Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

Wind Influences Phytoplankton Biomass and Composition in a Shallow, Productive Lake

Hunter J. Carrick, Frederick J. Aldridge and Claire L. Schelske
Limnology and Oceanography
Vol. 38, No. 6 (Sep., 1993), pp. 1179-1192
Stable URL: http://www.jstor.org/stable/2837785
Page Count: 14
  • More info
  • Cite this Item
Wind Influences Phytoplankton Biomass and Composition in a Shallow, Productive Lake
Preview not available

Abstract

Factors that regulate phytoplankton dynamics in shallow, productive lakes are poorly understood. Water-column phytoplankton chlorophyll (avg 105μ g liter-1) determined on 39 occasions over a 22-month period in shallow (mean depth, 1.7 m) Lake Apopka, Florida, correlated best with average daily windspeed compared with other environmental variables. High phytoplankton biomass reflects wind-induced resuspension of a meroplanktonic algal maximum (MAM) that exists on the aphotic lake bottom in a layer ∼ 5 cm thick; this assemblage is dominated by microplankton-sized diatoms ($>60%$ of total biomass) that can occur in cellular resting stages. Experiments demonstrate that the MAM can grow and photosynthesize at rates similar to surface populations when exposed to moderate irradiances. Direct inoculation of this meroplanktonic assemblage into surface waters during periods of high wind can account for a doubling in surface phytoplankton and diatom biomass as well as an increase in algal community size. A conceptual model outlines the influence that resuspension of the MAM has on ecosystem structure and function in the lake.

Page Thumbnails

  • Thumbnail: Page 
1179
    1179
  • Thumbnail: Page 
1180
    1180
  • Thumbnail: Page 
1181
    1181
  • Thumbnail: Page 
1182
    1182
  • Thumbnail: Page 
1183
    1183
  • Thumbnail: Page 
1184
    1184
  • Thumbnail: Page 
1185
    1185
  • Thumbnail: Page 
1186
    1186
  • Thumbnail: Page 
1187
    1187
  • Thumbnail: Page 
1188
    1188
  • Thumbnail: Page 
1189
    1189
  • Thumbnail: Page 
1190
    1190
  • Thumbnail: Page 
1191
    1191
  • Thumbnail: Page 
1192
    1192