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Title: Effects of differential growth and mortality in the seasonal succession of phytoplankton populations in Lawrence Lake, Michigan

Abstract

An investigation was made of factors controlling algal succession in a small, oligotrophic lake during summer stratification. Phytoplankton population densities, growth rates, sedimentation losses, and mortality due to zooplankton grazing were measured weekly. Cyclotella michiganiana was the dominant alga through the end of June, at which time Cyclotella comensis began to increase, becoming the dominant by August. In August, high grazing pressure caused the rapid declines of both C. michiganiana and C. comensis, which were followed by an increase of Sphaerocystis schroeteri. The combined effect of greater growth rates and lower loss rates of C. comensis resulted in its dominance over C. michiganiana. In contrast, the C. comensis-S. schroeteri succession clearly resulted from differential mortality alone. It is likely that losses due to sedimentation and/or grazing are important in many lakes and that interspecific competition may be less important in actually controlling seasonal succession.

Authors:
;
Publication Date:
Research Org.:
Michigan State Univ., Hickory Corners
OSTI Identifier:
5707990
DOE Contract Number:  
AC02-76EV01599
Resource Type:
Journal Article
Journal Name:
Ecology; (United States)
Additional Journal Information:
Journal Volume: 63:6
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 59 BASIC BIOLOGICAL SCIENCES; PHYTOPLANKTON; ECOLOGICAL SUCCESSION; POPULATION DYNAMICS; SPECIES DIVERSITY; GROWTH; LAKES; MICHIGAN; MORTALITY; AQUATIC ORGANISMS; FEDERAL REGION V; NORTH AMERICA; PLANKTON; SURFACE WATERS; USA; 520100* - Environment, Aquatic- Basic Studies- (-1989); 550100 - Behavioral Biology

Citation Formats

Crumpton, W G, and Wetzel, R G. Effects of differential growth and mortality in the seasonal succession of phytoplankton populations in Lawrence Lake, Michigan. United States: N. p., 1982. Web. doi:10.2307/1940115.
Crumpton, W G, & Wetzel, R G. Effects of differential growth and mortality in the seasonal succession of phytoplankton populations in Lawrence Lake, Michigan. United States. doi:10.2307/1940115.
Crumpton, W G, and Wetzel, R G. Wed . "Effects of differential growth and mortality in the seasonal succession of phytoplankton populations in Lawrence Lake, Michigan". United States. doi:10.2307/1940115.
@article{osti_5707990,
title = {Effects of differential growth and mortality in the seasonal succession of phytoplankton populations in Lawrence Lake, Michigan},
author = {Crumpton, W G and Wetzel, R G},
abstractNote = {An investigation was made of factors controlling algal succession in a small, oligotrophic lake during summer stratification. Phytoplankton population densities, growth rates, sedimentation losses, and mortality due to zooplankton grazing were measured weekly. Cyclotella michiganiana was the dominant alga through the end of June, at which time Cyclotella comensis began to increase, becoming the dominant by August. In August, high grazing pressure caused the rapid declines of both C. michiganiana and C. comensis, which were followed by an increase of Sphaerocystis schroeteri. The combined effect of greater growth rates and lower loss rates of C. comensis resulted in its dominance over C. michiganiana. In contrast, the C. comensis-S. schroeteri succession clearly resulted from differential mortality alone. It is likely that losses due to sedimentation and/or grazing are important in many lakes and that interspecific competition may be less important in actually controlling seasonal succession.},
doi = {10.2307/1940115},
journal = {Ecology; (United States)},
number = ,
volume = 63:6,
place = {United States},
year = {1982},
month = {12}
}