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Int. J. Environ. Res. Public Health 2012, 9(10), 3629-3653; doi:10.3390/ijerph9103629
Article

Response of Fish Communities to Various Environmental Variables across Multiple Spatial Scales

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Received: 11 September 2012; in revised form: 2 October 2012 / Accepted: 6 October 2012 / Published: 15 October 2012
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Abstract: A better understanding of the relative importance of different spatial scale determinants on fish communities will eventually increase the accuracy and precision of their bioassessments. Many studies have described the influence of environmental variables on fish communities on multiple spatial scales. However, there is very limited information available on this topic for the East Asian monsoon region, including Korea. In this study, we evaluated the relationship between fish communities and environmental variables at multiple spatial scales using self-organizing map (SOM), random forest, and theoretical path models. The SOM explored differences among fish communities, reflecting environmental gradients, such as a longitudinal gradient from upstream to downstream, and differences in land cover types and water quality. The random forest model for predicting fish community patterns that used all 14 environmental variables was more powerful than a model using any single variable or other combination of environmental variables, and the random forest model was effective at predicting the occurrence of species and evaluating the contribution of environmental variables to that prediction. The theoretical path model described the responses of different species to their environment at multiple spatial scales, showing the importance of altitude, forest, and water quality factors to fish assemblages.
Keywords: fish assemblage; community patterns; prediction; multiple spatial scales; self-organizing map; random forest; theoretical path model; indicator species fish assemblage; community patterns; prediction; multiple spatial scales; self-organizing map; random forest; theoretical path model; indicator species
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Kwon, Y.-S.; Li, F.; Chung, N.; Bae, M.-J.; Hwang, S.-J.; Byoen, M.-S.; Park, S.-J.; Park, Y.-S. Response of Fish Communities to Various Environmental Variables across Multiple Spatial Scales. Int. J. Environ. Res. Public Health 2012, 9, 3629-3653.

AMA Style

Kwon Y-S, Li F, Chung N, Bae M-J, Hwang S-J, Byoen M-S, Park S-J, Park Y-S. Response of Fish Communities to Various Environmental Variables across Multiple Spatial Scales. International Journal of Environmental Research and Public Health. 2012; 9(10):3629-3653.

Chicago/Turabian Style

Kwon, Yong-Su; Li, Fengqing; Chung, Namil; Bae, Mi-Jung; Hwang, Soon-Jin; Byoen, Myeong-Seop; Park, Sang-Jung; Park, Young-Seuk. 2012. "Response of Fish Communities to Various Environmental Variables across Multiple Spatial Scales." Int. J. Environ. Res. Public Health 9, no. 10: 3629-3653.


Int. J. Environ. Res. Public Health EISSN 1660-4601 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert