Context Matters: Contrasting Ladybird Beetle Responses to Urban Environments across Two US Regions
Context Matters: Contrasting Ladybird Beetle Responses to Urban Environments across Two US Regions
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DOI：
10.3390/su10061829
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发表时间：
2018-06-01
期刊：
影响因子：
3.9
通讯作者：
Ong, Theresa Wei Ying
中科院分区：
文献类型：
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作者：
Egerer, Monika;Li, Kevin;Ong, Theresa Wei Ying
城市农业生态系统为研究城市景观中保存的生物的多样性和分布提供了机会。这些信息不仅对保护工作很重要，而且对可持续农业实践也有重要影响。相关的生物多样性可以提供授粉和虫害防治等生态系统服务，但由于生物对特定城市景观的独特环境过滤器的反应可能不同，因此比较具有不同非生物条件和城市化历史的地区是有价值的。在这项研究中，我们比较了美国加利福尼亚州和密歇根州城市花园中瓢虫的丰富度和多样性。我们询问了哪些物种是共有的，哪些物种是城市地区独有的。此外，我们询问了采样的城市花园周围的城市化程度和速度对甲虫多样性的影响。我们发现，甲虫的丰度和多样性，特别是独特物种的丰度和多样性，对城市化的反应是相反的：在加利福尼亚州，瓢虫随着城市化而增加，但在密歇根州随着城市化而减少。我们认为，在加州，花园中的水资源供应和景观的城市化历史可以解释这种不同的格局。因此，城市环境可能是生境内生物多样性的关键因素，也是城市农业生态系统中可持续农业做法的重要考虑因素。
Urban agroecosystems offer an opportunity to investigate the diversity and distribution of organisms that are conserved in city landscapes. This information is not only important for conservation efforts, but also has important implications for sustainable agricultural practices. Associated biodiversity can provide ecosystem services like pollination and pest control, but because organisms may respond differently to the unique environmental filters of specific urban landscapes, it is valuable to compare regions that have different abiotic conditions and urbanization histories. In this study, we compared the abundance and diversity of ladybird beetles within urban gardens in California and Michigan, USA. We asked what species are shared, and what species are unique to urban regions. Moreover, we asked how beetle diversity is influenced by the amount and rate of urbanization surrounding sampled urban gardens. We found that the abundance and diversity of beetles, particularly of unique species, respond in opposite directions to urbanization: ladybirds increased with urbanization in California, but decreased with urbanization in Michigan. We propose that in California water availability in gardens and the urbanization history of the landscape could explain the divergent pattern. Thus, urban context is likely a key contributor to biodiversity within habitats and an important consideration for sustainable agricultural practices in urban agroecosystems.