To properly define ecoregions, specific criteria such as geology, climate, or species composition (e.g., the presence of endemic species) must be taken into account to understand distribution patterns and resolve ecological biogeography questions. Since the studies on insects in Baja California are scarce, and no fine-scale ecoregions based on the region’s entomofauna is available, this study was designed to test whether the ecoregions based on vegetation can be used for insects, such as Calliphoridae. Nine collecting sites distributed along five ecoregions were selected, between latitudes 29.6° and 32.0°N. In each site, three baited traps were used to collect blow flies from August 2017 to June 2019 during summer, winter, and spring. A total of 30,307 individuals of blow flies distributed in six genera and 13 species were collected. The most abundant species were Cochliomyia macellaria (Fabricius), Phormia regina (Meigen), and Chrysomya rufifacies (Macquart). The composition of the Calliphoridae community was different between the localities and three general groups have been distinguished, based on the species composition similarity (ANOSIM) results: Gulf-Desert, Mountains, and Pacific-Center. The vegetation-based ecoregions only reflect the blow fly species’ distributions to a certain extent, meaning that care must be taken when undertaking ecological biogeographical studies using regionalization based on organisms other than the focal taxa because vegetation does not always reflect fauna species composition.

中文翻译：

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测试基于植被的生态区预测绿头苍蝇（双翅目：丽蝇科）物种组成的准确性


为了正确定义生态区，必须考虑地质、气候或物种组成（例如特有物种的存在）等具体标准，以了解分布模式并解决生态生物地理学问题。由于对下加利福尼亚州昆虫的研究很少，并且没有基于该地区昆虫动物群的精细生态区，因此本研究旨在测试基于植被的生态区是否可以用于昆虫，例如丽丽科昆虫。选择了分布在北纬 29.6° 至 32.0° 之间的 5 个生态区的 9 个收集点。 2017 年 8 月至 2019 年 6 月夏季、冬季和春季期间，每个地点使用了三个诱饵陷阱来收集绿头苍蝇。共采集丽蝇30307只，分布6属13种。最丰富的物种是Cochliomyia macellaria (Fabricius)、 Phormia regina (Meigen) 和Chrysomya rufifacies (Macquart)。不同地区的丽丽科群落组成不同，根据物种组成相似性 (ANOSIM) 结果，区分出三个一般类群：海湾-沙漠、山区和太平洋中心。基于植被的生态区只能在一定程度上反映丽蝇物种的分布，这意味着在使用基于焦点类群以外的生物的区划进行生态生物地理学研究时必须小心，因为植被并不总是反映动物群的物种组成。