2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/05/2017 | 11:45 AM - 12:00 PM | LONG-TERM IMPACTS OF CACTHMENT CHANGE HISTORY ON NEOTROPICAL METACOMMUNITIES: IMPLICATIONS FOR STREAM RESTORATION | 305A
LONG-TERM IMPACTS OF CACTHMENT CHANGE HISTORY ON NEOTROPICAL METACOMMUNITIES: IMPLICATIONS FOR STREAM RESTORATION
Metacommunity theory suggests that effective re-colonization and maintenance of viable populations in restored streams require active pathways to a source of colonists. Although there has been advance in metacommunity and stream restoration research recently, observational studies still fail to explain large amounts of variation in metacommunities. One underappreciated concept that needs to be integrated to this filed is historical contingency, as the order and timing of species arrival during community assembly might influence community structure. However, such data is hard to get. But, if what happens in the stream is partly a consequence of the surrounding catchment, then contemporary communities may still respond to characteristics of past landscapes. I modern multivariate statistics to analyzed macroinvertebrate communities in watersheds differing in their land use history. I found that metacommunity structure was explained by a complex combination of local, spatial and land use history variables, but that an interaction between current vegetation cover and land use history was the best predictor. These results suggest that community responses to catchment changes might be delayed due to priority effects and persistent changes in dispersal events, which should matter when choosing streams to be restored.
- S09 The importance of environmental gradients for the advance of tropical stream ecology
- C11 Community Ecology
- S21 Practical applications of metacommunity theory in stream and river management
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Presenters/Authors
Tadeu Siqueira
(), Universidade Estadual Paulista - UNESP, Brazil, tsiqueira@rc.unesp.br;
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Edineusa Santos
(), Univerisdade Estadual Paulista (UNESP), edineusa86@gmail.com ;
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Anita Costa
(), Univerisdade Estadual Paulista (UNESP), anitavalentedacosta@gmail.com ;
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