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Modifying regeneration strategies classification to enhance the understanding of dominant species growth in fire-prone forest in Southwest China

引用

Forest Ecosystems 2022年第1期9卷 94-102页

作者： Caifang Luo Yueqiang Liu Zehao Shen Kang Yang Xinpei Wang Youxu Jiang Department of Ecology College of Urban and Environmental ScienceThe MOE Laboratory of Earth Surface ProcessesPeking UniversityBeijing100871China Yunnan Appraisal Center for Ecological and Environmental Engineering Kunming 650228China Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration Research Institute of Forest EcologyEnvironment and ProtectionChinese Academy of ForestryBeijing100091China

Background:In fire-prone ecosystems,plant species having different post-fire regeneration strategies(PFRS)coexist at the local scale while showing different growth *** evaluate the effect of PFRS on species regeneration,we investigated the plant communities burned in different years in the central Yunnan Province,Southwest *** indicators describing plant growth and population importance were measured to compare the regeneration of four dominant tree species,including one facultative seeders(FS)and three obligate resprouters(OR).Partial correlation and mixed linear effect modeling were applied to disentangle the contribution of intrinsic and environmental factors to the interspecific variation in post-fire ***:We identified two subtypes of plant growth strategy in the early post-fire stage for OR species;i.e.,number growth(ORþN)priority and height growth(ORþH)priority for sprouting ***,the FS and OR species varied in height growth rate with different temporal *** ORþN species occupied post-fire space horizontally with more resprouts and larger coverage than ORþH and FS species at the earlier *** contrast,the ORþH species generally had far less resprouts per clump,more variations in stem height and basal *** analysis showed that the variation of post-fire plant regeneration was not effectively explained by environmental factors(R2regeneration dynamics and growth priorities in the four dominant tree species indicated a critical dichotomy of habitat occupation strategy for the resprouter species during the early stage of post-fire forest *** study uncovered a trade-off between height versus number growth priority in the post-fire tree growth strategy and provides a novel perspective in understanding the living space occupying(niche partit

关键词： post-fire regeneration strategies Species coexistence Growth priority Subtropical forest Facultative seeder Obligate resprouter

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