Phosphorus loading reductions needed to control blue-green algal blooms in Lake Mendota

Canadian Journal of Fisheries and Aquatic Sciences - Tập 55 Số 5 - Trang 1169-1178 - 1998
Richard C. Lathrop1, Stephen R. Carpenter1, Craig A. Stow1, Patricia A. Soranno2, John C. Panuska1
1Wisconsin Department Natural Resources
2Fisheries and Wildlife

Tóm tắt

We evaluated the reductions in P loading needed to control blue-green algal blooms in Lake Mendota, Wisconsin. After developing a 21-year loading data set, we used a P mass balance model expressed as a difference equation with an annual time step indexed from mid-April. We defined and estimated a loss parameter lambda as the proportion of the lake's April P concentration lost through sedimentation and outflow during the following year. Using the distribution of annual lambda 's and input loadings, we predicted the steady-state distribution of April P concentrations that would result from scenarios of altered inputs due to changes in management practices. These results were then linked to the probability of summer blue-green algal blooms. For no load reduction, the probability of a bloom (>2 mg algae ·L-1) on any summer day is about 60%. This probability decreases to 20% with a load reduction of 50%. Our approach illustrates how managers can consider reducing the frequency of extreme events like algal blooms, which may correspond more to the public's perception of lake water quality than average conditions.

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Tài liệu tham khảo

Barker F., 1988, Biometrics, 44, 279, 10.2307/2531917

Canfield D.E., Jr., 1981, Can. J. Fish. Aquat. Sci., 38, 414, 10.1139/f81-058

Dillon P.J., 1974, J. Fish. Res. Board Can., 31, 1771, 10.1139/f74-225

Dillon P.J., 1974, Limnol. Oceanogr., 19, 767, 10.4319/lo.1974.19.5.0767

Havens K.E., 1994, Lake Reservoir Manage., 10, 133, 10.1080/07438149409354184

Havens K.E., 1994, U.S.A. Lake Reservoir Manage., 10, 139, 10.1080/07438149409354185

Henrich E.W., 1983, U.S. Geol. Surv. Open-File Rep., 83

James R.T., 1996, Water Resour. Bull., 32, 1

Lathrop R.C., 1996, Can. J. Fish. Aquat. Sci., 53, 2250, 10.1139/f96-187

Paerl H.W., 1988, Limnol. Oceanogr., 33, 823

Soranno P.A., 1997, Can. J. Fish. Aquat. Sci., 54, 1965

Soranno P.A., 1996, Ecol. Appl., 6, 865, 10.2307/2269490

Soranno P.A., 1997, Can. J. Fish. Aquat. Sci., 54, 1883, 10.1139/f97-095

Stow C.A., 1997, Wisconsin. Can. J. Fish. Aquat. Sci., 54, 464, 10.1139/f96-279

Vollenweider R.A., 1969, Arch. Hydrobiol., 66, 1

Vollenweider R.A., 1975, Schweiz. Z. Hydrol., 37, 53

Vollenweider R.A., 1976, Mem. Ist. Ital. Idrobiol., 33, 53

Walker W.W., Jr., 1985, Lake Reservoir Manage., 4, 57

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Thông tin xuất bản

Canadian Journal of Fisheries and Aquatic Sciences

Tập 55 Số 5

1169-1178

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