Plant invasions differentially affected by diversity and dominant species in native- and exotic-dominated grasslands

Thumbnail Image
Date
2015-11-17
Authors
Xu, Xia
Polley, H.
Hofmockel, Kirsten
Daneshgar, Pedran
Wilsey, Brian
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Person
Wilsey, Brian
Professor
Research Projects
Organizational Units
Journal Issue
Is Version Of
Versions
Series
Department
Ecology, Evolution and Organismal Biology
Abstract

Plant invasions are an increasingly serious global concern, especially as the climate changes. Here, we explored how plant invasions differed between native- and novel exotic-dominated grasslands with experimental addition of summer precipitation in Texas in 2009. Exotic species greened up earlier than natives by an average of 18 days. This was associated with a lower invasion rate early in the growing season compared to native communities. However, invasion rate did not differ significantly between native and exotic communities across all sampling times. The predictors of invasion rate differed between native and exotic communities, with invasion being negatively influenced by species richness in natives and by dominant species in exotics. Interestingly, plant invasions matched the bimodal pattern of precipitation in Temple, Texas, and did not respond to the pulse of precipitation during the summer. Our results suggest that we will need to take different approaches in understanding of invasion between native and exotic grasslands. Moreover, with anticipated increasing variability in precipitation under global climate change, plant invasions may be constrained in their response if the precipitation pulses fall outside the normal growing period of invaders.

Comments

This article is published as Xu, Xia, H. Wayne Polley, Kirsten Hofmockel, Pedram P. Daneshgar, and Brian J. Wilsey. "Plant invasions differentially affected by diversity and dominant species in native‐and exotic‐dominated grasslands." Ecology and evolution 5, no. 23 (2015): 5662-5670. doi: 10.1002/ece3.1830. Posted with permission.

Description
Keywords
Citation
DOI
Copyright
Collections