期刊
FRONTIERS IN PLANT SCIENCE
卷 13, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2022.925296
关键词
biodiversity hotspots; biomod2; climate change; glasshouse; range shifts; Rheum
资金
- 'CAS President's International Fellowship Initiative' (PIFI) postdoctoral fellowship [2021PB0034]
- Second Tibetan Plateau Scientific Expedition and Research (STEP) program [2019QZKK0502]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA20050203]
- National Natural Science Foundation of China [31770249, 32071669, 32150410356]
- Key Projects of the Joint Fund of the National Natural Science Foundation of China [U1802232]
Global warming is pushing alpine plants towards mountaintops, increasing the risk of extinction. Two alpine 'glasshouse' species have shown significant range shifts in response to climate change, mainly driven by precipitation. This study highlights the importance of conservation efforts for these species.
Alpine plants' distribution is being pushed higher towards mountaintops due to global warming, finally diminishing their range and thereby increasing the risk of extinction. Plants with specialized 'glasshouse' structures have adapted well to harsh alpine environments, notably to the extremely low temperatures, which makes them vulnerable to global warming. However, their response to global warming is quite unexplored. Therefore, by compiling occurrences and several environmental strata, we utilized multiple ensemble species distribution modeling (eSDM) to estimate the historical, present-day, and future distribution of two alpine 'glasshouse' species Rheum nobile Hook. f. & Thomson and R. alexandrae Batalin. Rheum nobile was predicted to extend its distribution from the Eastern Himalaya (EH) to the Hengduan Mountains (HM), whereas R. alexandrae was restricted exclusively in the HM. Both species witnessed a northward expansion of suitable habitats followed by a southerly retreat in the HM region. Our findings reveal that both species have a considerable range shift under different climate change scenarios, mainly triggered by precipitation rather than temperature. The model predicted northward and upward migration for both species since the last glacial period which is mainly due to expected future climate change scenarios. Further, the observed niche overlap between the two species presented that they are more divergent depending on their habitat, except for certain regions in the HM. However, relocating appropriate habitats to the north and high elevation may not ensure the species' survival, as it needs to adapt to the extreme climatic circumstances in alpine habitats. Therefore, we advocate for more conservation efforts in these biodiversity hotspots.
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