Breakdown of four litters of contrasting quality in a tropical Australian rainforest
Breakdown of four litters of contrasting quality in a tropical Australian rainforest
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澳大利亚热带雨林中品质对比的四窝幼崽的分解
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
R. Feuvre
中科院分区：
文献类型：
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作者：
A. Spain;R. Feuvre
(1)采用凋落袋，比较了低地热带雨林中加勒比松、白杨和白桉的凋落物与雨林混交林凋落物的凋落率。(2)枯枝落叶在夏季雨季初期暴露253天，在此期间记录的降雨量超过1660毫米。(3)凋落物破碎率的大小顺序为：白杨(混交种雨林，杉木)和加勒比松。(4)用粗网袋和细网袋剔除凋落物中的节肢动物，结果表明：雨林和白杨的混交林凋落物对节肢动物具有较强的引诱作用，而加勒比拟松材线虫对节肢动物的引诱作用较弱，不包括杉木枯枝落叶。(5)在所有凋落物中，腐解率与元素、中性洗涤纤维或酸性洗涤木质素的初始含量不是简单相关。(6)用三种常用的回归模型对数据进行了拟合，指数模型对除抗性凋落物外的所有数据均有令人满意的拟合，其中渐近模型被证明是合适的。
(1) Using litter bags, the rates of breakdown of the litter of Pinus caribaea, Araucaria cunninghamii and Eucalyptus alba were compared with that of a mixed-species rainforest litter in a lowland tropical rainforest. (2) The litter was exposed during the early part of the summer wet season and compared for 253 days; more than 1660 mm of rain was recorded during this time. (3) The rate of litter breakdown decreased in the order: E. alba > (mixed species rainforest, A. cunninghamii) > P. caribaea. (4) Excluding arthropods from the litter using coarse and fine-mesh bags showed that the mixed-species rainforest litter and that of E. alba were attractive to arthropods while that of P. caribaea was not; the litter of A. cunninghamii was excluded from this comparison. (5) In all litter, breakdown rates were not simply related to the initial contents of elements, neutral detergent fibre or acid-detergent lignin. (6) Three commonly used regression models were fitted to the data; exponential models provided satisfactory fits to the data from all except the resistant litter of P. caribaea where an asymptotic model proved appropriate.