Regulation of phytoplankton dynamics in a Laurentian Great Lakes estuary |
| |
Authors: | David M. Klarer David F. Millie |
| |
Affiliation: | (1) Old Woman Creek State Nature Preserve & National Estuarine Research Reserve, Ohio Department of Natural Resources, 2514 Cleveland Rd., 44839 East, Huron, OH, USA;(2) Southern Regional Research Center, U.S. Department of Agriculture, Agricultural Research Service P.O. Box 19687, 70179 New Orleans, LA, USA;(3) Department of Biological Sciences, Loyola University, 6363 St. Charles Avenue, 70018 New Orleans, LA, USA |
| |
Abstract: | The composition and dynamics of phytoplankton populations were examined in Old Woman Creek estuary, Lake Erie (USA). The centric bacillariophytes,Cyclotella atomus Hust.,Cyclotella meneghiniana Kütz., andAulacoseira alpigena (Grun.) Krammer, and the cryptophytes,Cryptomonas erosa Ehren. andRhodomonas minuta var. nannoplanctonica Skuja, dominated the phytoplankton most of the year. Chlorophytes, euglenophytes, and cyanophytes were observed less frequently. Estuarine and Lake Erie phytoplankton were considered distinct populations; lake taxa were largely confined to the estuary mouth and present only in low biomass. Maxima and minima of estuarine phytoplankton coincided with meteorological and hydrological forcing in the form of rainfall and subsequent storm-water inflows, respectively. Distinct population dynamics between the upper and lower estuary following storm events were attributed to the presence/absence of refugia serving as a source for repopulation by opportunistic taxa, fluctuating light conditions in the water column resulting from influx of particulate matter and resuspension of bottom sediments, and nutrient inputs associated with surface runoff and sub-surface interflow. Additionally, agricultural herbicides introduced by storm-water inflows potentially may affect and/or control the growth and physiological responses of individual taxa. |
| |
Keywords: | algae bacillariophytes cryptophytes freshwater estuary Lake Erie phytoplankton storm water |
本文献已被 SpringerLink 等数据库收录! |
|