Influences of habitat and land cover on fish distributions along a tributary to Lake Ontario,New York |
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Authors: | Nuanchan Singkran Marcia S Meixler |
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Institution: | (1) Department of Natural Resources, Cornell University, 105 Rice Hall, Ithaca, NY 14853, USA;(2) Present address: Pollution Control Department, Ministry of Natural Resources and Environment, 92 Phaholyothin 7, Phayathai, Bangkok, 10400, Thailand |
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Abstract: | Influences of habitat and land cover on fish distributions were determined along a lentic–lotic gradient along a tributary
to Lake Ontario, New York. Nonmetric multidimensional scaling, cluster analysis, and specific characterization methods were
used to classify the fish species into five groups based on their similar patterns of distribution, species-specific habitat
relationship, and relative abundance observed along the gradient. A stepwise regression approach was used to select the best
habitat and land cover variables to explain variations in the distribution pattern of each fish group. Distribution patterns
of the five fish groups were significantly explained by either a set of the selected habitat or land cover predictor variables
or a combination of both. Of the 10 habitat variables, water depth, current velocity, aquatic plants, algae, woody debris,
sand, and rock-bedrock were selected to explain the variations in distribution patterns of one or more fish groups. Of the
16 land cover types, evergreen wetlands, evergreen plantations, successional shrubs, shrub swamps, roads, and urban areas
were selected to explain the variations in distribution patterns of at least one fish group. |
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Keywords: | Lentic– lotic Land use Freshwater Aquatic ecosystem Nonmetric multidimensional scaling Cluster analysis Stepwise regression |
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