湖泊科学2026，Vol.38Issue(3)：943-954,12.DOI:10.18307/2026.0313
细胞配额解析中营养水库藻类生长的资源限制与营养阈值
Cell quotas explained the resource limitations and nutritional thresholds on algae growth in mesotrophic reservoirs
摘要
Abstract
Mesotrophic lakes and reservoirs,as critical sources of drinking water,exhibit unclear mechanisms governing the occur-rence of occasional algal blooms and the dynamics of nutrient limitation.This study investigated Duihekou Reservoir in Zhejiang Province through four years of in situ monitoring to elucidate fluctuations in algal growth rates and their dynamic coupling with intra-cellular nutrient quotas.Results indicated that during the diatom-dominated phase(December-April,DIA),the in situ algal growth rate varied markedly from-1.10 d-1 to 2.76 d-1,whereas during the cyanobacteria-dominated phase(July-August,CYA),it ranged from-0.43 d-1 to 0.81 d-1—higher than values typically observed in eutrophic systems—suggesting a high po-tential for rapid algal proliferation in mesotrophic waters.Growth rates in the DIA phase were primarily governed by nitrogen cell quotas,which may be attributed to the suppression of chlorophyll synthesis and nitrogen assimilation efficiency under light and tem-perature limitations.Therefore,a springtime rise in temperature and light intensity,coupled with elevated cellular nitrogen con-tent,could trigger diatom blooms.In contrast,growth rates in the CYA phase were co-regulated by phosphorus cell quotas and en-vironmental phosphorus quotas.Maintaining total phosphorus below 22 μg/L(95％CI:15-32 μg/L)could effectively suppress cyanobacterial blooms(chlorophyll-a＞10 μg/L).This study innovatively incorporates dynamic intracellular nutrient quotas to ana-lyze algal growth mechanisms,overcoming the traditional reliance on ambient nutrient concentrations,algal biomass,or N∶P ratios to determine nutrient limitation.The approach offers a new theoretical basis for water quality management and bloom forecasting in mesotrophic lakes and reservoirs.关键词
中营养湖库/原位生长速率/细胞配额/资源限制/藻类水华Key words
Mesotrophic lakes and reservoirs/in situ growth rate/cell quota/resource limitation/algal blooms引用本文复制引用
杨瑾晟,吴越,曹文雅,徐洪亮,陈开宁,史小丽..细胞配额解析中营养水库藻类生长的资源限制与营养阈值[J].湖泊科学,2026,38(3):943-954,12.基金项目
江苏省基础研究计划(BK20231516)、国家自然科学基金项目(U22A20616)和浙江省德清县对河口水库水源地生态环境保护项目(DHK-SYBH-01,DHK-SYBH-02)联合资助. （BK20231516）
