Response of wetland herbaceous communities to gradients of light and substrate following disturbance by thermal pollution

Vegetatio
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Abstract

The influence of thermal disturbance and site characteristics on distribution of herbs was studied in portions of a 3020 ha wetland in the southeastern USA. Presence-absence of 52 species in 130 0.25 m2 plots was determined from four sites with different disturbance histories and from an undisturbed site. Data from the four disturbed sites were ordinated by detrended correspondence analysis. Differences in species composition among sites (coarse scale) were associated with water depth, light, and substrate type. Within a site (at a fine scale), correlation of environmental variables with ordination scores at a chronically disturbed site was weakly correlated with light (r=0.50). At two sites with episodic disturbance, species composition correlated significantly and positively with substrate and water depth. At a recovering site, vegetation patterns were moderately correlated with water depth (r=βˆ’0.52). Species richness was correlated with substrate type along the disturbance gradient. Our results are consistent the intermediate disturbance hypothesis and the subsidy-stress gradient concept.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Response of wetland herbaceous communities to gradients of light and substrate following disturbance by thermal pollution
Series title Vegetatio
DOI 10.1007/BF00041477
Volume 70
Issue 2
Year Published 1987
Language English
Publisher W. Junk
Publisher location Dordrecht
Description 6 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Vegetatio
First page 119
Last page 124