九龙江口秋茄红树林凋落物动态及繁殖物候特征  

The litter dynamics and reproduction phenological characteristics of Kandelia obovata mangrove community in the Jiulong River Estuary

作　　者：潘文 潘浩 林秋莲 陈鹭真 PAN Wen;PAN Hao;LIN Qiulian;CHEN Luzhen(College of the Food and Biological Engineering,Jimei University,Xiamen 361021,China;Key Laboratory of the Coastal and Wetland Ecosystems,Ministry of Education,College of the Environment & Ecology,Xiamen University,Xiamen 361102,China)

机构地区：[1]集美大学食品与生物工程学院,福建厦门361021 [2]厦门大学环境与生态学院,滨海湿地生态系统教育部重点实验室,福建厦门361102

出　　处：《厦门大学学报（自然科学版）》2021年第4期776-781,共6页Journal of Xiamen University：Natural Science

基　　金：国家自然科学基金(42076176,31770579)。

摘　　要：凋落物是红树林生态系统初级生产力的重要组成.以我国最耐寒的红树植物秋茄(Kandelia obovata)为研究对象,监测和对比九龙江口秋茄群落的凋落物动态和组分.结果表明:九龙江口秋茄群落总凋落物939.1 g/m2,主要以叶凋落物产量为主,占比54.4%;凋落高峰集中在春季,但其动态受到多种气候因子的共同影响.月均温、极端低温和极大风速是影响总凋落物产量的关键因子;极端低温对凋落物产量存在负效应,1月和12月总凋落物产量最低;夏、秋季的台风大大增加了枝凋落物产量.对比监测数据和历年数据发现:1982—2019年这38年来,秋茄繁殖体物候期延长并提前0.86 d/a.该结果为研究气候变暖、风暴潮加剧对红树林的影响提供了观测证据.The litter is an important component of the primary productivity in the mangrove ecosystem.Kandelia obovata,the most cold-resistant mangrove plants in China,was studied to monitor and compare litter dynamics and composition of the K.obovata community in the Jiulong River Estuary.The results showed that the total litter production was 939.1 g/m2,and the leaf litter was the major component of the K.obovata community(54.4%).The litter mostly peaked in spring,but its dynamics was affected by many meteorological factors.The monthly average temperature,the extremely low temperature and the maximum wind speed were the key factors affecting the total litter production.The extreme low temperature had a negative effect on the litter production,and the total litter production was the lowest in winter,e.g.in January and December.Typhoons in summer and autumn greatly increased the litter production of twigs.The comparison of the monitoring data with the historical data showed the extension of phenological period for K.obovata and starting earlier by 0.86 d/a during the 38 year period from 1982 to 2019.These results provided evidence for the effects of global warming and intensifying storm surges on mangroves.

关 键 词：红树林 秋茄 台风 花期 果期 物候 凋落物产量 

分 类 号：Q948.1[生物学—植物学]