摘要
利用分解网袋(孔径为1 mm)在亚布力山涧一级溪流中对水曲柳(Fraxinus mandshurica)和暴马丁香(Syringa reticulate var.mandshurica)进行了为期105 d的树叶分解研究。结果表明:水曲柳和暴马丁香树叶的分解速率分别为0.04、0.02,符合指数衰减模型,均属于快速分解组。定殖在水曲柳、暴马丁香树叶上的底栖动物种类分别为46、44种,二者均以双翅目摇蚊为主,分别占底栖动物类群数的60.9%和45.5%。从大型底栖动物摄食功能群的比例来看,定殖在水曲柳叶片上直接集食者比例最高,为52.3%;其次是撕食者(25.5%)和捕食者(19.9%);最少的为杂食者,占2.3%。而定殖在暴马丁香叶片上直接集食者为45.2%;其次为捕食者(30.9%)和撕食者(19.1%);收集者最少,占4.8%。说明夏秋两季在亚布力山涧溪流中直接集食的底栖动物丰富度与树叶分解速率有显著关系。
The experiment was conducted to study the leaves decomposition rates of Fraxinus mandshurica and Syringa reticulate with decomposition bags （diameter of 1 ram） for 105 days in the stream of Yabuli Mountain. The leaves decomposition rates of Fraxinus mandshurica and Syringa reticulate are 0.04 and 0.02, and the decomposition rate accorded with expo- nential decay model. Leaves of two species belong to the rapid decomposition groups. In the whole experiment process, the species numbers colonization benthic macroinvertebrate of the leaf Fraxinus mandshurica （46） is higher than that of Syrin- ga reticulate leaves （44） , and both belong to Diptera Chironomus, accounting for 60.9% and 45.5% of benthic animal groups. From functional feeding groups, the gatherers/collectors in Fraxinus mandshurica are dominant （52.3%）, fol- lowed by the shredders （25.5%） and the predators （ 19.9% ） , respectively. The omnivores are rare （2.3%）. There is significant relationship between the abundance of the gatherers/collectors and the leaf decomposition rate on summer and fall in the stream of Yabuli Mountain.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2013年第9期103-106,112,共5页
Journal of Northeast Forestry University
基金
黑龙江省科技攻关项目(GB09C103)
关键词
水曲柳
暴马丁香
分解速率
大型底栖动物
功能摄食群
Fraxinus mandshurica
Syringa reticulate
Decomposition rate
Benthic macroinvertebrates
Functional feeding group
