Establishment success in a forest biodiversity and ecosystem functioning experiment in subtropical China (BEF-China)
Establishment success in a forest biodiversity and ecosystem functioning experiment in subtropical China (BEF-China)
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DOI：
10.1007/s10342-013-0696-z
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发表时间：
2013-03
影响因子：
2.8
通讯作者：
Xuefei Yang;J. Bauhus;S. Both;Teng Fang;W. Härdtle;W. Kröber;K. Ma;K. Nadrowski;Ke-quan Pei;M. Scherer‐Lorenzen;T. Scholten;G. Seidler;B. Schmid;G. Oheimb;H. Bruelheide
中科院分区：
文献类型：
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作者：
Xuefei Yang;J. Bauhus;S. Both;Teng Fang;W. Härdtle;W. Kröber;K. Ma;K. Nadrowski;Ke-quan Pei;M. Scherer‐Lorenzen;T. Scholten;G. Seidler;B. Schmid;G. Oheimb;H. Bruelheide
近年来，世界各地相继建立了研究生物多样性与生态系统功能（BEF）关系的人工林试验，但尚未涉及亚热带生物群落。在这里，我们报告了26个树种在中国亚热带的第一个这样的实验的初始生存。在中德瑞联合研究单位“BEF-China”的背景下，利用24种天然树种和两种当地商业针叶树建立了271个实验林地。根据2009年11月和2010年6月进行的生存库存，前14个月后的总体生存率为87%。广义混合效应模型表明，幼苗的存活率显着影响物种丰富度，物种的叶习性（落叶或万年青），物种的身份，种植日期和海拔高度。在第一次调查中，幼苗建立成功减少丰富度水平的增加，在第二次调查后，补种消失的趋势。虽然万年青树种的表现不如落叶树种，在第二次调查中的建立率分别为84%和93%，但它们的种植成功率超过了亚热带阔叶万年青树种的普遍预期。这些结果对我国亚热带及其他地区建立混交林保护物种多样性和改善生态系统功能具有重要意义。与传统种植园相比，混合树种种植园的额外费用也表明了将BEF实验扩大到大规模造林项目的潜力。
Experimental forest plantations to study biodiversity–ecosystem functioning (BEF) relationships have recently been established in different regions of the world, but subtropical biomes have not been covered so far. Here, we report about the initial survivorship of 26 tree species in the first such experiment in subtropical China. In the context of the joint Sino–German–Swiss Research Unit “BEF-China,” 271 experimental forest plots were established using 24 naturally occurring tree species and two native commercial conifers. Based on the survival inventories carried out in November 2009 and June 2010, the overall survival rate was 87 % after the first 14 months. Generalized mixed-effects models showed that survival rates of seedlings were significantly affected by species richness, the species’ leaf habit (deciduous or evergreen), species identity, planting date, and altitude. In the first survey, seedling establishment success decreased with increasing richness levels, a tendency that disappeared in the second survey after replanting. Though evergreen species performed less well than deciduous species with establishment rates of 84 versus 93 % in the second survey, their planting success exceeded the general expectation for subtropical broad-leaved evergreen species. These results have important implications for establishing mixed-species plantations for diversity conservation and improvement of ecosystem functioning in the Chinese subtropics and elsewhere. Additional costs associated with mixed-species plantations as compared to conventional plantations also demonstrate the potential of upscaling BEF experiments to large-scale afforestation projects.