文献类型：期刊文献

中文题名：海南东寨港红树林退化原因初探

英文题名：A primary analysis on mangroves degradation in Dongzhaigang of Hainan Island

作者：徐蒂[1,2] 廖宝文[2] 朱宁华[1] 管伟[2] 李诗川[3] 钟才荣[3]

第一作者：徐蒂

机构：[1]中南林业科技大学;[2]中国林业科学研究院热带林业研究所;[3]海南东寨港国家级自然保护区管理局

年份：2014

期号：2

起止页码：294-300

中文期刊名：生态科学

外文期刊名：Ecological Science

收录：北大核心:【北大核心2011】；CSCD:【CSCD_E2013_2014】；

基金：国家自然科学基金项目(No.41176084);国家林业局海南东寨港红树林湿地生态站项目

语种：中文

中文关键词：红树林退化;团水虱;微地形变化;积水时间

外文关键词：mangrove degradation; Sphaeroma; micro topography; ponding time

分类号：S728;Q14

摘要：针对海南东寨港国家级自然保护区内成片红树林严重退化现象,对退化红树林开展群落特征调查及其相关环境因子的观测研究,以揭示其退化机制。研究结果表明:(1)红树林退化与林木高度和胸径无显著相关,但随退化程度加深,林分密度、林分郁闭度和单位面积呼吸根数量均呈下降趋势,并达到极显著相关;(2)团水虱主要分布在离地面高度0—30 cm的树干根茎处,尤其在10—20 cm处分布最多,其密度达2.94个·cm-2,钻孔面积所占面积达23.93%,并且与每株红树退化程度达到极显著相关;(3)红树林群落微地形变化导致了淹水深度和淹水时间的变化,其中淹水深度变化与红树林退化无显著相关,但淹水时间变化(表现在形成积水)则与其退化呈显著正相关,较长的淹水(积水)时间加剧了红树林退化,退化特征值(%)与积水时间(min)之间的函数关系为Y死亡率=0.4138x+42.66(R=0.817,p<0.01),Y退化率=0.5195x+13.943(R=0.639,p<0.05)。
According to the serious degradation phenomenon of mangroves and in order to reveal the degradation mechanism in Hainan Dongzhaigang National Nature Reserve, we investigated the community characteristics and the related environmental factors of the degradation of mangroves. The results showed that： 1） There were no significant correlation between the tree height, DBH and the degradation mangrove. But as the degree of degradation, the stand density, the forest canopy density and the breathing root number per unit area had all showed a decline trend, and achieved significant correlation; 2） Sphaeromas were mainly distributed in the height from 0 to 30 cm of the mangrove roots, especially in 10 to 20 cm. The population density of Sphaeromas was 2.94 per square centimeter, and the drilling area accounted for 23.93% of total area. There was a significant correlation between the population density, drilling area and mangrove degradation degree; 3） The micro-topography changes of mangrove community led to the changes of water depth and the flooding time. And there was no significant correlation between water depth and mangrove degradation degree, but the flooding time change （in the form of ponding water） was positively related with its degradation. Longer flooding （ponding water） time exacerbated the mangroves degradation. The function relationship between degradation characteristic value （%） and ponding water （min） is Y（mortality）=0.4138X＋42.66 （R=0.817,p〈0.01）, Y（degradation rate） =0.5195x＋13.943 （R=0.639,p〈0.05）.