Stream macroinvertebrate response to catchment urbanisation (Georgia, U.S.A.)

Freshwater Biology - Tập 48 Số 2 - Trang 329-346 - 2003
Allison H. Roy1, Amy D. Rosemond2, Michael J. Paul3,2, David S. Leigh4, J. Bruce Wallace1,2
1Department of Entomology, University of Georgia, Athens, GA 30602, U.S.A.
2Institute of Ecology, University of Georgia, Athens, GA 30602 U.S.A.
3Current address: Tetra Tech, Inc., 10045 Red Run Blvd #110, Owings Mills, MD 21117, U.S.A.
4Department of Geography, University of Georgia, Athens, GA 30602, U.S.A.

Tóm tắt

SUMMARY 1. The effects of catchment urbanisation on water quality were examined for 30 streams (stratified into 15, 50 and 100 km2 ± 25% catchments) in the Etowah River basin, Georgia, U.S.A. We examined relationships between land cover (implying cover and use) in these catchments (e.g. urban, forest and agriculture) and macroinvertebrate assemblage attributes using several previously published indices to summarise macroinvertebrate response. Based on a priori predictions as to mechanisms of biotic impairment under changing land cover, additional measurements were made to assess geomorphology, hydrology and chemistry in each stream.2. We found strong relationships between catchment land cover and stream biota. Taxon richness and other biotic indices that reflected good water quality were negatively related to urban land cover and positively related to forest land cover. Urban land cover alone explained 29–38% of the variation in some macroinvertebrate indices. Reduced water quality was detectable at c. >15% urban land cover.3. Urban land cover correlated with a number of geomorphic variables such as stream bed sediment size (–) and total suspended solids (+) as well as a number of water chemistry variables including nitrogen and phosphorus concentrations (+), specific conductance (+) and turbidity (+). Biotic indices were better predicted by these reach scale variables than single, catchment scale land cover variables. Multiple regression models explained 69% of variation in total taxon richness and 78% of the variation in the Invertebrate Community Index (ICI) using phi variability, specific conductance and depth, and riffle phi, specific conductance and phi variability, respectively.4. Indirect ordination analysis was used to describe assemblage and functional group changes among sites and corroborate which environmental variables were most important in driving differences in macroinvertebrate assemblages. The first axis in a non‐metric multidimensional scaling ordination was highly related to environmental variables (slope, specific conductance, phi variability; adj. R2=0.83) that were also important in our multiple regression models.5. Catchment urbanisation resulted in less diverse and more tolerant stream macroinvertebrate assemblages via increased sediment transport, reduced stream bed sediment size and increased solutes. The biotic indices that were most sensitive to environmental variation were taxon richness, EPT richness and the ICI. Our results were largely consistent over the range in basin size we tested.

Từ khóa


Tài liệu tham khảo

10.1046/j.1365-2427.1997.d01-546.x

10.1046/j.1365-2427.1997.00155.x

American Public Heath Association American Water Works Association and Water Pollution Control Federation(1989)Standard Methods for the Examination of Water and Wastewater 17th edn. Washington DC USA.

Benke A.C., 1981, Effects of Urbanization on Stream Ecosystems

10.1111/j.1752-1688.1997.tb04126.x

Brigham A.R., 1982, Aquatic Insects and Oligochaetes of North and South Carolina

10.2134/jeq1993.00472425002200030003x

10.1111/j.1752-1688.1986.tb01899.x

Georgia Environmental Protection Division (GA EPD, 1998, Coosa River Basin Management Plan 1998.

10.2307/1311607

10.1641/0006-3568(2000)050[0571:IATLTO]2.0.CO;2

10.1023/A:1005028803682

10.2307/1467832

10.1029/WR011i003p00431

10.1002/(SICI)1099-1646(199611)12:6<597::AID-RRR417>3.0.CO;2-R

10.1111/j.1752-1688.1987.tb00854.x

10.1126/science.201.4352.229

10.1111/j.1752-1688.1999.tb04186.x

10.2307/1942007

10.1023/A:1005903822990

10.1111/j.1752-1688.1979.tb01074.x

10.1007/s002679900184

Leigh D.S., 2001, Proceedings of the 2001 Georgia Water Resources Conference, 225

10.2307/1467463

10.1007/BF00021291

Lo C.P., 2000, Proceedings (in CD Form). Annual Meeting Held in Washington DC, May 22–26, 2000

10.2307/1309729

Merritt R.W., 1996, An Introduction to the Aquatic Insects of North America

10.1139/f94-183

Minshall G.W., 1984, The Ecology of Aquatic Insects, 358

Ohio Environmental Protection Agency (Ohio EPA, 1989, Biological Criteria for the Protection of Aquatic Life Vol I–III

10.1046/j.1365-2427.2000.00557.x

Paul M.J., 2001, Proceedings of the 2001 Georgia Water Resources Conference, 241

10.1146/annurev.ecolsys.32.081501.114040

10.2307/1939127

10.1130/0091-7613(2000)028<0079:CGRIPU>2.0.CO;2

10.1139/f96-006

Rosemond A.D., 2001, Proceedings of the 2001 Georgia Water Resources Conference, 237

10.1641/0006-3568(2000)050[0746:GSEEOH]2.0.CO;2

10.1007/BF02447513

RoyA.H.(2000)Macroinvertebrate Responses to Watershed Urbanization in the Etowah River basin Georgia.MSc Thesis the University of Georgia Athens GA USA.

Roy A.H., 2001, Proceedings of the 2001 Georgia Water Resources Conference, 229

10.2307/1311765

Stamey T.C., 1993, Techniques for Estimating Magnitude and Frequency of Floods in Rural Basins of Georgia

10.1111/j.1365-2427.1995.tb00405.x

10.1023/A:1003721509666

Trimble S.W., 1974, Man Induced Soil Erosion on the Southern Piedmont

10.1126/science.278.5342.1442

Walters D.M., 2001, Proceedings of the 2001 Georgia Water Resources Conference, 233

10.1577/1548-8446(1997)022<0006:IOWLUO>2.0.CO;2

10.4319/lo.1969.14.5.0813

Waters T.F., 1995, Sediment in Streams: Source, Biological Effects, and Control

10.1007/978-1-4757-4098-1

10.3138/9781442623606

10.1111/j.1752-1688.1977.tb02056.x

10.1007/s002679900019

Thông tin
Thông tin xuất bản

Freshwater Biology

Tập 48 Số 2

329-346

Thông tin tác giả