LEAF LITTER DECOMPOSITION IN 3 LOUISIANA FRESH-WATER FORESTED WETLAND AREAS WITH DIFFERENT FLOODING REGIMES

被引：29

作者：

CONNER, WH

DAY, JW

机构：

[1] Baruch Forest Science Institute, Georgetown, 29442, SC

[2] Coastal Ecology Institute and Department of Oceanography and Coastal Sciences, Louisiana State University, Baton Rouge, 70803-7503, LA

来源：

WETLANDS | 1991年 / 11卷 / 02期

关键词：

WETLANDS; HYDROLOGY; SEDIMENTATION; BURIAL; NUTRIENTS;

D O I：

10.1007/BF03160855

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Litter decomposition was studied for one year in three Louisiana forested wetland sites with different flooding regimes. Decomposition was significantly higher in a crayfish pond where flooding was manipulated by pumping. Only 20% of the original dry mass remained after 46 weeks versus over 40% in the natural and impounded wetland forests. Nitrogen was immobilized in the natural and impounded areas but was mineralized during the spring and summer in the managed area. Phosphorus was not immobilized in the natural and impounded areas like nitrogen but was mineralized much more slowly in these areas than it was in the managed area. Because of the slower decomposition in the natural and impounded areas, falling leaf litter buries the old, partially decomposed material. Thus, there tends to be a net accumulation of organic matter, nitrogen, and phosphorus in stagnant, more flooded areas and mineralization and/or export from free-flowing areas.

引用

页码：303 / 312

页数：10

共 30 条

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[6] Conner W.H., Day J.W., The ecology of forested wetlands in the southeastern United States, Wetlands: Ecology and Management, pp. 69-87, (1982)
[7] Conner W.H., Sasser C.E., Vegetational composition of the upper Barataria Basin swamp, Louisiana, Northeast Gulf Science, 7, pp. 163-166, (1985)
[8] Conner W.H., Day J.W., Rising water levels in coastal Louisiana: implications for two coastal forested wetland areas in Louisiana, Journal of Coastal Research, 4, pp. 589-596, (1988)
[9] Conner W.H., Gosselink J.G., Parrondo R.T., Comparison of the vegetation of three Louisiana swamp sites with different flooding regimes, American Journal of Botany, 68, pp. 320-331, (1981)
[10] Day F.P., Litter decomposition rates in the seasonally flooded Great Dismal Swamp, Ecology, 63, pp. 670-678, (1982)

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