文献类型：期刊文献

中文题名：人工陆桥岛屿系统土壤呼吸速率及其影响因子

英文题名：Soil respiration rate and its influencing factors in artificial land-bridge islands system.

作者：杨席席[1] 徐小忠[2] 阮振[1] 葛晓改[3] 王斌[2] 巫东豪[1] 王志平[2] 于明坚[1]

第一作者：杨席席

机构：[1]浙江大学生命科学学院,杭州310058;[2]淳安县新安江生态开发集团有限公司,浙江淳安311700;[3]中国林业科学研究院亚热带林业研究所/国家林业和草原局钱江源森林生态系统定位观测研究站,杭州311400

年份：2022

卷号：33

期号：10

起止页码：2753-2759

中文期刊名：应用生态学报

外文期刊名：Chinese Journal of Applied Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；PubMed;

基金：浙江省自然科学基金重大项目(LD19C030001);国家重点研发计划政府间国际科技创新合作专项(2018YFE0112800)资助。

语种：中文

中文关键词：土壤呼吸速率;人工陆桥岛屿;森林片段化;季节差异;土壤理化因子

外文关键词：soil respiration rate;artificial land-bridge island;forest fragmentation;seasonal variation;soil physicochemical factor

分类号：S154.1

摘要：研究片段化森林中土壤呼吸速率的格局对进一步揭示陆地生态系统碳循环具有重要意义。本研究以千岛湖人工陆桥岛屿系统不同生境(岛屿与大陆,岛屿边缘与岛屿内部)为对象,分析了土壤呼吸速率的季节动态变化规律及其与土壤理化因子的关系。结果表明:1)土壤呼吸速率在不同季节差异显著。夏季(3.74μmol·m^(-2)·s^(-1))>秋季(2.30μmol·m^(-2)·s^(-1))>春季(1.82μmol·m^(-2)·s^(-1))>冬季(1.40μmol·m^(-2)·s^(-1))。2)森林片段化对土壤呼吸速率产生显著影响,岛屿土壤呼吸速率(2.37μmol·m^(-2)·s^(-1))显著高于大陆(2.08μmol·m^(-2)·s^(-1));岛屿边缘土壤呼吸速率(2.46μmol·m^(-2)·s^(-1))显著高于岛屿内部(2.03μmol·m^(-2)·s^(-1))。3)土壤温度显著促进了土壤呼吸速率,并作为主要因子解释了56.1%的变化。4)土壤呼吸速率与土壤全碳、铵态氮含量和地表植被覆盖率呈显著正相关。土壤全碳和铵态氮含量在岛屿边缘显著高于岛屿内部。综上,森林片段化促进了土壤呼吸速率,而土壤理化因子的变化是其主要原因。
It is of great significance to understand the pattern of soil respiration rate in fragmented forests for further revealing terrestrial ecosystem carbon cycling.With different habitats(island vs.mainland,island edge vs.island interior)of the artificial land-bridge island system in Thousand Island Lake(TIL)region as the objects,we analyzed the seasonal dynamics of soil respiration rate and its relationships with soil physicochemical factors.The results showed that:1)Soil respiration rates varied significantly across different seasons,with an order of summer(3.74μmol·m^(-2)·s^(-1))>autumn(2.30μmol·m^(-2)·s^(-1))>spring(1.82μmol·m^(-2)·s^(-1))>winter(1.40μmol·m^(-2)·s^(-1)).2)Forest fragmentation had significant effects on soil respiration rate,with soil respiration rate of island(2.37μmol·m^(-2)·s^(-1))being significantly higher than that of mainland(2.08μmol·m^(-2)·s^(-1))and the soil res?piration rate of island edge(2.46μmol·m^(-2)·s^(-1))being significantly higher than that of island interior(2.03μmol·m^(-2)·s^(-1)).3)Soil temperature significantly promoted soil respiration rate,explaining 56.1%of the total variation.4)There was a significant positive correlation between soil respiration rate and soil total carbon,ammonium nitrogen content,and vegetation coverage.The soil total carbon and ammonium nitrogen content of island edge were significantly higher than those of island interior.In all,forest fragmentation promoted soil respiration rate,with soil physicochemical factors as the drivers for its variation.