摘要
利用复合网袋法,对五角槭(Acer mono)和稠李(Prunus padus)两种树叶在帽儿山溪流中的分解速率进行了为期105 d的研究。结果表明:五角槭和稠李树叶在溪流中的分解速率常数(k)分别为0.024和0.030,符合指数衰减模型,均属于快速分解组。定殖在五角槭和稠李树叶上的大型底栖动物种类分别有30种和26种,均以蜉蝣目小蜉属(Ephemerella spp.)为优势种。两种树叶上大型底栖动物的摄食功能群的多度和生物量无显著差异,而5次采样间的差异显著。定殖在五角槭树叶上的直接集食者比例最高(45.9%),其次是捕食者(23.8%)和撕食者(22.4%),最少的为过滤收集者,仅占4.6%;定殖在稠李树叶上直接集食者的比例最高(44.6%),其次是捕食者(26.1%)和撕食者(25.4%),过滤收集者仅占1.8%。说明在帽儿山溪流中,随着溪流增大,撕食者种类减少,直接集食者类群的密度对树叶分解速率具有显著影响。
By composite mesh bag method, we studied the leaves decomposition process of Acer motto and Prunus padus for 105 days in the streams of Maoer Mountain. The leaves decomposition rates （k） ofA. mono and P. padus were 0.024 and 0,03, respectively, according with the declined exponential equation, belonging to the fast decomposition groups. The species numbers colonization benthic macro-invertebrate of the A. mono （30） leaf was higher than that of P. padus （26） leaves, both with Ephemeroptera （Ephemerella spp. ） as dominant species. There were no significant differences between two spe- cies of the feeding function group of the benthic macro-invertebrate, but the difference was significant between 5 samplings. Between the colonized macro-invertebrate functional feeding groups, the direct gatherer in A. mono was dominant （45.9%）, followed by the predator （23.8%）, the shredder （22.4%）, and the filter collector （4.6%）. The direct gatherer in P. pa- dus was dominant （ 44.6% ）, followed by the predator （ 26.1% ）, the shredder （ 25.4% ）, and the filter collector （ 1.8% ）. In the stream of Maoer Mountain, with the increase of the stream, the shredder species decreased, and the direct gatherer group density had a significant effect on the leaf decomposition rate.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2016年第1期85-89,共5页
Journal of Northeast Forestry University
基金
中央高校基本科研业务费专项资金项目(2013CAQ01)
东北林业大学大学生创新性试验计划项目(201410225168)
关键词
五角槭
稠李
分解速率
大型底栖动物
功能摄食群
Acer mono
Prunus padus
Decomposition rate
Benthic macroinvertebrates
Functional feeding groups
