期刊
AQUATIC ECOSYSTEM HEALTH & MANAGEMENT
卷 13, 期 2, 页码 154-163出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/14634981003788953
关键词
light limitation; nutrient limitation; diatoms; cyanobacteria
资金
- Estonian Ministry of Education and Research [SF 0170011508]
- Estonian Science Foundation [7600]
- EC
- Estonian Ministry of Environment
Water level changes (7-year moving averages) in Lake Vortsjarv (Estonia) during 1885-2000 were correlated with winter patterns in the North Atlantic Oscillation (NAO) index. In this shallow lake (270 km(2), mean depth 2.8 m), where the annual water level amplitude is 1.4 m and the absolute range is 3.2 m, hydrology is the main driving force for the ecosystem. Control of phytoplankton growth was mediated by ice conditions in spring, and by water level in summer and autumn. Winter air temperature similarly influenced the biomass of cyanobacteria and diatoms in spring; while the effect of the ice-cover duration was more pronounced on cyanobacteria. Mean depth of the lake did not affect the phytoplankton biomass in spring, but clearly controlled it in summer and autumn. The direct impact of winter conditions on biological processes was restricted to a short post-winter period, but extended indirectly as the water level for the entire growing season depended strongly on the height of the spring flood peak.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据