Ecology of Root-Feeding Beetles and Their Associated Fungi on Longleaf Pine in Georgia
Ecology of Root-Feeding Beetles and Their Associated Fungi on Longleaf Pine in Georgia
复制标题
乔治亚州长叶松食根甲虫及其相关真菌的生态学
DOI：
10.1603/en09261
复制
发表时间：
2010
影响因子：
5.2
通讯作者：
L. Eckhardt
中科院分区：
文献类型：
--
作者：
James W. Zanzot;George Matusick;L. Eckhardt
摘要 食根甲虫，特别是象甲亚科 Scolytinae 和 Molytinae，已知是蛇口真菌的有效载体。这些昆虫的侵扰以及随后的蛇口真菌感染可能在加速松树衰退症状进展中发挥重要作用。为了研究长叶松林中甲虫和真菌之间的关系，在用乙醇和松节油诱饵 62 周的陷阱中收集食根的仙茅，并从其体表分离出蛇口真菌。捕获的最丰富的食根甲虫是 Hylastes tenuis、H. salebrosus、Pachyhbius picivorus、Hylobius papes 和 Dendroctonus terebrans。捕获的昆虫数量在春季和秋季达到峰值，但不同昆虫类群的峰值并不重合。最常见的真菌是 Grosmannia Huntii、Leptographium procerum、L. terebrantis 和 L. serpens。其他发现的蛇口类真菌包括蛇口菌属 (Ophiostoma spp)。和香茅属。昆虫侵扰数据表明 Hylastes spp。与 Hb 一样，共享一个生态位。苍白和P. picivorus，因为它们的真菌共生体的比例相似。与 D. terebrans 相关的真菌表明它不与其他主要媒介共享栖息地。
ABSTRACT Root-feeding beetles, particularly of the curculionid subfamilies Scolytinae and Molytinae, are known to be effective vectors of Ophiostomatoid fungi. Infestation by these insects and subsequent infection by the Ophiostomatoid fungi may play an important role in accelerating symptom progression in pine declines. To examine the relationship between beetles and fungi in longleaf pine stands, root-feeding curculionids were collected in pitfall traps baited with ethanol and turpentine for 62 wk, and Ophiostomatoid fungi were isolated from their body surfaces. The most abundant root-feeding beetles captured were Hylastes tenuis, H. salebrosus, Pachyhbius picivorus, Hylobius pales, and Dendroctonus terebrans. The number of insects captured peaked in spring and fall, although peaks for different insect taxa did not coincide. The most frequently isolated fungi were Grosmannia huntii, Leptographium procerum, L. terebrantis, and L. serpens. Other Ophiostomatoid fungi recovered included Ophiostoma spp. and Pesotum spp. Insect infestation data suggest that Hylastes spp. share an ecological niche, as do Hb. pales and P. picivorus, because the ratios of their fungal symbionts were similar. The fungi associated with D. terebrans suggest that it did not share habitat with the other principle vectors.