EMLS) in summer 2015 was an initiative among scientists from 27 countries to collect and analyse lake physical, chemical and biological variables in a fully standardized manner. This database includes in-situ lake variables along with nutrient, pigment and cyanotoxin data of 369 lakes in Europe, which were centrally analysed in dedicated laboratories. Publishing the EMLS methods and dataset might inspire similar initiatives to study across large geographic areas that will contribute to better understanding lake responses in a changing environment.
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- 2018
19. Microcystin profiles in European noble crayfish Astacus astacus and water in Lake Steinsfjorden, Norway.
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Miles CO, Strand DA, Rusch JC, Ballot A, Haande S, Løvberg KLE, Vrålstad T, and Samdal IA
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- Animals, Astacoidea, Water, Microcystins analysis, Norway, Lakes microbiology, Cyanobacteria
- Abstract
Lake Steinsfjorden, an important noble crayfish (Astacus astacus) habitat, is often affected by blooms of Planktothrix spp. that produce microcystins (MCs). A poor correlation between MCs by ELISA in the water and in crayfish tissue in a study in 2015 prompted further investigation by LC-HRMS. LC-HRMS analyses of filters from water samples and on selected crayfish tissue extracts from the 2015 study revealed the presence of known and previously unreported MCs. Crayfish samples from May and June 2015 were dominated by MCs from the Planktothrix bloom, whereas in September novel MCs that appeared to be metabolites of MC-LR were dominant, even though neither these nor MC-LR were detected in the water in 2015. A water sample from October 2016 also showed MCs typical of Planktothrix (i.e., [d-Asp
3 ]- and [d-Asp3 ,Dhb7 ]MC-RR and -LR), but low levels of MC-RR and MC-LR were detected in the lake water for the first time. In late summer and autumn, the MC profiles of crayfish were dominated by the homonorvaline (Hnv) variant MC-LHnv, a putative metabolite of MC-LR. Taken together, ELISA, LC-HRMS and previous PCR analyses showed that although Planktothrix was part of the crayfish diet, it was not the sole source of MCs in the crayfish. Possibly, crayfish in Lake Steinsfjorden may be ingesting MCs from benthic cyanobacteria or from contaminated prey. Therefore, information on the cyanobacterial or MC content in the water column cannot safely be used to make predictions about MC concentrations in the crayfish in Lake Steinsfjorden. Interestingly, the results also show that targeted LC-MS analysis of the crayfish would at times have underestimated their MC content by nearly an order of magnitude, even if all previously reported MC variants had been included in the analysis., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 The Authors. Published by Elsevier Inc. All rights reserved.)- Published
- 2024
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20. Lake browning counteracts cyanobacteria responses to nutrients: Evidence from phytoplankton dynamics in large enclosure experiments and comprehensive observational data.
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Lyche Solheim A, Gundersen H, Mischke U, Skjelbred B, Nejstgaard JC, Guislain ALN, Sperfeld E, Giling DP, Haande S, Ballot A, Moe SJ, Stephan S, Walles TJW, Jechow A, Minguez L, Ganzert L, Hornick T, Hansson TH, Stratmann CN, Järvinen M, Drakare S, Carvalho L, Grossart HP, Gessner MO, and Berger SA
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- Lakes microbiology, Humic Substances, Eutrophication, Nutrients, Phosphorus analysis, China, Phytoplankton, Cyanobacteria
- Abstract
Lakes worldwide are affected by multiple stressors, including climate change. This includes massive loading of both nutrients and humic substances to lakes during extreme weather events, which also may disrupt thermal stratification. Since multi-stressor effects vary widely in space and time, their combined ecological impacts remain difficult to predict. Therefore, we combined two consecutive large enclosure experiments with a comprehensive time-series and a broad-scale field survey to unravel the combined effects of storm-induced lake browning, nutrient enrichment and deep mixing on phytoplankton communities, focusing particularly on potentially toxic cyanobacterial blooms. The experimental results revealed that browning counteracted the stimulating effect of nutrients on phytoplankton and caused a shift from phototrophic cyanobacteria and chlorophytes to mixotrophic cryptophytes. Light limitation by browning was identified as the likely mechanism underlying this response. Deep-mixing increased microcystin concentrations in clear nutrient-enriched enclosures, caused by upwelling of a metalimnetic Planktothrix rubescens population. Monitoring data from a 25-year time-series of a eutrophic lake and from 588 northern European lakes corroborate the experimental results: Browning suppresses cyanobacteria in terms of both biovolume and proportion of the total phytoplankton biovolume. Both the experimental and observational results indicated a lower total phosphorus threshold for cyanobacterial bloom development in clearwater lakes (10-20 μg P L
-1 ) than in humic lakes (20-30 μg P L-1 ). This finding provides management guidance for lakes receiving more nutrients and humic substances due to more frequent extreme weather events., (© 2023 The Authors. Global Change Biology published by John Wiley & Sons Ltd.)- Published
- 2024
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21. Microcystins in European Noble Crayfish Astacus astacus in Lake Steinsfjorden, a Planktothrix -Dominated Lake.
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Samdal IA, Strand DA, Ballot A, Rusch JC, Haande S, Løvberg KLE, Miles CO, and Vrålstad T
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- Animals, Astacoidea metabolism, Body Burden, Environmental Monitoring, Food Chain, Humans, No-Observed-Adverse-Effect Level, Norway, Planktothrix genetics, Risk Assessment, Time Factors, Tissue Distribution, Astacoidea microbiology, Food Microbiology, Fresh Water microbiology, Harmful Algal Bloom, Lakes microbiology, Microcystins metabolism, Planktothrix metabolism, Shellfish microbiology, Water Microbiology
- Abstract
Lake Steinsfjorden, an important Norwegian location for noble crayfish ( Astacus astacus ), is often affected by cyanobacterial blooms caused by microcystin (MC)-producing Planktothrix spp. The impact of MCs on noble crayfish as a food source and crayfish health is largely unknown. We investigated the quantities and correlations of MCs in noble crayfish and lake water during and after a cyanobacterial bloom peaking in June-July 2015. Noble crayfish and water samples were collected monthly from June to October 2015 and in October 2016. The content of MCs was analysed by ELISA from tail muscle, intestine, stomach and hepatopancreas. PCR analysis for Planktothrix gene markers was performed on crayfish stomach content. Water samples were analysed for phytoplankton composition, biomass and MCs. PCR-positive stomach contents indicated Planktothrix to be part of the noble crayfish diet. Concentrations of MCs were highest in the hepatopancreas, stomach and intestine, peaking in August-September. Tail muscle contained low concentrations of MCs. Similar levels of MCs were found in crayfish from 2016. Except in September 2015, a normal portion of boiled noble crayfish tails was below the tolerable daily intake (TDI) for MCs for humans. Removing the intestine more than halved the content of MCs and seems a reasonable precautionary measure for noble crayfish consumers.
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- 2020
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22. A European Multi Lake Survey dataset of environmental variables, phytoplankton pigments and cyanotoxins.
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Mantzouki E, Campbell J, van Loon E, Visser P, Konstantinou I, Antoniou M, Giuliani G, Machado-Vieira D, Gurjão de Oliveira A, Maronić DŠ, Stević F, Pfeiffer TŽ, Vucelić IB, Žutinić P, Udovič MG, Plenković-Moraj A, Tsiarta N, Bláha L, Geriš R, Fránková M, Christoffersen KS, Warming TP, Feldmann T, Laas A, Panksep K, Tuvikene L, Kangro K, Häggqvist K, Salmi P, Arvola L, Fastner J, Straile D, Rothhaupt KO, Fonvielle J, Grossart HP, Avagianos C, Kaloudis T, Triantis T, Zervou SK, Hiskia A, Gkelis S, Panou M, McCarthy V, Perello VC, Obertegger U, Boscaini A, Flaim G, Salmaso N, Cerasino L, Koreivienė J, Karosienė J, Kasperovičienė J, Savadova K, Vitonytė I, Haande S, Skjelbred B, Grabowska M, Karpowicz M, Chmura D, Nawrocka L, Kobos J, Mazur-Marzec H, Alcaraz-Párraga P, Wilk-Woźniak E, Krztoń W, Walusiak E, Gagala I, Mankiewicz-Boczek J, Toporowska M, Pawlik-Skowronska B, Niedźwiecki M, Pęczuła W, Napiórkowska-Krzebietke A, Dunalska J, Sieńska J, Szymański D, Kruk M, Budzyńska A, Goldyn R, Kozak A, Rosińska J, Szeląg-Wasielewska E, Domek P, Jakubowska-Krepska N, Kwasizur K, Messyasz B, Pełechata A, Pełechaty M, Kokocinski M, Madrecka B, Kostrzewska-Szlakowska I, Frąk M, Bańkowska-Sobczak A, Wasilewicz M, Ochocka A, Pasztaleniec A, Jasser I, Antão-Geraldes AM, Leira M, Hernández A, Vasconcelos V, Morais J, Vale M, Raposeiro PM, Gonçalves V, Aleksovski B, Krstić S, Nemova H, Drastichova I, Chomova L, Remec-Rekar S, Elersek T, Delgado-Martín J, García D, Cereijo JL, Gomà J, Trapote MC, Vegas-Vilarrúbia T, Obrador B, García-Murcia A, Real M, Romans E, Noguero-Ribes J, Duque DP, Fernández-Morán E, Úbeda B, Gálvez JÁ, Marcé R, Catalán N, Pérez-Martínez C, Ramos-Rodríguez E, Cillero-Castro C, Moreno-Ostos E, Blanco JM, Rodríguez V, Montes-Pérez JJ, Palomino RL, Rodríguez-Pérez E, Carballeira R, Camacho A, Picazo A, Rochera C, Santamans AC, Ferriol C, Romo S, Soria JM, Hansson LA, Urrutia-Cordero P, Özen A, Bravo AG, Buck M, Colom-Montero W, Mustonen K, Pierson D, Yang Y, M H Verspagen J, de Senerpont Domis LN, Seelen L, Teurlincx S, Verstijnen Y, Lürling M, Maliaka V, Faassen EJ, Latour D, Carey CC, W Paerl H, Torokne A, Karan T, Demir N, Beklioğlu M, Filiz N, E Levi E, Iskin U, Bezirci G, Tavşanoğlu ÜN, Çelik K, Özhan K, Karakaya N, Koçer MAT, Yilmaz M, Maraşlıoğlu F, Fakioglu Ö, Soylu EN, Yağcı MA, Çınar Ş, Çapkın K, Yağcı A, Cesur M, Bilgin F, Bulut C, Uysal R, Köker L, Akçaalan R, Albay M, Alp MT, Özkan K, Sevindik TO, Tunca H, Önem B, Richardson J, Edwards C, Bergkemper V, O'Leary S, Beirne E, Cromie H, and Ibelings BW
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- Climate Change, Europe, Phytoplankton chemistry, Pigments, Biological, Cyanobacteria chemistry, Environmental Monitoring, Lakes
- Abstract
Under ongoing climate change and increasing anthropogenic activity, which continuously challenge ecosystem resilience, an in-depth understanding of ecological processes is urgently needed. Lakes, as providers of numerous ecosystem services, face multiple stressors that threaten their functioning. Harmful cyanobacterial blooms are a persistent problem resulting from nutrient pollution and climate-change induced stressors, like poor transparency, increased water temperature and enhanced stratification. Consistency in data collection and analysis methods is necessary to achieve fully comparable datasets and for statistical validity, avoiding issues linked to disparate data sources. The European Multi Lake Survey (EMLS) in summer 2015 was an initiative among scientists from 27 countries to collect and analyse lake physical, chemical and biological variables in a fully standardized manner. This database includes in-situ lake variables along with nutrient, pigment and cyanotoxin data of 369 lakes in Europe, which were centrally analysed in dedicated laboratories. Publishing the EMLS methods and dataset might inspire similar initiatives to study across large geographic areas that will contribute to better understanding lake responses in a changing environment.
- Published
- 2018
- Full Text
- View/download PDF
23. Simulating water quality and ecological status of Lake Vansjø, Norway, under land-use and climate change by linking process-oriented models with a Bayesian network.
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Couture RM, Moe SJ, Lin Y, Kaste Ø, Haande S, and Lyche Solheim A
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- Bayes Theorem, Cyanobacteria, Norway, Phytoplankton, Climate Change, Eutrophication, Lakes analysis, Models, Theoretical, Water Quality
- Abstract
Excess nutrient inputs and climate change are two of multiple stressors affecting many lakes worldwide. Lake Vansjø in southern Norway is one such eutrophic lake impacted by blooms of toxic blue-green algae (cyanobacteria), and classified as moderate ecological status under the EU Water Framework Directive. Future climate change may exacerbate the situation. Here we use a set of chained models (global climate model, hydrological model, catchment phosphorus (P) model, lake model, Bayesian Network) to assess the possible future ecological status of the lake, given the set of climate scenarios and storylines common to the EU project MARS (Managing Aquatic Ecosystems and Water Resources under Multiple Stress). The model simulations indicate that climate change alone will increase precipitation and runoff, and give higher P fluxes to the lake, but cause little increase in phytoplankton biomass or changes in ecological status. For the storylines of future management and land-use, however, the model results indicate that both the phytoplankton biomass and the lake ecological status can be positively or negatively affected. Our results also show the value in predicting a biological indicator of lake ecological status, in this case, cyanobacteria biomass with a BN model. For all scenarios, cyanobacteria contribute to worsening the status assessed by phytoplankton, compared to using chlorophyll-a alone., (Copyright © 2017 The Authors. Published by Elsevier B.V. All rights reserved.)
- Published
- 2018
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24. Temperature Effects Explain Continental Scale Distribution of Cyanobacterial Toxins.
- Author
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Mantzouki E, Lürling M, Fastner J, de Senerpont Domis L, Wilk-Woźniak E, Koreivienė J, Seelen L, Teurlincx S, Verstijnen Y, Krztoń W, Walusiak E, Karosienė J, Kasperovičienė J, Savadova K, Vitonytė I, Cillero-Castro C, Budzyńska A, Goldyn R, Kozak A, Rosińska J, Szeląg-Wasielewska E, Domek P, Jakubowska-Krepska N, Kwasizur K, Messyasz B, Pełechaty A, Pełechaty M, Kokocinski M, García-Murcia A, Real M, Romans E, Noguero-Ribes J, Duque DP, Fernández-Morán E, Karakaya N, Häggqvist K, Demir N, Beklioğlu M, Filiz N, Levi EE, Iskin U, Bezirci G, Tavşanoğlu ÜN, Özhan K, Gkelis S, Panou M, Fakioglu Ö, Avagianos C, Kaloudis T, Çelik K, Yilmaz M, Marcé R, Catalán N, Bravo AG, Buck M, Colom-Montero W, Mustonen K, Pierson D, Yang Y, Raposeiro PM, Gonçalves V, Antoniou MG, Tsiarta N, McCarthy V, Perello VC, Feldmann T, Laas A, Panksep K, Tuvikene L, Gagala I, Mankiewicz-Boczek J, Yağcı MA, Çınar Ş, Çapkın K, Yağcı A, Cesur M, Bilgin F, Bulut C, Uysal R, Obertegger U, Boscaini A, Flaim G, Salmaso N, Cerasino L, Richardson J, Visser PM, Verspagen JMH, Karan T, Soylu EN, Maraşlıoğlu F, Napiórkowska-Krzebietke A, Ochocka A, Pasztaleniec A, Antão-Geraldes AM, Vasconcelos V, Morais J, Vale M, Köker L, Akçaalan R, Albay M, Špoljarić Maronić D, Stević F, Žuna Pfeiffer T, Fonvielle J, Straile D, Rothhaupt KO, Hansson LA, Urrutia-Cordero P, Bláha L, Geriš R, Fránková M, Koçer MAT, Alp MT, Remec-Rekar S, Elersek T, Triantis T, Zervou SK, Hiskia A, Haande S, Skjelbred B, Madrecka B, Nemova H, Drastichova I, Chomova L, Edwards C, Sevindik TO, Tunca H, Önem B, Aleksovski B, Krstić S, Vucelić IB, Nawrocka L, Salmi P, Machado-Vieira D, de Oliveira AG, Delgado-Martín J, García D, Cereijo JL, Gomà J, Trapote MC, Vegas-Vilarrúbia T, Obrador B, Grabowska M, Karpowicz M, Chmura D, Úbeda B, Gálvez JÁ, Özen A, Christoffersen KS, Warming TP, Kobos J, Mazur-Marzec H, Pérez-Martínez C, Ramos-Rodríguez E, Arvola L, Alcaraz-Párraga P, Toporowska M, Pawlik-Skowronska B, Niedźwiecki M, Pęczuła W, Leira M, Hernández A, Moreno-Ostos E, Blanco JM, Rodríguez V, Montes-Pérez JJ, Palomino RL, Rodríguez-Pérez E, Carballeira R, Camacho A, Picazo A, Rochera C, Santamans AC, Ferriol C, Romo S, Soria JM, Dunalska J, Sieńska J, Szymański D, Kruk M, Kostrzewska-Szlakowska I, Jasser I, Žutinić P, Gligora Udovič M, Plenković-Moraj A, Frąk M, Bańkowska-Sobczak A, Wasilewicz M, Özkan K, Maliaka V, Kangro K, Grossart HP, Paerl HW, Carey CC, and Ibelings BW
- Subjects
- Alkaloids, Climate Change, Cyanobacteria Toxins, Environmental Monitoring, Europe, Temperature, Uracil analysis, Bacterial Toxins analysis, Cyanobacteria, Lakes microbiology, Microcystins analysis, Tropanes analysis, Uracil analogs & derivatives, Water Pollutants analysis
- Abstract
Insight into how environmental change determines the production and distribution of cyanobacterial toxins is necessary for risk assessment. Management guidelines currently focus on hepatotoxins (microcystins). Increasing attention is given to other classes, such as neurotoxins (e.g., anatoxin-a) and cytotoxins (e.g., cylindrospermopsin) due to their potency. Most studies examine the relationship between individual toxin variants and environmental factors, such as nutrients, temperature and light. In summer 2015, we collected samples across Europe to investigate the effect of nutrient and temperature gradients on the variability of toxin production at a continental scale. Direct and indirect effects of temperature were the main drivers of the spatial distribution in the toxins produced by the cyanobacterial community, the toxin concentrations and toxin quota. Generalized linear models showed that a Toxin Diversity Index (TDI) increased with latitude, while it decreased with water stability. Increases in TDI were explained through a significant increase in toxin variants such as MC-YR, anatoxin and cylindrospermopsin, accompanied by a decreasing presence of MC-LR. While global warming continues, the direct and indirect effects of increased lake temperatures will drive changes in the distribution of cyanobacterial toxins in Europe, potentially promoting selection of a few highly toxic species or strains., Competing Interests: The authors declare no conflict of interest.
- Published
- 2018
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25. Environmental Conditions Determine the Course and Outcome of Phytoplankton Chytridiomycosis.
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Rohrlack T, Haande S, Molversmyr Å, and Kyle M
- Subjects
- Evolution, Molecular, Genotype, Lakes parasitology, Light, Phytoplankton genetics, Temperature, Chytridiomycota physiology, Environment, Host-Parasite Interactions, Phytoplankton parasitology
- Abstract
Chytrid fungi are highly potent parasites of phytoplankton. They are thought to force phytoplankton organisms into an evolutionary arms race with high population diversity as the outcome. The underlying selection regime is known as Red Queen dynamics. However, our study suggests a more complex picture for chytrid parasitism in the cyanobacterium Planktothrix. Laboratory experiments identified a "cold thermal refuge", inside which Planktothrix can grow without chytrid infection. A field study in two Norwegian lakes underlined the ecological significance of this finding. The study utilized sediment DNA as a biological archive in combination with existing monitoring data. In one lake, temperature and light conditions forced Planktothrix outside the thermal refuge for most of the growing season. This probably resulted in Red Queen dynamics as suggested by a high parasitic pressure exerted by chytrids, an increase in Planktothrix genotype diversity over time, and a correlation between Planktothrix genotype diversity and duration of bloom events. In the second lake, a colder climate allowed Planktothrix to largely stay inside the thermal refuge. The parasitic pressure exerted by chytrids and Planktothrix genotype diversity remained low, indicating that Planktothrix successfully evaded the Red Queen dynamics. Episodic Planktothrix blooms were observed during spring and autumn circulation, in the metalimnion or under the ice. Interestingly, both lakes were dominated by the same or related Planktothrix genotypes. Taken together, our data suggest that, depending on environmental conditions, chytrid parasitism can impose distinct selection regimes on conspecific phytoplankton populations with similar genotype composition, causing these populations to behave and perhaps to evolve differently.
- Published
- 2015
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26. Spectrophotometric Analysis of Pigments: A Critical Assessment of a High-Throughput Method for Analysis of Algal Pigment Mixtures by Spectral Deconvolution.
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Thrane JE, Kyle M, Striebel M, Haande S, Grung M, Rohrlack T, and Andersen T
- Subjects
- Algorithms, Microalgae chemistry, Spectrophotometry methods, High-Throughput Screening Assays methods, Pigments, Biological chemistry, Plant Extracts chemistry
- Abstract
The Gauss-peak spectra (GPS) method represents individual pigment spectra as weighted sums of Gaussian functions, and uses these to model absorbance spectra of phytoplankton pigment mixtures. We here present several improvements for this type of methodology, including adaptation to plate reader technology and efficient model fitting by open source software. We use a one-step modeling of both pigment absorption and background attenuation with non-negative least squares, following a one-time instrument-specific calibration. The fitted background is shown to be higher than a solvent blank, with features reflecting contributions from both scatter and non-pigment absorption. We assessed pigment aliasing due to absorption spectra similarity by Monte Carlo simulation, and used this information to select a robust set of identifiable pigments that are also expected to be common in natural samples. To test the method's performance, we analyzed absorbance spectra of pigment extracts from sediment cores, 75 natural lake samples, and four phytoplankton cultures, and compared the estimated pigment concentrations with concentrations obtained using high performance liquid chromatography (HPLC). The deviance between observed and fitted spectra was generally very low, indicating that measured spectra could successfully be reconstructed as weighted sums of pigment and background components. Concentrations of total chlorophylls and total carotenoids could accurately be estimated for both sediment and lake samples, but individual pigment concentrations (especially carotenoids) proved difficult to resolve due to similarity between their absorbance spectra. In general, our modified-GPS method provides an improvement of the GPS method that is a fast, inexpensive, and high-throughput alternative for screening of pigment composition in samples of phytoplankton material.
- Published
- 2015
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27. The Red Queen race between parasitic chytrids and their host, Planktothrix: a test using a time series reconstructed from sediment DNA.
- Author
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Kyle M, Haande S, Ostermaier V, and Rohrlack T
- Subjects
- Animals, Environmental Monitoring, Host-Pathogen Interactions genetics, Lakes microbiology, Norway, Polymerase Chain Reaction, Time Factors, Biological Evolution, Chytridiomycota genetics, DNA, Fungal genetics, Geologic Sediments microbiology, Parasites genetics, Phytoplankton microbiology
- Abstract
Parasitic chytrid fungi (phylum Chytridiomycota) are known to infect specific phytoplankton, including the filamentous cyanobacterium Planktothrix. Subspecies, or chemotypes of Planktothrix can be identified by the presence of characteristic oligopeptides. Some of these oligopeptides can be associated with important health concerns due to their potential for toxin production. However, the relationship between chytrid parasite and Planktothrix host is not clearly understood and more research is needed. To test the parasite-host relationship over time, we used a sediment core extracted from a Norwegian lake known to contain both multiple Planktothrix chemotype hosts and their parasitic chytrid. Sediment DNA of chytrids and Planktothrix was amplified and a 35-year coexistence was found. It is important to understand how these two antagonistic species can coexistence in a lake. Reconstruction of the time series showed that between 1979-1990 at least 2 strains of Planktothrix were present and parasitic pressure exerted by chytrids was low. After this period one chemotype became dominant and yet showed continued low susceptibility to chytrid parasitism. Either environmental conditions or intrinsic characteristics of Planktothrix could have been responsible for this continued dominance. One possible explanation could be found in the shift of Planktothrix to the metalimnion, an environment that typically consists of low light and decreased temperatures. Planktothrix are capable of growth under these conditions while the chytrid parasites are constrained. Another potential explanation could be due to the differences between cellular oligopeptide variations found between Planktothrix chemotypes. These oligopeptides can function as defense systems against chytrids. Our findings suggest that chytrid driven diversity was not maintained over time, but that the combination of environmental constraints and multiple oligopeptide production to combat chytrids could have allowed one Planktothrix chemotype to have dominance despite chytrid presence.
- Published
- 2015
- Full Text
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28. LC-MS analysis with thiol derivatization to differentiate [Dhb(7)]- from [Mdha(7)]-microcystins: analysis of cyanobacterial blooms, Planktothrix cultures and European crayfish from Lake Steinsfjorden, Norway.
- Author
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Miles CO, Sandvik M, Haande S, Nonga H, and Ballot A
- Subjects
- Animals, Kinetics, Lakes, Microcystins classification, Norway, Astacoidea chemistry, Chromatography, Liquid methods, Cyanobacteria chemistry, Mass Spectrometry methods, Microcystins chemistry, Sulfhydryl Compounds chemistry
- Abstract
Kinetic studies showed that [Asp(3), Dhb(7)]MC-RR reacted with mercaptoethanol hundreds of times more slowly than MC-RR and a range of other [Mdha(7)]-containing microcystin congeners. The difference in reaction rate was sufficiently large that derivatization of microcystin-containing samples with mercaptoethanol, followed by LC-MS analysis, clearly discriminated between microcystins containing the isobaric [Dhb(7)]- and [Mdha(7)]-groups. Application of this approach, using LC-MS with both-ion trap and triple-quadrupole mass spectrometers, to water samples and Planktothrix cultures from Lake Steinsfjorden, Norway, demonstrated the presence of [Asp(3), Dhb(7)]MC-RR (5), [Asp(3)]MC-RY (14), and [Asp(3)]MC-LY (16), as well as analogues tentatively identified as [Asp(3)]MC-RR (4), [Asp(3), DMAdda(5), Dhb(7)]MC-LR (6), [Asp(3), Dhb(7)]MC-HtyR (8), [Asp(3)]MC-HtyR (9), [Asp(3), Dhb(7)]MC-LR (10), [Asp(3)]MC-LR (11), [Asp(3), Dhb(7)]MC-RY (15), and [Asp(3), Dhb(7)]MC-LY (17), together with low levels of several other analogues. This is the first use of this thiol-based LC-MS approach to identify Dhb-containing microcystins, and allowed identification of LC-MS peaks in a mixture of [Mdha(7)]- and [Dhb(7)]-congeners of [Asp(3)]MC-RR (4, 5), -RY (14, 15), and -LY (16, 17) in the samples from L. Steinsfjorden. This is also the first report of MC-RY-congeners outside of Africa, or in Planktothrix spp. Analysis of European crayfish (Astacus astacus) taken from L. Steinsfjorden revealed the presence of only trace levels of microcystins in the edible parts.
- Published
- 2013
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29. The impact of cyanobacteria on growth and death of opportunistic pathogenic bacteria.
- Author
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Bomo AM, Tryland I, Haande S, Hagman CH, and Utkilen H
- Subjects
- Bacteria pathogenicity, Colony Count, Microbial, Bacteria growth & development, Cyanobacteria physiology
- Abstract
Climate change may cause increased microbial growth in water sources and more knowledge is required on how this may affect the hygienic water quality, i.e., whether increased occurrence of cyanobacteria and algae may stimulate the growth rate of opportunistic pathogenic bacteria. Laboratory experiments were performed to investigate if the presence of the cyanobacteria Anabanea lemmermannii and Microcystis aeruginosa affected the survival and growth rate of the opportunistic pathogenic bacteria Aeromonas hydrophila and Pseudomonas aeruginosa, and the faecal indicators Escherichia coli and coliforms. Cyanobacteria were cultured in bottles containing the nutrient-poor medium 02. Sewage, A. hydrophila or P. aeruginosa was added to cyanobacterial cultures and the bacterial growth and survival was followed. E. coli and coliforms from sewage died within few days and the decay rate was not affected by the presence of cyanobacteria. The presence of Anabaena stimulated the growth rate of P. aeruginosa, but had no effect on the growth rate of A. hydrophila. Microcystis had no effect on the growth rate of P. aeruginosa and an inhibiting effect on the growth rate of A. hydrophila.
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- 2011
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30. Morphological and phylogenetic analysis of Anabaenopsis abijatae and Anabaenopsis elenkinii (nostocales, cyanobacteria) from tropical inland water bodies.
- Author
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Ballot A, Dadheech PK, Haande S, and Krienitz L
- Subjects
- Cyanobacteria cytology, Cyanobacteria genetics, DNA, Bacterial genetics, DNA, Ribosomal Spacer genetics, Genes, Bacterial, Genes, rRNA, RNA, Ribosomal, 16S genetics, Tropical Climate, Cyanobacteria classification, Phylogeny, Water Microbiology
- Abstract
Anabaenopsis spp. are heterocytous cyanobacteria commonly found in tropical, subtropical, and temperate water bodies. So far, the knowledge about the phylogeny of this genus is poor. Therefore, we have isolated 15 Anabaenopsis spp. strains from Kenyan and Mexican alkaline and saline water bodies and from a Ugandan freshwater body and studied the morphology and phylogeny in a polyphasic approach. Morphologically, the investigated strains could be discriminated in two groups. One group was containing six Anabaenopsis abijatae and A. cf. abijatae strains with up to more than 500 vegetative cells in one filament, mostly single intercalary heterocyte formation, and the ability to branch out. The other group comprised nine strains of Anabaenopsis elenkinii with short filaments with up to 38 vegetative cells, intercalary heterocytes in pairs, and no ability to branch out. The morphological differences were reflected in the two distinct clusters, which were found in the phylogenetic trees of 16S rDNA and PC-IGS. While the high 16S rDNA similarity values > 97.5% found between all investigated A. abijatae and A. elenkinii strains support the assignment of these two species to one single genus, the morphological differences and the low similarity values (< 87.3) found in PC-IGS sequences between the two clusters indicate two separate genera. A close morphological and phylogenetic relationship was found for A. abijatae and Anabaenopsis (Cyanospira) rippkae.
- Published
- 2008
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31. Diversity of Microcystis aeruginosa isolates (Chroococcales, Cyanobacteria) from East-African water bodies.
- Author
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Haande S, Ballot A, Rohrlack T, Fastner J, Wiedner C, and Edvardsen B
- Subjects
- Biodiversity, DNA, Ribosomal Spacer genetics, Enzyme-Linked Immunosorbent Assay, Genetic Variation, Kenya, Microcystins analysis, Microcystis classification, Microcystis metabolism, Molecular Sequence Data, Oligopeptides analysis, Sequence Analysis, DNA, Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization, Uganda, Fresh Water microbiology, Microcystis genetics, Phylogeny
- Abstract
With exception of South Africa, very little is known about the presence and abundance of toxic cyanobacteria and cyanobacterial blooms on the African continent. The close proximity between society and nature, and the use of the sparse water resources as drinking water in large parts of Africa, lead to the recognition that more knowledge on toxic cyanobacterial blooms is of major importance. The bloom forming cyanobacterium Microcystis aeruginosa is known to produce cyclic heptatoxins (microcystins) which can be toxic to humans. In this study the morphological, genetic, and chemical characters of 24 strains of M. aeruginosa from several water bodies in Kenya and Uganda, some of them used as drinking water sources, were examined. The M. aeruginosa strains possessed different levels of diversity depending on characterisation method. Four morphotypes were identified based on the traditional morphological approach, 10 genotypes by DNA sequence comparison of the PC-IGS and ITS1 rDNA regions, and 10 chemotypes based on MALDI-TOF-MS oligopeptide analysis. Only 4 of the 24 isolated strains from East Africa were found to produce microcystins, while oligopeptides belonging to the aeruginosin and cyanopeptolin class were detected in most strains.
- Published
- 2007
- Full Text
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