人工陆桥岛屿系统土壤呼吸速率及其影响因子

doi:10.13287/j.1001-9332.202210.012

应用生态学报 ›› 2022, Vol. 33 ›› Issue (10): 2753-2759.doi: 10.13287/j.1001-9332.202210.012

人工陆桥岛屿系统土壤呼吸速率及其影响因子

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*

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

收稿日期:2021-12-30 修回日期:2022-07-25 出版日期:2022-10-15 发布日期:2023-04-15
通讯作者: * E-mail: fishmj@zju.edu.cn
作者简介:杨席席, 女, 1996年生, 硕士研究生。主要从事生态系统功能方面的研究。E-mail: 2865326096@qq.com
基金资助:
浙江省自然科学基金重大项目(LD19C030001)和国家重点研发计划政府间国际科技创新合作专项(2018YFE0112800)

Soil respiration rate and its influencing factors in artificial land-bridge islands system

YANG Xi-xi¹, XU Xiao-zhong², RUAN Zhen¹, GE Xiao-gai³, WANG Bin², WU Dong-hao¹, WANG Zhi-ping², YU Ming-jian^1*

¹College of Life Sciences, Zhejiang University, Hangzhou 310058, China;
²Xin'an River Ecological Development Corporation, Chun'an 311700, Zhejiang, China;
³Research Institute of Subtropical Forestry, Chinese Academy of Forestry/Qianjiangyuan Forest Ecosystem Research Station, National Forestry and Grassland Administration, Hangzhou 311400, China

Received:2021-12-30 Revised:2022-07-25 Online:2022-10-15 Published:2023-04-15

摘要/Abstract

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(3.74 μmol·m^-2·s^-1)>秋季(2.30 μmol·m^-2·s^-1)>春季(1.82 μmol·m^-2·s^-1)>冬季(1.40 μmol·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(2.37 μmol·m^-2·s^-1)显著高于大陆(2.08 μmol·m^-2·s^-1);岛屿边缘土壤呼吸速率(2.46 μmol·m^-2·s^-1)显著高于岛屿内部(2.03 μmol·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。

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

Abstract: 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 (3.74 μmol·m^-2·s^-1) > autumn (2.30 μmol·m^-2·s^-1) > spring (1.82 μmol·m^-2·s^-1) > winter (1.40 μmol·m^-2·s^-1). 2) Forest fragmentation had significant effects on soil respiration rate, with soil respiration rate of island (2.37 μmol·m^-2·s^-1) being significantly higher than that of mainland (2.08 μmol·m^-2·s^-1) and the soil respiration rate of island edge (2.46 μmol·m^-2·s^-1) being significantly higher than that of island interior (2.03 μmol·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, ammo-nium 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.

Key words: soil respiration rate, artificial land-bridge island, forest fragmentation, seasonal variation, soil physicochemical factor

杨席席, 徐小忠, 阮振, 葛晓改, 王斌, 巫东豪, 王志平, 于明坚. 人工陆桥岛屿系统土壤呼吸速率及其影响因子[J]. 应用生态学报, 2022, 33(10): 2753-2759.

YANG Xi-xi, XU Xiao-zhong, RUAN Zhen, GE Xiao-gai, WANG Bin, WU Dong-hao, WANG Zhi-ping, YU Ming-jian. Soil respiration rate and its influencing factors in artificial land-bridge islands system[J]. Chinese Journal of Applied Ecology, 2022, 33(10): 2753-2759.

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人工陆桥岛屿系统土壤呼吸速率及其影响因子

Soil respiration rate and its influencing factors in artificial land-bridge islands system

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