Journal ArticleDOI
Biodiversity-ecosystem function research: Insights gained from streams
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The extent to which stream ecology has contributed to biodiversity-ecosystem function (BEF) theory and empirical testing is addressed and it is shown that the relative importance of species number versus assemblage composition increases as the authors go towards higher trophic levels.Abstract:
In this review, we address the extent to which stream ecology has contributed to biodiversity-ecosystem function (BEF) theory and empirical testing. BEF research first targeted the implications of the ongoing loss of biodiversity for ecosystems and humans. Terrestrial ecology has played a leading role in this field, whereas the contribution of riverine science to the debate has been more limited. Nevertheless, a considerable merit of stream ecology has been to consider a wide range of ecological groups (riparian litter producers, aquatic micro-fungi, macroinvertebrates, and fishes). Through a meta-analysis of these unique data, we show that the relative importance of species number versus assemblage composition increases as we go towards higher trophic levels. Whether this pattern is general or specific to stream ecosystems needs to be evaluated through cross-ecosystem comparisons looking more closely at mechanistic processes. It is evident from stream studies that trophic and non-trophic (e.g. facilitation) interactions govern the functional consequences of biodiversity. These studies also indicate that richness-function relationships are altered by a multitude of factors, such as evenness, non-taxonomic diversity (genetic/phenotypic diversity), species extinction order, the environmental context, as well as experimental setups. This review highlights the relevance of stream ecology to BEF research. Copyright © 2009 John Wiley & Sons, Ltd.read more
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Prospects for sustaining freshwater biodiversity in the 21st century: linking ecosystem structure and function
TL;DR: In this paper, the authors argue that a higher proportion of freshwater species are threatened to extinction than their terrestrial or marine counterparts, due to the combined effects of multiple stressors such as pollution and habitat degradation, flow regulation, overfishing, and alien species.
Journal ArticleDOI
Fragmentation alters stream fish community structure in dendritic ecological networks
Joshuah S. Perkin,Keith B. Gido +1 more
TL;DR: The results indicate that the DCI is sensitive to community effects of fragmentation in riverscapes and might be used by managers to predict ecological responses to changes in habitat connectivity, and illustrate that relating structural connectivity of riverscape to functional connectivity among communities might aid in maintaining metacommunity dynamics and biodiversity in complex dendritic ecosystems.
Journal ArticleDOI
River flood plains are model ecosystems to test general hydrogeomorphic and ecological concepts
TL;DR: In this article, the authors studied the effects of environmental heterogeneity on ecosystem functioning and biodiversity in a flood plain and found that the capacity of a habitat to process matter depends on the productivity of adjacent patches and on the exchange among these patches.
Journal ArticleDOI
Functional diversity: a review of methodology and current knowledge in freshwater macroinvertebrate research
TL;DR: The review of current methodology for assessing functional diversity in freshwater macroinvertebrate research showed that most papers quantified functional diversity using biological traits, among which feeding habits were the most common traits probably due to the assumed links between feeding and ecosystem functions.
Journal ArticleDOI
Stream invertebrate productivity linked to forest subsidies: 37 stream‐years of reference and experimental data
TL;DR: Results from the artificial wood addition demonstrate that physical structure alone will not restore invertebrate productivity without detrital resources from the riparian forest, and show the necessity of maintaining and restoring aquatic-terrestrial linkages in forested headwater streams.
References
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