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Huang, W., Yano, S., Zhang, J.M., Wang, Y.R.. (1392). Spatial and Temporal Variation in Stable Isotopes Signatures of Periphyton and an Endangered fish in a flow-reduced River Reach. , 7(3), 533-538. doi: 10.22059/ijer.2013.633
W. Huang; S. Yano; J.M. Zhang; Y.R. Wang. "Spatial and Temporal Variation in Stable Isotopes Signatures of Periphyton and an Endangered fish in a flow-reduced River Reach". , 7, 3, 1392, 533-538. doi: 10.22059/ijer.2013.633
Huang, W., Yano, S., Zhang, J.M., Wang, Y.R.. (1392). 'Spatial and Temporal Variation in Stable Isotopes Signatures of Periphyton and an Endangered fish in a flow-reduced River Reach', , 7(3), pp. 533-538. doi: 10.22059/ijer.2013.633
Huang, W., Yano, S., Zhang, J.M., Wang, Y.R.. Spatial and Temporal Variation in Stable Isotopes Signatures of Periphyton and an Endangered fish in a flow-reduced River Reach. , 1392; 7(3): 533-538. doi: 10.22059/ijer.2013.633

Spatial and Temporal Variation in Stable Isotopes Signatures of Periphyton and an Endangered fish in a flow-reduced River Reach

International Journal of Environmental Research
مقاله 2، دوره 7، شماره 3، مهر 2013، صفحه 533-538    اصل مقاله (464.13 K)
نوع مقاله: Original Research Paper
شناسه دیجیتال (DOI): 10.22059/ijer.2013.633
نویسندگان
W. Huang* 1؛ S. Yano2؛ J.M. Zhang3؛ Y.R. Wang3
1Department of urban and environment engineering, Kyushu University, Fukuoka, 8190395, Japan. China Institute of Water Resources and Hydropower Research, Beijing, 10038, China
2Department of urban and environment engineering, Kyushu University, Fukuoka, 8190395, Japan
3State key laboratory of hydraulics and mountain river engineering, Sichuan University,
چکیده
The environmental and ecological issues in the flow-reduced river reach are very serious and are
receiving increasingly attention. In this study, we investigate the temporal and spatial changes in δ13C and δ15N of Periphyton and isotopic relationship between Periphyton and the endangered fish (Ayu, Plecoglossus
altivelis) in a flow-reduced river reach in Japan. Much of the spatial and temporal variation in δ13C of
endangered fish was explained by variation in Periphyton, indicating a strong link between primary production and higher order consumers. The Periphyton δ13C was correlated with current velocity while it was not correlated with the Periphyton biomass (Chl.a). Spatially, the relatively high δ13C and δ15N of Periphyton in the lower sites of the flow-reduced river reach might be due to high level of anthropogenically derived N and C introduced from the surrounding agricultural activities and human settings. The trophic position of the endangered fish in was estimated to be 1.5-2.2(1.8±0.3), which agrees with the previous stomach content analysis suggesting that the ayu mainly feed on Periphyton.
کلیدواژه‌ها
δ13C؛ δ15N؛ Periphyton؛ Endangered fish؛ Flow-reduced river reach
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