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Why are graminoid species more dominant? Trait‐mediated plant–soil feedbacks shape community composition

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Datum

2024

Autor:innen

De Long, Jonathan R.
Yan, Xuebin
Wang, Xiaoyi
Wang, Chunlong
Zhang, Yiwei
et al.

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National Natural Science Foundation of China: 31971435
National Natural Science Foundation of China: 32271607

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Open Access-Veröffentlichung
Core Facility der Universität Konstanz

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Ecology. Wiley. 2024, 105(6), e4295. ISSN 0012-9658. eISSN 1939-9170. Verfügbar unter: doi: 10.1002/ecy.4295

Zusammenfassung

Abstract Species traits may determine plant interactions along with soil microbiome, further shaping plant–soil feedbacks (PSFs). However, how plant traits modulate PSFs and, consequently, the dominance of plant functional groups remains unclear. We used a combination of field surveys and a two‐phase PSF experiment to investigate whether forbs and graminoids differed in PSFs and in their trait–PSF associations. When grown in forb‐conditioned soils, forbs experienced stronger negative feedbacks, while graminoids experienced positive feedbacks. Graminoid‐conditioned soil resulted in neutral PSFs for both functional types. Forbs with thin roots and small seeds showed more‐negative PSFs than those with thick roots and large seeds. Conversely, graminoids with acquisitive root and leaf traits (i.e., thin roots and thin leaves) demonstrated greater positive PSFs than graminoids with thick roots and tough leaves. By distinguishing overall and soil biota‐mediated PSFs, we found that the associations between plant traits and PSFs within both functional groups were mainly mediated by soil biota. A simulation model demonstrated that such differences in PSFs could lead to a dominance of graminoids over forbs in natural plant communities, which might explain why graminoids dominate in grasslands. Our study provides new insights into the differentiation and adaptation of plant life‐history strategies under selection pressures imposed by soil biota.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
570 Biowissenschaften, Biologie

Schlagwörter

forbs, functional group dominance, graminoids, plant functional traits, plant ruderality, plant-soil feedbacks, root economic spectrum

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ISO 690HUANG, Kailing, Jonathan R. DE LONG, Xuebin YAN, Xiaoyi WANG, Chunlong WANG, Yiwei ZHANG, Mark VAN KLEUNEN, 2024. Why are graminoid species more dominant? Trait‐mediated plant–soil feedbacks shape community composition. In: Ecology. Wiley. 2024, 105(6), e4295. ISSN 0012-9658. eISSN 1939-9170. Verfügbar unter: doi: 10.1002/ecy.4295
BibTex
@article{Huang2024-06grami-70008,
  year={2024},
  doi={10.1002/ecy.4295},
  title={Why are graminoid species more dominant? <scp>T</scp>rait‐mediated plant–soil feedbacks shape community composition},
  number={6},
  volume={105},
  issn={0012-9658},
  journal={Ecology},
  author={Huang, Kailing and De Long, Jonathan R. and Yan, Xuebin and Wang, Xiaoyi and Wang, Chunlong and Zhang, Yiwei and van Kleunen, Mark},
  note={Article Number: e4295}
}
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