The dynamic avifaunal assemblage of a fragmented urbanised habitat at Universiti Brunei Darussalam

Haslina Razali, Remya Kottarathu Kalarikkal, Guat Lian Ang, Ulmar Grafe
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Abstract

Urbanisation reshapes ecosystems and fundamentally influences species assemblages. Urban habitats are also highly dynamic with changes taking place on both spatial and temporal scales. The campus of Universiti Brunei Darussalam is an example of an urban habitat consisting of a mosaic of green spaces, fragments of kerangas forest, planted native and ornamental plants as well as building infrastructure, roads and pathways. The aim of this study is to provide an insight into the bird assemblages found within the university campus. Two survey periods were conducted in 2006/2007 and in 2019/2020 using the line transect method. A total of 49 bird species belonging to 23 families and 10 orders were recorded in this study. No evidence of differences in species richness was observed between the two surveys after exclusion of migrants. Insectivores were the most species-rich followed by omnivores, granivores, carnivores and frugivores. As predicted, there was a higher number of non-forest dependent bird species than forest-dependent species. Vegetation cover was lower in 2007 than in 2019, but species composition was similar between the surveys, and the co-occurrence of bird species was random. Even though the bird diversity was considered depauperated, it was comprised of a wide range of species classified as residents, migrants and waterbirds, indicating their ability to tolerate urbanisation. More studies are required to confirm that bird species are surviving and reproducing in this urban habitat.
文莱达鲁萨兰国大学破碎的城市化栖息地的鸟类动态组合
城市化重塑了生态系统,并从根本上影响了物种组合。城市生境在空间和时间尺度上也发生着高度动态的变化。文莱达鲁萨兰国大学的校园是一个城市栖息地的例子,由马赛克绿色空间、kerangas森林的碎片、种植的原生和观赏植物以及建筑基础设施、道路和小径组成。这项研究的目的是为了深入了解大学校园内发现的鸟类群落。采用样线法在2006/2007年和2019/2020年进行了两个调查期。本研究共记录鸟类49种,隶属于10目23科。排除外来物种后,两次调查未发现物种丰富度差异的证据。食虫动物种类最多,其次是杂食动物、花岗岩动物、食肉动物和果食动物。正如预测的那样,非森林依赖型鸟类的数量多于森林依赖型鸟类。2007年的植被覆盖率低于2019年,但两次调查的物种组成相似,鸟类物种的共现是随机的。尽管鸟类的多样性被认为是退化的,但它由广泛的物种组成,分为留鸟、候鸟和水鸟,这表明它们有能力忍受城市化。需要更多的研究来证实鸟类物种在这个城市栖息地存活和繁殖。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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