Risch Anita Christina
NUTNET (Nutrient network): Impact on nutrient fluxes, productivity and diversity in grassland ecosystems by consumers and fertilizing
NUTNET (Nutrient network): Beeinflussung von Nährstoff-Flüssen, Produktivität und Diversität in Wiesenökosystemen durch Konsumenten und Düngung
Project Number: CH-3861
Research Areas:
Disciplines:
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| general biology |
| engineering sciences |
| agricultural sciences |
Abstract:
Two of the most pervasive human impacts on ecosystems are alteration of global nutrient budgets and changes in the abundance and identity of consumers. Fossil fuel combustion and agricultural fertilization have doubled and quintupled, respectively, global pools of nitrogen and phosphorus relative to pre-industrial levels. Concurrently, habitat loss and degradation and selective hunting and fishing disproportionately remove consumers from food webs. At the same time, humans are adding consumers to food webs for endpoints such as conservation, recreation, and agriculture, as well as accidental introductions of invasive consumer species. In spite of the global impacts of these human activities, there have been no globally coordinated experiments to quantify the general impacts on ecological systems. The Nutrient Network (NutNet) is a grassroots research effort to address these questions within a coordinated research network comprised of more than 40 grassland sites worldwide.
Leading questions:
1. How general is our current understanding of productivity-diversity relationships?
2. To what extent are plant production and diversity co-limited by multiple nutrients in herbaceous-dominated communities?
3. Under what conditions do grazers or fertilization control plant biomass, diversity, and composition?
PDF:
http://www.nutnet.umn.edu
Publications:
list of publications
Last update: 12/20/22
Source of data: ProClim- Research InfoSystem (1993-2024)
Update the data of project: CH-3861
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