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Comparison of wetlands in different hydrogeological settings under conditions of extreme climate variability

IAHS-AISH Publication

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Abstract

Wetlands in the Cottonwood Lake area in North Dakota, USA, are underlain by poorly permeable till and have little groundwater input. Lakes and wetlands in the Shingobee River headwaters in Minnesota are underlain by permeable sand and have substantial groundwater input. Hydrological, chemical, and biological characteristics of these ecosystems have been monitored since 1977. Both sites experienced the second worst drought of the 20th century followed by the wettest period in more than a century. At Cottonwood Lake, plants that invaded the dry wetlands during the drought were flooded during the wet period and became a food source for animals. This resulted in successive substantial population increases and declines of plankton, invertebrates, amphibians and waterfowl. Substantial groundwater input buffered the lakes and wetlands in the Shingobee area against the changing water conditions. Only subtle changes in water chemistry and plankton populations were observed during the transition from drought to deluge.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Comparison of wetlands in different hydrogeological settings under conditions of extreme climate variability
Series title:
IAHS-AISH Publication
Issue:
294
Year Published:
2005
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
139
Last page:
147
Number of Pages:
9