Conservation Ecology: Sustaining aquatic ecosystems in boreal regions: Table 1

Table 1. Declines in wetland communities and related animals after closing Bennett Dam, summarized from Green (1992)

Losses
Percentage Loss
Comments

Reduction in wetlands
1967-1989
1967-2006
47%
78%
Scirpus and other emergents replaced by Calamagrostis, Salix, other grasses and shrubs

Dabbling duck production
1971-1975
46%
Also, reduced fall staging by waterfowl

Diving duck production
1971-1975
46%

Muskrat
1971-1978
Pre-flood to mid-80s
67%
95%
Wetlands dried out
Loss of $40,000 to $123,000 annually
Fish
Decline, magnitude large but unquantified
Mink, moose, fox
Declined, magnitude unquantified

Losses	Percentage Loss	Comments
Reduction in wetlands 1967-1989 1967-2006	47% 78%	Scirpus and other emergents replaced by Calamagrostis, Salix, other grasses and shrubs
Dabbling duck production 1971-1975	46%	Also, reduced fall staging by waterfowl
Diving duck production 1971-1975	46%
Muskrat 1971-1978 Pre-flood to mid-80s	67% 95%	Wetlands dried out Loss of $40,000 to $123,000 annually
Fish	Decline, magnitude large but unquantified
Mink, moose, fox	Declined, magnitude unquantified