Nitrogen addition and harvest frequency rather than initial plant species composition, determine vertical structure and light interception in permanent grasslands

View over the experimental area in the Solling Uplands (Germany). Β© U. Petersen
View over the experimental area in the Solling Uplands (Germany). Β© U. Petersen

Recent biodiversity experiments using sown plant communities suggest a positive effect of plant species diversity on ecosystem functioning and resource use. However, are these experimental results applicable to agriculturally managed grassland? In a new study published in AoB PLANTS, Petersen and Isselstein analysed vegetation structure and light interception in managed grassland in which species composition had been manipulated by herbicides. They expected the functionally more diverse plots (grasses and forbs in equal amounts) to better intercept the light than plots containing more than 90% grasses due to an optimal arrangement of leaves in space. However, management (fertilization and mowing regime) had a much stronger influence on structure and light interception than plant species composition.


AoB PLANTS is an open-access, online journal that publishes peer-reviewed articles on all aspects of environmental and evolutionary biology. Published by Oxford University Press, AoB PLANTS provides a fast-track pathway for publishing high-quality research, where papers are available online to anyone, anywhere free of charge. Reasons to publish in AoB PLANTS include double-blind peer review of manuscripts, rapid processing time and low open-access charges.

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