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Title: Intraspecific Trait Variation and Phenotypic Plasticity Mediate Alpine Plant Species Response to Climate Change

Journal Article · · Frontiers in Plant Science
 [1];  [2];  [2];  [3];  [4];  [2];  [5];  [6];  [2];  [3];  [7];  [7];  [3]
  1. Univ. of Wisconsin, Madison, WI (United States). Dept. of Integrative Biology; DOE/OSTI
  2. Univ. of Arizona, Tucson, AZ (United States). Dept. of Ecology and Evolutionary Biology
  3. Univ. of Bergen (Norway). Dept. of Biological Sciences; Univ. of Bergen (Norway). Bjerknes Centre for Climate Research
  4. Norwegian Univ. of Life Sciences, Ås (Norway). Faculty of Environmental Sciences and Natural Resource Management
  5. Univ. of British Columbia, Vancouver, BC (Canada). Dept. of Botany and Biodiversity Research Centre; Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Earth and Environmental Sciences Division
  6. Univ. of Bergen (Norway). Dept. of Biological Sciences
  7. Inst. of Mountain Hazards and Environment (CAS), Chengdu (China)

In a rapidly changing climate, alpine plants may persist by adapting to new conditions. However, the rate at which the climate is changing might exceed the rate of adaptation through evolutionary processes in long-lived plants. Persistence may depend on phenotypic plasticity in morphology and physiology. Here we investigated patterns of leaf trait variation including leaf area, leaf thickness, specific leaf area, leaf dry matter content, leaf nutrients (C, N, P) and isotopes (δ 13C and δ 15N) across an elevation gradient on Gongga Mountain, Sichuan Province, China. We quantified inter- and intra-specific trait variation and the plasticity in leaf traits of selected species to experimental warming and cooling by using a reciprocal transplantation approach. We found substantial phenotypic plasticity in most functional traits where δ 15N, leaf area, and leaf P showed greatest plasticity. These traits did not correspond with traits with the largest amount of intraspecific variation. Plasticity in leaf functional traits tended to enable plant populations to shift their trait values toward the mean values of a transplanted plants’ destination community, but only if that population started with very different trait values. These results suggest that leaf trait plasticity is an important mechanism for enabling plants to persist within communities and to better tolerate changing environmental conditions under climate change.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Earth and Environmental Systems Science Division
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1628289
Journal Information:
Frontiers in Plant Science, Journal Name: Frontiers in Plant Science Vol. 9; ISSN 1664-462X
Publisher:
Frontiers Research FoundationCopyright Statement
Country of Publication:
United States
Language:
English

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