Using geophysical information to define benthic habitats in a large river

Publication Type  Journal Article
Year of Publication  2006
Authors  Strayer, D. L.; Malcom, H. M.; Bell, R. E.; Carbotte, S. M.; Nitsche, F. O.
Journal Title  Freshwater Biology
Volume  51
Issue  1
Pages  25-38
Journal Date  Jan
ISBN Number  0046-5070
Accession Number  ISI:000233834400003
Key Words  heterogeneity; hudson river; patchiness; zoobenthos; mussel dreissena-polymorpha; tidal fresh-water; hierarchical approach; community structure; hudson river; stream; flow; assemblages; macroinvertebrates; patterns

1. Most attempts to describe the distribution of benthic macroinvertebrates in large rivers have used local (grab-scale) assessments of environmental conditions, and have had limited ability to account for spatial variation in macroinvertebrate populations.2. We tested the ability of a habitat classification system based on multibeam bathymetry, side-scan sonar, and chirp sub-bottom seismics to identify large-scale habitat units ('facies') and account for macroinvertebrate distribution in the Hudson River, a large tidal river in eastern New York.3. Partial linear regression analysis showed that sediment facies were generally more effective than local or positional variables in explaining various aspects of the macroinvertebrate community (community structure, density of all invertebrates, density of fish forage, density of a pest species - Dreissena polymorpha).4. Large-scale habitats may be effective at explaining macroinvertebrate distributions in large rivers because they are integrative and describe habitat at the spatial scales of dominant controlling processes.


991SQTimes Cited:1Cited References Count:54

URL  <Go to ISI>://000233834400003
DOI  DOI 10.1111/j.1365-2427.2005.01472.x