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Will climate change cause the global peatland to expand or contract? Evidence from the habitat shift pattern of Sphagnum mosses

Ma, Xiao‐Ying ; Xu, Hao ; Cao, Zi‐Yin ; Shu, Lei ; Zhu, Rui‐Liang

Global change biology, 2022-11, Vol.28 (21), p.6419-6432 [Periódico revisado por pares]

Oxford: Blackwell Publishing Ltd

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  • Título:
    Will climate change cause the global peatland to expand or contract? Evidence from the habitat shift pattern of Sphagnum mosses
  • Autor: Ma, Xiao‐Ying ; Xu, Hao ; Cao, Zi‐Yin ; Shu, Lei ; Zhu, Rui‐Liang
  • Assuntos: Aquatic plants ; bog ; Bogs ; Bryophyta ; Calcium ; Calcium carbonate ; Calcium carbonates ; Carbon ; Carbon cycle ; carbon sink ; Carbon sinks ; Carbon sources ; Carbonates ; Climate change ; climate warming ; Environmental impact ; Geographical distribution ; Global warming ; Greenhouse effect ; Greenhouse gases ; Habitat availability ; Habitats ; Latitude ; MaxEnt ; Mosses ; Peat ; peat moss ; Peatlands ; Sphagnum ; Temperature ; Topsoil
  • É parte de: Global change biology, 2022-11, Vol.28 (21), p.6419-6432
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
  • Descrição: Peatlands play a crucial role in the global carbon cycle. Sphagnum mosses (peat mosses) are considered to be the peatland ecosystem engineers and contribute to the carbon accumulation in the peatland ecosystems. As cold‐adapted species, the dominance of Sphagnum mosses in peatlands will be threatened by climate warming. The response of Sphagnum mosses to climate change is closely related to the future trajectory of carbon fluxes in peatlands. However, the impact of climate change on the habitat suitability of Sphagnum mosses on a global scale is poorly understood. To predict the potential impact of climate change on the global distribution of Sphagnum mosses, we used the MaxEnt model to predict the potential geographic distribution of six Sphagnum species that dominate peatlands in the future (2050 and 2070) under two greenhouse gas emission scenarios (SSP1‐2.6 and SSP5‐8.5). The results show that the mean temperature of the coldest quarter, precipitation of the driest month, and topsoil calcium carbonate are the main factors affecting the habitat availability of Sphagnum mosses. As the climate warms, Sphagnum mosses tend to migrate northward. The suitable habitat and abundance of Sphagnum mosses increase extensively in the high‐latitude boreal peatland (north of 50°N) and decrease on a large scale beyond the high‐latitude boreal peatland. The southern edge of boreal peatlands would experience the greatest decline in the suitable habitat and richness of Sphagnum mosses with the temperature rising and would be a risk area for the transition from carbon sink to carbon source. The spatial–temporal pattern changes of Sphagnum mosses simulated in this study provide a reference for the development of management and conservation strategies for Sphagnum bogs. The response of Sphagnum mosses to climate change is closely related to the future trajectory of carbon fluxes in peatlands. We simulated the potential geographic distribution of Sphagnum mosses that dominate peatlands under future climate scenarios. The results show that climate change will result in the migration of Sphagnum species northward. The southern edge of boreal peatlands would experience the greatest decline in the suitable habitat and richness of Sphagnum mosses with the temperature rising and would be a risk area for the transition from carbon sink to carbon source.
  • Editor: Oxford: Blackwell Publishing Ltd
  • Idioma: Inglês

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