文献类型：期刊文献

中文题名：广州南沙湿地中人工红树林区的植物群落结构和土壤性质动态

英文题名：Dynamics of Plant Community Structures and Soil Properties in Artificial Mangrove Area of NanshaWetlands in Guangzhou

作者：李玫[1,2] 管伟[1,2] 姜仲茂[1,2] 廖宝文[1,2] 陈玉军[1,2]

第一作者：李玫

机构：[1]中国林业科学研究院热带林业研究所,广东广州510520;[2]热带林业研究国家林业和草原局重点实验室,广东广州510520

年份：2023

卷号：21

期号：5

起止页码：716-722

中文期刊名：湿地科学

外文期刊名：Wetland Science

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD2023_2024】；

基金：国家自然科学基金项目(41876094);广东省林业科技创新平台建设项目(2019KJCX021)资助。

语种：中文

中文关键词：红树林;土壤性质;无瓣海桑;木榄;南沙湿地

外文关键词：mangrove forest;soil property;Sonneratia apetala;Bruguiera gymnorrhiza;Nansha wetlands

分类号：Q948.15;S153

摘要：以2002年在广州市南沙湿地中人工营造的6种红树林群落为研究对象,分别于2005年10月、2010年8月和2016年11月,通过野外调查和采样,对6种红树群落的结构和其分布区的土壤性质动态进行研究,旨在为广东省红树林生态恢复提供借鉴。研究结果表明,2008年的低温冷害使人工营造的海桑(Sonneratia caseolaris)群落消亡,重新种植海桑后,2016年11月,海桑植株的保存率仍为0;在秋茄(Kandelia obovata)生长初期,随着树高的增高,秋茄的胸径变粗,秋茄群落的植株密度减小,在秋茄生长的中、后期,秋茄的树高几乎不再增高,其胸径继续变粗;在无瓣海桑(Sonneratia apetala)生长初期,随着树高的生长,其胸径增粗,在无瓣海桑生长的中、后期,其树高持续增高,胸径不断增粗,但是无瓣海桑群落的植株密度逐渐减小,体现了无瓣海桑林的自疏作用;无瓣海桑+红海榄(Rhizophora stylosa)群落、无瓣海桑+木榄(Bruguiera gymnorrhiza)群落和无瓣海桑+秋茄群落中植物的生长过程与无瓣海桑群落的相似,林下红海榄、木榄、秋茄的生长速度依次减小;2008年的低温冷害导致无瓣海桑+红海榄群落内的红海榄植株死亡;随着红树林恢复时间的增长,各红树群落区土壤中的黏粒和粉粒所占比例增大,表层土壤含盐量、有机质含量、速效氮含量、速效磷含量和速效钾含量有所增大,红树林的恢复有助于土壤结构和肥力的改善。
This study aims to capture the dynamics in plant communities and soil properties of artificial mangrove plantations and provide a reference for the ecological restoration of mangroves in Guangdong.The plant community structures and soil properties of 6 major artificial mangrove forests(afforested in 2002)in Nansha wetlands in Guangzhou were analyzed through field surveys and sampling in October 2005,August 2010 and November 2016,respectively.The results showed that none of the Sonneratia caseolaris community survived to November 2016,although it was reforested after the cold snap disaster in 2008.In the early stage of the Kandelia obovata community,with the increase of height,diameter at breast height increased,and stand density decreased,in the middle and late stages,the height stopped increasing,while diameter at breast height continued to increase.Regarding Sonneratia apetala forest,diameter at breast height and height increased with time,while stand density gradually decreased from the middle stage.Sonneratia apetala mixed forests had similar dynamic processes to Sonneratia apetala forest.The growth rate of Rhizophora stylosa was the largest,followed with those of Bruguiera gymnorrhiza,Kandelia obovata.No Bruguiera gymnorrhiza was preserved after the cold snap disaster in 2008.In the topsoil of each community,the proportion of clay and silt particles increased over time,especially in the Sonneratia apetala and Bruguiera gymnorrhiza mixed forests and the Sonneratia apetala and Kandelia obovata mixed communities.The contents of salt,organic matter,available nitrogen,available phosphorus and available potassium in the soils in each community area increased over time,while soil pH decreased.Mangrove restoration contributed to improved soil structure and fertility.Sonneratia apetala forest were recommended for mixed transformation due to their poor stability.Rhizophora stylosa and Sonneratia caseolaris were unsuitable for multistory forests due to their low cold tolerance.Bruguiera gymnorrhiza was an excellent species for understory regeneration due to its strong shade tolerance.