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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. |
| 关键词 | Climate changeStormsSurveysTopographyBorneoElevationForest dynamicsForest productivityMesua sppShorea sppSouth AsiaSri LankaTree diversityTree mortalityTree recruitmentsForestrybasal areacanopy architectureclimate changecommunity compositionelevationforest dynamicsforestry productionlong-term changemixed forestmortalityrainforestspecies diversitystand structuretemporal variationBorneoForestrySouth AsiaSri LankaSurveysTopographyBorneoSouth AsiaSri LankaClusiaceaeDipterocarpaceaeMesuaShorea |
| 语种 | 英语 |
| 来源机构 | Forest Ecology and Management |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/133055 |
| 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]. Forest Ecology and Management,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.,458. |
| MLA | Ediriweera S.,et al."Changes in tree structure, composition, and diversity of a mixed-dipterocarp rainforest over a 40-year period".458(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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