NUTRIENT LIMITATION OF HARDSTEM BULRUSH (SCIRPUS-ACUTUS MUHL) IN A MANITOBA INTERLAKE REGION MARSH

被引：6

作者：

NEILL, C

机构：

[1] Department of Forestry and Wildlife Management, University of Massachusetts, Amherst, 01003, MA

来源：

WETLANDS | 1990年 / 10卷 / 01期

关键词：

biomass; Interlake; Manitoba; nitrogen; nutrient limitation; phosphorus; Scirpus acutus;

D O I：

10.1007/BF03160824

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Nitrogen and phosphorus fertilizer were added to a hardstem bulrush (Scirpus acutus Muhl.) marsh in the Interlake region of south-central Manitoba to assess nutrient limitation. Neither N nor P increased biomass when applied alone, but N+P increased aboveground biomass to nearly double the control, indicating that both N and P were near limiting. Fertilization had no effect on belowground biomass. Nitrogen fertilization raised the N content of aboveground plant tissues from 0.8% to 1.3%, and P fertilization raised the P content from 0.07% to 0.23% and indicated that added fertilizer was taken up by the plants. Biomass in unfertilized control plots varied substantially between years from 690 g·m -2·y -1 in 1986 to 395 g·m -2·y -1 in 1987. A contrast between this Interlake marsh and the Delta Marsh in central Manitoba, in which emergent vegetation is N limited, provides a clear example that marshes within the same northern prairie region can differ in the limiting nutrient, and potentially in their response to anthropogenic nutrient enrichment. © 1990 Society of Wetland Scientists.

引用

页码：69 / 76

页数：8

共 17 条

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