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Light Availability as a Possible Regulator of Cyanobacteria Species Composition in a Shallow Subtropical Lake by Karl E. Havens; Edward J. Phlips; Mary F. Cichra; Bai‐lian Li is a Environmental Science article available to read on EtoBox.

What is Light Availability as a Possible Regulator of Cyanobacteria Species Composition in a Shallow Subtropical Lake about?

1. Variations in the relative biovolumes of dominant cyanobacterial taxa were evaluated in the context of environmental conditions using canonical correlation analysis (CCorrA) and Redundancy Analysis (RDA). The objective was to test a conceptual model in which underwater irradiance determines dominance by bloom‐forming (high light adapted) or non‐blooming (low light adapted) taxa. 2. The data set consisted of 404 contiguous observations, collected over a 3‐year period at eight pelagic sites, in shallow Lake Okeechobee, Florida, U.S.A. Data included species biovolumes, total phosphorus (TP), total nitrogen (TN), dissolved oxygen (DO) and chlorophyll a concentrations, as well as two indices: underwater irradiance (Secchi depth) and the ratio of Secchi:total depth. 3. The first environmental canonical variable was strongly correlated with the two light‐related indices, and negatively correlated with TP. This reflects the predominant role of resuspended P‐rich lake sediments in controlling underwater irradiance in the shallow lake. The first species canonical variable displayed a strong negative correlation with __Lyngbya limnetica__ and __L. contorta__, and positive correlations with

Who reads Light Availability as a Possible Regulator of Cyanobacteria Species Composition in a Shallow Subtropical Lake?

Author

Karl E. Havens; Edward J. Phlips; Mary F. Cichra; Bai‐lian Li

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0046-5070)

Published

1998

Language

EN

Field

Environmental Science (Physical Sciences)