Effects of Soil Nitrogen Content on Tree Diversity in Xishuangbanna Tropical Seasonal Rain Forest

doi:10.7677/ynzwyj201514066

Abstract

Abstract:

Atmospheric nitrogen deposition and human activities may enhance the nitrogen input into ecosystems, increase content of nitrogen in soil and reduce biodiversity due to promoting the growth of dominant species and decreasing spatial heterogeneity of environment. To study the relationship between the content of nitrogen in soil and tree diversity in Xishuangbanna tropical seasonal rainforest, we randomly setted 14 plots with each of 1ha, investigated the tree species richness, total soil nitrogen (TN), biomass of the foundation species (Parashorea chinensis) and the whole trees of each plot. Our study showed increasing content of total soil nitrogen will promote growth of dominant species, decrease niches for species coexistence and reduce tree diversity due to competitive exclusion. The study indicated that reducing anthropogenic nitrogen supply to ecosystems would play a vital role for protecting tree diversity in Xishuangbanna tropical seasonal rainforest.

Key words: Total nitrogen, Tropical seasonal rain forest, Tree diversity, Biomass Xishuangbanna

CLC Number:

Q 948

SONG Cai-Yun, XU Wu-Mei, LI Qiao-Ming. Effects of Soil Nitrogen Content on Tree Diversity in Xishuangbanna Tropical Seasonal Rain Forest[J]. Plant Diversity, 2015, 37(01): 99-104.

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