Download the full-sized PDF
Permanent link (DOI): https://doi.org/10.7939/R3H41K12Q
This file is in the following communities:
|Agricultural, Food and Nutritional Science, Department of|
This file is in the following collections:
|Journal Articles (Agricultural, Food and Nutritional Science)|
Direct and indirect drivers of plant diversity responses to climate and clipping across northern temperate grassland Open Access
- Author or creator
White, Shannon R.
Bork, Edward W.
Cahill, James F.
- Additional contributors
Structural Equation Modeling
- Type of item
- Journal Article (Published)
It is well known that climate can influence plant community assembly via a multitude of indirect and direct pathways. However, interpretations of plant diversity responses to simulated climate change experiments, and subsequent predictions of plant communities under future climate scenarios, rarely address the importance of indirect effects. Networks of direct and indirect effects are also critical in understanding linkages between climate and grazing, a common land use of grasslands, and implications for plant diversity. We characterized the roles of indirect vs. direct effects in determining plant diversity responses to climate and grazing using data from three northern temperate grasslands in which we conducted factorial experiments manipulating precipitation, air temperature, and clipping intensity. Utilizing a structural equation modeling framework to address the multivariate networks, we found warming operated directly, causing species loss at all sites. We identified shoot biomass as the key indirect driver of diversity loss in response to both precipitation and clipping, regardless of site. However, site-specific contingencies in the network of interactions were important for understanding varied precipitation effects. At the driest site only, shoot biomass was resistant to reduced precipitation, and diversity was consequently unaltered. Similarly, disconnect between primary drivers and responses explained relatively idiosyncratic responses of evenness compared to richness. Importantly, the finding of widespread, directly controlled plant diversity loss with warming aligns with concerns about declining biodiversity under climate change. However, using a framework of network interactions also allowed us to pinpoint the source of variability in response across systems. Looking forward, we can use the identification of this key indirect pathway to guide an understanding of community assembly under factors likely to control shoot biomass. Viewing a multifactorial, multisite experimental approach through a framework of network interactions allowed us to both identify generalized responses and distill the complexity of contingent responses. This, along with the practical need to identify diversity responses to climate change and grazing, underscores the importance of understanding both indirect and direct drivers of ecosystem responses to global change factors.
- Date created
- License information
- Copyright © 2014 by the Ecological Society of America. All rights reserved.
- Citation for previous publication
White, S. R., Bork, E. W., & Cahill, J. F. (2014). Direct and indirect drivers of plant diversity responses to climate and clipping across northern temperate grassland. Ecology, 95(11), 3093-3103. http://dx.doi.org/10.1890/14-0144.1
- Link to related item
- Date Uploaded
- Date Modified
- Audit Status
- Audits have not yet been run on this file.
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 453210
Last modified: 2017:09:06 16:19:37-06:00
Original checksum: de496a9f9ec57f8d3d104e36b075360d
Well formed: true
File title: Direct and indirect drivers of plant diversity responses to climate and clipping across northern temperate grassland
File author: prodmgr
Page count: 11