Host-specificity of folivorous insects in a moist tropical forest
Host-specificity of folivorous insects in a moist tropical forest
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DOI：
10.1046/j.1365-2656.1998.00197.x
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发表时间：
1998-05-01
影响因子：
4.8
通讯作者：
Barone, JA
中科院分区：
文献类型：
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作者：
Barone, JA
1. 为了评估巴拿马巴罗科罗拉多岛潮湿热带森林中食草动物的宿主特异性程度，我对来自10种树木的常见食草昆虫进行了一系列广泛的取食试验。
2. 向这些食草动物提供来自其已知宿主物种的同属和同科植物的叶片，以及森林中最丰富的树种的叶片。
3. 还测量了这些食草动物对其中9种树木的幼嫩展开叶片造成的损害程度。
4. 在46种食草动物（7种鞘翅目、1种直翅目、38种鳞翅目）中，26%专门以单一植物物种为食，22%仅限于以单一属为食，37%能够以单一科内的几个属为食。其余15%为杂食性动物，能够以几个不同的植物科为食。
5. 叶片受损的原因在不同树种之间差异很大。平均而言，专食性食草动物对幼叶造成58%的损害，杂食性食草动物造成8%的损害，真菌病原体造成34%的损害。对于其中4种树木，病原体是叶片受损的最重要原因。
6. 在这片森林中，大多数咀嚼式食草动物似乎食谱相当狭窄，这些专食性动物是大多数昆虫食草行为的主体。
1. To assess the degree of herbivore host-specificity in the moist tropical forest on Barro Colourado Island, Panama, I conducted an extensive series of feeding trials on the common insect herbivores from 10 tree species.2. The herbivores were offered leaves from both congeneric and confamilial plant species to their known host species, as well as leaves from the most abundant tree species in the forest.3. The amount of damage caused by these herbivores to young, expanding leaves was also measured on nine of the tree species.4. Of 46 herbivores species (seven Coleoptera, one Orthoptera, 38 Lepidoptera), 26% were specialized to a single plant species, 22% were limited to feeding on a single genus and 37% were able to feed on several genera within a single family. The remaining 15% were generalists, able to feed from several different plant families.5. The causes of leaf damage varied extensively across the tree species. On average, specialist herbivores caused 58% of the damage to young leaves, generalists herbivores 8% and fungal pathogens 34%. For four of the tree species, pathogens were the most important cause of leaf damage.6. In this forest, most chewing herbivores appear to have fairly narrow diets, and these specialists are responsible for most of the insect herbivory.