气候变化领域集成服务门户(CCPortal): Changes in tree structure, composition, and diversity of a mixed-dipterocarp rainforest over a 40-year period

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DOI	10.1016/j.foreco.2019.117764
	Changes in tree structure, composition, and diversity of a mixed-dipterocarp rainforest over a 40-year period
	Ediriweera S.; Bandara C.; Woodbury D.J.; Mi X.; Gunatilleke I.A.U.N.; Gunatilleke C.V.S.; Ashton M.S.
发表日期	2020
ISSN	0378-1127
卷号	458
英文摘要	Little work has examined the spatial and temporal changes of a tropical rain forest for long time periods. Here, we present an analysis of long-term plot data from a Sri Lankan Mixed-Dipterocarp forest (MDF). The plots were established in 1978 at three different elevations (low - 335m, medium - 560 m, and high - 915 m). At each site we measured all trees ≥ 10 cm DBH in 16 or 18 plots. The total area sampled amounted to 12.5 ha. We recorded 166 tree species, with each site comprising between 95 and 121 species. Stem densities and basal areas were different among sites, and declined over the period from 642.8 stems ha−1 and 41.8 m2 ha−1 for the 1978 census, to 496.2 stems ha−1 and 35.2 m2 ha−1 for the 2018 census. The lowest elevation exhibited the highest recruitment, mortality and turnover among sites but patterns changed and became less marked over time. Forest wide tree recruitment was about 1% y−1, while mortality was twice as much averaging about 2% y−1. Four families made up between 44% (1978 census) and 54% (2018 census) of the trees sampled. Two families – Clusiaceae, Dipterocarpaceae contributed up to 33.4% and 37.3% respectively, depending upon site and year of census. The five most common species represent between 31 and 54% of the basal area and between 25 and 66% of the stem density depending upon site. Percentage dominance by the most common species increased over the 40-year time period. Though many trees showed some degree of spatial differentiation, canopy trees showed greater site overlap in their distribution than understory and sub-canopy species. Our results provide an improved picture of variations in MDF structure and composition across the ever-wet realms of equatorial south and southeast Asia. We suggest that dominance in dipterocarps and the degree of closed canopy structure, as measured by basal area, is influenced by time, elevation, the degree of topographic variability within elevation, and topographic interactions with variabilities in climate (drought and windstorms). We propose higher standing basal areas and super dominance of dipterocarps in MDF are linked to site, succession, and landform stability. Dipterocarps increase in dominance with succession (time), with topography (ridges greater than valleys) and with elevation (lowland < hill < lower montane). © 2019 Elsevier B.V.
英文关键词	Borneo; Climate change; Elevation; Forest dynamics; Forest productivity; Mesua spp.; Shorea spp.; South Asia; Sri Lanka; Tree diversity; Tree mortality; Tree recruitment
语种	英语
scopus关键词	Climate change; Storms; Surveys; Topography; Borneo; Elevation; Forest dynamics; Forest productivity; Mesua spp; Shorea spp; South Asia; Sri Lanka; Tree diversity; Tree mortality; Tree recruitments; Forestry; basal area; canopy architecture; climate change; community composition; elevation; forest dynamics; forestry production; long-term change; mixed forest; mortality; rainforest; species diversity; stand structure; temporal variation; Borneo; Forestry; South Asia; Sri Lanka; Surveys; Topography; Borneo; South Asia; Sri Lanka; Clusiaceae; Dipterocarpaceae; Mesua; Shorea
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155519
作者单位	Department of Science and Technology, Uva Wellassa University, Badulla, Sri Lanka; School of Forestry and Environmental Studies, Yale University, New Haven, CT 06511, United States; State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, 20 Nanxincun, Xiangshan, Beijing, 100093, China; Botany Department, University of Peradeniya, Peradeniya, Sri Lanka
推荐引用方式 GB/T 7714	Ediriweera S.,Bandara C.,Woodbury D.J.,et al. Changes in tree structure, composition, and diversity of a mixed-dipterocarp rainforest over a 40-year period[J],2020,458.
APA	Ediriweera S..,Bandara C..,Woodbury D.J..,Mi X..,Gunatilleke I.A.U.N..,...&Ashton M.S..(2020).Changes in tree structure, composition, and diversity of a mixed-dipterocarp rainforest over a 40-year period.Forest Ecology and Management,458.
MLA	Ediriweera S.,et al."Changes in tree structure, composition, and diversity of a mixed-dipterocarp rainforest over a 40-year period".Forest Ecology and Management 458(2020).