SALINE LAKES OF SASKATCHEWAN .4. PRIMARY PRODUCTION BY PHYTOPLANKTON IN SELECTED SALINE ECOSYSTEMS

被引：39

作者：

HAYNES, RC

HAMMER, UT

机构：

[1] Department of Biology, University of Saskatchewan, Saskatoon

来源：

INTERNATIONALE REVUE DER GESAMTEN HYDROBIOLOGIE | 1978年 / 63卷 / 03期

关键词：

D O I：

10.1002/iroh.19780630304

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

Primary production by phytoplankton, efficiency of photosynthesis, and chlorophyll‐a concentrations were determined for seven saline lakes that varied widely in ionic concentration and composition. The investigations were done during the summer months of 1972 and 1973. Productivity ranged from 0.001 to 11.135 g C m−3 day−1 and 0.053 to 7.968 g C m−2 day−1. Highest productivities were measured in two lakes that supported blooms of Aphanizomenon flos‐aquae and Nodularia spumigena, respectively. Species of Cyanophyceae, Bacillariophyceae and Chlorophyceae dominated the phytoplankton of the study lakes. Active chlorophyll‐a ranged from 0.01 to 116 mg m−3. Integral photosynthetic efficiency estimates were <1% except during phytoplankton blooms when they were considerably higher. The overall range of 0.03 to 3.8% is concordant with estimates for other lacustrine ecosystems. The extinction of light caused by photo‐synthetic processes, or in situ efficiency, was <1% in the trophogenic zone for most lakes but, it was considerably higher during blooms. In situ efficiencies invariably increased with depth in ail lakes. Copyright © 1978 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：337 / 351

页数：15

共 68 条

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