Diversity of gall-inducing insects in a Mexican tropical dry forest: the importance of plant species richness, life-forms, host plant age and plant density
Diversity of gall-inducing insects in a Mexican tropical dry forest: the importance of plant species richness, life-forms, host plant age and plant density
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DOI：
10.1111/j.0022-0477.2004.00896.x
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发表时间：
2004-08-01
影响因子：
5.5
通讯作者：
Oyama, K
中科院分区：
文献类型：
--
作者：
Cuevas-Reyes, P;Quesada, M;Oyama, K
1我们检验了关于植物群落中诱瘿昆虫（GII）物种丰富度变化的四个假设。我们在墨西哥西部Chamela-Cuixmala生物圈保护区的热带干燥森林中对落叶和河岸生境进行了采样，这些生境在物候和水分供应方面有所不同。2 GII物种丰富度可能会随着宿主植物物种的丰富度和宿主植物生活型的复杂性而增加（乔木到灌木，草本和攀缘植物），与宿主年龄或宿主植物密度。3我们发现了172种植物，其中更多的是在落叶比河岸栖息地，两者同时发生34例（19.8%）。39个宿主物种中的每一个都有一个不同的GII物种。大多数GII物种瘿蚊占69.2%（Cecidomyiidae）。4我们发现，在落叶和河岸生境中，GII物种丰富度与植物物种丰富度之间存在显著的正相关关系，这表明GII物种的辐射可能与植物物种丰富度有关。与结构复杂性相一致，提供了更多的殖民地。6 GII的频率在树苗上更高，这可能有更多的未分化的分生组织对虫瘿诱导敏感。7落叶生境中虫瘿损害的频率和强度都比河岸生境大，8只有18个（46.2%）GII物种的GII频率随着宿主植物密度的增加而增加。9 GII的丰富程度取决于所有提出的因素，尽管密度往往是最不重要的。宿主丰富度和宿主年龄的影响是类似的，在许多专业食叶昆虫，虽然一个单一的昆虫与一个单一的主机的独特协会只看到GII。
1 We tested four hypotheses concerning the variation in species richness of gall-inducing insects (GII) in plant communities. We sampled deciduous and riparian habitats in a tropical dry forest at Chamela-Cuixmala Biosphere Reserve in western Mexico, that differ in phenology and moisture availability.2 GII species richness might be expected to increase with the richness of host plant species, with life-form complexity of host plants (trees to shrubs, herbs and climbers), with host age or with host plant density.3 We found 172 plant species, of which more were present in deciduous than in riparian habitats, but 34 (19.8%) occurred in both. A different GII species colonized each of 39 host species. Most GII species (69.2%) were gall midges (Cecidomyiidae).4 We found a significant positive correlation between GII species richness and plant species richness in both deciduous and riparian habitats, suggesting that radiation of GII species may be associated with plant species richness.5 Most of the GII species occurred on trees or shrubs rather than herbs or climbers, consistent with structural complexity providing more colonization sites.6 The frequency of GII was greater on saplings, which may have more undifferentiated meristems susceptible to gall induction.7 Both the frequency and intensity of damage by galls were greater in deciduous than riparian habitats, indicating a preference of GII species for plants in the more xeric habitat.8 The frequency of GII increased with host plant density in only 18 (46.2%) of GII species.9 Richness of GII depends on all proposed factors, although density is often the least important. The effects of host richness and host age are similar to those seen in many specialist folivorous insects, although the unique association of a single insect with a single host is only seen for GII.