植物生态学报 ›› 2016, Vol. 40 ›› Issue (11): 1154-1163.DOI: 10.17521/cjpe.2016.0157

• 研究论文 • 上一篇    下一篇

浙江普陀山岛森林凋落物动态与微气候的关联性

宋彦君1,2,3, 田文斌4, 刘翔宇1,2,3, 尹芳1,2,3, 程浚洋1,2,3, 朱丹妮1,2,3, AliARSHAD1,2,3, 阎恩荣1,2,3,*()   

  1. 1华东师范大学生态与环境科学学院, 上海 200241
    2浙江普陀山森林生态系统定位观测研究站, 浙江舟山 316100
    3浙江天童森林生态系统国家野外科学观测研究站, 浙江宁波 315114
    4普陀山园林管理中心, 浙江舟山 316100
  • 收稿日期:2016-05-05 接受日期:2016-09-21 出版日期:2016-11-10 发布日期:2016-11-25
  • 通讯作者: 阎恩荣
  • 基金资助:
    国家自然科学基金(31270475和31070383)

Associations between litterfall dynamics and micro-climate in forests of Putuoshan Island, Zhejiang, China

Yan-Jun SONG1,2,3, Wen-Bin TIAN4, Xiang-Yu LIU1,2,3, Fang YIN1,2,3, Jun-Yang CHENG1,2,3, Dan-Ni ZHU1,2,3, ARSHAD Ali1,2,3, En-Rong YAN1,2,3,*()   

  1. 1School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China

    2Putuo Forest Ecosystem Research and Observation Station, Zhoushan, Zhejiang 316100, China

    3Tiantong National Forest Ecosystem Observation and Research Station, Ningbo, Zhejiang 315114, China
    and
    4Center of Garden Management in Putuoshan, Zhoushan, Zhejiang 316100, China
  • Received:2016-05-05 Accepted:2016-09-21 Online:2016-11-10 Published:2016-11-25
  • Contact: En-Rong YAN

摘要:

森林凋落物动态是森林生态系统过程中的重要组成部分, 探索森林凋落物动态特征与微气候间的关系, 对深入了解生态系统变化过程运行机理具有重要意义。该研究以浙江普陀山岛典型森林类型枫香(Liquidambar formosana)林、天竺桂(Cinnamomum japonicum)+红楠(Machilus thunbergii)林、马尾松(Pinus massoniana)林、青冈(Cyclobalanopsis glauca)林、台湾蚊母树(Distylium gracile)林为研究对象, 探究森林凋落量与微气候的关系。结果表明: 1)森林年凋落量介于3.45-5.36 t·hm-2·a-1, 年凋落量各组分比例表现出不同的组成特征, 森林类型与森林月凋落量无关。2)森林月凋落量动态模式主要呈双峰型和三峰型, 凋落峰值和风速峰值趋势相一致, 主要集中在台风干扰较大的4、7、12月份。3)冗余分析结果表明, 影响不同组分月凋落量的微气候因子不同: 月总凋落量、叶凋落量、果凋落量和碎屑凋落量的主要控制因素均为空气温度, 随空气温度的升高而增大; 枝凋落量的主要影响因素是森林上层风速, 同样起着显著的正向作用; 花凋落量与空气湿度之间呈负相关关系。森林年凋落量各组分所占比例存在差异, 森林月凋落量和森林类型无关, 主要与空气温度、空气湿度、森林上层风速等微气候因子有关。

关键词: 普陀山岛, 凋落量, 凋落物动态, 冗余分析, 微气候

Abstract:

Aims Seasonal litterfall production plays an important role in the carbon and nutrient cycling in forest ecosystems. This study examines the effects of micro-environmental factors on seasonal litterfall dynamics in the forests of Putuoshan Island, Zhejiang Province of eastern China.
Methods The study covers five forest types, including Liquidambar formosana forest, Cinnamomum japonicum and Machilus thunbergii forest, Pinus massoniana forest, Cyclobalanopsis glauca forest, and Distylium gracile forest, in Putuoshan Island. We collected micro-meteorological data, and measured monthly litterfall in stands of the five forest types over one year. Redundancy analysis (RDA) was performed to determine the effects of micro-climatic factors on litterfall production.
Important findings The average annual litterfall production ranged from 3.45 to 5.36 t·hm-2·a-1 across five types of forests, albeit no effect of forest types on the litterfall production. The partitioning of litterfall components differed among the five forest types. The seasonal litterfall production exhibited two contrasting patterns, i.e. double climax curve and triple peaks, and varied significantly among the five forest types. Moreover, the peak in the litterfall production mostly occurred in the windy months of the year, such as in April, July and December, which was consistent with the dynamics of wind speed. RDA results showed that components of litterfall production in different months were controlled by different micro-climatic factors. The total, leaves, fruits, and miscellaneous litterfall productions were directly and positively affected by air temperature. Twig litterfall production was positively affected by the overstory wind velocity. Flower litterfall production was negatively affected by air humidity. In summary, forest types had no effects on litterfall production. However, variations in litterfall productions were explained by air temperature, air humidity, and overstory wind velocity in the forests studied.

Key words: Putuoshan Island, litterfall production, litterfall dynamics, redundancy analysis, micro-climate