Muscoid Diptera biodiversity

当前的生物多样性危机是一种全球现象，某些地区，如北极，面临着环境快速变化的最直接风险。因此，了解过去和现在的生物多样性资源对于我们评估生物群落最近变化的程度和预测未来趋势是至关重要的。虽然昆虫在丰富度和物种丰富度方面主导着大多数陆地生态系统，但对昆虫多样性和生态的了解远远落后于植物和脊椎动物，特别是在北方栖息地。在加拿大，正如在许多其他国家一样，这种知识差距主要是由于绝大多数物种的数量在很大程度上是分类学专业知识无法匹配的，这种情况严重阻碍了我们评估环境变化对昆虫学动物入侵成分和本地成分的多样性、分布和群落组成的影响的能力。

The current biodiversity crisis is a global phenomenon, and certain regions such as the arctic are at most immediate risk from rapid environmental changes. Consequently, knowledge of past and present biodiversity resources is essential to our ability to evaluate the extent of recent changes in biological communities and forecast future trends. While insects dominate most terrestrial ecosystems in terms of abundance and species richness, knowledge of their diversity and ecology lags well behind that of plants and vertebrates, especially in northern habitats. In Canada, as in many other countries, this knowledge gap is primarily due to overwhelming species numbers largely unmatched by taxonomic expertise, a situation that seriously hampers our ability to assess the impacts of environmental changes on the diversity, distribution and community composition of both invasive and native components of our entomological fauna.