水质检测浮游植物及环境因子金溪.docxVIP

摘 要 本实验对宁德金溪开展秋、冬季的研究，测定金溪总氮、硝酸盐氮、氨氮、总磷、叶绿素a等指标，进行水质检测，并研究金溪浮游植物群落结构，分析其浮游植物与环境因子的关系。研究结果如下：浮游植物叶绿素a浓度在1.92-54.15μg/L之间变化。秋季叶绿素a浓度平均值为17.82±20.46μg/L，冬季叶绿素a浓度平均值为8.89±5.49μg/L。秋、冬季各个位点营养状态存在时空上的差异。pH在6.68-8.67之间变化，整体上看呈弱碱性。共鉴定出秋、冬季浮游植物6门29属29种，硅藻门、绿藻门和蓝藻门种类占比较大。其群落结构组成为硅藻-绿藻型。共发现优势种四种，为微囊藻、隐球藻、隐杆藻、小球藻。叶绿素a与丰度、生物量、pH、溶解氧均呈正相关。该研究可为相似水生态环境研究提供参考。 关键词:水质检测；浮游植物；环境因子；金溪 Abstract In?this?study,?the?total?nitrogen,?nitrate?nitrogen,?ammonia?nitrogen,?total?phosphorus,?chlorophyll?a?and?other?indicators?in?jinxi?were?measured?in?autumn?and?winter,?and?the?water?quality?was?tested.?The?phytoplankton?community?structure?in?jinxi?was?studied,?and?the?relationship?between?phytoplankton?and?environmental?factors?was?analyzed.The?results?were?as?follows:?the?concentration?of?chlorophyll?a?in?phytoplankton?varied?from?1.92?to?54.15?g/L.?The?mean?chlorophyll?a?concentration?was?17.82±20.46?g/L?in?autumn?and?8.89±5.49?g/L?in?winter.?There?were?temporal?and?spatial?differences?in?the?nutritional?status?of?each?site?in?autumn?and?winter.PH?varies?between?6.68?and?8.67,?which?is?slightly?alkaline?on?the?whole.?A?total?of?29?genera?and?29?species?of?6?groups?of?phytoplankton?were?identified?in?autumn?and?winter,?and?diatomophyta,?chlorophyta?and?cyanophyta?accounted?for?a?large?proportion.?The?community?structure?was?diatom?-?green?algae?type.our?dominant?species?were?found:?microcystis,?cryptomychlorella,?cryptomychlorella?and?chlorella.?Chlorophyll?a?was?positively?correlated?with?abundance,?biomass,?pH?and?dissolved?oxygen.?This?study?can?provide?reference?for?the?study?of?similar?water?ecological?environment. Keywords:Water?quality?testing;?Phytoplankton;?Environmental?factors;?Gold?creek 目 录 TOC \o 1-3 \h \u 1 引 言 1 1.1 研究背景 1 1.2 浮游植物与环境因子概述 1 1.2.1浮游植物 1 1.2.2环境因子 2 1.2.3浮游植物对水质的指示性 2 1.3研究进展 2 1.3.1水质检测研究进展 3 1.3.2浮游植物的研究进展 3 1.4研究内容及意义 4 1.4.1研究内容 4 1.4.2研究意义 4 2 样品采集与分析方法 5 2.1 采样点布设与采样时间 5 2.2样品采集与处理步骤 6 2.2.1定性样品的采集与处理 6 2.2.2定量样品的采集与处理 6 2.3样品