THE TROPHIC SIGNIFICANCE OF EPILITHIC ALGAL PRODUCTION IN A FERTILIZED TUNDRA RIVER ECOSYSTEM

被引：76

作者：

PETERSON, B ^{[1
]}

FRY, B ^{[1
]}

DEEGAN, L ^{[1
]}

机构：

[1] UNIV MINNESOTA,DEPT BIOL,DULUTH,MN 55812

来源：

LIMNOLOGY AND OCEANOGRAPHY | 1993年 / 38卷 / 04期

关键词：

D O I：

10.4319/lo.1993.38.4.0872

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Fertilization of a pristine tundra river with phosphorus and nitrogen changed the nitrogen and carbon stable isotope ratios in epilithic algae. Determination of deltaN-15 and deltaC-13 values in consumers allowed this algal organic matter to be traced in the food web for several kilometers downstream of the fertilizer addition sites. Changes in the isotopic composition of consumers documented the tight coupling algal production in response to fertilization and measured increases in the growth of insects and fish.

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页码：872 / 878

页数：7

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