Litterfall and the standing crop of litter in three tropical Australian rainforests
Litterfall and the standing crop of litter in three tropical Australian rainforests
复制标题
澳大利亚三个热带雨林中的凋落物和未立枯落叶作物
DOI：
10.2307/2259543
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发表时间：
1984
影响因子：
5.5
通讯作者：
A. Spain
中科院分区：
文献类型：
--
作者：
A. Spain
(1) 给出了澳大利亚昆士兰州东北部土壤相似但气候条件不同的三个对比雨林地点的凋落物和立枯物作物的结果。 (2) 各地点的年凋落物数量各不相同，在 3 年期间，所有地点的年凋落物数量从 728 g m-2year-' 到 1053 g m-2year-1 不等。 (3) 凋落物的季节性较强，降幅最大发生在旱季后期和雨季初期。 (4) 凋落物总量的年际变化较小，站点内的三年变化系数在 4.5% 至 10.0% 之间。 (5) 评估了14个月的叶、细木本物质和花、果实和种子的比例，并与森林的特征相关。 (6) 凋落物现存量的季节、年度和站点间变化明显。大多数中生部位的最小未收作物量约为 300 g m-2；记录的最大重量超过 1050 g m-2。 (7) 对未立枯落叶作物中叶、木材、花、果实和种子的相对比例进行了 14 个月的评估，并随季节和地点的变化而变化。 (8) 世界热带地区的凋落物总量和落叶值与地点纬度、海拔和降水量有关。
(1) Results of litterfall and the standing crop of litter are presented for three contrasting rainforest sites on similar soils but with different climatic regimes in north-eastern Queensland, Australia. (2) Annual litterfall varied between sites and ranged from 728 g m-2 year-' to 1053 g m-2 year-1 over a period of 3 years and at all sites. (3) Litterfall is strongly seasonal and the heaviest falls occurred in the latter part of the dry season and the early part of the wet season. (4) Between-year variation in total litterfall was low and 3-year coefficients of variation within sites ranged from 4.5% to 10.0%. (5) The proportions of leaf, fine woody material, and of flowers, fruits and seeds were assessed for 14 months and related to the characteristics of the forests. (6) Seasonal, annual and between-site variation in the standing crops of litter was marked. The minimum standing crop at the most mesophytic sites was approximately 300 g m-2; the maximum recorded was in excess of 1050 g m-2. (7) The relative proportions of leaf, wood, and of flowers, fruits and seeds in the standing crop of litter were assessed for 14 months and varied seasonally and between sites. (8) Total and leaf litterfall values from the world tropics are related to site latitude, altitude and precipitation.