福建九龙江口不同林龄拉关木人工林凋落物组成及季节动态  

Composition and seasonal dynamics of litterfall in different ages of Laguncularia racemosa plantations in Jiulong River estuary,Fujian Province

作　　者：王秀丽 周亮 许诗琳[2] 吴婷婷 刘毅伟 陈浩[2] 傅蓉[2] 叶苏俊[2] 卢昌义 

机构地区：[1]厦门大学环境与生态学院,福建厦门361102 [2]厦门大学嘉庚学院河口生态安全与环境健康福建省高校重点实验室,福建漳州363105

出　　处：《应用海洋学学报》2017年第4期519-527,共9页Journal of Applied Oceanography

基　　金：国家自然科学基金资助项目(41376115);福建省中青年教师教育科研资助项目(JA15618);国家级大学生创新创业训练计划资助项目(201613469011)

摘　　要：收集福建九龙江口人工红树林拉关木(Laguncularia racemosa)中的4、6、8年生3种不同林龄植被全年的凋落物,测定其数量、组成及季节动态.结果表明,4、6、8年生拉关木林年凋落量分别为10 930.1、12 085.3、13 723.4 kg/hm2.各林龄拉关木林的凋落物组成均以落叶为主,4、6、8年生拉关木林的凋落叶量分别占年总凋落量的86.16%、77.47%、81.30%,落枝、落花、落果在年凋落物中所占的比例较小.各林龄拉关木林年凋落物量均显示出明显的季节动态,其季节变化曲线均呈双峰型,4年生和6年生的拉关木林均在5月和9月出现峰值,而8年生的拉关木林则在4月和9月出现峰值;各年龄段的拉关木林的落叶和总凋落量变化模式相同,而落枝、落花、落果的变化模式不尽相同.研究结果可为河口湿地生态系统拉关木人工林的经营管理提供参考.Litters from 3 stands of mangrove( 4-year-old,6-year-old,8-year-old Laguncularia racemosa) were collected in the area of Fugong along the tributary of Jiulong River estuary,Fujian. An analysis of the abundance,composition and seasonal dynamics of litterfall of L. racemosa showed that the annual litterfall was up to 10 930. 1,12 085. 3 and 13 723. 4 kg/hm2 in L. racemosa at the ages of 4,6 and 8 years,respectively. The leaves,being major component of the litterfall,at the ages of 4,6,8 years during the entire year,accounted for 86. 16%,77. 47% and 81. 30% of the total production,respectively. The proportions of branches,flowers and fruits of the litterfall were smaller. There was significant seasonal variation among ages,the seasonal variation of the litterfall of L. racemosa at the ages of 4,6,8 years can be defined as bimodal type. L. racemosa plantations at the ages of 4 and 6 years reached the peaks in May and September,whereas L. racemosa plantations at the ages of 8 yearsreached the peaks in April and September. The variation patterns of the leaves at different ages were the same with their own annual litterfall,but the variation patterns of branches,flowers and fruits of L. racemosa at the ages of 4,6,8 years were different. The results of the study can be taken as reference for the management of L. racemosa plantation.

关 键 词：海洋生物学 拉关木 林龄 凋落物 季节动态 

分 类 号：P735[天文地球—海洋生物学]