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Relationships between riparian buffer widths and the effects of logging on stream habitat, invertebrate community composition and fish abundance
journal contribution
posted on 2023-05-16, 18:09 authored by Peter Davies, Nelson, MDImpacts from the logging of Eucalyptus forest on stream habitat, macroinvertebrate abundance and diversity, and fish abundance were surveyed in Tasmania, Australia. Forty-five pairs of sites from 34 streams of >2.5 km2 catchment area were each sampled once during summer in the period 1990-92. Each site pair consisted of an ‘impacted’ site downstream of a logging treatment and an upstream or closely matched ‘paired control’ site. Site pair treatments encompassed two logging methods (cable and conventional) with a range of riparian buffer strip widths (0-50 m) and included unlogged controls. Differences between site pair variables were used as test statistics for the detection of logging impacts. Logging significantly increased riffle sediment, length of open stream, periphytic algal cover, water temperature and snag volume. Logging also significantly decreased riffle macroinvertebrate abundance, particularly of stoneflies and leptophlebiid mayflies, and brown trout abundance. All effects of logging were dependent on buffer strip width and were not significantly affected by coupe slope, soil erodibility or time (over one to five years) since logging. All impacts of logging were significant only at buffer widths of <30 m. Minimum buffer widths for eliminating logging impacts on stream habitats and biota are discussed. © 1994 CSIRO.
History
Publication title
Australian Journal of Marine and Freshwater ResearchVolume
45Issue
7Pagination
1289-1305ISSN
0067-1940Department/School
School of Natural SciencesPublisher
CSIROPlace of publication
AustraliaRepository Status
- Restricted