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李霁航,王邵军,王红,张哲,曹润,陈闽昆,李少辉,陈奇伯.蚂蚁筑巢对高檐蒲桃热带森林群落土壤呼吸的影响.生态学报,2018,(17).http://dx.doi.org/10.5846/stxb201710191883  
蚂蚁筑巢对高檐蒲桃热带森林群落土壤呼吸的影响
Effect of ant nesting on soil respiration in a tropical forest of Syzygium oblatum community
投稿时间:2017-10-19  修订日期:2018-04-16
DOI: 10.5846/stxb201710191883
关键词蚂蚁  西双版纳  热带森林  土壤呼吸  时间动态
Key Wordsant  Xishuangbanna  tropical forest  soil respiration  temporal dynamics
基金项目国家自然科学基金项目(41461052, 31660191);云南省教育厅项目(2017YJS089);国家林业局“948”项目(2015⁃ 4⁃ 39)
作者单位E-mail
李霁航 西南林业大学 ljhang_823@163.com 
王邵军 西南林业大学 shaojunwang2009@163.com 
王红 西南林业大学 生态与水土保持学院 dqsfwang@163.com 
张哲 西南林业大学 生态与水土保持学院 zhang27420@163.com 
曹润 西南林业大学 生态与水土保持学院 caorun0927@163.com 
陈闽昆 西南林业大学 生态与水土保持学院 minkunchen2017@163.com 
李少辉 西南林业大学 生态与水土保持学院 shaohuilizero@163.com 
陈奇伯 西南林业大学 生态与水土保持学院 chenqb05@163.com 
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摘要:
蚂蚁筑巢能够改变热带森林土壤微生物与土壤理化性质的状况,从而对土壤呼吸时间动态产生重要影响。本研究以西双版纳高檐蒲桃热带森林群落为研究对象,采用Li-6400-09便携式土壤呼吸测定仪对蚂蚁筑巢地与非筑巢地土壤呼吸进行测定。研究结果表明:(1)高檐蒲桃群落土壤呼吸呈明显的单峰型季节变化趋势,且土壤呼吸速率蚂蚁筑巢地(4.96 μmol CO2 m-2 s-1)高于非筑巢地(4.42 μmol CO2 m-2 s-1)。(2)土壤温度和土壤水分显著影响土壤呼吸的时间动态(P<0.01);蚂蚁筑巢显著改变巢内温度与水分(P<0.05),进而影响土壤呼吸动态。土壤温度对土壤呼吸动态的贡献:蚁巢(83.8%-91.8%)大于非巢地(81.2%-83.1%),但由于筑巢地土壤湿度低于非巢地,土壤水分对土壤呼吸动态的贡献率表现为蚁巢低于非筑巢地。(3)蚂蚁筑巢显著增加土壤微生物生物量(P<0.05),从而对壤呼吸速率产生极显著的影响(P<0.01)。蚂蚁筑巢引起微生物生物量碳的增加能够解释76.9%-71.1%的土壤呼吸变化。(4)蚂蚁筑巢引起土壤理化性质变化对土壤呼吸产生一定的影响。土壤容重与土壤呼吸速率呈显著负相关;土壤呼吸速率与土壤微生物量碳、有机质、易氧化有机碳、全氮、硝氮和铵氮显著正相关(P<0.05或 P<0.01)。因此,蚂蚁筑巢显著改变土壤微生物(如微生物生物量碳)、土壤物理性质(如土壤温度与水分)、土壤化学性质(如碳和氮养分),进而对热带森林土壤呼吸产生重要影响。
Abstract:
Ant nesting induces a significant change of soil microbial and physicochemical properties, which can exert a significant effect on the temporal dynamics of soil respiration in tropical forests. The Li-6400-09 portable soil respiration chamber was used to measure respiration from ant nests and the reference soils in a Syzygium oblatum community of tropical Xishuangbanna, Yunnan. The results were as following: (1) Soil respiration rates had obvious temporal variation, showing a single peak curve trend. They were higher in ant nests (4.96 μmol CO2 m-2 s-1) than in reference soils (4.42 μmol CO2 m-2 s-1). (2) The temporal variation of soil respiration was affected by soil temperature and soil water (P<0.01). Ant nesting significantly changed soil temperature and water in ant nests (P<0.05), which affected soil respiration. The contribution of soil temperature to soil respiration was higher in ant nests (83.8%-91.8%) than in reference soils (81.2%—83.1%). However, the contribution of soil water to soil respiration was lower in ant nests than in reference soil, which may owe to the lower soil moisture in ant nests. (3) Ant nesting significantly increased soil microbial biomass carbon (P<0.05), which had a significant effect on soil respiration rate (P<0.01). The increase in the soil microbial biomass carbon due to ant nesting can explain 76.9%—71.1% of soil respiration. (4) The change of soil physicochemical properties under the effect of ant nesting had a significant effect on soil respiration. Soil bulk density was negatively correlated with soil respiration, while soil respiration was positively related with soil microbial biomass carbon, soil organic matter, soil easily oxidized organic carbon, total nitrogen, nitrate nitrogen, and ammonium nitrogen (P<0.05 or P<0.01). Therefore, ant nesting changes soil microbial (i.e., soil microbial biomass carbon), soil physical properties (i.e., soil temperature and soil water), and soil chemical properties (i.e., soil carbon and nitrogen concentrations), which can have a significant effect on soil respiration dynamics in the tropical forest.
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