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Water 2016, 8(2), 36; doi:10.3390/w8020036

The Importance of Providing Multiple-Channel Sections in Dredging Activities to Improve Fish Habitat Environments

Department of Hydraulic and Ocean Engineering, National Cheng Kung University, No. 1 University Road, Tainan 701, Taiwan
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Academic Editor: John S. Schwartz
Received: 19 October 2015 / Revised: 21 December 2015 / Accepted: 14 January 2016 / Published: 22 January 2016
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Abstract

After Typhoon Morakot, dredging engineering was conducted while taking the safety of humans and structures into consideration, but partial stream reaches were formed in the multiple-channel sections in Cishan Stream because of anthropogenic and natural influences. This study mainly explores the distribution of each fish species in both the multiple- and single-channel sections in the Cishan Stream. Parts of the environments did not exhibit significant differences according to a one-way ANOVA comparing the multiple- and single-channel sections, but certain areas of the multiple-channel sections had more diverse habitats. Each fish species was widely distributed by non-metric multidimensional scaling in the multiple-channel sections as compared to those in the single-channel sections. In addition, according to the principal component analysis, each fish species has a preferred environment, and all of them have a wide choice of habitat environments in the multiple-channel sections. Finally, the existence of multiple-channel sections could significantly affect the existence of the fish species under consideration in this study. However, no environmental factors were found to have an influence on fish species in the single-channel sections, with the exception of Rhinogobius nantaiensis. The results show that providing multiple-channel sections in dredging activities could improve fish habitat environments. View Full-Text
Keywords: multiple-channel section; dredging engineering; habitat characterization; habitat use; binary logistic regression multiple-channel section; dredging engineering; habitat characterization; habitat use; binary logistic regression
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. (CC BY 4.0).

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Chiu, H.-P.; Suen, J.-P. The Importance of Providing Multiple-Channel Sections in Dredging Activities to Improve Fish Habitat Environments. Water 2016, 8, 36.

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