21 results on '"Ambientes costeros"'
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2. Protección ambiental antártica: limitaciones y desafíos del sistema de áreas protegidas.
- Author
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Díaz*, Martín Andrés
- Subjects
CLIMATE change ,MARINE parks & reserves ,BIODIVERSITY ,ENVIRONMENTAL protection ,PROTECTED areas ,TREATIES ,INTERNATIONAL agencies ,MARINE biodiversity ,BIODIVERSITY conservation - Abstract
Copyright of Ecología Política is the property of Fundacio ENT and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
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3. Diversity and distribution of the genus Hyalella (Crustacea: Amphipoda: Hyalellidae) in temporary wetlands from the southern Brazilian Coastal Plain, with a taxonomic key to the species in the region.
- Author
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Talhaferro, Jordan Tuparai, Pires, Mateus Marques, Stenert, Cristina, Maltchik, Leonardo, Bueno, Alessandra Angélica de Pádua, and Kotzian, Carla Bender
- Subjects
VERNAL pools ,AMPHIPODA ,COASTAL plains ,SPECIES distribution ,CRUSTACEA ,SPECIES ,SPECIES diversity - Abstract
The knowledge of the diversity and distribution of Hyalella species is scarce in the subtropical regions of Brazil. The present study investigated the diversity and distribution of Hyalella species in subtropical temporary wetlands in the southern Brazilian Coastal Plain. Six species were registered in the study region, including three new species of the genus. The spatial distribution of the species in the study region suggests that the hydrographic region (or freshwater ecoregion) is an important driver of the geographic distribution of the species. Thus, the present study increases to 19 the diversity of species with distribution in the southern region, with one new record for the state of Santa Catarina, one for the state of Rio Grande do Sul, and one for both states. We also expanded the distribution ranges of H. bonariensis, H. castroi, and H. kaingang. In addition, we elaborated a taxonomic key to the species of Hyalella known to southern Brazil. Thus, we demonstrate the need for more taxonomic studies to better understand the diversity of macroinvertebrates in Brazilian wetlands, in order to protect our fauna and contribute to the development of future conservation policies. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
4. SISTEMÁTICA DE MAMÍFEROS DE ARGENTINA: PATRONES, TENDENCIAS Y PERSPECTIVAS EN LA ACUMULACIÓN DE CONOCIMIENTOS.
- Author
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Teta, Pablo, Argoitia, Antonella, Barbero, Sofía, Campo, Denise H., d'Hiriart, Sofia, Troyelli, Adrián, Lucero, Sergio, and Cassini, Guillermo
- Abstract
Copyright of Journal of Neotropical Mammalogy / Mastozoología Neotropical is the property of Sociedad Argentina para el Estudio de los Mamiferos and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
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5. Benthic fauna associated with Loxechinus albus beds in Northwest Patagonia: spatial patterns and species archetypes.
- Author
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Contreras, Catalina, Niklitschek, Edwin, Molinet, Carlos, Díaz, Patricio, and Díaz, Manuel
- Abstract
The present study is a first characterization of benthic communities associated with the intensively-exploited sea urchin Loxechinus albus in Northwest Patagonia. Using video-transects, we sampled 22 L. albus beds, distributed among five sampling zones, defined by oceanographic criteria and geographic proximity. Species composition was characterized and compared among zones using Permutational analysis of variance (PERMANOVA), followed by multiple comparisons and distance-based redundancy analysis. In addition, we used species archetype models (SAMs) to identify and estimate the probability of presence of different groups of species (archetypes) that respond similarly to environmental variables. Most zones were characterized by one or two highly abundant taxa, with Corynactis, Arbacia dufresnii, Antholoba achates, and Pseudechinus magellanicus being the most abundant. Sampling zones were shown to have significant effects upon species composition, reflected in significant differences among most zones. The most informative SAM identified three archetypes and considered substrate effects, linear and quadratic effects of temperature and chlorophyll-a concentration, and linear effects of salinity. Probability of Archetype 1 decreased with latitude, particularly south of the Desertores Sill Constriction. Probability for Archetype 2 seemed related to both latitude and salinity. Archetype 3 presented low probabilities across the whole study area. Considering all results, we propose dividing the study area into three main zones: (1) an estuarine area north from Desertores Sill Constriction, (2) an oceanic area corresponding to the Gulf of Corcovado, the Outer Chonos Archipelago and northern sections of the Inner Chonos Archipelago, and (3) an estuarine area located at the southern section of the Inner Chonos Archipelago. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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6. ÍNDICE DE SENSIBILIDADE AMBIENTAL PARA DERRAMAMENTOS DE PETRÓLEO EM ZONAS MARINHAS E COSTEIRAS NA COLÔMBIA
- Author
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Gil-Agudelo, Diego L, Nieto-Bernal, Ramón-Alberto, Ibarra-Mojica, Diana-Marcela, Guevara-Vargas, Ana-María, and Gundlach, Erich
- Subjects
Permeabilidad ,Biodiversidade ,Oil spills ,Environmental sensitivity maps ,Geomorphology ,Biodiversity ,Permeability ,Biodiversidad ,Vazamentos de petróleo ,Permeabilidade ,Contingency plans ,Geomorfología ,Mapas de sensibilidad ambiental ,Recursos socioeconómicos ,Derrames de petróleo ,Planes de contingencia ,Geomorfologia ,Planos de contingência ,Socioeconomic resources ,Mapas de sensibilidade ambiental - Abstract
The implementation of tools to prevent and mitigate the potential impact of oil spills in marine and coastal environments is an issue of interest not only for oil and gas companies, but also for environmental authorities and the general society of the country as they seek to avoid possible damages to the natural realm and human-use resources of an area affected by these events. One of these tools that is useful both for planning and response of oil spills is the Environmental Sensitivity Index (ESI), which establishes the degree of sensitivity of different coastal areas depending on their geophysics, hydrodynamic and biological characteristics. ESI contributes and prioritize to improve response actions to minimize potential environmental impacts. This index is a key element for the construction of the Environmental Sensitivity Maps for oil spills (ESM), but for its correct application, it has to be adjusted to the needs and conditions of each country. This paper presents the adaptation of the ESI for Colombian coastal environments, which has been constructed through the revision of experiences in other countries and the collaboration of national and international experts during workshops. The ESI presented here is the main tool for the elaboration of ESM for Colombia, an instrument that will help in the planning and response process for oil spills in the country. La implementación de herramientas para prevenir y mitigar el potencial impacto de los derrames de hidrocarburos en ambientes costeros es un tema de interés no sólo para las compañías de gas y petróleo, sino también para autoridades ambientales y la sociedad en general, ya que ellos buscan evitar y prevenir daños en los ambientes naturales y los recursos de uso humano en áreas afectadas por estos eventos. Una de estas herramientas que es usada tanto para planear como para responder a derrames de hidrocarburos es el Índice de Sensibilidad Ambiental (ESI, de sus siglas en inglés), el cual establece el grado de sensibilidad de diferentes áreas costeras dependiendo de sus características geofísicas, hidrodinámicas y biológicas. El ESI contribuye a priorizar y mejorar las acciones de respuesta y así minimizar el potencial impacto ambiental de estos eventos. Este índice es un elemento clave para la construcción de los Mapas de Sensibilidad Ambiental ante derrames de hidrocarburos (ESM, de sus siglas en inglés), pero para su correcta aplicación deben ser ajustados a las necesidades y condiciones de cada país. Este artículo presenta la adaptación del ESI para los ambientes costeros colombianos, el cual ha sido construido mediante la revisión de experiencias de otros países y en colaboración con expertos nacionales e internacionales a través de talleres. El ESI presentado aquí es la herramienta fundamental para la elaboración de los ESM para Colombia, un instrumento que servirá en el proceso de planificación y respuestas a derrames de hidrocarburos en el país. A implantação de ferramentas de prevenção e mitigação do impacto potencial dos vazamentos de óleo em ambientes costeiros é uma questão de interesse não apenas para as companhias de gás e óleo, mas também para as autoridades ambientais e a sociedade em geral, sendo que eles procuram evitar e prevenir prejuízos nos ambientes naturais e nos recursos de uso humano nas áreas afetadas por estes eventos. Uma destas ferramentas, que é usada tanto para planejamento quanto para resposta em eventos de vazamento de óleo, é o Índice de Sensibilidade Ambiental (ESI, por suas siglas em inglês), que estabelece o grau de sensibilidade de diferentes áreas costeiras dependendo das características geofísicas, hidrodinâmicas e biológicas da área. O ESI contribui a priorizar e aprimorar as ações de resposta visando minimizar o potencial impacto ambiental destes eventos. Este índice é um elemento chave para a construção dos Mapas de Sensibilidade Ambiental perante derrames de óleo (ESM, por suas siglas em inglês), mas para sua aplicação correte é necessário se adaptar às necessidades e condições de cada país. Este trabalho apresenta a adaptação do ESI aos ambientes costeiros colombianos, sendo construído mediante a revisão de experiências de outros países e em colaboração com especialistas nacionais e internacionais através de oficinas. O ESI ora presentado é a ferramenta fundamental para a elaboração dos EMS para a Colômbia, um instrumento que servirá no processo de planejamento e resposta a vazamentos de óleo no país.
- Published
- 2015
7. Diversidad y conservación de los peces de la bahía de La Paz, Baja California Sur, México.
- Author
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González-Acosta, Adrián F., Balart, Eduardo F., Ruiz-Campos, Gorgonio, Espinosa-Pérez, Héctor, Cruz-Escalona, Víctor Hugo, and Hernández-López, Armando
- Abstract
Copyright of Revista Mexicana de Biodiversidad is the property of Universidad Nacional Autonoma de Mexico, Instituto de Biologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
- Full Text
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8. PRIMER REPORTE DE MICROGASTRÓPODOS (MOLLUSCA: GASTROPODA) ENCONTRADOS EN SEDIMENTOS CORALINOS DE LA LAGUNA DE YAPASCUA, ESTADO CARABOBO.
- Author
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ÁLVAREZ-BARCO, JULIA, BENÍTEZ, PAOLA, and NARCISO, SAMUEL
- Abstract
Copyright of Instituto Oceanografico de Venezuela (Boletin) is the property of Universidad de Oriente and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
9. Appendicularians and copepods from Scotia Bay (Laurie island, South Orkney, Antarctica): fluctuations in community structure and diversity in two contrasting, consecutive summers.
- Author
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Spinelli, Mariela L., Franzosi, Claudio, Olguin Salinas, Héctor, Capitanio, Fabiana L., and Alder, Viviana A.
- Subjects
BIODIVERSITY ,COPEPODA ,BIOLOGY ,ENTOMOSTRACA ,ECOLOGY - Abstract
Coastal Antarctic waters involve habitats of high primary and secondary production with a remarkable sensitivity to environmental changes on different spatio-temporal scales. The current study is the first comprehensive approach to the spatial distribution and the fluctuations in abundance, biomass, community structure, and diversity of the mesozooplankton from different habitats located in Scotia Bay in summers: 2014 and 2015, characterized by a different timing in seasonal sea ice retreat. Mean seawater temperature and abundances of calanoids, cyclopoids, nauplii, and appendicularians were one order of magnitude higher in summer 2014. Despite these environmental differences, biomass values of these groups proved similar for both summers. A total of ten species of copepods and one of appendicularians (
Fritillaria borealis) were identified. Oithonid copepods—O. similis , followed byO. frigida —represented the bulk of mesozooplankton abundances in both summers. The highest total mesozooplankton abundance (2111 ind m−3 ) and biomass (14075 µg C m−3 ) were found next to an Adélie penguin breeding area (2014), while the highest Shannon index values were found next to a glacier in both summers. Multivariate analyses based on species abundance showed two main groups of sites, one of them encompassing all summer 2014 samplings and the other comprising all summer 2015 samplings. The positive correlation betweenO. similis and the 2-10 μm Chl-a fraction suggests that summer 2014 represented optimal conditions—in terms of food—for the growth and development of this species. Experimental studies based on natural prey assemblages revealed thatO. similis feeds on flagellates rather than on diatoms. [ABSTRACT FROM AUTHOR]- Published
- 2018
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10. UNA HISTORIA DE ÉXITO: BIODIVERSIDAD A TRAVÉS DE FÓSILES.
- Author
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Cevallos-Ferriz, Sergio R. S. and Huerta Vergara, Alma R.
- Abstract
Copyright of TIP Revista Especializada en Ciencias Químico-Biológicas is the property of Universidad Nacional Autonoma de Mexico, Facultad de Estudios Superiores Zaragoza and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
- Full Text
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11. Primer registro de Berthellina ilisima (Gastropoda: Heterobranchia: Pleurobranchida) en aguas peruanas con descripción de su anatomía
- Author
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Mendivil, Alejandro and Cardoso, Franz
- Subjects
Perú ,Distribución ,Berthelina ,Peru ,Eastern Tropical Pacific Ocean (ETPO) ,Biodiversity ,Anatomy ,Distribution ,Anatomía ,Biodiversidad ,Océano Pacífico Oriental Tropical (OPTO) - Abstract
The Pleurobranchida are sea slugs that group around 100 species distributed in the seas worldwide, but with a greater diversity in tropical and temperate coastal environments. In the Eastern Pacific, 2 families, 4 genera and more than 10 species of Pleurobranchida have been reported. The species Berthellina ilisima Marcus & Marcus 1967 common in the Eastern Tropical Pacific Province is formally recorded in coastal waters of Tumbes, Peru. The anatomy of the digestive, circulatory, reproductive and nervous systems of B. ilisima is described, which constitutes the first description of the internal anatomy of a Pleurobranchida for Peru., Los Pleurobranchida son babosas marinas que agrupan alrededor de 100 especies distribuidas en los mares a nivel mundial, pero con una mayor diversidad en ambientes costeros tropicales y templados. En el Pacífico Oriental se han reportado 2 familias, 4 géneros y más de 10 especies de Pleurobranchida. La especie Berthellina ilisima Marcus & Marcus 1967 común en la Provincia del Pacifico Oriental Tropical se registra formalmente en aguas costeras de Tumbes, Perú. Se describe la anatomía de los sistemas digestivo, circulatorio, reproductor y nervioso de B. ilisima, el cual constituye la primera descripción de la anatomía interna de un Pleurobranchida para Perú.
- Published
- 2022
12. Benthic diversity and assemblage structure of a north Patagonian rocky shore: a monitoring legacy of the NaGISA project.
- Author
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Rechimont, M.E., Galván, D.E., Sueiro, M.C., Casas, G., Piriz, M.L., Diez, M.E., Primost, M., Zabala, M.S., Márquez, F., Brogger, M., Alfaya, J.E.F., and Bigatti, G.
- Abstract
The rocky shore of Punta Este, Golfo Nuevo (Patagonia, Argentina), was sampled by means of the standardized NaGISA (CoML) protocol, that was aimed to generate biodiversity baseline data in six levels, from high intertidal to 10 m depth. Based on the generated data, we analysed the benthic assemblage structure, species richness, mean abundance and the distribution pattern of invertebrate functional groups, typifying species in each intertidal and subtidal level. The intertidal sampled is exposed to extreme physical conditions higher than any other rocky shore system studied, with air temperature variation of 40°C during the year, maximum winds of 90 km/h and semidiurnal tides of 5 m amplitude; on the other hand subtidal presents less thermal variation (ΔT 10°C throughout the year) and more homogeneous physical conditions. We identified 64 taxa represented by six animal phyla: Mollusca, Arthropoda, Annelida (Polychaeta), Echinodermata, Cnidaria and Nemertea; and three algal phyla: Chlorophyta, Rhodophyta and Heterokontophyta (class: Phaeophyceae). Ordination non-metric multidimensional scaling plots showed three different assemblages in terms of species composition (intertidal, subtidal 1 m level and subtidal 5–10 m levels). The intertidal was represented by suspension feeders, mainly Mollusca. The tiny mussels Brachidontes rodriguezii and Brachidontes purpuratus, and the algae Corallina officinalis dominated the intertidal and promote positive interaction (amelioration), preventing other species from the extreme physical stress. The subtidal was mainly represented by grazers. Our results showed a tendency of suspension feeders to decrease and grazers and predators to increase from high intertidal to subtidal, probably driven by decreasing physical stress. The gastropod Tegula patagonica, the sea urchins Arbacia dufresnii and Pseudechinus magellanicus and the invasive algae Undaria pinnatifida were the most abundant species in 1 m–10 m levels. Based on previous work performed in the region, we hypothesize that the differences registered between intertidal and subtidal levels could be explained in part by an increase in physical stress at the intertidal, with low predation pressure that promotes positive interactions, while in the subtidal the increase in consumers and decrease of physical stress could lead to associational defences. Our results could be useful as baseline data to develop a sustainable network for long-term monitoring of benthic community changes due to anthropogenic activities. [ABSTRACT FROM PUBLISHER]
- Published
- 2013
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13. Macrocrustáceos incrustantes en el Parque Nacional Sistema Arrecifal Veracruzano: biodiversidad, abundancia y distribución.
- Author
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Winfield, Ignacio, Cházaro-Olvera, Sergio, Horta-Puga, Guillermo, Lozano-Aburto, Miguel Ángel, and Arenas-Fuentes, Virgilio
- Subjects
CRUSTACEA ,BIODIVERSITY ,POLLUTANTS ,REEFS ,GEOMORPHOLOGY - Abstract
Copyright of Revista Mexicana de Biodiversidad is the property of Universidad Nacional Autonoma de Mexico, Instituto de Biologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2010
- Full Text
- View/download PDF
14. Lycopodiella tupiana B. Ollg
- Author
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Arana, Marcelo D.
- Subjects
Lycopodiella tupiana ,Tracheophyta ,Lycopodiales ,Lycopodiopsida ,Lycopodiaceae ,Biodiversity ,Plantae ,Lycopodiella ,Taxonomy - Abstract
Lycopodiella tupiana (B. ��llg. & P. G. Windisch) B. ��llg. in Rodrigu��sia 63: 480. 2012. ��� Lycopodiella alopecuroides var. tupiana B. ��llg. & P. G. Windisch in Bradea 5: 30. 1987. Notas. ��� ROLLERI (2008) cita para Paraguay L. alopecuroides var. tupiana sobre la base del esp��cimen Krapovickas & al. 12539 (CTES!, LP!). Luego del an��lisis morfol��gico de esta colecci��n, se concluye que corresponde a Lycopodiella longipes, por lo que se excluye la presencia de L. tupiana en la flora de Paraguay. L. tupiana es una especie end��mica de ambientes costeros de Brasil y Uruguay, bien caracterizada en su ecolog��a y distribuci��n geogr��fica: formaciones de campo h��medas o estacionalmente inundadas desde el litoral del estado de Sao Paulo (Brasil) hasta Uruguay, en planicies costeras (ARANA & ��LLGAARD, 2012)., Published as part of Arana, Marcelo D., 2018, Sin��nimos nuevos, tipificaciones y especies excluidas en la familia Lycopodiaceae de la flora del Paraguay, pp. 245-248 in Candollea 73 (2) on page 247, DOI: 10.15553/c2018v732a8, http://zenodo.org/record/5724609, {"references":["ROLLERI, C. (2008). Lycopodiaceae. In: ZULOAGA, F. O., O. MORRONE & M. J. BELGRANO (ed.), Catalogo de las plantas vasculares del Cono Sur (Argentina, Sur de Brasil, Chile, Paraguay y Uruguay). Monogr. Syst. Bot. Missouri Bot. Gard. 107: 84 - 96."]}
- Published
- 2018
- Full Text
- View/download PDF
15. Respuesta de la meiofauna al pisoteo humano en los arrecifes de coral
- Author
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Paulo J. P. Santos, Aliny F. S. Barreto, and Visnu Cunha Sarmento
- Subjects
perturbación del ecosistema ,Meiobenthos ,Biodiversity ,SH1-691 ,habitat ,Aquatic Science ,Oceanography ,ecosystem disturbance ,lcsh:Aquaculture. Fisheries. Angling ,algas ,acción antropogénica ,Aquaculture. Fisheries. Angling ,hábitat ,Reef ,algae ,lcsh:SH1-691 ,Biomass (ecology) ,geography.geographical_feature_category ,bentos ,Ecology ,man-induced effects ,benthos ,Coral reef ,Food web ,Fishery ,Geography ,Disturbance (ecology) ,turismo ,tourism ,arrecifes de coral ,Trampling ,coral reefs - Abstract
Coastal environments are trampled by humans worldwide; however, there are few studies that evaluate the effect of trampling on the meiofauna of hard substrates, and none on meiofauna of reef environments. We investigated the effects of trampling due to tourism on the meiofauna of reef formations on the northeastern coast of Brazil. Samples were taken from five paired stations located in two areas on the reef: an area protected since 2004, and an area open to tourist visits. Trampling caused important changes in the meiofaunal assemblage. The densities of the total meiofauna and of the commonest groups were negatively affected in the trampled area. Among the major groups, Polychaeta proved to be very sensitive to this disturbance. The meiofauna groups showed different response patterns to trampling depending on the species of algae trampled. Reductions in animal densities were partly attributed to the loss of turf biomass and associated sand caused by trampling, and partly to the direct effect of people stepping on the animals. Considering the importance of meiofauna in the food web as well as its biodiversity, these results highlight the possible negative effects of human trampling on the ecological and economic “services” that coral reefs provide. Los ambientes costeros están sometidos a la frecuentación humana en todo el mundo. Sin embargo, los estudios que evalúan el efecto de la frecuentación sobre la meiofauna de sustratos duros son raros, y sobre la meiofauna de los ambientes arrecifales son inexistentes. Se investigaron los efectos de la frecuentación relacionados con el turismo en la meiofauna de formaciones de arrecifes costeros en la región nordeste de Brasil. Fueron recogidas muestras de cinco pares de estaciones ubicadas en dos zonas en el arrecife: un área protegida desde 2004, y un área abierta a las visitas de turistas. La frecuentación provocó cambios importantes en la comunidad de la meiofauna. Las densidades de la meiofauna total y de los grupos más frecuentes fueron afectadas negativamente en la zona pisoteada. Entre los grupos principales, la clase Polychaeta demostró ser muy sensible a esta perturbación. Los grupos de la meiofauna mostraron diferentes padrones de respuesta al pisoteo dependiendo de la especie de alga pisoteada. Las reducciones en la densidad de animales se debieron en parte a la pérdida de biomasa de algas y sedimento asociado causada por el pisoteo, y en parte al efecto directo del pisoteo sobre los animales. Considerando la importancia de la meiofauna en la cadena alimentaria y su biodiversidad, estos resultados llaman la atención sobre los posibles efectos negativos de la frecuentación humana en los “servicios” ecológicos y económicos que proporcionan los arrecifes.
- Published
- 2011
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16. Interaction between fire and fragmentation in the successional stages of coastal dune grasslands of the southern Pampas, Argentina.
- Author
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Yezzi, Alejandra L., Nebbia, Ana J., and Zalba, Sergio M.
- Subjects
FRAGMENTATION reactions ,BIOLOGICAL invasions ,PLANT species ,BIODIVERSITY ,INTERMEDIATES (Chemistry) - Abstract
Vegetation's increased vulnerability to extrinsic disturbances is an important but less studied effect of natural habitat fragmentation. Fire is part of the evolutionary history of grassland ecosystems, but fragmentation by forest plantations can alter the fire regime and influence their resilience. This study compares the successional trajectories after fire in continuous and fragmented grassland in terms of composition and abundance of plant species. Grassland fragments of varying sizes (0.1 to 2.5 ha) surrounded by a forest matrix and grassland controls of an equivalent area in adjacent, non-fragmented sites were selected. Fire was associated with an increase in the abundance of exotic plants in the fragmented grassland whereas the continuous grasslands were much more resistant to invasion. These differences in the species composition between fragments and continuous areas, which were limited to the smaller areas before the fire, were observed one year after the fire throughout the range of sizes analyzed. These results show the impact of fragmentation on grassland resilience and how the effects of this process become evident even months after a disturbance, highlighting the synergistic effect of habitat fragmentation and biological invasions, two factors identified as the main forces of biodiversity erosion. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
17. InBUy database of Invasive and Alien Species (IAS) in Uruguay: a useful tool to confront this threat to biodiversity
- Author
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Silvana Masciadri, Pablo Muniz, and Ernesto Brugnoli
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Database ,business.industry ,prevención ,biological invasions ,Biodiversity ,Distribution (economics) ,area of origin ,especies exóticas ,Introduced species ,alien species ,Biology ,computer.software_genre ,Invasive species ,Indigenous ,cause of introduction ,origen geográfico ,causa de introducción ,prevention ,invasiones biológicas ,Species richness ,Taxonomic rank ,business ,computer ,Global biodiversity - Abstract
In Uruguay, as well as in other regions of the world, IAS cause negative impacts on natural and managed ecosystems. The use of databases is a helpful tool to elaborate different strategies for prevention and control, and to develop policies and scientific analyses related to IAS. The database of IAS in Uruguay (InBUy) was developed during two time periods (2006-2007 and 2009-2010). It currently contains information on 33 specialists of different taxonomic groups, 14 research projects, 185 references, 351 species and 4,715 records, with vascular plants having both the highest number of species and records. Among vascular plants, herbaceous life forms are the most strongly represented, followed by trees and shrubs. Within animals, the fishes and mollusks are the most important groups. Analysis of the native distribution areas of IAS showed that most are indigenous from Europe, followed by Asia and Oceania. Data showed that introductions of IAS into Uruguay are mainly intentional (67%), so efforts should be focused on policies and rules in order to control the entrance of exotic organisms and prevent new invasions. The geography of the compiled dataset shows the main impact is along the coastline, where the highest exotic species richness and records occurs, and also the most biological invasions. The InBUy database is up-to-date and has successfully contributed to the creation of an official IAS list for Uruguay and both a National and a Coastal Geographic Information System. It has also been used for developing consciousness about this important threat to biodiversity, at both national and regional scales. En Uruguay, al igual que en otras partes del mundo, las EEI han causado impactos negativos sobre los sistemas naturales y productivos. El uso de bases de datos a nivel mundial es una herramienta útil para elaborar estrategias de prevención y control, y para desarrollar políticas y análisis científicos en relación a las EEI. La base de datos de EEI en Uruguay (InBUy) fue desarrollada durante dos períodos (2006-2007 y 2009-2010). Actualmente contiene información de 33 especialistas de diferentes grupos taxonómicos, 14 proyectos de investigación, 185 referencias bibliográficas, 351 especies y 4715 registros, donde las plantas vasculares presentan el mayor número de especies y registros. Entre las plantas vasculares, las herbáceas son la forma de vida más representada, seguida por árboles y arbustos. Dentro de los animales, los peces y moluscos son los grupos más importantes. El origen geográfico de las EEI muestra que la mayoría son nativas de Europa, seguido por Asia y Oceanía. Los datos recabados muestran que la introducción de EEI a Uruguay es mayormente intencional (67%), por tanto los esfuerzos deberían ser focalizados en políticas y reglamentaciones para controlar el ingreso de organismos exóticos y prevenir nuevas invasiones biológicas. Por otra parte, los datos muestran un impacto mayor sobre los ambientes costeros, donde fue registrado el mayor número de especies y registros, así como el mayor número de invasiones biológicas. Hasta la fecha, la base de datos InBUy ha contribuido exitosamente en la conformación de una lista oficial de EEI para Uruguay, y en la construcción de un Sistema Geográfico de Información Nacional y Costero. Asimismo, ha contribuido a la concientización a través de políticas de divulgación acerca de esta importante amenaza sobre la conservación de la biodiversidad, tanto a escala nacional como regional.
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- 2010
18. A monographic catalogue on the systematics and phylogeny of the South American iguanian lizard family Liolaemidae (Squamata, Iguania)
- Author
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J. Alejandro Scolaro, Piotra Sura, and Daniel Pincheira-Donoso
- Subjects
Systematics ,Reptilia ,Squamata ,PHYLOGENY ,Zoology ,Liolaemidae ,Phymaturus ,Anolis ,Ciencias Biológicas ,Animalia ,Ctenoblepharys ,Iguania ,Chordata ,Ecology, Evolution, Behavior and Systematics ,Taxonomy ,biology ,Ecology ,Biodiversity ,Liolaemus ,TAXONOMY ,Ecología ,biology.organism_classification ,PATAGONIA ,LIOLAEMIDAE ,Animal Science and Zoology ,CIENCIAS NATURALES Y EXACTAS - Abstract
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(1980d) New endemic iguanid lizards from the Famatina Mountains of western Argentina. Journal of Herpetology, 14, 57-64.", "Cei, J.M. (1981) Liolaemus pseudoanomalus a substitute name for Liolaemus marmoratus (Burmeister 1861). Journal of Herpetology, 15, 253-254.", "Cei, J.M. (1982a) A new endemic lizard from Sierra Pie de Palo in western Argentina. Journal of Herpetology, 16, 179- 182.", "Cei, J.M. (1982b) Aspetti geo-biogeografici inediti della Sierra di Famatina, il piu elevato massiccio d'America del Sud dopo le cordigliere andine (Argentina centro-occidentale). Rivista Bimestrale dell'Instituto Geografico Militare di Firenze, 62, 643-672.", "Cei, J.M. (1982c) Reliquias y refugios, al sur del tropico, de la herpetofauna austral pleistocenica sudamericana. Actas VII Congreso Latinamericano, Zoologia, Merida, Venezuela, 1982, 213-221.", "Cei, J.M. (1983) Una nueva subespecie de Liolaemus anomalus de la region arida halofila de Salinas Grandes (Provincia de C
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- 2008
19. The Bahía Blanca Estuary : Ecology and Biodiversity
- Author
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Sandra M. Fiori, Paula D. Pratolongo, Sandra M. Fiori, and Paula D. Pratolongo
- Subjects
- Freshwater ecology, Marine ecology, Animal culture, Plants—Evolution, Conservation biology, Ecology, Biodiversity
- Abstract
The Bahía Blanca Estuary is one of the largest coastal systems in Atlantic South America. This mesotidal estuary, situated in a sharp transition between humid subtropical and semiarid climates, has a unique combination of large interannual climatic variations. The estuarine area encompasses roughly 2300 square kilometers and is composed of wide expanses of intertidal flats, salt marshes, and emerged islands, which create intricate landscape patterns. Natural environments in the estuary sustain a high concentration of marine and terrestrial species, including endemic, threatened, and endangered fish and shorebirds. Puerto Cuatreros, in the inner zone of the estuary, hosts a permanent marine research station, whose records span more than 30 years of biophysical variables, and represent one of the largest time series of ecological data in South America. Beyond its ecological relevance, the Bahía Blanca Estuary is under increasing anthropogenic pressure from large urban settlements, industrial developments and harbors, raising the question of how to balance conservation and development. The Bahía Blanca Estuary: Ecology and Biodiversity offers a comprehensive review of life in the ecosystems of the estuary. The book is divided into five major sections, the first of which provides a description of the regional setting and covers key aspects of estuarine dynamics. The three following sections are dedicated to different habitat types and, within each section, the chapters are organized around major functional groups from pelagic and benthic environments. The fifth and final section covers issues related to management and conservation. Overall, the book provides essential and up-to-date reference material on the biodiversity and ecosystem processes of the Bahía Blanca Estuary, and will appeal to a broad international audience.
- Published
- 2021
20. Mexican Aquatic Environments : A General View From Hydrobiology to Fisheries
- Author
-
Ana Laura Ibáñez and Ana Laura Ibáñez
- Subjects
- Fisheries--Mexico, Biodiversity, Water-supply--Mexico--Management, Ecosystem management--Mexico, Biodiversity--Mexico
- Abstract
Pursuing a multidisciplinary approach, this book highlights current challenges in, and potential solutions to, environmental water management in Mexico. It includes an essential review of current literature and state of the art research, providing a one-stop resource for researchers, graduate students and environmental water managers alike. The result of a cooperation between 35 researchers from seven Mexican academic institutions, two Federal Commissions and one international organization, the book links science to practice for living organisms and their environment, while also addressing anthropogenic effects on our water ecosystems. Particularly the book addresses the following subjects: Biodiversity in inland waters, physical and chemical characterization of inland waters, physico-chemical characterization of Mexican coastal lagoons, microbiota in brackish ecosystems, diversity associated with southern Mexico's pacific coral reefs, fry fish stockings in aquaticepicontinental systems, a review of tuna fisheries in Mexico, fishery resource management challenges stemming from climate change, aquatic invasive alien species, harmful algal blooms, and aquatic protected areas, related ecological and social problems and the importance for fisheries'yield.
- Published
- 2019
21. Introduced and native species on rocky shore macroalgal assemblages: Zonation patterns, composition and diversity.
- Author
-
Raffo, María P., Lo Russo, Virginia, and Schwindt, Evangelina
- Subjects
- *
ALGAE , *BIODIVERSITY , *ALGAL communities , *PLANT species , *NATIVE plants , *INTRODUCED plants , *BOTANY - Abstract
Highlights: [•] Abundance, richness and algal diversity were variable among seasons and localities. [•] Richness of introduced macroalgae species represented around 20 and 25% of the total richness. [•] Highest diversity was found in localities with greater abundance of introduced species. [•] Five cryptogenic and introduced macroalgae species represent new records for Argentina. [•] Diversity of introduced algae species in Patagonian rocky shores had been underestimated. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
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