INVERTEBRATES IN CANOPY AND GROUND ORGANIC-MATTER IN A NEOTROPICAL MONTANE FOREST, COSTA-RICA
INVERTEBRATES IN CANOPY AND GROUND ORGANIC-MATTER IN A NEOTROPICAL MONTANE FOREST, COSTA-RICA
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DOI：
10.2307/2388539
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发表时间：
1990-09-01
期刊：
影响因子：
2.1
通讯作者：
LONGINO, JT
中科院分区：
文献类型：
--
作者：
NADKARNI, NM;LONGINO, JT
在新热带云雾林的哥斯达黎加，我们比较了密度和组成的大型和中型无脊椎动物的有机物中发现的树冠层内的上层土壤中发现的森林地面。我们使用了一个温克勒筛选设备提取无脊椎动物从积累的凋落物和腐殖土。冠层腐殖土和森林地面落叶层中数量上占优势的无脊椎动物类群是螨类、成虫甲虫、全变态昆虫幼虫、蚂蚁、弹尾类、端足类和等足类。这些主要类群的相对丰度是相同的冠层和森林地面上，表明冠层有机质共享一个基本相似的无脊椎动物群落与森林地面。除蚂蚁外，所有这些群体在树冠中的密度都显着较高，地面上的平均密度是树冠中的2.6倍。蚂蚁密度在两个微生境相似。
In a neotropical cloud forest of Costa Rica, we compared the density and composition of macro- and mesoinvertebrates in organic matter found within the canopy to that found in the upper soil horizons on the forest floor. We used a Winkler sifting apparatus to extract invertebrates from accumulated litter and humus. The numerically dominant invertebrate groups in both canopy humus and forest floor leaf litter were mites, adult beetles, holometabolous insect larvae, ants, collembola, amphipods, and isopods. Relative abundances of these major taxa were the same in canopy and on the forest floor, indicating that canopy organic matter shares a fundamentally similar invertebrate community with forest floor. All of these groups except ants had significantly higher densities in the canopy, with a mean density 2.6 times greater on the ground than in the canopy. Ant density was similar in both microhabitats.