Department of Genetics, University of the Free State, Bloemfontein, 9300, South Africa.
Mol Biol Rep. 2021 Dec;48(12):8211-8220. doi: 10.1007/s11033-021-06822-y. Epub 2021 Oct 15.
South Africa is the third most biodiverse country in the world and insects represent a large part of its faunal diversity, as is seen globally. With more than 65,000 described animal species in South Africa, insects represent 44,088 species. While there are still a lot of species yet to be identified, progress may be hindered by the few insect taxonomists available in South Africa and subsequently, the time-consuming nature and costs of the methods used during species identification. DNA barcoding, on the other hand, has become a valuable tool for documenting biodiversity with the use of a small DNA fragment such as cytochrome oxidase subunit 1 (COI). This paper aims to assess South Africa's contribution to the Barcode of Life Database (BOLD) as well as highlight the regions that are under-represented on BOLD. From the 4,984,215 Insecta records on BOLD, South Africa contributed 56,392 insect records, with only 16.85% of that total identified to species level. The Gauteng Province had the most represented insect samples submitted to BOLD with 63.57% followed by Kwazulu-Natal (15.74%), and Mpumalanga (5.73%). However, the Free State, Limpopo, and the Northern Cape provinces are all under-represented on BOLD. This is evident as both the Northern Cape and Limpopo provinces contain one or more biodiversity hotspots which in turn displays the high levels of biodiversity that could still be recorded on BOLD. Improving our understanding with regards to DNA barcoding data linked to geographical regions, as well as specific insect groups, can highlight the areas in need of more research.
南非是世界上生物多样性排名第三的国家,其动物多样性很大一部分由昆虫组成,这在全球范围内都可见一斑。南非拥有超过 65,000 种已描述的动物物种,其中昆虫占 44,088 种。虽然还有很多物种有待鉴定,但南非可用的昆虫分类学家数量较少,这可能会阻碍鉴定物种的进展,而且这些方法耗时且费用高昂。另一方面,DNA 条形码技术已成为记录生物多样性的宝贵工具,它使用一小段 DNA 片段(如细胞色素氧化酶亚基 1(COI))。本文旨在评估南非对生命条形码数据库(BOLD)的贡献,以及突出 BOLD 中代表性不足的地区。在 BOLD 上的 4,984,215 条昆虫记录中,南非贡献了 56,392 条昆虫记录,其中只有 16.85%的记录被鉴定到物种水平。在向 BOLD 提交昆虫样本最多的省份中,豪登省排名第一,占比 63.57%,其次是夸祖鲁-纳塔尔省(15.74%)和姆普马兰加省(5.73%)。然而,自由州、林波波省和北开普省在 BOLD 上的代表性不足。这一点显而易见,因为北开普省和林波波省都包含一个或多个生物多样性热点地区,这反过来又显示了 BOLD 上可能仍有大量生物多样性有待记录。通过了解与地理区域以及特定昆虫群相关的 DNA 条形码数据,可以突出需要更多研究的领域。