Evolutionary lineage explains trait variation among 75 coexisting grass species.

Autor: Donnelly RC; Division of Biology, Kansas State University, Manhattan, KS, 66506, USA., Wedel ER; Division of Biology, Kansas State University, Manhattan, KS, 66506, USA., Taylor JH; Division of Biology, Kansas State University, Manhattan, KS, 66506, USA., Nippert JB; Division of Biology, Kansas State University, Manhattan, KS, 66506, USA., Helliker BR; Department of Biology, University of Pennsylvania, Philadelphia, PA, 19104, USA., Riley WJ; Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA., Still CJ; Forest Ecosystems and Society, Oregon State University, Corvallis, OR, 97331, USA., Griffith DM; Forest Ecosystems and Society, Oregon State University, Corvallis, OR, 97331, USA.; Department of Earth and Environmental Sciences, Wesleyan University, Middletown, CT, 06459, USA.
Jazyk: angličtina
Zdroj: The New phytologist [New Phytol] 2023 Aug; Vol. 239 (3), pp. 875-887. Date of Electronic Publication: 2023 Jun 07.
DOI: 10.1111/nph.18983
Abstrakt: Evolutionary history plays a key role driving patterns of trait variation across plant species. For scaling and modeling purposes, grass species are typically organized into C 3 vs C 4 plant functional types (PFTs). Plant functional type groupings may obscure important functional differences among species. Rather, grouping grasses by evolutionary lineage may better represent grass functional diversity. We measured 11 structural and physiological traits in situ from 75 grass species within the North American tallgrass prairie. We tested whether traits differed significantly among photosynthetic pathways or lineages (tribe) in annual and perennial grass species. Critically, we found evidence that grass traits varied among lineages, including independent origins of C 4 photosynthesis. Using a rigorous model selection approach, tribe was included in the top models for five of nine traits for perennial species. Tribes were separable in a multivariate and phylogenetically controlled analysis of traits, owing to coordination of important structural and ecophysiological characteristics. Our findings suggest grouping grass species by photosynthetic pathway overlooks variation in several functional traits, particularly for C 4 species. These results indicate that further assessment of lineage-based differences at other sites and across other grass species distributions may improve representation of C 4 species in trait comparison analyses and modeling investigations.
(© 2023 The Authors. New Phytologist © 2023 New Phytologist Foundation.)
Databáze: MEDLINE
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