摘要
长江中下游是我国淡水湖泊最集中的区域,也是富营养化较为严重的地区。作为湖泊系统初级生产力的主要影响因子氮、磷等营养元素增加,会显著影响湖泊系统的初级生产力。近几十年来越来越多的学者运用模型来模拟湖泊等水体的初级生产力。而VGPM模型和Talling模型综合考虑了水温、光合有效辐射、湖泊叶绿素浓度和真光层深度等因素,能较准确地模拟水柱初级生产力。1987～1991年、2001～2005年长江中下游湖区湖水中TP浓度分别为0.059～0.105和0.070～0.167mg/L,湖泊TP浓度升高,导致湖泊藻类初级生产力增大。15a间湖区的初级生产力由0.139～0.381gC/(m2.d)上升到0.128～0.504gC/(m2.d)。在VGPM模型1987～1991年、2001～2005年湖区固碳量由3 321.25tC/d上升到3 765.02tC/d,增加13.36%;在Talling模型中湖区固碳量由2 399.64tC/d上升到3 272.42tC/d,增加36.37%。
Limnological region in middle and lower reaches of the Yangtze River is China＇s most intensive and eutrophic freshwater lakes.As one of the main factors of primary productivity,the nitrogen and phosphorus increase will significantly affect the primary productivity in lakes.The vertically generalized production model（VGPM）and Talling model comprehensively consider the affecting factors of water temperature,photosynthetically active radiation at the water surface,chlorophyll-a concentration,euphotic depth to phytoplankton primary production.Using VGPM and Talling model,we studied phytoplanktkon primary production of lakes located in the middle and lower reaches of the Yangtze River.As the results show,the mean primary productivity was 0.139~0.381 gC/（m2·d）during 1987~1991,0.128~0.504 gC/（m2·d） during 2001 to 2005.The mean fixed carbon amount via the phytoplankton photosynthesis was 3 321.25 tC/d during 1987 to 1991,and 3 765.02 tC/d during 2001 to 2005 by VGPM,increasd 13.36%.But it increased from 2 399.64 tC/d to 3 272.42 tC/d by Talling model,increased 36.37%.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2011年第6期717-722,共6页
Resources and Environment in the Yangtze Basin
基金
国家重点基础研究计划(973)项目(2010CB955904)
关键词
VGPM模型
Talling模型
浮游植物初级生产力
长江中下游湖泊
VGPM model
Talling model
phytoplankton primary production
lakes in the middle and lower reaches of the Yangtze River
作者简介
曾台衡（1987-），男，福建省福州人，硕士研究生。主要从事藻类分类学和生态学研究．E—mail：zengtaiheng2006@126．com
通讯作者E-mail：liugx@ihb．ac．cn
