长江中下游湖区浮游植物初级生产力估算

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167 mg/L，湖泊TP浓度升高，导致湖泊藻类初级生产力增大。15 a间湖区的初级生产力由0139～0381 gC/(m2〖DK〗·d)上升到0128～0504 gC/(m2〖DK〗·d)。在VGPM模型1987～1991年、2001～2005年湖区固碳量由3 32125 tC/d上升到3 76502 tC/d，增加1336%；在Talling模型中湖区固碳量由2 39964 tC/d上升到3 27242 tC/d，增加3637%

ESTIMATION OF PHYTOPLANKTON PRIMARY PRODUCTION OF LAKES IN THE MIDDLE AND LOWER REACHES OF THE YANGTZE RIVER

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 ...