摘要
采用固定路线进行种群数量调查,并用落叶饲养,测定食性、食量,以探讨潮虫、鼠妇在广东小良人工阔叶混交林中分解落叶的作用。结果:(1)潮虫Philoscia sp.喜湿,主要分布于低湿、荫蔽处;鼠妇Armadillo sp.耐干旱,主要分布在较高爽处。(2)两种虫的种群数量高峰均在6月份。潮虫繁殖期延长到雨季之后,鼠妇则在雨季高峰前结束。(3)对未经沤化过的落叶多选食薄且质软的。鼠妇在25℃时摄食量最大,为117.1±12.4毫克/克体重·天;潮虫在20℃时食量最大,为251.2±7.3毫克/克体重·天。 通过种群年生物量变化及不同温度下的摄食量等因素来推算林中等足类的年分解落叶量:在荫蔽潮湿的林下,其分解量最大,占凋落物的自然消耗量的11.4％。
The population of two species of Isopoda was investigated by sampling method in fixed routes. The food selection and ingestion was determined by feeding them in the laboratory. The aim was to find out the role of isopoda in litter decomposition. The surveied sample plot was set up in the tropical cultiveted broad-leaf mixed forest of Xiaoliang, Guangdong.Result: 1) Philoscia sp. liked moist environment. They are distributed mainly in shady and moist forest. Armadillo sp. can resiste dry condition. They are distributed mainly in the forest with ventilation and drainage. 2) The breeding period of Armadillo sp. was shorter then that of Philoscia sp. It ended before the peak phase of rainfall dueing the rainy season, but not after. The breeding period of Philoscia sp. was lengthened from later spring to autumn. 3) Selection of food by both species was for thin and soft leaffall. 4) The maximum ingestion of Armadillo sp. was 117.1 mg/g body wt./day (25℃) and that for Philoscia sp. was 251.2 mg/g body wt./day (20℃). 5) The litter in the low-lying and moist forest land consumed by isopoda was 11.4% of natural consumption.
出处
《动物学报》
SCIE
CAS
CSCD
1992年第1期23-30,共8页
ACTA ZOOLOGICA SINICA
基金
国家自然科学基金
关键词
鼠妇
潮虫
种群
分解作用
等足目
Armadillo sp., Philoscia sp., Population, Ingestion, decomposition.
