The relative influence of catchment and site variables on fish and macroinvertebrate richness in cerrado biome streams Public Deposited

http://ir.library.oregonstate.edu/concern/articles/zg64tn668

To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by Springer and can be found at:  http://link.springer.com/journal/10980.

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  • Landscape and site-scale data analyses aid the interpretation of biological data and thereby help us develop more cost-effective natural resource management strategies. Our study focused on environmental influences on stream assemblages and we evaluated how three classes of environmental variables (geophysical landscape, land use and cover, and site habitat), influence fish and macroinvertebrate assemblage richness in the Brazilian Cerrado biome. We analyzed our data through use of multiple linear regression (MLR) models using the three classes of predictor variables alone and in combination. The four MLR models explained dissimilar amounts of benthic macroinvertebrate taxa richness (geophysical landscape R² ≈ 35%, land use and cover R² ≈ 28%, site habitat R² ≈ 36%, and combined R² ≈ 51%). For fish assemblages, geophysical landscape, land use and cover, site habitat, and combined models explained R² ≈ 28%, R² ≈ 10%, R² ≈ 31%, and R² ≈ 47% of the variability in fish species richness, respectively. We conclude that (1) environmental variables differed in the degree to which they explain assemblage richness, (2) the amounts of variance in assemblage richness explained by geophysical landscape and site habitat were similar, (3) the variables explained more variability in macroinvertebrate taxa richness than in fish species richness, and (4) all three classes of environmental variables studied were useful for explaining assemblage richness in Cerrado headwater streams. These results help us to understand the drivers of assemblage patterns at regional scales in tropical areas.
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  • Macedo, D. R., Hughes, R. M., Ligeiro, R., Ferreira, W. R., Castro, M. A., Junqueira, N. T., ... & Callisto, M. (2014). The relative influence of catchment and site variables on fish and macroinvertebrate richness in cerrado biome streams. Landscape Ecology, 29(6), 1001-1016. doi:10.1007/s10980-014-0036-9
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  • description.provenance : Approved for entry into archive by Erin Clark(erin.clark@oregonstate.edu) on 2014-08-05T18:56:54Z (GMT) No. of bitstreams: 1 HughesRobertFisheriesWildlifeRelativeInfluenceCatchment.pdf: 1001529 bytes, checksum: da03612d024e075f050e4c8dfd5b9760 (MD5)
  • description.provenance : Submitted by Erin Clark (erin.clark@oregonstate.edu) on 2014-08-05T18:56:39Z No. of bitstreams: 1 HughesRobertFisheriesWildlifeRelativeInfluenceCatchment.pdf: 1001529 bytes, checksum: da03612d024e075f050e4c8dfd5b9760 (MD5)
  • description.provenance : Made available in DSpace on 2014-08-05T18:56:54Z (GMT). No. of bitstreams: 1 HughesRobertFisheriesWildlifeRelativeInfluenceCatchment.pdf: 1001529 bytes, checksum: da03612d024e075f050e4c8dfd5b9760 (MD5) Previous issue date: 2014-07

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