淀山湖湖水氮与叶绿素的时间格局转变研究 |
Regime shift of water nitrogen and chlorophyll-a in Dianshan Lake |
投稿时间:2010-05-05 修订日期:2010-10-26 |
DOI: |
中文关键词:营养状态 格局转变 格局转变顺序分析 格局转变指数 |
英文关键词:Trophic state Regime shift Sequential analysis of regime shifts Regime shift index |
基金项目:中国博士后基金(20090461149) |
|
摘要点击次数: 2392 |
全文下载次数: 2671 |
中文摘要: |
采用STARS(sequentialt testanalysisofregimeshifts)方法,以淀山湖水体中总氮(TN)、氨氮(NH3-N)、叶绿素a(Chl- a)和透明度(SD)为指标,研究了淀山湖水体氮与叶绿素在1991~2006年间的格局转变规律,分析了转变前后氮与叶绿素的格局特点。结果表明:1991~2006年间,淀山湖水体中NH3 -N和TN含量均存在2种格局,1次转变,发生转变的时间均在2000年;格局转变前NH3-N平均含量为0.649mg/L,转变后为2.014mg/L,是转变前的3.1倍;水体TN的平均含量格局转变前为2.550mg/L,转变后3.726mg/L,是转变前的1.5倍。淀山湖水体中Chl-a含量和SD也均存在2种格局,转变均发生在2001年。格局转变前水体中Chl-a平均含量9.341μg/L,转变后19.713μg/L,是转变前的2.1倍;水体SD在转变前平均62cm,转变后降低为43cm。2000年的格局转变指数(RSI)2.185,其中NH3 -N的1.038,TN的
1.147;2001年的RSI为1.341,其中Chl-a的0.318,SD的1.023。 |
英文摘要: |
Based on the water content of NH3-N,TN,Chl-a and SD in Dianshan Lake,from 1991 to 2006,the regime shift of nitrogen and Chl-a were studied by adopting the STARS ( sequential t-test analysis of regime shifts).Results showed that there were two regimes and one shift of NH3-N and TN content in the lake water,happened in 2000;before the shift NH3-N and TN content was 0.649 mg/L and 2.550 mg/L, respectively; after that they were relatively high,to be 2.014 mg/L and 3.726 mg/L, accordingly;there were two regimes for Chl-a and SD and both shifted in 2001; before the shift,Chl-a in the lake water was relatively low(9.341μg/L),then increased to 19.713 μg/L; at the same time,SD decreased from 62cm to 43cm with the shift of Chl-a. The regime shift indices(RSI ) were 2. 185 in 2000,which was the summation of 1 .038(RSI of NH3-N ) and 1. 147(RSI of TN);and 1.341 in 2001,which was the summation of 0. 318(RSI of Chl-a) and 1.023(RSI of SD).
|
梅雪英,张修峰,史利江,郑丽波.2010.淀山湖湖水氮与叶绿素的时间格局转变研究[J].水生态学杂志,31(6):1-5. |
查看全文 查看/发表评论 下载PDF阅读器 HTML |