海拔、温度和寄生蜂的压力可能会阻止两种攻击野生菜豆的墨西哥马齿苋甲虫之间的竞争

Q2 Agricultural and Biological Sciences
D. Schneider, A. Córdoba‐Aguilar
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引用次数: 1

摘要

摘要:圆叶棘豆(Acanthoscilides obtectus,Say)和圆叶棘齿(Acanthosscilides obvelatus,Bridwell)(鞘翅目:鸦胆子科)是两种寄生在豆类种子上的同域甲虫(Phaseolus vulgaris L.;Fabaceae)。利用野外采样的野生P.vulgaris豆荚以及墨西哥Altiplano海拔和温度梯度下这两个物种的种群密度、体型和寄生蜂压力数据,我们探索了这两个布鲁奇之间是否存在种间竞争。我们预计A.obtectus和A.obvelatus的种群密度、体型和寄生蜂压力彼此呈负相关。我们发现,这两个物种的种群密度在不同海拔地区有所不同,但它们的体型与预期的密度模式无关。此外,寄生蜂的出现率与A.obvelatus的丰度相关,而与A.obtectus的丰度无关。我们的数据表明,A.obtectus和A.obvelatus的生态位重叠程度仅为种间竞争似乎不太可能的程度,因为A)A.obtec图斯有替代宿主,b)P.vulgaris种子和替代豆类是研究区域中相当常见的资源。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Altitude, temperature, and parasitoid pressure may prevent competition between two Mexican bruchid beetles attacking wild Phaseolus vulgaris
ABSTRACT Acanthoscelides obtectus (Say) and Acanthoscelides obvelatus (Bridwell) (Coleoptera: Bruchidae) are two sympatric beetle species that infest bean seeds (Phaseolus vulgaris L.; Fabaceae). Using field-sampled wild P. vulgaris pods and data of population density, body size, and parasitoid pressure for both species across elevation and temperature gradients in the Mexican Altiplano, we explored whether interspecific competition occurs between the two bruchids. We expected that population density, body size, and parasitoid pressure of A. obtectus and A. obvelatus to be inversely related to one another. We found that population densities of the two species differed among the elevations, but their body sizes were independent of expected density patterns. Moreover, the parasitoid emergence rate was correlated to A. obvelatus abundance but not A. obtectus abundance. Our data suggest that niches of A. obtectus and A. obvelatus overlap only to such extent that interspecific competition seems unlikely due to a) alternative hosts are available for A. obtectus, and b) P. vulgaris seeds and alternative legumes are a fairly common resource in the studied area.
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来源期刊
The Journal of Agricultural and Urban Entomology
The Journal of Agricultural and Urban Entomology Agricultural and Biological Sciences-Insect Science
CiteScore
1.40
自引率
0.00%
发文量
2
期刊介绍: The Journal of Agricultural and Urban Entomology (JAUE) (Journal of Agricultural Entomology, Jan 1984 - Oct 1998 volumes 1-15) is published under the auspices of the South Carolina Entomological Society (SCES). The Journal publishes contributions of original research concerning insects and other arthropods of agricultural and urban importance to include those affecting humans, livestock, poultry, and wildlife. JAUE is particularly dedicated to the publication of articles and notes pertaining to applied entomology, although it will accept suitable contributions of a fundamental nature related to agricultural and urban entomology.
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