161 results on '"Henschel, Joh"'
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2. The brown locust refocussed - Knowns, unknowns and the relevance of Locustana pardalina (Walker) to Karoo ecosystems and rangeland management
- Author
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Henschel, Joh R., Duncan, Frances D., du Toit, Justin C.O., Milton, Suzanne J., and van der Merwe, Helga
- Published
- 2023
- Full Text
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3. Where birds are rare or fill the air: Documenting Karoo complexity: Richard Dean (10 August 1940—3 August 2022)
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Henschel, Joh R., Milton, Suzanne J., and Seymour, Colleen L.
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- 2023
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4. Coexistence of Ammoxenus (Gnaphosidae) spider species on and between termitaria of Microhodotermes viator (Hodotermitidae) at a Karoo site
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Henschel, Joh, primary, Dean, W. Richard J., additional, Milton, Suzanne J., additional, and Dippenaar-Schoeman, Ansie S., additional
- Published
- 2023
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5. Early stage litter decomposition across biomes
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Caliman, Adriano, Paquette, Alain, Gutiérrez-Girón, Alba, Humber, Alberto, Valdecantos, Alejandro, Petraglia, Alessandro, Alexander, Heather, Augustaitis, Algirdas, Saillard, Amélie, Fernández, Ana Carolina Ruiz, Sousa, Ana I., Lillebø, Ana I., da Rocha Gripp, Anderson, Francez, André-Jean, Fischer, Andrea, Bohner, Andreas, Malyshev, Andrey, Andrić, Andrijana, Smith, Andy, Stanisci, Angela, Seres, Anikó, Schmidt, Anja, Avila, Anna, Probst, Anne, Ouin, Annie, Khuroo, Anzar A., Verstraeten, Arne, Palabral-Aguilera, Arely N., Stefanski, Artur, Gaxiola, Aurora, Muys, Bart, Bosman, Bernard, Ahrends, Bernd, Parker, Bill, Sattler, Birgit, Yang, Bo, Juráni, Bohdan, Erschbamer, Brigitta, Ortiz, Carmen Eugenia Rodriguez, Christiansen, Casper T., Carol Adair, E., Meredieu, Céline, Mony, Cendrine, Nock, Charles A., Chen, Chi-Ling, Wang, Chiao-Ping, Baum, Christel, Rixen, Christian, Delire, Christine, Piscart, Christophe, Andrews, Christopher, Rebmann, Corinna, Branquinho, Cristina, Polyanskaya, Dana, Delgado, David Fuentes, Wundram, Dirk, Radeideh, Diyaa, Ordóñez-Regil, Eduardo, Crawford, Edward, Preda, Elena, Tropina, Elena, Groner, Elli, Lucot, Eric, Hornung, Erzsébet, Gacia, Esperança, Lévesque, Esther, Benedito, Evanilde, Davydov, Evgeny A., Ampoorter, Evy, Bolzan, Fabio Padilha, Varela, Felipe, Kristöfel, Ferdinand, Maestre, Fernando T., Maunoury-Danger, Florence, Hofhansl, Florian, Kitz, Florian, Sutter, Flurin, Cuesta, Francisco, de Almeida Lobo, Francisco, de Souza, Franco Leandro, Berninger, Frank, Zehetner, Franz, Wohlfahrt, Georg, Vourlitis, George, Carreño-Rocabado, Geovana, Arena, Gina, Pinha, Gisele Daiane, González, Grizelle, Canut, Guylaine, Lee, Hanna, Verbeeck, Hans, Auge, Harald, Pauli, Harald, Nacro, Hassan Bismarck, Bahamonde, Héctor A., Feldhaar, Heike, Jäger, Heinke, Serrano, Helena C., Verheyden, Hélène, Bruelheide, Helge, Meesenburg, Henning, Jungkunst, Hermann, Jactel, Hervé, Shibata, Hideaki, Kurokawa, Hiroko, Rosas, Hugo López, Rojas Villalobos, Hugo L., Yesilonis, Ian, Melece, Inara, Van Halder, Inge, Quirós, Inmaculada García, Makelele, Isaac, Senou, Issaka, Fekete, István, Mihal, Ivan, Ostonen, Ivika, Borovská, Jana, Roales, Javier, Shoqeir, Jawad, Lata, Jean-Christophe, Theurillat, Jean-Paul, Probst, Jean-Luc, Zimmerman, Jess, Vijayanathan, Jeyanny, Tang, Jianwu, Thompson, Jill, Doležal, Jiří, Sanchez-Cabeza, Joan-Albert, Merlet, Joël, Henschel, Joh, Neirynck, Johan, Knops, Johannes, Loehr, John, von Oppen, Jonathan, Þorláksdóttir, Jónína Sigríður, Löffler, Jörg, Cardoso-Mohedano, José-Gilberto, Benito-Alonso, José-Luis, Torezan, Jose Marcelo, Morina, Joseph C., Jiménez, Juan J., Quinde, Juan Dario, Alatalo, Juha, Seeber, Julia, Stadler, Jutta, Kriiska, Kaie, Coulibaly, Kalifa, Fukuzawa, Karibu, Szlavecz, Katalin, Gerhátová, Katarína, Lajtha, Kate, Käppeler, Kathrin, Jennings, Katie A., Tielbörger, Katja, Hoshizaki, Kazuhiko, Green, Ken, Yé, Lambiénou, Pazianoto, Laryssa Helena Ribeiro, Dienstbach, Laura, Williams, Laura, Yahdjian, Laura, Brigham, Laurel M., van den Brink, Liesbeth, Rustad, Lindsey, Zhang, Lipeng, Morillas, Lourdes, Xiankai, Lu, Carneiro, Luciana Silva, Di Martino, Luciano, Villar, Luis, Bader, Maaike Y., Morley, Madison, Lebouvier, Marc, Tomaselli, Marcello, Sternberg, Marcelo, Schaub, Marcus, Santos-Reis, Margarida, Glushkova, Maria, Torres, María Guadalupe Almazán, Giroux, Marie-Andrée, de Graaff, Marie-Anne, Pons, Marie-Noëlle, Bauters, Marijn, Mazón, Marina, Frenzel, Mark, Didion, Markus, Wagner, Markus, Hamid, Maroof, Lopes, Marta L., Apple, Martha, Schädler, Martin, Weih, Martin, Gualmini, Matteo, Vadeboncoeur, Matthew A., Bierbaumer, Michael, Danger, Michael, Liddell, Michael, Mirtl, Michael, Scherer-Lorenzen, Michael, Růžek, Michal, Carbognani, Michele, Di Musciano, Michele, Matsushita, Michinari, Zhiyanski, Miglena, Pușcaș, Mihai, Barna, Milan, Ataka, Mioko, Jiangming, Mo, Alsafran, Mohammed, Carnol, Monique, Barsoum, Nadia, Tokuchi, Naoko, Eisenhauer, Nico, Lecomte, Nicolas, Filippova, Nina, Hölzel, Norbert, Ferlian, Olga, Romero, Oscar, Pinto, Osvaldo B., Jr, Peri, Pablo, Weber, Paige, Vittoz, Pascal, Turtureanu, Pavel Dan, Fleischer, Peter, Macreadie, Peter, Haase, Peter, Reich, Peter, Petřík, Petr, Choler, Philippe, Marmonier, Pierre, Muriel, Priscilla, Ponette, Quentin, Guariento, Rafael Dettogni, Canessa, Rafaella, Kiese, Ralf, Hewitt, Rebecca, Rønn, Regin, Adrian, Rita, Kanka, Róbert, Weigel, Robert, Gatti, Roberto Cazzolla, Martins, Rodrigo Lemes, Georges, Romain, Meneses, Rosa Isela, Gavilán, Rosario G., Dasgupta, Sabyasachi, Wittlinger, Sally, Puijalon, Sara, Freda, Sarah, Suzuki, Satoshi, Charles, Sean, Gogo, Sébastien, Drollinger, Simon, Mereu, Simone, Wipf, Sonja, Trevathan-Tackett, Stacey, Löfgren, Stefan, Stoll, Stefan, Trogisch, Stefan, Hoeber, Stefanie, Seitz, Steffen, Glatzel, Stephan, Milton, Sue J., Dousset, Sylvie, Mori, Taiki, Sato, Takanori, Ise, Takeshi, Hishi, Takuo, Kenta, Tanaka, Nakaji, Tatsuro, Michelan, Thaisa Sala, Camboulive, Thierry, Mozdzer, Thomas J., Scholten, Thomas, Spiegelberger, Thomas, Zechmeister, Thomas, Kleinebecker, Till, Hiura, Tsutom, Enoki, Tsutomu, Ursu, Tudor-Mihai, di Cella, Umberto Morra, Hamer, Ute, Klaus, Valentin H., Rêgo, Vanessa Mendes, Di Cecco, Valter, Busch, Verena, Fontana, Veronika, Piscová, Veronika, Carbonell, Victoria, Ochoa, Victoria, Bretagnolle, Vincent, Maire, Vincent, Farjalla, Vinicius, Zhou, Wenjun, Luo, Wentao, McDowell, William H., Hu, Yalin, Utsumi, Yasuhiro, Kominami, Yuji, Zaika, Yulia, Rozhkov, Yury, Kotroczó, Zsolt, Tóth, Zsolt, Djukic, Ika, Kepfer-Rojas, Sebastian, Schmidt, Inger Kappel, Larsen, Klaus Steenberg, Beier, Claus, Berg, Björn, and Verheyen, Kris
- Published
- 2018
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6. LONG-DISTANCE WANDERING AND MATING BY THE DANCING WHITE LADY SPIDER (LEUCORCHESTRIS ARENICOLA) (ARANEAE, SPARASSIDAE) ACROSS NAMIB DUNES
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Henschel, Joh R and BioStor
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- 2002
7. Long-Distance Wandering and Mating by the Dancing White Lady Spider (Leucorchestris arenicola) (Araneae, Sparassidae) across Namib Dunes
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Henschel, Joh R.
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- 2002
8. Costs of Aggregation: Shadow Competition in a Sit-and-Wait Predator
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Lubin, Yael, Henschel, Joh R., and Baker, Mitchell B.
- Published
- 2001
9. Allochthonous Aquatic Insects Increase Predation and Decrease Herbivory in River Shore Food Webs
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Henschel, Joh R., Mahsberg, Dieter, and Stumpf, Helmut
- Published
- 2001
10. Predation as a Major Cost of Reproduction in Namib Desert Tenebrionid Beetles
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Polis, Gary A., Barnes, Joseph D., Seely, Mary K., Henschel, Joh R., and Enders, Margit M.
- Published
- 1998
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11. Mean height increase in saplings of a keystone woody savanna species over 15 years similar to that over a single season
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Seymour, Colleen L., primary, Joseph, Grant S., additional, Calitz, Wynand, additional, Henschel, Joh R., additional, Ramaswiela, Tshililo, additional, and van der Merwe, Helga, additional
- Published
- 2022
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12. HELGA'S DUNE: 40 YEARS OF DUNE DYNAMICS IN THE NAMIB DESERT
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BESLER, HELGA, LANCASTER, NICHOLAS, BRISTOW, CHARLES, HENSCHEL, JOH, LIVINGSTONE, IAN, SEELY, MARY, and WHITE, KEVIN
- Published
- 2013
13. Effects of extreme climatic events on small-scale spatial patterns: a 20-year study of the distribution of a desert spider
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Birkhofer, Klaus, Henschel, Joh, and Lubin, Yael
- Published
- 2012
14. Cryptic subterranean diversity: regional phylogeography of the sand termite Psammotermes allocerus Silvestri, 1908 in the wider Namib region
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Gunter, Felicitas, primary, Oldeland, Jens, additional, Picker, Mike D., additional, Henschel, Joh R., additional, and Jürgens, Norbert, additional
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- 2022
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15. Spatial-Pattern Analysis in a Territorial Spider: Evidence for Multi-Scale Effects
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Birkhofer, Klaus, Henschel, Joh R., and Scheu, Stefan
- Published
- 2006
16. A bioassay of mine-affected soils and ameliorants in semi-arid rehabilitation
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Neethling, Chrizette D, Milton, Suzanne J, Buschke, Falko T, Henschel, Joh R, van Deventer, Pieter W, and Esterhuyse, Surina
- Abstract
Global restoration is a priority given the onset of the United Nations’ decade for restoration. It is challenging to restore arid lands from mining impacts, especially where topsoil deficits exist. Successful rehabilitation is essential for alternative land use after mining. This bioassay aimed to establish whether and why some combinations of iron ore mine-affected soils and ameliorants are more effective in promoting plant growth than others. We examined the responses of one thousand radishes (Raphanus sativus) to five mine-affected soils and four soil ameliorations (soil improvement using fertiliser and organic matter) over two different seasons (early and late rainy seasons). We found that soil characteristics affected plant production regardless of amelioration and that some soil/amelioration combinations were significantly better than others. Topsoil ameliorated by moderate fertiliser application produced the best results. Waste rock could support germination and plant production when ameliorated with certain organic compost and fertiliser combinations. Untreated mine-affected soils had low to no plant production. Plant responses to the different soil/amelioration combinations were affected by season. Our findings suggest that area-specific bioassay investigations and their results could improve management decisions to achieve rehabilitation targets for mine-affected soils.
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- 2023
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17. Long-Term Growth Patterns of Welwitschia mirabilis, a Long-Lived Plant of the Namib Desert (Including a Bibliography)
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Henschel, Joh R. and Seely, Mary K.
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- 2000
18. Developing an environmental research platform in the Karoo at the Square Kilometre Array
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Van der Merwe, Helga, primary, Milton, Suzanne J., additional, Dean, W. Richard J., additional, O'Connor, Tim G., additional, and Henschel, Joh R., additional
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- 2021
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19. Long-Term Population Dynamics of Namib Desert Tenebrionid Beetles Reveal Complex Relationships to Pulse-Reserve Conditions
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Henschel, Joh R., primary
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- 2021
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20. A CFD study of wind patterns over a desert dune and the effect on seed dispersion
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Joubert, Eugéne C., Harms, Thomas M., Muller, Annethea, Hipondoka, Martin, and Henschel, Joh R.
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- 2012
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21. Ecophysiology of atmospheric moisture in the Namib Desert
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Henschel, Joh R. and Seely, Mary K.
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- 2008
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22. Use of local cues in the night-time navigation of the wandering desert spider Leucorchestris arenicola (Araneae, Sparassidae)
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Nørgaard, Thomas, Henschel, Joh R., and Wehner, Rüdiger
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- 2007
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23. The night-time temporal window of locomotor activity in the Namib Desert long-distance wandering spider, Leucorchestris arenicola
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Nørgaard, Thomas, Henschel, Joh R., and Wehner, Rüdiger
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- 2006
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24. Largest on earth: Discovery of a new type of fairy circle in Angola supports a termite origin
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Jürgens, Norbert, primary, Gunter, Felicitas, additional, Oldeland, Jens, additional, Groengroeft, Alexander, additional, Henschel, Joh R., additional, Oncken, Imke, additional, and Picker, Mike D., additional
- Published
- 2020
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25. Dispersal Mechanisms of Stegodyphus (Eresidae): Do They Balloon?
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Henschel, Joh R., Schneider, Jutta, and Lubin, Yael D.
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- 1995
26. Fog and fauna of the Namib Desert: past and future
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Mitchell, Duncan, primary, Henschel, Joh R., additional, Hetem, Robyn S., additional, Wassenaar, Theo D., additional, Strauss, W. Maartin, additional, Hanrahan, Shirley A., additional, and Seely, Mary K., additional
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- 2020
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27. Largest on earth: Discovery of a new type of fairy circle in Angola supports a termite origin.
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Jürgens, Norbert, Gunter, Felicitas, Oldeland, Jens, Groengroeft, Alexander, Henschel, Joh R., Oncken, Imke, and Picker, Mike D.
- Subjects
TERMITES ,DESERTS ,CONVERGENT evolution ,FAIRIES ,DESERT plants - Abstract
1. Circular bare patches occur in high numbers among the vegetation of the Namib Desert margin. There is an ongoing scientific debate on the origin of these so‐called "fairy circles" (FCs). One of the most frequently discussed hypotheses regards the bare patches to be the result of localised herbivory by sand termites of the genus Psammotermes (family Rhinotermitidae). 2. In all earlier publications, the fairy circles of the Namib Desert region within their entire range from Angola through Namibia to South Africa were, in principle, regarded to be of one type, albeit increasing in size towards the north. Here we present evidence that at −16.23° latitude there is an abrupt discontinuity which separates the FCs on either side from each other. 3. South of this discontinuity all studied FCs share the properties of the previously described fairy circles in Namibia and South Africa, especially the presence of Psammotermes termites. 4. In contrast, north of −16.23°S the FCs are much larger and are caused by a different and undescribed termite species, most closely related to the harvester termite genus Microhodotermes (family Hodotermitidae). The two sets of fairy circles differ in a specific set of morphological features, associated termites, and soil parameters. 5. The observed juxtaposition of the newly discovered large structures caused by a hodotermitid termite and the Psammotermes FCs caused by a rhinotermitid species is interpreted as an interesting example of convergent evolution resulting in similar ecological structures. [ABSTRACT FROM AUTHOR]
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- 2021
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28. Spider revolutions
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Henschel, Joh
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Spiders -- Physiological aspects - Published
- 1995
29. Effects of short-term intensive trampling on Karoo vegetation
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McManus, Jeannine, primary, Goets, Stefan A, additional, Bond, William J, additional, Henschel, Joh R, additional, Smuts, Bool, additional, and Milton, Suzanne J, additional
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- 2018
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30. Reflections on the Karoo Special Issue: towards an interdisciplinary research agenda for South Africa’s drylands
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Hoffman, M Timm, primary, Walker, Cherryl, additional, and Henschel, Joh R, additional
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- 2018
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31. Reflections, applications and future directions of Long-Term Ecological Research at Tierberg
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Arena, Gina, primary, van der Merwe, Helga, additional, Todd, Simon W, additional, Pauw, Marco J, additional, Milton, Suzanne J, additional, Dean, W Richard J, additional, and Henschel, Joh R, additional
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- 2018
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32. Web spider abundance is affected by sheep farming in the Karoo
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Henschel, Joh R, primary and Lubin, Yael, additional
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- 2018
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33. Introduction to the Karoo Special Issue: Trajectories of Change in the Anthropocene
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Henschel, Joh R, primary, Hoffman, M Timm, additional, and Walker, Cherryl, additional
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- 2018
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34. Roots point to water sources ofWelwitschia mirabilisin a hyperarid desert
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Henschel, Joh R., primary, Wassenaar, Theo D., additional, Kanandjembo, Angie, additional, Louw, Michele Kilbourn, additional, Neef, Götz, additional, Shuuya, Titus, additional, and Soderberg, Keir, additional
- Published
- 2018
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35. Early stage litter decomposition across biomes
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Djukic, Ika, primary, Kepfer-Rojas, Sebastian, additional, Schmidt, Inger Kappel, additional, Larsen, Klaus Steenberg, additional, Beier, Claus, additional, Berg, Björn, additional, Verheyen, Kris, additional, Caliman, Adriano, additional, Paquette, Alain, additional, Gutiérrez-Girón, Alba, additional, Humber, Alberto, additional, Valdecantos, Alejandro, additional, Petraglia, Alessandro, additional, Alexander, Heather, additional, Augustaitis, Algirdas, additional, Saillard, Amélie, additional, Fernández, Ana Carolina Ruiz, additional, Sousa, Ana I., additional, Lillebø, Ana I., additional, da Rocha Gripp, Anderson, additional, Francez, André-Jean, additional, Fischer, Andrea, additional, Bohner, Andreas, additional, Malyshev, Andrey, additional, Andrić, Andrijana, additional, Smith, Andy, additional, Stanisci, Angela, additional, Seres, Anikó, additional, Schmidt, Anja, additional, Avila, Anna, additional, Probst, Anne, additional, Ouin, Annie, additional, Khuroo, Anzar A., additional, Verstraeten, Arne, additional, Palabral-Aguilera, Arely N., additional, Stefanski, Artur, additional, Gaxiola, Aurora, additional, Muys, Bart, additional, Bosman, Bernard, additional, Ahrends, Bernd, additional, Parker, Bill, additional, Sattler, Birgit, additional, Yang, Bo, additional, Juráni, Bohdan, additional, Erschbamer, Brigitta, additional, Ortiz, Carmen Eugenia Rodriguez, additional, Christiansen, Casper T., additional, Carol Adair, E., additional, Meredieu, Céline, additional, Mony, Cendrine, additional, Nock, Charles A., additional, Chen, Chi-Ling, additional, Wang, Chiao-Ping, additional, Baum, Christel, additional, Rixen, Christian, additional, Delire, Christine, additional, Piscart, Christophe, additional, Andrews, Christopher, additional, Rebmann, Corinna, additional, Branquinho, Cristina, additional, Polyanskaya, Dana, additional, Delgado, David Fuentes, additional, Wundram, Dirk, additional, Radeideh, Diyaa, additional, Ordóñez-Regil, Eduardo, additional, Crawford, Edward, additional, Preda, Elena, additional, Tropina, Elena, additional, Groner, Elli, additional, Lucot, Eric, additional, Hornung, Erzsébet, additional, Gacia, Esperança, additional, Lévesque, Esther, additional, Benedito, Evanilde, additional, Davydov, Evgeny A., additional, Ampoorter, Evy, additional, Bolzan, Fabio Padilha, additional, Varela, Felipe, additional, Kristöfel, Ferdinand, additional, Maestre, Fernando T., additional, Maunoury-Danger, Florence, additional, Hofhansl, Florian, additional, Kitz, Florian, additional, Sutter, Flurin, additional, Cuesta, Francisco, additional, de Almeida Lobo, Francisco, additional, de Souza, Franco Leandro, additional, Berninger, Frank, additional, Zehetner, Franz, additional, Wohlfahrt, Georg, additional, Vourlitis, George, additional, Carreño-Rocabado, Geovana, additional, Arena, Gina, additional, Pinha, Gisele Daiane, additional, González, Grizelle, additional, Canut, Guylaine, additional, Lee, Hanna, additional, Verbeeck, Hans, additional, Auge, Harald, additional, Pauli, Harald, additional, Nacro, Hassan Bismarck, additional, Bahamonde, Héctor A., additional, Feldhaar, Heike, additional, Jäger, Heinke, additional, Serrano, Helena C., additional, Verheyden, Hélène, additional, Bruelheide, Helge, additional, Meesenburg, Henning, additional, Jungkunst, Hermann, additional, Jactel, Hervé, additional, Shibata, Hideaki, additional, Kurokawa, Hiroko, additional, Rosas, Hugo López, additional, Rojas Villalobos, Hugo L., additional, Yesilonis, Ian, additional, Melece, Inara, additional, Van Halder, Inge, additional, Quirós, Inmaculada García, additional, Makelele, Isaac, additional, Senou, Issaka, additional, Fekete, István, additional, Mihal, Ivan, additional, Ostonen, Ivika, additional, Borovská, Jana, additional, Roales, Javier, additional, Shoqeir, Jawad, additional, Lata, Jean-Christophe, additional, Theurillat, Jean-Paul, additional, Probst, Jean-Luc, additional, Zimmerman, Jess, additional, Vijayanathan, Jeyanny, additional, Tang, Jianwu, additional, Thompson, Jill, additional, Doležal, Jiří, additional, Sanchez-Cabeza, Joan-Albert, additional, Merlet, Joël, additional, Henschel, Joh, additional, Neirynck, Johan, additional, Knops, Johannes, additional, Loehr, John, additional, von Oppen, Jonathan, additional, Þorláksdóttir, Jónína Sigríður, additional, Löffler, Jörg, additional, Cardoso-Mohedano, José-Gilberto, additional, Benito-Alonso, José-Luis, additional, Torezan, Jose Marcelo, additional, Morina, Joseph C., additional, Jiménez, Juan J., additional, Quinde, Juan Dario, additional, Alatalo, Juha, additional, Seeber, Julia, additional, Stadler, Jutta, additional, Kriiska, Kaie, additional, Coulibaly, Kalifa, additional, Fukuzawa, Karibu, additional, Szlavecz, Katalin, additional, Gerhátová, Katarína, additional, Lajtha, Kate, additional, Käppeler, Kathrin, additional, Jennings, Katie A., additional, Tielbörger, Katja, additional, Hoshizaki, Kazuhiko, additional, Green, Ken, additional, Yé, Lambiénou, additional, Pazianoto, Laryssa Helena Ribeiro, additional, Dienstbach, Laura, additional, Williams, Laura, additional, Yahdjian, Laura, additional, Brigham, Laurel M., additional, van den Brink, Liesbeth, additional, Rustad, Lindsey, additional, Zhang, Lipeng, additional, Morillas, Lourdes, additional, Xiankai, Lu, additional, Carneiro, Luciana Silva, additional, Di Martino, Luciano, additional, Villar, Luis, additional, Bader, Maaike Y., additional, Morley, Madison, additional, Lebouvier, Marc, additional, Tomaselli, Marcello, additional, Sternberg, Marcelo, additional, Schaub, Marcus, additional, Santos-Reis, Margarida, additional, Glushkova, Maria, additional, Torres, María Guadalupe Almazán, additional, Giroux, Marie-Andrée, additional, de Graaff, Marie-Anne, additional, Pons, Marie-Noëlle, additional, Bauters, Marijn, additional, Mazón, Marina, additional, Frenzel, Mark, additional, Didion, Markus, additional, Wagner, Markus, additional, Hamid, Maroof, additional, Lopes, Marta L., additional, Apple, Martha, additional, Schädler, Martin, additional, Weih, Martin, additional, Gualmini, Matteo, additional, Vadeboncoeur, Matthew A., additional, Bierbaumer, Michael, additional, Danger, Michael, additional, Liddell, Michael, additional, Mirtl, Michael, additional, Scherer-Lorenzen, Michael, additional, Růžek, Michal, additional, Carbognani, Michele, additional, Di Musciano, Michele, additional, Matsushita, Michinari, additional, Zhiyanski, Miglena, additional, Pușcaș, Mihai, additional, Barna, Milan, additional, Ataka, Mioko, additional, Jiangming, Mo, additional, Alsafran, Mohammed, additional, Carnol, Monique, additional, Barsoum, Nadia, additional, Tokuchi, Naoko, additional, Eisenhauer, Nico, additional, Lecomte, Nicolas, additional, Filippova, Nina, additional, Hölzel, Norbert, additional, Ferlian, Olga, additional, Romero, Oscar, additional, Pinto, Osvaldo B., additional, Peri, Pablo, additional, Weber, Paige, additional, Vittoz, Pascal, additional, Turtureanu, Pavel Dan, additional, Fleischer, Peter, additional, Macreadie, Peter, additional, Haase, Peter, additional, Reich, Peter, additional, Petřík, Petr, additional, Choler, Philippe, additional, Marmonier, Pierre, additional, Muriel, Priscilla, additional, Ponette, Quentin, additional, Guariento, Rafael Dettogni, additional, Canessa, Rafaella, additional, Kiese, Ralf, additional, Hewitt, Rebecca, additional, Rønn, Regin, additional, Adrian, Rita, additional, Kanka, Róbert, additional, Weigel, Robert, additional, Gatti, Roberto Cazzolla, additional, Martins, Rodrigo Lemes, additional, Georges, Romain, additional, Meneses, Rosa Isela, additional, Gavilán, Rosario G., additional, Dasgupta, Sabyasachi, additional, Wittlinger, Sally, additional, Puijalon, Sara, additional, Freda, Sarah, additional, Suzuki, Satoshi, additional, Charles, Sean, additional, Gogo, Sébastien, additional, Drollinger, Simon, additional, Mereu, Simone, additional, Wipf, Sonja, additional, Trevathan-Tackett, Stacey, additional, Löfgren, Stefan, additional, Stoll, Stefan, additional, Trogisch, Stefan, additional, Hoeber, Stefanie, additional, Seitz, Steffen, additional, Glatzel, Stephan, additional, Milton, Sue J., additional, Dousset, Sylvie, additional, Mori, Taiki, additional, Sato, Takanori, additional, Ise, Takeshi, additional, Hishi, Takuo, additional, Kenta, Tanaka, additional, Nakaji, Tatsuro, additional, Michelan, Thaisa Sala, additional, Camboulive, Thierry, additional, Mozdzer, Thomas J., additional, Scholten, Thomas, additional, Spiegelberger, Thomas, additional, Zechmeister, Thomas, additional, Kleinebecker, Till, additional, Hiura, Tsutom, additional, Enoki, Tsutomu, additional, Ursu, Tudor-Mihai, additional, di Cella, Umberto Morra, additional, Hamer, Ute, additional, Klaus, Valentin H., additional, Rêgo, Vanessa Mendes, additional, Di Cecco, Valter, additional, Busch, Verena, additional, Fontana, Veronika, additional, Piscová, Veronika, additional, Carbonell, Victoria, additional, Ochoa, Victoria, additional, Bretagnolle, Vincent, additional, Maire, Vincent, additional, Farjalla, Vinicius, additional, Zhou, Wenjun, additional, Luo, Wentao, additional, McDowell, William H., additional, Hu, Yalin, additional, Utsumi, Yasuhiro, additional, Kominami, Yuji, additional, Zaika, Yulia, additional, Rozhkov, Yury, additional, Kotroczó, Zsolt, additional, and Tóth, Zsolt, additional
- Published
- 2018
- Full Text
- View/download PDF
36. Identifying the determinants of tree distributions along a large ephemeral river
- Author
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Douglas, Caitlin M. S., primary, Cowlishaw, Guy, additional, Harrison, Xavier A., additional, Henschel, Joh R., additional, Pettorelli, Nathalie, additional, and Mulligan, Mark, additional
- Published
- 2018
- Full Text
- View/download PDF
37. Early stage litter decomposition across biomes
- Author
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Djukic, Ika, Kepfer-Rojas, Sebastian, Schmidt, Inger Kappel, Larsen, Klaus Steenberg, Beier, Claus, Berg, Björn, Verheyen, Kris, Caliman, Adriano, Paquette, Alain, Gutiérrez-Girón, Alba, Humber, Alberto, Valdecantos, Alejandro, Petraglia, Alessandro, Alexander, Heather, Augustaitis, Algirdas, Saillard, Amélie, Fernández, Ana Carolina Ruiz, Sousa, Ana I., Lillebø, Ana I., da Rocha Gripp, Anderson, Francez, André-Jean, Fischer, Andrea, Bohner, Andreas, Malyshev, Andrey, Andrić, Andrijana, Smith, Andy, Stanisci, Angela, Seres, Anikó, Schmidt, Anja, Avila, Anna, Probst, Anne, Ouin, Annie, Khuroo, Anzar A., Verstraeten, Arne, Palabral-Aguilera, Arely N., Stefanski, Artur, Gaxiola, Aurora, Muys, Bart, Bosman, Bernard, Ahrends, Bernd, Parker, Bill, Sattler, Birgit, Yang, Bo, Juráni, Bohdan, Erschbamer, Brigitta, Ortiz, Carmen Eugenia Rodriguez, Christiansen, Casper T., Carol Adair, E., Meredieu, Céline, Mony, Cendrine, Nock, Charles A., Chen, Chi-Ling, Wang, Chiao-Ping, Baum, Christel, Rixen, Christian, Delire, Christine, Piscart, Christophe, Andrews, Christopher, Rebmann, Corinna, Branquinho, Cristina, Polyanskaya, Dana, Delgado, David Fuentes, Wundram, Dirk, Radeideh, Diyaa, Ordóñez-Regil, Eduardo, Crawford, Edward, Preda, Elena, Tropina, Elena, Groner, Elli, Lucot, Eric, Hornung, Erzsébet, Gacia, Esperança, Lévesque, Esther, Benedito, Evanilde, Davydov, Evgeny A., Ampoorter, Evy, Bolzan, Fabio Padilha, Varela, Felipe, Kristöfel, Ferdinand, Maestre, Fernando T., Maunoury-Danger, Florence, Hofhansl, Florian, Kitz, Florian, Sutter, Flurin, Cuesta, Francisco, de Almeida Lobo, Francisco, de Souza, Franco Leandro, Berninger, Frank, Zehetner, Franz, Wohlfahrt, Georg, Vourlitis, George, Carreño-Rocabado, Geovana, Arena, Gina, Pinha, Gisele Daiane, González, Grizelle, Canut, Guylaine, Lee, Hanna, Verbeeck, Hans, Auge, Harald, Pauli, Harald, Nacro, Hassan Bismarck, Bahamonde, Héctor A., Feldhaar, Heike, Jäger, Heinke, Serrano, Helena C., Verheyden, Hélène, Bruelheide, Helge, Meesenburg, Henning, Jungkunst, Hermann, Jactel, Hervé, Shibata, Hideaki, Kurokawa, Hiroko, Rosas, Hugo López, Rojas Villalobos, Hugo L., Yesilonis, Ian, Melece, Inara, Van Halder, Inge, Quirós, Inmaculada García, Makelele, Isaac, Senou, Issaka, Fekete, István, Mihal, Ivan, Ostonen, Ivika, Borovská, Jana, Roales, Javier, Shoqeir, Jawad, Lata, Jean-Christophe, Theurillat, Jean-Paul, Probst, Jean-Luc, Zimmerman, Jess, Vijayanathan, Jeyanny, Tang, Jianwu, Thompson, Jill, Doležal, Jiří, Sanchez-Cabeza, Joan-Albert, Merlet, Joël, Henschel, Joh, Neirynck, Johan, Knops, Johannes, Loehr, John, von Oppen, Jonathan, Þorláksdóttir, Jónína Sigríður, Löffler, Jörg, Cardoso-Mohedano, José-Gilberto, Benito-Alonso, José-Luis, Torezan, Jose Marcelo, Morina, Joseph C., Jiménez, Juan J., Quinde, Juan Dario, Alatalo, Juha, Seeber, Julia, Stadler, Jutta, Kriiska, Kaie, Coulibaly, Kalifa, Fukuzawa, Karibu, Szlavecz, Katalin, Gerhátová, Katarína, Lajtha, Kate, Käppeler, Kathrin, Jennings, Katie A., Tielbörger, Katja, Hoshizaki, Kazuhiko, Green, Ken, Yé, Lambiénou, Pazianoto, Laryssa Helena Ribeiro, Dienstbach, Laura, Williams, Laura, Yahdjian, Laura, Brigham, Laurel M., van den Brink, Liesbeth, Rustad, Lindsey, Zhang, Lipeng, Morillas, Lourdes, Xiankai, Lu, Carneiro, Luciana Silva, Di Martino, Luciano, Villar, Luis, Bader, Maaike Y., Morley, Madison, Lebouvier, Marc, Tomaselli, Marcello, Sternberg, Marcelo, Schaub, Marcus, Santos-Reis, Margarida, Glushkova, Maria, Torres, María Guadalupe Almazán, Giroux, Marie-Andrée, de Graaff, Marie-Anne, Pons, Marie-Noëlle, Bauters, Marijn, Mazón, Marina, Frenzel, Mark, Didion, Markus, Wagner, Markus, Hamid, Maroof, Lopes, Marta L., Apple, Martha, Schädler, Martin, Weih, Martin, Gualmini, Matteo, Vadeboncoeur, Matthew A., Bierbaumer, Michael, Danger, Michael, Liddell, Michael, Mirtl, Michael, Scherer-Lorenzen, Michael, Růžek, Michal, Carbognani, Michele, Di Musciano, Michele, Matsushita, Michinari, Zhiyanski, Miglena, Pușcaș, Mihai, Barna, Milan, Ataka, Mioko, Jiangming, Mo, Alsafran, Mohammed, Carnol, Monique, Barsoum, Nadia, Tokuchi, Naoko, Eisenhauer, Nico, Lecomte, Nicolas, Filippova, Nina, Hölzel, Norbert, Ferlian, Olga, Romero, Oscar, Pinto, Osvaldo B., Peri, Pablo, Weber, Paige, Vittoz, Pascal, Turtureanu, Pavel Dan, Fleischer, Peter, Macreadie, Peter, Haase, Peter, Reich, Peter, Petřík, Petr, Choler, Philippe, Marmonier, Pierre, Muriel, Priscilla, Ponette, Quentin, Guariento, Rafael Dettogni, Canessa, Rafaella, Kiese, Ralf, Hewitt, Rebecca, Rønn, Regin, Adrian, Rita, Kanka, Róbert, Weigel, Robert, Gatti, Roberto Cazzolla, Martins, Rodrigo Lemes, Georges, Romain, Meneses, Rosa Isela, Gavilán, Rosario G., Dasgupta, Sabyasachi, Wittlinger, Sally, Puijalon, Sara, Freda, Sarah, Suzuki, Satoshi, Charles, Sean, Gogo, Sébastien, Drollinger, Simon, Mereu, Simone, Wipf, Sonja, Trevathan-Tackett, Stacey, Löfgren, Stefan, Stoll, Stefan, Trogisch, Stefan, Hoeber, Stefanie, Seitz, Steffen, Glatzel, Stephan, Milton, Sue J., Dousset, Sylvie, Mori, Taiki, Sato, Takanori, Ise, Takeshi, Hishi, Takuo, Kenta, Tanaka, Nakaji, Tatsuro, Michelan, Thaisa Sala, Camboulive, Thierry, Mozdzer, Thomas J., Scholten, Thomas, Spiegelberger, Thomas, Zechmeister, Thomas, Kleinebecker, Till, Hiura, Tsutom, Enoki, Tsutomu, Ursu, Tudor-Mihai, di Cella, Umberto Morra, Hamer, Ute, Klaus, Valentin H., Rêgo, Vanessa Mendes, Di Cecco, Valter, Busch, Verena, Fontana, Veronika, Piscová, Veronika, Carbonell, Victoria, Ochoa, Victoria, Bretagnolle, Vincent, Maire, Vincent, Farjalla, Vinicius, Zhou, Wenjun, Luo, Wentao, McDowell, William H., Hu, Yalin, Utsumi, Yasuhiro, Kominami, Yuji, Zaika, Yulia, Rozhkov, Yury, Kotroczó, Zsolt, Tóth, Zsolt, Djukic, Ika, Kepfer-Rojas, Sebastian, Schmidt, Inger Kappel, Larsen, Klaus Steenberg, Beier, Claus, Berg, Björn, Verheyen, Kris, Caliman, Adriano, Paquette, Alain, Gutiérrez-Girón, Alba, Humber, Alberto, Valdecantos, Alejandro, Petraglia, Alessandro, Alexander, Heather, Augustaitis, Algirdas, Saillard, Amélie, Fernández, Ana Carolina Ruiz, Sousa, Ana I., Lillebø, Ana I., da Rocha Gripp, Anderson, Francez, André-Jean, Fischer, Andrea, Bohner, Andreas, Malyshev, Andrey, Andrić, Andrijana, Smith, Andy, Stanisci, Angela, Seres, Anikó, Schmidt, Anja, Avila, Anna, Probst, Anne, Ouin, Annie, Khuroo, Anzar A., Verstraeten, Arne, Palabral-Aguilera, Arely N., Stefanski, Artur, Gaxiola, Aurora, Muys, Bart, Bosman, Bernard, Ahrends, Bernd, Parker, Bill, Sattler, Birgit, Yang, Bo, Juráni, Bohdan, Erschbamer, Brigitta, Ortiz, Carmen Eugenia Rodriguez, Christiansen, Casper T., Carol Adair, E., Meredieu, Céline, Mony, Cendrine, Nock, Charles A., Chen, Chi-Ling, Wang, Chiao-Ping, Baum, Christel, Rixen, Christian, Delire, Christine, Piscart, Christophe, Andrews, Christopher, Rebmann, Corinna, Branquinho, Cristina, Polyanskaya, Dana, Delgado, David Fuentes, Wundram, Dirk, Radeideh, Diyaa, Ordóñez-Regil, Eduardo, Crawford, Edward, Preda, Elena, Tropina, Elena, Groner, Elli, Lucot, Eric, Hornung, Erzsébet, Gacia, Esperança, Lévesque, Esther, Benedito, Evanilde, Davydov, Evgeny A., Ampoorter, Evy, Bolzan, Fabio Padilha, Varela, Felipe, Kristöfel, Ferdinand, Maestre, Fernando T., Maunoury-Danger, Florence, Hofhansl, Florian, Kitz, Florian, Sutter, Flurin, Cuesta, Francisco, de Almeida Lobo, Francisco, de Souza, Franco Leandro, Berninger, Frank, Zehetner, Franz, Wohlfahrt, Georg, Vourlitis, George, Carreño-Rocabado, Geovana, Arena, Gina, Pinha, Gisele Daiane, González, Grizelle, Canut, Guylaine, Lee, Hanna, Verbeeck, Hans, Auge, Harald, Pauli, Harald, Nacro, Hassan Bismarck, Bahamonde, Héctor A., Feldhaar, Heike, Jäger, Heinke, Serrano, Helena C., Verheyden, Hélène, Bruelheide, Helge, Meesenburg, Henning, Jungkunst, Hermann, Jactel, Hervé, Shibata, Hideaki, Kurokawa, Hiroko, Rosas, Hugo López, Rojas Villalobos, Hugo L., Yesilonis, Ian, Melece, Inara, Van Halder, Inge, Quirós, Inmaculada García, Makelele, Isaac, Senou, Issaka, Fekete, István, Mihal, Ivan, Ostonen, Ivika, Borovská, Jana, Roales, Javier, Shoqeir, Jawad, Lata, Jean-Christophe, Theurillat, Jean-Paul, Probst, Jean-Luc, Zimmerman, Jess, Vijayanathan, Jeyanny, Tang, Jianwu, Thompson, Jill, Doležal, Jiří, Sanchez-Cabeza, Joan-Albert, Merlet, Joël, Henschel, Joh, Neirynck, Johan, Knops, Johannes, Loehr, John, von Oppen, Jonathan, Þorláksdóttir, Jónína Sigríður, Löffler, Jörg, Cardoso-Mohedano, José-Gilberto, Benito-Alonso, José-Luis, Torezan, Jose Marcelo, Morina, Joseph C., Jiménez, Juan J., Quinde, Juan Dario, Alatalo, Juha, Seeber, Julia, Stadler, Jutta, Kriiska, Kaie, Coulibaly, Kalifa, Fukuzawa, Karibu, Szlavecz, Katalin, Gerhátová, Katarína, Lajtha, Kate, Käppeler, Kathrin, Jennings, Katie A., Tielbörger, Katja, Hoshizaki, Kazuhiko, Green, Ken, Yé, Lambiénou, Pazianoto, Laryssa Helena Ribeiro, Dienstbach, Laura, Williams, Laura, Yahdjian, Laura, Brigham, Laurel M., van den Brink, Liesbeth, Rustad, Lindsey, Zhang, Lipeng, Morillas, Lourdes, Xiankai, Lu, Carneiro, Luciana Silva, Di Martino, Luciano, Villar, Luis, Bader, Maaike Y., Morley, Madison, Lebouvier, Marc, Tomaselli, Marcello, Sternberg, Marcelo, Schaub, Marcus, Santos-Reis, Margarida, Glushkova, Maria, Torres, María Guadalupe Almazán, Giroux, Marie-Andrée, de Graaff, Marie-Anne, Pons, Marie-Noëlle, Bauters, Marijn, Mazón, Marina, Frenzel, Mark, Didion, Markus, Wagner, Markus, Hamid, Maroof, Lopes, Marta L., Apple, Martha, Schädler, Martin, Weih, Martin, Gualmini, Matteo, Vadeboncoeur, Matthew A., Bierbaumer, Michael, Danger, Michael, Liddell, Michael, Mirtl, Michael, Scherer-Lorenzen, Michael, Růžek, Michal, Carbognani, Michele, Di Musciano, Michele, Matsushita, Michinari, Zhiyanski, Miglena, Pușcaș, Mihai, Barna, Milan, Ataka, Mioko, Jiangming, Mo, Alsafran, Mohammed, Carnol, Monique, Barsoum, Nadia, Tokuchi, Naoko, Eisenhauer, Nico, Lecomte, Nicolas, Filippova, Nina, Hölzel, Norbert, Ferlian, Olga, Romero, Oscar, Pinto, Osvaldo B., Peri, Pablo, Weber, Paige, Vittoz, Pascal, Turtureanu, Pavel Dan, Fleischer, Peter, Macreadie, Peter, Haase, Peter, Reich, Peter, Petřík, Petr, Choler, Philippe, Marmonier, Pierre, Muriel, Priscilla, Ponette, Quentin, Guariento, Rafael Dettogni, Canessa, Rafaella, Kiese, Ralf, Hewitt, Rebecca, Rønn, Regin, Adrian, Rita, Kanka, Róbert, Weigel, Robert, Gatti, Roberto Cazzolla, Martins, Rodrigo Lemes, Georges, Romain, Meneses, Rosa Isela, Gavilán, Rosario G., Dasgupta, Sabyasachi, Wittlinger, Sally, Puijalon, Sara, Freda, Sarah, Suzuki, Satoshi, Charles, Sean, Gogo, Sébastien, Drollinger, Simon, Mereu, Simone, Wipf, Sonja, Trevathan-Tackett, Stacey, Löfgren, Stefan, Stoll, Stefan, Trogisch, Stefan, Hoeber, Stefanie, Seitz, Steffen, Glatzel, Stephan, Milton, Sue J., Dousset, Sylvie, Mori, Taiki, Sato, Takanori, Ise, Takeshi, Hishi, Takuo, Kenta, Tanaka, Nakaji, Tatsuro, Michelan, Thaisa Sala, Camboulive, Thierry, Mozdzer, Thomas J., Scholten, Thomas, Spiegelberger, Thomas, Zechmeister, Thomas, Kleinebecker, Till, Hiura, Tsutom, Enoki, Tsutomu, Ursu, Tudor-Mihai, di Cella, Umberto Morra, Hamer, Ute, Klaus, Valentin H., Rêgo, Vanessa Mendes, Di Cecco, Valter, Busch, Verena, Fontana, Veronika, Piscová, Veronika, Carbonell, Victoria, Ochoa, Victoria, Bretagnolle, Vincent, Maire, Vincent, Farjalla, Vinicius, Zhou, Wenjun, Luo, Wentao, McDowell, William H., Hu, Yalin, Utsumi, Yasuhiro, Kominami, Yuji, Zaika, Yulia, Rozhkov, Yury, Kotroczó, Zsolt, and Tóth, Zsolt
- Abstract
Through litter decomposition enormous amounts of carbon is emitted to the atmosphere. Numerous large-scale decomposition experiments have been conducted focusing on this fundamental soil process in order to understand the controls on the terrestrial carbon transfer to the atmosphere. However, previous studies were mostly based on site-specific litter and methodologies, adding major uncertainty to syntheses, comparisons and meta-analyses across different experiments and sites. In the TeaComposition initiative, the potential litter decomposition is investigated by using standardized substrates (Rooibos and Green tea) for comparison of litter mass loss at 336 sites (ranging from −9 to +26 °C MAT and from 60 to 3113 mm MAP) across different ecosystems. In this study we tested the effect of climate (temperature and moisture), litter type and land-use on early stage decomposition (3 months) across nine biomes. We show that litter quality was the predominant controlling factor in early stage litter decomposition, which explained about 65% of the variability in litter decomposition at a global scale. The effect of climate, on the other hand, was not litter specific and explained <0.5% of the variation for Green tea and 5% for Rooibos tea, and was of significance only under unfavorable decomposition conditions (i.e. xeric versus mesic environments). When the data were aggregated at the biome scale, climate played a significant role on decomposition of both litter types (explaining 64% of the variation for Green tea and 72% for Rooibos tea). No significant effect of land-use on early stage litter decomposition was noted within the temperate biome. Our results indicate that multiple drivers are affecting early stage litter mass loss with litter quality being dominant. In order to be able to quantify the relative importance of the different drivers over time, long-term studies combined with experimental trials are needed.
- Published
- 2018
38. Use of local cues in the night-time navigation of the wandering desert spider Leucorchestris arenicola (Araneae, Sparassidae)
- Author
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Nørgaard, Thomas, Henschel, Joh, Wehner, Rüdiger, Nørgaard, Thomas, Henschel, Joh, and Wehner, Rüdiger
- Abstract
Adult male Leucorchestris arenicola can walk round-trips of several tens of meters in search of females. Most excursions end with the spiders returning to their burrow. For small animals homing over distances of several meters is theoretically impossible without the aid of external cues. It was investigated, whether the spiders use local cues or they rely solely on global cues. Individually marked male spiders were captured during their excursions and displaced several meters inside an opaque box. Ten out of twelve displaced spiders returned to their burrows. This shows that the male L. arenicola are using local cues during their homing, as the comparatively small displacement distances could not be detected by means of global, e.g. celestial cues. In order to test whether the spiders could be using olfactory guidance, the burrows were displaced by 2m while the spiders were out on their journeys. In 12 out of 15 experiments, the spiders did not find their burrows. These results show that the burrows do not function as olfactory beacons for the homing spiders
- Published
- 2018
39. The night-time temporal window of locomotor activity in the Namib Desert long-distance wandering spider, Leucorchestris arenicola
- Author
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Nørgaard, Thomas, Henschel, Joh, Wehner, Rüdiger, Nørgaard, Thomas, Henschel, Joh, and Wehner, Rüdiger
- Abstract
Even though being active exclusively after sunset, the male Leucorchestris arenicola spiders are able to return to their point of departure by following bee-line routes of up to several hundreds of meters in length. While performing this kind of long-distance path integration they must rely on external cues to adjust for navigational errors. Many external cues which could be used by the spiders change dramatically or disappear altogether in the transition period from day to night. Hence, it is therefore imperative to know exactly when after sunset the spiders navigate in order to find out how they do it. To explore this question, we monitored their locomotor activity with data loggers equipped with infrared beam sensors. Our results show that the male spiders are most active in the period between the end and the beginning of the astronomical twilight period. Moreover, they prefer the moonless, i.e. darkest times at night. Hence, we conclude that the males are truly—and extremely—nocturnal. We further show that they are able to navigate under the very dim light conditions prevailing on moonless nights, and thus do not have to rely on the moon or on moon-related patterns of polarised light as potential compass cues
- Published
- 2018
40. Monitoring tenebrionid beetle biodiversity in Namibia
- Author
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HENSCHEL, Joh R., GROHMANN, Constanze, SITEKETA, Veronica, and LINSENMAIR, K. Eduard
- Subjects
Darkling beetles ,Namib Desert ,Pitfall traps ,Trap size ,Species-effort curve - Abstract
Different field methods of determining abundance and species diversity of darkling beetles (Coleoptera, Tenebrionidae) were tested. A combination of the use of pitfall traps and linear transect surveys served as the best rapid assessment of diversity, while pitfall traps alone are good for estimating abundance. Trap size (15cm diameter vs. 10cm diameter) and different degrees of exposure to sun did not significantly affect the capture rate of beetles, which was highly variable between traps at a site, but there were differences between sites and seasons. A minimum of a full year of trapping is required before the slope of the species-effort curve begins to flatten when the most abundant species have been recorded. The curve continues to increase over the course of the next 20 years, by which time all species at a location have been recorded. Furthermore, long trapping periods covers different climatic conditions, reflecting that in the Namib Desert, long-term records are required to study biodiversity.
- Published
- 2010
41. TEMPORAL AND SPATIAL VARIABILITY OF GRASS PRODUCTIVITY IN THE CENTRAL NAMIB DESERT
- Author
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HENSCHEL, Joh R., BURKE, Antje, and SEELY, Mary
- Subjects
Grass biomass ,Storm cloud size ,Rainfall-productivity relationship ,Rapid assessment ,Patchy rainfall - Abstract
The production of grass was investigated on the gravel plains of the Central Namib Desert, Namibia, during 10 rainfall seasons sampled between 1989-2003. The aim was to evaluate the rainfall-productivity relationship, to elucidate the relationship between temporal and spatial variability, and to examine the spatial scale of patchiness. We compared two different methods and found that a less accurate rapid assessment of grass cover correlat- ed well with measurements of biomass. Our data were in agreement with previous determina- tions of the desert end of the curve of grassland productivity, and productivity was closely related to the rainfall of the particular season. There was high variability between years at study sites, especially in the west (CV=279%), where it rained more seldom than in the east (CV=86%). During all years rainfall was very patchy at a spatial scale of 5 km, which appar- ently reflected the storm path of individual rain clouds. Long-term monitoring should be continued in order to detect changes of pattern in this rainfall-driven system.
- Published
- 2005
42. Specific Microbial Communities Associate with the Rhizosphere of Welwitschia mirabilis, a Living Fossil
- Author
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National Research Foundation (South Africa), Valverde Portal, Ángel [0000-0003-0439-9605], Valverde Portal, Ángel, De Maayer, Pieter, Oberholster, Tanzelle, Henschel, Joh, Louw, Michele K., Cowan, Don A., National Research Foundation (South Africa), Valverde Portal, Ángel [0000-0003-0439-9605], Valverde Portal, Ángel, De Maayer, Pieter, Oberholster, Tanzelle, Henschel, Joh, Louw, Michele K., and Cowan, Don A.
- Abstract
Welwitschia mirabilis is an ancient and rare plant distributed along the western coast of Namibia and Angola. Several aspects of Welwitschia biology and ecology have been investigated, but very little is known about the microbial communities associated with this plant. This study reports on the bacterial and fungal communities inhabiting the rhizosphere of W. mirabilis and the surrounding bulk soil. Rhizosphere communities were dominated by sequences of Alphaproteobacteria and Euromycetes, while Actinobacteria, Alphaproteobacteria, and fungi of the class Dothideomycetes jointly dominated bulk soil communities. Although microbial communities within the rhizosphere and soil samples were highly variable, very few “species” (OTUs defined at a 97% identity cut-off) were shared between these two environments. There was a small ‘core’ rhizosphere bacterial community (formed by Nitratireductor, Steroidobacter, Pseudonocardia and three Phylobacteriaceae) that together with Rhizophagus, an arbuscular mycorrhizal fungus, and other putative plant growth-promoting microbes may interact synergistically to promote Welwitschia growth.
- Published
- 2016
43. Widespread dieback of riparian trees on a dammed ephemeral river and evidence of local mitigation by tributary flows
- Author
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Douglas, Caitlin M. S., primary, Mulligan, Mark, additional, Harrison, Xavier A., additional, Henschel, Joh R., additional, Pettorelli, Nathalie, additional, and Cowlishaw, Guy, additional
- Published
- 2016
- Full Text
- View/download PDF
44. Specific Microbial Communities Associate with the Rhizosphere of Welwitschia mirabilis, a Living Fossil
- Author
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Valverde, Angel, primary, De Maayer, Pieter, additional, Oberholster, Tanzelle, additional, Henschel, Joh, additional, Louw, Michele K., additional, and Cowan, Don, additional
- Published
- 2016
- Full Text
- View/download PDF
45. Introduction to the Karoo Special Issue: Trajectories of Change in the Anthropocene§.
- Author
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Henschel, Joh R, Hoffman, M Timm, and Walker, Cherryl
- Subjects
CLIMATE change ,ANTHROPOCENE Epoch ,WILDLIFE conservation ,GLOBAL environmental change ,BIODIVERSITY ,BIOMES - Abstract
The Karoo is an arid to semi-arid area across the western third of South Africa, comprising the Succulent Karoo and Nama-Karoo biomes. Its environment and people have experienced considerable changes, and now face new challenges as the Anthropocene unfolds. This Karoo Special Issue (KSI) brings together new information in 20 papers, a mixture of reviews, research articles and commentaries, significantly adding to previous syntheses of Karoo knowledge. The KSI comprises several sections focusing on different aspects of change, namely a lead article that provides an overview of social and environmental changes, followed by papers concerning changes over time from deep history to contemporary conditions (Xhaeruh to Karoo), insights from long-term studies at several sites across the area, different perspectives of ecosystem processes, and ending with a set of reflections and proposals for research priorities. We end this introduction by dedicating the KSI to two outstanding scholars of the Karoo: Dr Suzanne J Milton and Dr W Richard J Dean. These KSI papers, many of which were written by their colleagues, friends and former students, represents a Festschrift that celebrates and honours their research as well as the inspiration and leadership they gave to a generation of scientists. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
46. Reflections on the Karoo Special Issue: towards an interdisciplinary research agenda for South Africa’s drylands§.
- Author
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Hoffman, M Timm, Walker, Cherryl, and Henschel, Joh R
- Subjects
BIODIVERSITY ,CLIMATE change ,WILDLIFE conservation ,LAND use ,ENVIRONMENTAL research - Abstract
We begin this essay with reflections on major research themes highlighted by the Karoo Special Issue (KSI). These include concerns over land-use change, long-term monitoring, climate change, governance and the need for more interdisciplinary research. We also identify some of the novel contributions of the KSI around these themes and highlight research issues that require further attention. These include greater focus on the social-ecological impact of large-scale infrastructural developments and wildlife ranching, as well as the need for more longitudinal studies related to contemporary social issues. We conclude by outlining a simple framework for thinking about interdisciplinarity in future research efforts in the Karoo. The first axis relates to the natural science/social science continuum, while the second is concerned with the continuum between basic and applied science. Greater awareness of these two dimensions could not only encourage researchers to reflect more carefully on where their research fits in relation to the broader research needs of this region but could also promote interdisciplinarity within the research community. It could also bring researchers closer to the realities and needs of the people who live in and derive their livelihoods from Karoo environments. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
47. Effects of short-term intensive trampling on Karoo vegetation§.
- Author
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McManus, Jeannine, Goets, Stefan A, Bond, William J, Henschel, Joh R, Smuts, Bool, and Milton, Suzanne J
- Subjects
GRAZING ,BIODIVERSITY ,GRASSLANDS ,SUCCULENT plants ,SHRUBS ,PLANT species ,RANGE management - Abstract
Plant growth forms likely respond differently to disturbances such as trampling. We investigated the trampling effect of 1 600 sheep encamped at night in temporary enclosures (kraals, corrals or pens), which were relocated weekly. To examine trampling effects and regeneration rates of the various growth forms we compared vegeta- tion composition, canopy cover and foliar nitrogen inside and outside kraals, between one and 12 months after the trampling event. We predicted that inside kraals (1) succulent and non-succulent shrubs would be affected more severely than grasses, (2) perennial plant cover would decrease compared with annual plant cover, (3) foliar nitrogen concentrations would increase, and (4) vegetation recovery would be affected by time and rainfall since last use of the kraal. Grasses and shrubs (succulent and non-succulent) responded differently to kraaling. Density and diversity of succulent and non-succulent shrubs decreased, while annual and perennial grass cover inside and outside kraaling areas did not differ. Foliar nitrogen was greater inside kraals. Both succulent and non-succulent shrub cover increased over time after kraaling irrespective of the rainfall. Our study demonstrates that short-term intensive trampling and dunging creates nutrient-rich, heterogeneous patches that may enhance restoration of degraded production landscapes. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
48. Web spider abundance is affected by sheep farming in the Karoo§.
- Author
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Henschel, Joh R and Lubin, Yael
- Subjects
LIVESTOCK ,ARTHROPODA ,HERBIVORES ,BIODIVERSITY ,VEGETATION & climate ,VEGETATION management - Abstract
Impacts of livestock farming include effects on arthropods and a range of related ecological processes. Grazing by sheep may indirectly affect web spider populations by changing vegetation structures available for web construction, or directly by trampling the spiders or their webs. We tested these two potential impacts by surveying spiders along transects and found that web spider abundance was 52% lower in a sheep grazing area compared with inside the adjacent Tierberg-LTER (Long Term Ecological Research) sheep exclosure. This reduction in web-spider abundance could be due to the 10% lower shrub cover in the sheep pasture than in the exclosure. Further support for the hypothesis that web spider abundance is affected by shrub cover came from spider abundance being higher on densely vegetated mounds, termed heuweltjies, than in the surrounding shrub matrix in both the exclosure and the sheep pasture, with heuweltjies showing cross-fence differences, consistent with grazing impacts. In addition, there may be a direct effect of trampling, as suggested by experimental removal of webs. By depressing spider populations, sheep grazing may affect a number of ecological factors, such as trophic relationships or nutrient cycling. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
49. Reflections, applications and future directions of Long-Term Ecological Research at Tierberg§.
- Author
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Arena, Gina, van der Merwe, Helga, Todd, Simon W, Pauw, Marco J, Milton, Suzanne J, Dean, W Richard J, and Henschel, Joh R
- Subjects
ECOSYSTEM dynamics ,ECOLOGICAL research ,BIODIVERSITY research ,ECOLOGY simulation methods ,SUSTAINABLE development ,CLIMATE change ,SUSTAINABILITY - Abstract
Tierberg-LTER is a research site established in 1987 in the semi-arid Succulent Karoo near Prince Albert in the Western Cape province, South Africa. The original purpose for its establishment was to study ecosystem dynamics and the drivers of vegetation in the context of historical land use. The large body of work that has materialised from Tierberg-LTER is grounded on extensive baseline data and has greatly influenced the broader Karoo literature. It stands as the only long-term ecological research facility for the semi-arid region of South Africa. The Karoo environment faces several new developments centred largely on the expanding energy sector. Under a changing climate, ecosystems will have to further adapt to the impacts of such developments. The future research programme for Tierberg-LTER will accordingly continue to focus on understanding Karoo ecosystem dynamics and drivers of climate and anthropogenic change at local scales, thereby informing management and mitigation of future development impacts. Among a growing network of Karoo research sites, Tierberg-LTER maintains a unique role for long-term and intensive research that will contribute significantly towards the South African Environmental Observation Network’s vision of furthering ecosystem integrity, societal prosperity and sustainable development. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
50. Locust times – monitoring populations and outbreak controls in relation to Karoo natural capital
- Author
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Henschel, Joh R., primary
- Published
- 2015
- Full Text
- View/download PDF
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