Seedling emergence and environmental filters determine Ficus recruitment in a subtropical landscape
文献类型:期刊论文
作者 | Castillo-Diaz, Diana; Chen, Huayang4,5; Harrison, Rhett D.; Wen, Bin2![]() |
刊名 | FOREST ECOLOGY AND MANAGEMENT
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出版日期 | 2021 |
卷号 | 497期号:x页码:- |
关键词 | Seed germination Seedling emergence Seedling establishment Seedling recruitment Canopy openness Regeneration niche Soil conditions Elevation gradient |
ISSN号 | 0378-1127 |
DOI | 10.1016/j.foreco.2021.119536 |
英文摘要 | Early regeneration, involving the transition from a seed into a successfully recruited seedling, is a complex process characterized by high mortality rates and the strong association with environmental filters. However, we have limited understanding of the factors and transitional regeneration stages that lead to these broad mortality events, even in species that are key for ecosystem function and comprise the bulk of species in diversity as-sessments, such as Ficus species. Using eight, 1-ha long term monitoring plots, established along an elevation gradient in tropical to subtropical forests in southern China, and partitioning the early plant regeneration process into four stages (seed germination, seedling emergence, establishment and recruitment), we conducted a seed addition experiment to assess the factors driving the early regeneration process. We used four hemi-epiphytic and four non-hemiepiphytic Ficus species, specifically asking whether elevation, microsite conditions and growth form affect the success of regeneration outcomes. We observed that Ficus early regeneration was highly limited throughout the subtropical landscape with similar seed germination probabilities along all elevations, but greater seedling emergence at higher elevations. Growth form and elevation interacted significantly during seed germination and seedling emergence stages. The strongest filtering effect was observed during seedling emer-gence, with greater canopy openness facilitating, but drier and cooler soils being less conducive to seedling emergence, especially for hemiepiphytic species. Once emerged, Ficus seedlings were released from the envi-ronmental filters assessed here, yet, continued to face successively greater mortality during establishment and recruitment. Greater seed germination and seedling emergence on the ground observed in hemiepiphytes indi-cate that they may benefit from evolutionary traits associated with canopy regeneration under water and tem-perature stress, but only at the early regeneration stages, as seedling establishment and recruitment were similar in both groups. In general, our results demonstrate that even when seeds are available, successful recruitment is strongly limited by microsite conditions and growth form, through filtering mechanisms associated with the transition from seedling emergence to seedling establishment. The identification of environmental filters that operate during the complex and vulnerable early regeneration stages provides a baseline to develop management strategies for ex situ conservation, as well as in situ population reestablishment for restoration. |
学科主题 | Forestry |
语种 | 英语 |
WOS记录号 | WOS:000684974200005 |
源URL | [http://ir.xtbg.org.cn/handle/353005/12391] ![]() |
专题 | 西双版纳热带植物园_支撑系统 |
作者单位 | 1.Chinese Acad Sci, Ctr Integrat Conservat, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China 2.Harrison, Rhett D.] East & Southern Africa Reg Off, World Agroforestry ICRAF, Lusaka, Zambia 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 4.Int Union Conservat Nat, Species Survival Commiss, Seed Conservat Specialist Grp, CH-281196 Gland, Switzerland 5.Guangxi Univ, Coll Forestry, State Key Lab Conservat & Utilizat Subtrop Agrobi, Daxuedonglu 100, Nanning 530004, Guangxi, Peoples R China 6.Guangxi Univ, Coll Forestry, Guangxi Key Lab Forest Ecol & Conservat, Daxuedonglu 100, Nanning 530004, Guangxi, Peoples R China |
推荐引用方式 GB/T 7714 | Castillo-Diaz, Diana,Chen, Huayang,Harrison, Rhett D.,et al. Seedling emergence and environmental filters determine Ficus recruitment in a subtropical landscape[J]. FOREST ECOLOGY AND MANAGEMENT,2021,497(x):-. |
APA | Castillo-Diaz, Diana,Chen, Huayang,Harrison, Rhett D.,Wen, Bin,&Goodale, Uromi Manage.(2021).Seedling emergence and environmental filters determine Ficus recruitment in a subtropical landscape.FOREST ECOLOGY AND MANAGEMENT,497(x),-. |
MLA | Castillo-Diaz, Diana,et al."Seedling emergence and environmental filters determine Ficus recruitment in a subtropical landscape".FOREST ECOLOGY AND MANAGEMENT 497.x(2021):-. |
入库方式: OAI收割
来源:西双版纳热带植物园
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