The effect of long‐term spatiotemporal variations in urbanization‐induced eutrophication on a benthic ecosystem, Osaka Bay, Japan
The effect of long‐term spatiotemporal variations in urbanization‐induced eutrophication on a benthic ecosystem, Osaka Bay, Japan
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DOI：
10.4319/lo.2007.52.4.1633
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发表时间：
2007-07
影响因子：
4.5
通讯作者：
M. Yasuhara;H. Yamazaki;A. Tsujimoto;Kotaro Hirose
中科院分区：
文献类型：
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作者：
M. Yasuhara;H. Yamazaki;A. Tsujimoto;Kotaro Hirose
利用近200年的沉积物岩心和化石介形类组合，研究了大阪湾城市化引起的富营养化对后生底栖生物群落影响的详细时空格局。结果表明，由于富营养化增加了食物供应，介形类总丰度在海湾中部增加。相反，内湾的丰度下降，可能是由于富营养化引起的底水缺氧。由于富营养化的影响，海湾内不同地点之间物种组成的差异可能已经减少，即在所有地点中，偏好食物丰富环境的物种占主导地位。这些富营养化引起的变化发生在1900年左右，这是日本工业革命的结果，而在1960年左右，则是快速城市化的结果，具体取决于地点。
Detailed spatiotemporal patterns of the influence of urbanization‐induced eutrophication on a metazoan benthic community in Osaka Bay were determined using sediment cores and fossil ostracode assemblages from the last 200 yr. Results suggest that total abundance of ostracodes increased in the middle part of the bay as a result of the increase of food supply by eutrophication. Conversely, abundance decreased in the inner bay, likely because of bottom‐water hypoxia by eutrophication. The variation in species composition among sites within the bay may have decreased because of the effect of eutrophication, i.e., the dominance of species that prefer food‐rich environments throughout all sites. These eutrophication‐induced changes occurred around 1900 as a result of Japan’s industrial revolution and around 1960 as a result of rapid urbanization, depending upon location.