Reversal of grazing impact on plant species richness in nutrient-poor vs. nutrient-rich ecosystems. From: Ecology | Date: December 1, 1998| Author: Proulx, Marc; Mazumder, Asit | COPYRIGHT 1998 Ecological Society of America. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group.Copyright information

To test the hypothesis that the impacts of grazers on plant species richness reverse under contrasting nutrient richness, we analyzed unpublished and published data from lake, stream, marine, grassland, and forest ecosystems. We analyzed data from 30 studies providing 44 comparisons of plant species richness under low vs. high grazing pressure in enriched or nutrient-rich and non-enriched or nutrient-poor ecosystems. All 19 comparisons from non-enriched or nutrient-poor ecosystems exhibited...

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