|
|
|
|
| |
|
|
Teresa,Fabrício Barreto; Souza,Luzia Shirlei de; Silva,Dianne Michelle Alves da; Barbosa,Hugo de Oliveira; Lima,Jane Dilvana; Nabout,João Carlos. |
ABSTRACT Riffles are unique habitats regarding to assemblage structure. However, understanding how these assemblages respond to environmental variations in small spatial extents, as within a stream, is a challenge. We assess whether the quantitative structure and the trophic composition of fish assemblages vary predictably among stream riffles. We predict that the variation of environmental conditions will explain species abundance and trophic composition, with the latter presenting higher predictive power, since species would be filtered according to their traits (e.g. diet). Moreover, we expect that the low among-riffle dispersal limitation within a stream and the strong habitat filtering would result in lower importance of spatial variables in the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental filters; Mass effect; Mesohabitat; Metacommunity; Trophic composition. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000300206 |
| |
|
| |
|
| |
|
|
Cordes, Erik E.; Cunha, Marina R.; Galeron, Joelle; Mora, Camilo; Olu-le Roy, Karine; Sibuet, Myriam; Van Gaever, Saskia; Vanreusel, Ann; Levin, Lisa A.. |
Cold seeps are among the most heterogeneous of all continental margin habitats. Abiotic Sources of heterogeneity in these systems include local variability in fluid flow, geochemistry, and substrate type, which give rise to different sets of microbial communities, microbial symbiont-bearing foundation species, and associated heterotrophic species. Biogenic habitats created by microbial mats and the symbiotic species including vesicomyid clams, bathymodiolin mussels, and siboglinid tubeworms add an additional layer of complexity to seep habitats. These forms of habitat heterogeneity result in a variety of macrofaunal and meiofaunal communities that respond to changes in structural complexity, habitat geochemistry, nutrient sources, and interspecific... |
Tipo: Text |
Palavras-chave: Beta diversity; Chemosynthetic communities; Cold seep; Continental margin; Macrofauna; Meiofauna; Metacommunity; Species accumulation. |
Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00002/11281/7826.pdf |
| |
|
|
|