Nitrogen enrichment enhances the dominance of grasses
نویسندگان
چکیده
L. Song, X. M. Bao, X. J. Liu, Y. Zhang, P. Christie, A. Fangmeier, and F. S. Zhang College of Resources and Environmental Sciences, Key Laboratory of Plant-Soil Interactions of the Ministry of Education, China Agricultural University, Beijing 100193, China State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences (CAS), Urumqi 830011, China Agri-Environment Branch, Agri-Food and Biosciences Institute, Belfast BT9 5PX, UK Institute of Plant and Landscape Ecology, University of Hohenheim, 70593 Stuttgart, Germany
منابع مشابه
Effects of nitrogen enrichment, plant litter removal and cutting on a species-rich Mediterranean calcareous grassland
Semi-natural calcareous grasslands are of great interest in conservation because of their high species richness, but presently they are threatened by both land abandonment and nitrogen eutrophication. The paper reports on a three-year field experiment conducted in a species-rich Mediterranean grassland to study the effects of nitrogen application coupled with removal of plant litter and artific...
متن کاملCalifornia native and exotic perennial grasses differ in their response to soil nitrogen, exotic annual grass density, and order of emergence Citation
49 Early emergence of plant seedlings can offer strong competitive advantages over 50 later-germinating neighbors through the preemption of limiting resources. This 51 phenomenon may have contributed to the persistent dominance of European annual 52 grasses over native perennial grasses in California grasslands, since the former 53 species typically germinate earlier in the growing season than ...
متن کاملTradeoffs and thresholds in the effects of nitrogen addition on biodiversity and ecosystem functioning: evidence from inner Mongolia Grasslands
Nitrogen (N) deposition is widely considered an environmental problem that leads to biodiversity loss and reduced ecosystem resilience; but, N fertilization has also been used as a management tool for enhancing primary production and ground cover, thereby promoting the restoration of degraded lands. However, empirical evaluation of these contrasting impacts is lacking. We tested the dual effect...
متن کاملLeaf gas exchange responses of 13 prairie grassland species to elevated CO 2 and increased nitrogen supply
• Leaf gas exchange responses to elevated CO 2 and N are presented for 13 perennial species, representing four functional groups: C 3 grasses, C 4 grasses, legumes, and nonleguminous forbs. Understanding how CO 2 and N effects interact is important to predict plant community response to global change. • Plants were field-grown in monoculture under current ambient and elevated (560 μ mol mol − 1...
متن کاملPlant water use affects competition for nitrogen: why drought favors invasive species in California.
Abstract: Classic resource competition theory typically treats resource supply rates as independent; however, nutrient supplies can be affected by plants indirectly, with important consequences for model predictions. We demonstrate this general phenomenon by using a model in which competition for nitrogen is mediated by soil moisture, with competitive outcomes including coexistence and multiple...
متن کامل