古田山常绿阔叶林主要树种2002-2007年间更新动态

doi:10.3724/SP.J.1003.2011.12244

生物多样性 ›› 2011, Vol. 19 ›› Issue (2): 178-189. DOI: 10.3724/SP.J.1003.2011.12244

所属专题：中国的森林生物多样性监测

古田山常绿阔叶林主要树种2002-2007年间更新动态

汪殷华¹, 米湘成², 陈声文³, 李铭红⁴, 于明坚¹^,^*()

1 (浙江大学生命科学学院濒危动植物保护生物学教育部重点实验室, 杭州 310058)
2 (中国科学院植物研究所植被与环境变化国家重点实验室, 北京 100093)
3 (浙江古田山国家级自然保护区管理局, 浙江开化 324300
4 (浙江师范大学化学与生命科学学院, 浙江金华 321004)

收稿日期:2010-10-09 接受日期:2010-12-23 出版日期:2011-03-20 发布日期:2011-06-01
通讯作者: 于明坚
作者简介:*E-mail: fishmj202@sohu.com
基金资助:
中国科学院知识创新工程重要方向项目(KZCX2-YW-430);国家科技支撑计划项目(2008BAC39B02)

Regeneration dynamics of major tree species during 2002-2007 in a subtropical evergreen broad-leaved forest in Gutianshan National Nature Reserve in East China

Yinhua Wang¹, Xiangcheng Mi², Shengwen Chen³, Minghong Li⁴, Mingjian Yu¹^,^*()

1 Key Laboratory of Conservation Biology for Endangered Wildlife of the Ministry of Education, College of Life Sciences, Zhejiang University, Hangzhou 310058
2 State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093
3 Gutianshan National Nature Reserve Administrative Bureau, Kaihua, Zhejiang 324300
4 College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004

Received:2010-10-09 Accepted:2010-12-23 Online:2011-03-20 Published:2011-06-01
Contact: Mingjian Yu

摘要/Abstract

摘要：

种群更新是森林发育和演替过程中的重要环节。为了解古田山常绿阔叶林主要树种的更新动态, 本研究以古田山自然保护区5 ha常绿阔叶林动态样地为对象, 在对胸径(DBH)≥1 cm的木本植物个体2002年和2007年两次每木调查的基础上, 比较主要树种的补员(recruitment)和死亡状况, 分析种群大小变化趋势, 研究了群落中主要木本植物的更新特点。结果表明: (1)5年间样地内木本植物个体从13,338株增长到16,812株, 增幅达26.05%。新增4,758株胸径≥1 cm的补员个体, 同时死亡1,384株。(2)乔木、小乔木或灌木、小灌木3种生长型的补员个体数目均随径级的增大而下降, 但死亡个体却表现出不同的径级分布特点。(3)43个主要树种的平均年死亡率和年补员率分别为2.26%和5.90%。其中, 19种小乔木或灌木在径级I(1 cm≤DBH<2.5 cm)的补员率均高于死亡率, 但径级II(2.5 cm≤DBH<5 cm)、径级III(DBH≥5 cm)的补员率均和死亡率差别不大; 而24种乔木各径级死亡率和补员率的关系则相对复杂。(4)43个主要树种中有31个为增长型种群, 其余12个呈小幅度负增长。10个种群大小变化率在5%以上, 属于快速变动的种群, 其中以柳叶蜡梅(Chimonanthus salicifolius)(45.13%)和矩形叶鼠刺(Itea oblonga)(16.35%)的增幅最大, 檵木(Loropetalum chinense)(-3.10%)和短柄枹(Quercus serrata var. brevipetiolata)(-1.86%)的降幅最大。研究发现, 3种生长型中, 不同物种及其各个径级的补员率和死亡率各异, 种群更新动态也有所差别, 我们推测与密度制约和生境波动有关。

关键词: 森林动态样地, 种群更新, 死亡率, 补员率, 生长型, 径级

Abstract

To explore the regeneration dynamics of major tree species in an evergreen broad-leaved forest in Gutianshan National Nature Reserve, a 5-ha dynamic plot was established in 2002. All woody plants with DBH (diameter at breast height) ≥1 cm were tagged, mapped, measured and identified to species. Based on data from one census each in 2002 and 2007, we analyzed the characteristics of dead and recruited individuals to estimate mortality and recruitment rates, and population change for 43 tree species. The results showed the following: (1) A total of 4,758 stems were recruited and 1,384 died during the five years, and the stem increment ratio was consequently 26.05%. (2) The amounts of recruits within three growth forms (tree, subtree or shrub, and sub-shrub) all declined as DBH size class increased; a pattern different from that observed in dead individuals. (3) The average annual mortality and recruitment rate of these 43 tree species was 2.26% and 5.90%, respectively. (4) Comparing mortality and recruitment rates in each DBH class, we found that 19 subtree or shrub species consistently had higher recruitment than mortality rates in small DBH class, and almost no difference in both middle and large DBH classes. (5) 31 out of 43 species showed population growth, while 12 species’ populations declined slightly. Populations of 10 species increased or decreased at an annual rate of >5%, indicating that they were experiencing fast turnover. Among these, Chimonanthus salicifolius (45.13%) and Itea oblonga (16.35%) had the highest increment rate in population size, whereas Loropetalum chinense (-3.10%) and Quercus serrata var. brevipetiolata (-1.86%) had the highest rate of decline. In conclusion, both recruitment and mortality rates varied among species and among DBH size classes, pointing to the unique regeneration dynamics of the 43 tree species. These differences might be associated with patterns of density dependence in addition to habitat fluctuations.

Key words: forest dynamics plot, mortality rate, recruitment rate, evergreen broad-leaved forest, Gutianshan National Nature Reserve

汪殷华, 米湘成, 陈声文, 李铭红, 于明坚 (2011) 古田山常绿阔叶林主要树种2002-2007年间更新动态. 生物多样性, 19, 178-189. DOI: 10.3724/SP.J.1003.2011.12244.

Yinhua Wang, Xiangcheng Mi, Shengwen Chen, Minghong Li, Mingjian Yu (2011) Regeneration dynamics of major tree species during 2002-2007 in a subtropical evergreen broad-leaved forest in Gutianshan National Nature Reserve in East China. Biodiversity Science, 19, 178-189. DOI: 10.3724/SP.J.1003.2011.12244.

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链接本文: https://www.biodiversity-science.net/CN/10.3724/SP.J.1003.2011.12244

https://www.biodiversity-science.net/CN/Y2011/V19/I2/178

图/表 3

图1 3种生长型死亡和补员个体径级分布

Fig. 1 DBH size distribution of died and recruited individuals within three growth forms.

图2 24种乔木各径级的死亡率和补员率, 各径级中点值处作图。横轴为胸径径级(cm), 纵轴为年平均死亡率和补员率。

Fig. 2 Mortality and recruitment rates of 24 tree species in each DBH class. Points are placed above the mid-point of each DBH class.

图3 19种小乔木或灌木各径级的死亡率和补员率, 各径级中点值处作图。横轴为胸径径级(cm), 纵轴为年平均死亡率和补员率。

Fig. 3 Mortality and recruitment rate of 19 subtrees or shrubs in each DBH class. Points are placed above the mid-point of each DBH class.

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古田山常绿阔叶林主要树种2002-2007年间更新动态

Regeneration dynamics of major tree species during 2002-2007 in a subtropical evergreen broad-leaved forest in Gutianshan National Nature Reserve in East China

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