Temporal and Spatial Patterns of Aboveground Biomass and Its Driving Forces in a Subtropical Forest: A Case Study

IF 0.4 4区环境科学与生态学 Q4 ECOLOGY

Polish Journal of Ecology Pub Date : 2019-09-05 DOI:10.3161/15052249PJE2019.67.2.001

Lei Ma, Wen Li, Nan-Nan Shi, S. Fu, Juyu Lian, W. Ye

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引用次数: 3

Abstract

ABSTRACT The accurate characterization of aboveground biomass (AGB) dynamics and their driving forces in sub-tropical forests is important to evaluate AGB's contribution to global carbon stocks. In order to estimate the effects of local variables on temporal and spatial patterns of AGB we investigated the variation of AGB in a 20-ha sub-tropical permanent plot. We found that the AGB was 153.7 Mg ha-1 in 2005, and 149.3 Mg ha-1 in 2010. During the five-year period, AGB changed due to tree mortality, growth (diameter at breast height, DBH) and recruitment. Medium-sized trees (DBH: 30–50 cm) were the largest contributor to total AGB. Both the tree species diversity index and the number of individuals within medium (DBH: 30–50 cm) and large (DBH: >50 cm) DBH ranges had significant positive effects on AGB. In addition, the abiotic factors such as elevation, slope, and convexity had negative significant relationships with AGB. The results indicate the importance of including forest community characteristics and environmental variables in forest carbon studies. This study also provides important data that can be used to develop and validate carbon cycling models for old-growth sub-tropical forests.

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亚热带森林地上生物量时空格局及其驱动力研究

摘要准确描述亚热带森林地上生物量（AGB）动态及其驱动力，对于评估AGB对全球碳储量的贡献至关重要。为了估计局部变量对AGB时间和空间模式的影响，我们研究了20公顷亚热带永久地块中AGB的变化。我们发现2005年AGB为153.7 Mg ha-1，2010年为149.3 Mg ha-。在五年期间，AGB因树木死亡率、生长（乳高直径、DBH）和招聘而发生变化。中型树木（DBH:30-50厘米）是AGB总量的最大贡献者。树种多样性指数和中等（DBH:30–50 cm）和较大（DBH>50 cm）DBH范围内的个体数量对AGB都有显著的正向影响。此外，海拔、坡度和凸度等非生物因素与AGB呈负相关。结果表明，在森林碳研究中纳入森林群落特征和环境变量的重要性。这项研究还提供了重要数据，可用于开发和验证古老亚热带森林的碳循环模型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polish Journal of Ecology 环境科学-生态学

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

18-36 weeks

期刊介绍： POLISH JOURNAL OF ECOLOGY (formerly Ekologia polska) publishes original scientific research papers dealing with all aspects of ecology: both fundamental and applied, physiological ecology, evolutionary ecology, ecology of population, community, ecosystem, landscape as well as global ecology. There is no bias regarding taxons, ecosystems or geographical regions.