ABSTRACT Half of Fiji’s 66 land bird species are endemic and 15 species are threatened with extinction following ~70% deforestation. Under conditions of large-scale habitat loss, secondary vegetation can be important for woodland biodiversity conservation. This study compares avian abundance and diversity in secondary vegetation on Viti Levu, Fiji. We use avian point surveys at replicate sites in regenerating mahogany plantation (Colo-i-Suva; eastern lowlands), regenerating native forest (Koroyanitu National Heritage Park; western highlands) and grassland (Koroyanitu National Heritage Park). We ask if there are differences in avian abundance and species richness across habitat types. In total, we recorded 1063 birds from 33 bird species. Regenerating forest sites had the greatest species richness with mostly endemic and native woodland bird species and few introduced species. Regenerating plantation sites harboured a comparable number of endemic species and threatened species as regenerating forest sites but had significantly fewer native species and no introduced species. We recorded the most birds at grassland sites as well as the most introduced species. The findings of this study underscore the importance of regenerating native forest and regenerating plantation as habitats for Fiji’s endemic woodland birds. Increasing the expanse of regenerating forest sites should be considered for conservation planning to sustain Fiji’s extant birds.

中文翻译：

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斐济林地鸟类次生植被保护价值

摘要 斐济 66 种陆地鸟类中有一半是地方性鸟类，15 种鸟类在约 70% 的森林砍伐后面临灭绝威胁。在栖息地大规模丧失的情况下，次生植被对于林地生物多样性保护非常重要。本研究比较了斐济维提岛次生植被的鸟类丰度和多样性。我们在再生桃花心木种植园（Colo-i-Suva；东部低地）、再生原始森林（Koroyanitu 国家遗产公园；西部高地）和草原（Koroyanitu 国家遗产公园）的复制地点使用鸟类点调查。我们询问不同栖息地类型的鸟类丰度和物种丰富度是否存在差异。我们总共记录了来自 33 种鸟类的 1063 只鸟。再生林地具有最大的物种丰富度，主要是地方性和本地林地鸟类，很少引入物种。再生人工林地拥有与再生林地相当数量的地方物种和受威胁物种，但本地物种和引进物种明显减少。我们在草原地区记录了最多的鸟类以及引入最多的物种。这项研究的结果强调了再生原生森林和再生种植园作为斐济特有林地鸟类栖息地的重要性。保护规划应考虑扩大再生林地的面积，以维持斐济现存的鸟类。再生人工林地拥有与再生林地相当数量的地方物种和受威胁物种，但本地物种和引进物种明显减少。我们在草原地区记录了最多的鸟类以及引入最多的物种。这项研究的结果强调了再生原生森林和再生种植园作为斐济特有林地鸟类栖息地的重要性。保护规划应考虑扩大再生林地的面积，以维持斐济现存的鸟类。再生人工林地拥有与再生林地相当数量的地方物种和受威胁物种，但本地物种和引进物种明显减少。我们在草原地区记录了最多的鸟类以及引入最多的物种。这项研究的结果强调了再生原生森林和再生种植园作为斐济特有林地鸟类栖息地的重要性。保护规划应考虑扩大再生林地的面积，以维持斐济现存的鸟类。这项研究的结果强调了再生原生森林和再生种植园作为斐济特有林地鸟类栖息地的重要性。保护规划应考虑扩大再生林地面积，以维持斐济现存的鸟类。这项研究的结果强调了再生原生森林和再生种植园作为斐济特有林地鸟类栖息地的重要性。保护规划应考虑扩大再生林地的面积，以维持斐济现存的鸟类。