Spatial dispersion patterns of trees in a tropical rainforest in Xishuangbanna, southwest China

Ecological Research - Tập 24 Số 5 - Trang 1117-1124 - 2009
Guoyu Lan1,2,3, Huan Zhu3, Min Cao3, Yuehua Hu2,3, Hong Wang3, Xiaobao Deng3, Shi-Shun Zhou3, Jingyun Cui3, Jikun Huang4, Youcai He4, Linyun Liu4, Hailong Xu4, Jun-Ping Song4
1Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan, 571737 People's Republic of China
2Graduate University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
3Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Xue Fu Road 88, Kunming, Yunnan, 650223 People's Republic of China
4Xishuangbanna Administration of Nature Reserves, Jinghong, 666100 People's Republic of China

Tóm tắt

AbstractSpatial dispersion patterns of trees at different life stages are an important aspect to investigate in understanding the mechanisms that facilitate species co‐existence. In this paper, Ripley's univariate L(r) and bivariate L12(r) functions were used to analyze spatial distribution patterns and spatial associations across different life stages of 131 tree species in a 20‐ha plot of a tropical rainforest in Xishuangbanna, southwest China. Our results show that: (1) Saplings of 109 (83.2%) species have a significant clumped distribution, which confirms the ubiquity of clumped spatial distributions among tropical tree species. (2) Adults of 126 (96.2%) species have a random distribution suggesting that density‐dependent mortality can make the spatial pattern of tropical trees more regular with time. (3) At small scales (0–10 m), 95 (72.5%) species have a neutral or negative sapling‐adult association, implying that there is recruitment limitation within the vicinity of their conspecific adults. The reduction in spatial clumping in going from younger to older life stages and the neutral or negative sapling‐adult association imply density‐dependent mortality in the vicinity of adult trees. In accordance with the Janzen–Connell hypothesis, such density‐dependent mortality can free up space for other species to colonize, contributing to the maintenance of species diversity.

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Tài liệu tham khảo

Ashton PS, 1998, Dynamics of tropical communities, 491

10.1023/A:1008940803073

10.2307/2346974

10.1016/S0378-1127(02)00126-3

10.1007/BF00325893

10.1111/j.1461-0248.2005.00750.x

10.1111/j.1744-7429.2006.00146.x

10.1016/S0169-5347(00)88955-7

10.1007/978-3-662-03664-8

10.1086/285412

10.2307/1941725

10.1017/S0266467400009433

10.1126/science.288.5470.1414

Connell JH, 1971, On the role of natural enemies in preventing competitive exclusion in some marine animals and in rain forest trees

10.1002/9781119115151

Diggle PJ, 1983, Statistical analysis of spatial point patterns

10.1111/j.2006.0906-7590.04675.x

10.1017/S0266467406003282

10.1038/35006630

10.2307/3237248

Hou JH, 2004, Spatial patterns and associations in a Quercus‐Betula forest in northern China, J Veg Sci, 15, 407

10.1016/j.actao.2005.10.002

10.1111/j.0269-8463.2005.00965.x

10.1098/rstb.1990.0198

10.1023/A:1009779424279

10.1086/282687

10.1016/j.foreco.2005.10.066

Lan GY, 2008, Establishment of Xishuangbanna tropical forest dynamics plot: species compositions and spatial distribution patterns, J Plant Ecol, 32, 287

Lotwick HW, 1982, Methods for analyzing spatial processes of several types of points, J R Stat Soc B, 44, 406

10.1007/s11258-006-9133-4

10.1046/j.1461-0248.2003.00492.x

10.1006/jtbi.2000.2158

10.1086/342823

Ripley BD, 1977, Modeling spatial pattern, J R Stat Soc B, 39, 17

Seidler TG, 2007, Seed dispersal and spatial pattern in tropical trees, PLoS Biol, 4, 2132

Upton G, 1985, Spatial data analysis by example, vol 1. Point pattern and quantitative data

10.1038/nature04030

10.1002/ajp.1350210403

10.1016/j.foreco.2004.03.037

10.2307/1940675

10.1111/j.1365-2745.2006.01209.x

Yan XF, 2008, Seeding growth and survival of the endangered tree species Shorea wantianshuea after a mast‐fruiting event (in Chinese), J Plant Ecol, 32, 55

Yin SH, 1990, Study on fruiting behavior seeding establishment and population age classes of Parashorea chinensis (in Chinese with English abstract), Acta Bot Yunnan, 12, 415

10.1016/0006-3207(94)00118-A

Zhu H, 1992, Research of community ecology on Shorea chinensis forest in Xishuangbanna (in Chinese with English abstract), Acta Bot Yunnan, 14, 237

Zhu H, 2006, Forest vegetation of Xishuangbanna, south China, For Stud China, 8, 1

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Ecological Research

Tập 24 Số 5

1117-1124

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