摘要
土壤动物联结着生态系统地上与地下部分的物质循环和能量流动,对生态系统的结构、功能及过程起着重要的调控作用。地表甲虫作为典型的大型土壤动物,在食物网中占有重要的位置,因此对不同林型地表甲虫的δ^(13)C、δ^(15)N同位素特征及营养关系研究对了解森林土壤动物的食性特征进而保护森林生物多样性是十分必要的。采集了小兴安岭凉水自然保护区6种不同林型的地表甲虫共10科31种,利用稳定同位素技术测定了甲虫中的δ^(13)C、δ^(15)N含量,并分析不同林型内地表甲虫的δ^(13)C、δ^(15)N值及营养级差异。结果表明6、7月份不同林型地表甲虫的δ^(13)C、δ^(15)N值差异显著(P<0.05),其中δ^(13)C值在原始阔叶红松林和次生白桦林显著高于落叶松人工林和阔叶红松择伐林。δ^(15)N值在阔叶红松择伐林显著高于其他5种林型。不同林型地表甲虫的营养级差异显著(P<0.05),林型内各物种营养级差异不显著(P>0.05),处于2—4.5营养级之间。不同林型中6月份和7月份营养级差异较大的为红松人工林中隐翅虫科的Philonthus japonicas,相差1.28个营养级。碳氮同位素比值差异显著(P<0.05),表明甲虫食源组成复杂,碳氮比值范围跨度较大,食源多样化,摄食特化程度低。
Soil animals link the material circulation and energy flow between the above-ground and below-ground parts of the ecosystem,and play an important feedback control role for the structure,function and process of the ecosystem.As a typical large soil animal,surface beetles occupy an important position in the food web.Therefore,research on theδ^(13)C andδ^(15) N isotopic characteristics and nutritional relationships of surface beetles in different forest types is very necessary to understand the feeding characteristics of forest soil animals and protect the forest ecosystem.31 species of 10 families and 31 species of surface beetles were collected from 6 different forest types in Xiaoxing'an Mountains Liangshui Nature Reserve.The stable isotope technique was used to determine the carbon and nitrogen stable isotope content in the beetles,and theδ^(13) C,δ^(15)N isotope and nutritional level differences of the surface beetles in different forest types were analyzed.The results showed that theδ^(13) C andδ^(15) N values of surface beetles in different forest types in June and July were significantly different(P<0.05),and theδ^(13)C value in the original broad-leaved Korean pine forest and secondary birch forest was significantly higher than that of the larch plantation and the broad-leaved Korean pine selective felling forest.Theδ^(15) N value in the broad-leaved Korean pine selective felling forest was significantly higher than that of the other five forest types.The trophic levels of surface beetles in different forest types are significantly different(P<0.05),and the trophic levels of species within the forest types are not significantly different(P>0.05).It is between 2—4.5 trophic levels.Among different forest types,the difference in trophic level between June and July is Philonthus japonicas of the Paederidae in a Korean pine plantation,which has a difference of 1.28 trophic level.The carbon and nitrogen isotope ratios are significantly different(P<0.05),indicating that the beetle's food source composition is complex,the range of carbon to nitrogen ratios is large,the food source is diversified,and the degree of feeding specialization is low.
作者
刘启龙
程赛赛
陈婷
常亮
高梅香
LIU Qilong;CHENG Saisai;CHEN Ting;CHANG Liang;GAO Meixiang(College of Geographical Sciences,Harbin Normal University,Harbin 150025,China;Soil Ecology Laboratory,College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China;Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130301,China;Department of Geography and Spatial Information Techniques,Ningbo University,Ningbo 315211,China;State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products,Ningbo 315211,China)
出处
《生态学报》
CAS
CSCD
北大核心
2023年第6期2242-2252,共11页
Acta Ecologica Sinica
基金
国家自然科学基金项目(41871042)。
关键词
地表甲虫
碳氮稳定同位素
食性
营养级划分
surface beetle
stable isotope of carbon and nitrogen
feeding habits
trophic level
