生态学报2023，Vol.43Issue(24)：10345-10362,18.DOI:10.20103/j.stxb.202306261358
基于优化MaxEnt模型的中国紫堇属植物生境适宜性研究
Habitat suitability of Corydalis based on the optimized MaxEnt model in China
摘要
Abstract
Climate change significantly impacts plant distribution,predicting the potential suitable areas of Corydalis is useful for understanding the effects of climate change,and it is vital for the development of conservation strategy of Corydalis.Using the optimized MaxEnt model,we projected potential suitable areas for 1910 Corydalis distribution sites along with 22 environmental factors.We examined key environmental factors influencing Corydalis distribution and forecasted their effects during the last glacial maximum(LGM),the present,and future scenarios.Additionally,we forecasted the spatial distribution pattern and center-of-mass migration trends of Corydalis under two greenhouse gas(GHG)emission scenarios(SSP126 and SSP585)during the LGM,current,future,and future periods(2021-2100).Furthermore,we assessed the current conservation status of Corydalis and conducted a conservation analysis.The results indicated the following:(1)The optimized model parameters included RM=1.4 and FC=LQPT,resulting in the lowest complexity and overfitting in the MaxEnt model and high predictive accuracy with AUC=0.793.(2)The primary environmental factors affecting the distribution of Corydalis were temperature annual range(bio7),Seasonal variation coefficient of temperature(bio4),annual precipitation(bio12)and mean diurnal range(bio2).Among these,temperature was the most influential environmental factor on Corydalis distribution.(3)Corydalis currently inhabit abroad region across China,spanning the climatic zones of northern subtropics,southern subtropics,mesothermal,southern temperate,and high plateau areas.In contrast,the potential suitable area of Corydalis has fluctuated significantly,generally expanding towards plateau areas and mid-temperate regions,and the size is growing.However,with rising GHG concentrations,habitat fragmentation is becoming more severe.Center-of-mass migration results also suggest that the potential suitable area of Corydalis will shift northwestward in the future.(4)The East Himalayan region and the Hengduan Mountains region in China is crucial for Corydalis conservation.However,the nature reserve area in this region is limited and fragmented,thus conservation efforts is needed in this area,and nature reserves in northwest China should also should strengthen.关键词
气候变化/物种适应性/物种分布格局/青藏高原/紫堇属Key words
climate change/species adaptability/species distribution patterns/Qinghai-Tibetan plateau/Corydalis引用本文复制引用
陈程浩,龙主多杰,陆徐伟,宋扎磋,苗琪,孙芳慧,索南吉..基于优化MaxEnt模型的中国紫堇属植物生境适宜性研究[J].生态学报,2023,43(24):10345-10362,18.基金项目
国家自然科学基金"青藏高原高寒植物对低温的抗性及其与系统演化的关系"(32160285) （32160285）
青海省科技厅自然科学基金青年项目"极端降温事件对青藏高原高寒草甸主要植物开花期的影响研究"(2020-ZJ-952Q) （2020-ZJ-952Q）
