skip to main content

DOE PAGESDOE PAGES

  • DOE PAGES
  • Published Article: Elevated carbon dioxide is predicted to promote coexistence among competing species in a trait-based model

Title: Elevated carbon dioxide is predicted to promote coexistence among competing species in a trait-based model

Differential species responses to atmospheric CO2 concentration (Ca) could lead to quantitative changes in competition among species and community composition, with flow-on effects for ecosystem function. However, there has been little theoretical analysis of how elevated Ca (eCa) will affect plant competition, or how composition of plant communities might change. Such theoretical analysis is needed for developing testable hypotheses to frame experimental research. Here, we investigated theoretically how plant competition might change under eCa by implementing two alternative competition theories, resource use theory and resource capture theory, in a plant carbon and nitrogen cycling model. The model makes several novel predictions for the impact of eCa on plant community composition. Using resource use theory, the model predicts that eCa is unlikely to change species dominance in competition, but is likely to increase coexistence among species. Using resource capture theory, the model predicts that eCa may increase community evenness. Collectively, both theories suggest that eCa will favor coexistence and hence that species diversity should increase with eCa. Our theoretical analysis leads to a novel hypothesis for the impact of eCa on plant community composition. In this study, the hypothesis has potential to help guide the design and interpretation of eCa experiments.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5]
+ Show Author Affiliations
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of California, Irvine, CA (United States); Macquarie Univ., North Ryde (Australia)
  2. Macquarie Univ., North Ryde (Australia); Univ. of Western Sydney, Penrith (Australia)
  3. Macquarie Univ., North Ryde (Australia); Centre d'Ecologie Fonctionnelle et Evolutive, Montepellier (France); Museum National d'Histoire Naturelle, Paris (France)
  4. Univ. of Western Sydney, Penrith (Australia)
  5. Univ. of Western Sydney, Penrith (Australia); Univ. of Minnesota, St. Paul, MN (United States)
Publication Date:
Grant/Contract Number:
DP1094791; FG02-96ER62291; FC02-06ER64158; 0322057; 9411972; 0080382; 0620652; 0716587; DOE/DE-FG02-96ER62291
Type:
Published Article
Journal Name:
Ecology and Evolution
Additional Journal Information:
Journal Name: Ecology and Evolution; Journal ID: ISSN 2045-7758
Publisher:
Wiley
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; elevated CO2; plant competition; species diversity; species traits
OSTI Identifier:
1223042
Alternate Identifier(s):
OSTI ID: 1222601; OSTI ID: 1223043