文献类型：期刊文献

英文题名：Factors influencing mangrove forest recruitment in rehabilitated aquaculture ponds

作者：Xiong, Yanmei[1] Jiang, Zhongmao[1] Xin, Kun[1] Liao, Baowen[1] Chen, Yujun[1] Li, Mei[1] Guo, Hao[1] Xu, Yanzhe[1] Zhai, Xin[2] Zhang, Chunlan[2]

第一作者：熊燕梅

通信作者：Zhai, X[1];Zhang, CL[1]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Peoples R China;[2]Guangdong Acad Sci, Inst Zool, Guangdong Publ Lab Wild Anim Conservat & Utilizat, Guangdong Key Lab Anim Conservat & Resource Utili, Guangzhou 510260, Peoples R China

年份：2021

卷号：168

外文期刊名：ECOLOGICAL ENGINEERING

收录：;EI(收录号：20212110405213);Scopus(收录号：2-s2.0-85106341030);WOS:【SCI-EXPANDED(收录号:WOS:000659060600003)】；

基金：We thank Dr. Christian J. Sanders for constructive comments and editing on the manuscript. Our thanks are extended to Dr. Catherine E. Lovelock and Mr. Cairong Zhong for their helpful insights. This study was funded by the Key-Area Research and Development Program of Guangdong Province (2020B020214001), National Natural Science Foundation of China (41776103 and 41876094) and GDAS Special Project of Science and Technology Development (2018GDASCX-0107).

语种：英文

外文关键词：Coastal wetland; Pond rehabilitation; Ecological restoration; Wetland restoration; Colonization; Natural regeneration; Species invasion

摘要：Aquaculture development was the major reason for mangrove loss in many Asian countries during the previous century. With increasing recognition of the importance of mangroves, rehabilitating aquaculture ponds back to mangrove forests has become a popular initiative. However, factors influencing mangrove recruitment, in particular natural recruitment in pond rehabilitation remain unclear. Here we surveyed the vegetation, elevation thresholds of mangroves, soil properties and the distance to open water in 17 rehabilitated ponds across different geomorphologic settings in Dongzhai Harbor, Hainan, China five years after the rehabilitation project was initiated. We found that mangroves colonized within an elevation range from 10 cm to 161 cm above mean sea level. The lower and higher elevation thresholds for mangrove recruitment varied greatly across ponds and were positively correlated. The thresholds were not related to the distance to open water, salinity or soil properties. Natural mangrove recruitment occurred in all ponds and non-planted species dominated in 14 ponds, among which non-planted exotic Sonneratia apetala dominated or co-dominated with other species in ten ponds. Total ground trunk area of mangroves and the relative dominance of non-planted mangroves were negatively related to soil salinity and positively related to soil nitrogen and the fraction of soil clay+silt (particles < 0.02 mm). These results suggest that elevation may not be a good proxy for hydrological conditions at restored sites and there are no unique elevation thresholds for mangrove recruitment within the same area due to the spatial heterogeneity of hydrodynamics or the varying inundation tolerance of mangroves along environmental gradients. Natural recruitment is a cost-effective way of mangrove rehabilitation at fluvial sites with more favorable soil properties, but planting is helpful to speed up mangrove rehabilitation and increase species diversity at oceanic sites with less favorable conditions. However, invasion of exotic species should be taken into consideration during pond rehabilitation.