| 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) |
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| 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).
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| 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. |
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