摘要
为了揭示台风对河口沼泽土壤间隙水溶解性甲烷(CH4)、溶解性二氧化碳(CO2)和乙酸浓度等的影响,2013年7月测定了闽江河口短叶茳芏(Cyperus malaccensis)半咸水沼泽和互花米草(Spartina alterniflora)半咸水沼泽在台风"苏力"登陆前后土壤间隙水中的上述指标。结果表明,台风"苏力"显著降低了两种植物沼泽土壤间隙水中的溶解性CH4、溶解性CO2和乙酸浓度(p<0.05),同时显著增加了间隙水中SO42-浓度(p<0.01);与短叶茳芏沼泽土壤相比,互花米草沼泽土壤间隙水乙酸浓度等指标对台风的响应更为明显。两种植物沼泽土壤间隙水中乙酸浓度等指标对台风"苏力"响应的强度存在垂直剖面上的变化,短叶茳芏沼泽间隙水乙酸、硫酸根、溶解性CO2和溶解性CH4浓度在深度为10~20 cm土层中的变化最明显,而互花米草沼泽不同深度土层各指标浓度的变化对台风"苏力"响应较为复杂。
Typhoon is an important form of natural disturbance in coastal wetland ecosystem in tropical and temperate regions. To assess the impacts of typhoon on concentrations of porewater acetate, formic, sulfate,dissolved carbon dioxide and dissolved methane in coastal marshes, above indicators were measured prior to and after Typhoon Soulik in July 2013 in a Spartina alterniflora marsh and a Cyperus malaccensis marsh in the Min River estuary. Typhoon Soulik caused a distinct decrease of the concentrations of acetate, dissolved carbon dioxide and dissolved methane in porewater(p<0.05), however, increased the sulfate concentration significantly(p<0.05). Compared with the Cyperus malaccensis marsh, the effects of Typhoon Soulik on the Spartina alterniflora marsh was greater. There was obvious difference of the impact degree of Typhoon Soulik on the concentrations of acetate, sulfate, dissolved carbon dioxide and dissolved methane in porewater of soil layer of depth of 10-20 cm and other soil layers in the Cyperus malaccensis marsh, but the responses of the pore water concentrations of acetate, dissolved carbon dioxide and dissolved methane to Typhoon Soulik in different soil layers were more complex in the Spartina alterniflora marsh.
出处
《湿地科学》
CSCD
北大核心
2015年第5期622-629,共8页
Wetland Science
基金
国家自然科学基金项目(41371127)
福建师范大学校级创新团队项目(IRTL1205)
福建省基本科研专项重点项目(2014R1034-1)资助
