The coordinated impact of forest internal structural complexity and tree species diversity on forest productivity across forest biomes  

作　　者：Qin Ma Yanjun Su Tianyu Hu Lin Jiang Xiangcheng Mi Luxiang Lin Min Cao Xugao Wang Fei Lin Bojian Wang Zhenhua Sun Jin Wu Keping Ma Qinghua Guo 

机构地区：[1]State Key Laboratory of Vegetation and Environmental Change,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China [2]China National Botanical Garden,Beijing 100093,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]School of Biological Sciences,Georgia Institute of Technology,Atlanta,Georgia 30332,United States [5]National Forest Ecosystem Research Station at Xishuangbanna,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Mengla,Yunnan 666303,China [6]Southeast Asia Biodiversity Research Institute,Chinese Academy of Sciences,Mengla,Yunnan 666303,China [7]CAS Key Laboratory of Tropical Forest Ecology,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Mengla,Yunnan 666303,China [8]Key Laboratory of Forest Ecology and Management,Institute of Applied Ecology Chinese Academy of Sciences,Shenyang,Liaoning 110016,China [9]School of Biological Sciences,The University of Hong Kong,Pokfulam,Hong Kong,China [10]State Key Laboratory of Agrobiotechnology,Chinese University of Hong Kong,Hong Kong,China [11]Institute of Remote Sensing and Geographical Information Systems,School of Earth and Space Sciences,Peking University,Beijing 100871,China [12]Institute of Ecology,College of Urban and Environmental Science,Peking University,Beijing 100871,China

出　　处：《Fundamental Research》2024年第5期1185-1195,共11页自然科学基础研究（英文版）

基　　金：supported by the Frontier Science Key Programs of the Chinese Academy of Sciences(QYZDY-SSW-SMC011);the National Natural Science Foundation of China(41871332,31971575,41901358).

摘　　要：Forest structural complexity can mediate the light and water distribution within forest canopies,and has a direct impact on forest biodiversity and carbon storage capability.It is believed that increases in forest structural complexity can enhance tree species diversity and forest productivity,but inconsistent relationships among them have been reported.Here,we quantified forest structural complexity in three aspects(i.e.,horizontal,vertical,and internal structural complexity)from unmanned aerial vehicle light detection and ranging data,and investigated their correlations with tree species diversity and forest productivity by incorporating field measurements in three forest biomes with large latitude gradients in China.Our results show that internal structural complexity had a stronger correlation(correlation coefficient=0.85)with tree species richness than horizontal structural complexity(correlation coefficient=-0.16)and vertical structural complexity(correlation coefficient=0.61),and it was the only forest structural complexity attribute having significant correlations with both tree species richness and tree species evenness.A strong scale effect was observed in the correlations among forest structural complexity,tree species diversity,and forest productivity.Moreover,forest internal structural complexity had a tight positive coordinated contribution with tree species diversity to forest productivity through structure equation model analysis,while horizontal and vertical structural complexity attributes have insignificant or weaker coordinated effects than internal structural complexity,which indicated that the neglect of forest internal structural complexity might partially lead to the current inconsistent observations among forest structural complexity,tree species diversity,and forest productivity.The results of this study can provide a new angle to understand the observed inconsistent correlations among forest structural complexity,tree species diversity,and forest productivity.

关 键 词：Internal structural complexity Horizontal structural complexity Vertical structural complexity Tree species diversity Forest productivity Lidar 

分 类 号：S718.5[农业科学—林学]