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- Title
Biodiversity explains maximum variation in productivity under experimental warming, nitrogen addition, and grazing in mountain grasslands.
- Authors
Liu, Jiajia; Liu, Detuan; Xu, Kun; Gao, Lian‐ming; Ge, Xue‐jun; Burgess, Kevin S.; Cadotte, Marc W.
- Abstract
Anthropogenic global warming, nitrogen addition, and overgrazing alter plant communities and threaten plant biodiversity, potentially impacting community productivity, especially in sensitive mountain grassland ecosystems. However, it still remains unknown whether the relationship between plant biodiversity and community productivity varies across different anthropogenic influences, and especially how changes in multiple biodiversity facets drive these impacts on productivity. Here, we measured different facets of biodiversity including functional and phylogenetic richness and evenness in mountain grasslands along an environmental gradient of elevation in Yulong Mountain, Yunnan, China. We combined biodiversity metrics in a series of linear mixed‐effect models to determine the most parsimonious predictors for productivity, which was estimated by aboveground biomass in community. We examined how biodiversity–productivity relationships were affected by experimental warming, nitrogen addition, and livestock‐grazing. Species richness, phylogenetic diversity, and single functional traits (leaf nitrogen content, mg/g) represented the most parsimonious combination in these scenarios, supporting a consensus that single‐biodiversity metrics alone cannot fully explain ecosystem function. The biodiversity–productivity relationships were positive and strong, but the effects of treatment on biodiversity–productivity relationship were negligible. Our findings indicate that the strong biodiversity–productivity relationships are consistent in various anthropogenic drivers of environmental change. Our study emphasized the strong and consistent effects of biodiversity on productivity under experimental warming, nitrogen addition, and grazing in mountain grasslands. Here, species richness, phylogenetic diversity, and single functional traits represented the most parsimonious combinations in various anthropogenic drivers of environmental change.
- Subjects
PLANT diversity; GLOBAL warming; NITROGEN &; the environment; PHYLOGENETIC models; GRASSLAND plants; GRAZING &; the environment
- Publication
Ecology & Evolution (20457758), 2018, Vol 8, Issue 20, p10094
- ISSN
2045-7758
- Publication type
Article
- DOI
10.1002/ece3.4483