Leaf economics fundamentals explained by optimality principles.

Autor: Wang H; Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing 100084, China., Prentice IC; Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing 100084, China.; Georgina Mace Centre for the Living Planet, Department of Life Sciences, Imperial College London, Silwood Park Campus, Buckhurst Road, Ascot SL5 7PY, UK.; School of Natural Sciences, Macquarie University, North Ryde, NSW 2109, Australia., Wright IJ; School of Natural Sciences, Macquarie University, North Ryde, NSW 2109, Australia.; Hawkesbury Institute for the Environment, Western Sydney University, Penrith 2751, Australia., Warton DI; School of Mathematics and Statistics and Evolution and Ecology Research Center, UNSW Sydney, Sidney, NSW 2052, Australia., Qiao S; Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing 100084, China., Xu X; Ecology and Evolutionary Biology, Cornell University, E139 Corson Hall, Ithaca, NY 14850, USA., Zhou J; Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing 100084, China., Kikuzawa K; Laboratory of Plant Ecology, Ishikawa Prefectural University, Nonoichi, Ishikawa 921-8836, Japan., Stenseth NC; Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing 100084, China.; Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biosciences, University of Oslo, P.O. Box 1066 Blindern, Oslo NO-0316, Norway.
Jazyk: angličtina
Zdroj: Science advances [Sci Adv] 2023 Jan 18; Vol. 9 (3), pp. eadd5667. Date of Electronic Publication: 2023 Jan 18.
DOI: 10.1126/sciadv.add5667
Abstrakt: The life span of leaves increases with their mass per unit area (LMA). It is unclear why. Here, we show that this empirical generalization (the foundation of the worldwide leaf economics spectrum) is a consequence of natural selection, maximizing average net carbon gain over the leaf life cycle. Analyzing two large leaf trait datasets, we show that evergreen and deciduous species with diverse construction costs (assumed proportional to LMA) are selected by light, temperature, and growing-season length in different, but predictable, ways. We quantitatively explain the observed divergent latitudinal trends in evergreen and deciduous LMA and show how local distributions of LMA arise by selection under different environmental conditions acting on the species pool. These results illustrate how optimality principles can underpin a new theory for plant geography and terrestrial carbon dynamics.
Databáze: MEDLINE