生态学杂志2012，Vol.31Issue(2)：399-405,7.
基于“源-汇”景观的太湖宜兴段入湖港口水质时空变化
Spatiotemporal characteristics of water quality in Taihu Lake watershed based on ' sourcesink’ landscape change
摘要
Abstract
Aiming at the increasing worsening of non-point source pollution and the great change of land use pattern in Taihu Lake watershed, this paper studied the spatiotemporal variation of non-point source pollution in an area of the watershed based on source-sink landscape change. The test area was located in the 3 km buffer zone of Dati west bank of Taihu Lake, and 10 main channels in Yixing City connected with Taihu Lake were selected as the sampling plots. The source-sink location-weighted landscape contrast index (LCI) of these channels was calculated based on source-sink landscape theory, in addition to water sample collection and water quality analysis. Temporally , the LCI of 8 of the 10 channels had an obvious decrease in 2010 , as compared with that in 2004. Correspondingly, a main indicator of water quality, NH_4~+--N content, was decreased by 41.0%. The other parameters had no significant change. Spatially, the LCI was mainly affected by landscape pattern, and positively correlated with the comprehensive water quality identification index. Our results implied that the spatial change of the landscape pattern in the channels connected with Taihu Lake could obviously affect water quality. In sum, the LCI was closely correlated with the water quality indicators NH^_4~+-N and total N, the variation trend of the LCI was in accordance with that of the water quality, and the source-sink LCI could better reflect the generation and translocation of non-point source pollution.关键词
太湖/"源-汇"景观生态/景观对比指数/综合水质标识指数Key words
Taihu Lake/source-sink landscape ecology/landscape contrast index ( LCI)/comprehensive water quality identification index分类
天文与地球科学引用本文复制引用
王瑛,张建锋,陈光才,徐永辉,陈云,刘永庆..基于“源-汇”景观的太湖宜兴段入湖港口水质时空变化[J].生态学杂志,2012,31(2):399-405,7.基金项目
林业公益性行业科研专项(201104055)和江苏省科技项目(BE2009603和BE2008636)资助. （201104055）
