Community assembly influences plant trait economic spectra and functional trade-offs at ecosystem scales

被引:1
作者
Anderegg, William R. L. [1 ,2 ]
Martinez-Vilalta, Jordi [3 ,4 ]
Mencuccini, Maurizio [3 ,5 ]
Poyatos, Rafael [3 ,4 ]
机构
[1] Univ Utah, Wilkes Ctr Climate Sci & Policy, Salt Lake City, UT 84103 USA
[2] Univ Utah, Sch Biol Sci, Salt Lake City, UT 84103 USA
[3] Ecol & Forestry Applicat Res Ctr CREAF, Cerdanyola Del Valles E08193, Catalonia, Spain
[4] Univ Autonoma Barcelona, Dept Anim Biol Plant Biol & Ecol, Cerdanyola Del Valles E08193, Catalonia, Spain
[5] Institucio Catalana Recerca & Estudis Avancats, Barcelona E08010, Catalonia, Spain
关键词
Climate change; climate extremes; carbon cycle; functional traits; EDDY-COVARIANCE MEASUREMENTS; CANOPY CONDUCTANCE; LINKING PLANT; VEGETATION; PRODUCTIVITY; BIODIVERSITY; STABILITY; FOREST; TRANSPIRATION; DIVERSITY;
D O I
10.1073/pnas.2404034121
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Plant functional traits hold the potential to greatly improve the understanding and prediction of climate impacts on ecosystems and carbon cycle feedback to climate change. Traits are commonly used to place species along a global conservative - acquisitive trade - off, yet how and if functional traits and conservative - acquisitive trade - offs scale up to mediate community and ecosystem fluxes is largely unknown. Here, we combine functional trait datasets and multibiome datasets of forest water and carbon fluxes at the species, community, and ecosystem - levels to quantify the scaling of the tradeoff between maximum flux and sensitivity to vapor pressure deficit. We find a strong conservative - acquisitive trade - off at the species scale, which weakens modestly at the community scale and largely disappears at the ecosystem scale. Functional traits, particularly plant water transport (hydraulic) traits, are strongly associated with the key dimensions of the conservative - acquisitive trade - off at community and ecosystem scales, highlighting that trait composition appears to influence community and ecosystem flux dynamics. Our findings provide a foundation for improving carbon cycle models by revealing i) that plant hydraulic traits are most strongly associated with community - and ecosystem scale flux dynamics and ii) community assembly dynamics likely need to be considered explicitly, as they give rise to ecosystem - level flux dynamics that differ substantially from trade - offs identified at the species - level.
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页数:9
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