Macroinvertebrate diversity in headwater streams: a review

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Title Macroinvertebrate diversity in headwater streams: a review
Author Clarke, Amber; Nally, Ralph Mac; Bond, Nick; Lake, P. S.
Journal Name Freshwater Biology
Year Published 2008
Place of publication United Kingdom
Publisher Wiley-Blackwell Publishing Ltd.
Abstract 1. Headwater streams are ubiquitous in the landscape and are important sources of water, sediments and biota for downstream reaches. They are critical sites for organic matter processing and nutrient cycling, and may be vital for maintaining the 'health' of whole river networks. 2. Macroinvertebrates are an important component of biodiversity in stream ecosystems and studies of macroinvertebrate diversity in headwater streams have mostly viewed stream systems as linear reaches rather than as networks, although the latter may be more appropriate to the study of diversity patterns in headwater systems. 3. Studies of macroinvertebrate diversity in headwater streams from around the world illustrated that taxonomic richness is highly variable among continents and regions, and studies addressing longitudinal changes in taxonomic richness of macroinvertebrates generally found highest richness in mid-order streams. 4. When stream systems are viewed as networks at the landscape-scale, α-diversity may be low in individual headwater streams but high β-diversity among headwater streams within catchments and among catchments may generate high γ-diversity. 5. Differing ability and opportunity for dispersal of macroinvertebrates, great physical habitat heterogeneity in headwater streams, and a wide range in local environmental conditions may all contribute to high β-diversity among headwater streams both within and among catchments. 6. Moving beyond linear conceptual models of stream ecosystems to consider the role that spatial structure of river networks might play in determining diversity patterns at the landscape scale is a promising avenue for future research.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1111/j.1365-2427.2008.02041.x
Volume 53
Issue Number 9
Page from 1707
Page to 1721
ISSN 1365-2427
Date Accessioned 2011-08-30
Language en_AU
Research Centre Australian Rivers Institute
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Environmental Monitoring
URI http://hdl.handle.net/10072/40886
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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