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Spatially and temporally targeted suppression of despotic noisy miners has conservation benefits for highly mobile and threatened woodland birds
Biological Conservation ( IF 4.9 ) Pub Date : 2018-11-01 , DOI: 10.1016/j.biocon.2018.10.006
Ross Crates , Aleks Terauds , Laura Rayner , Dejan Stojanovic , Robert Heinsohn , Colin Wilkie , Matthew Webb

Abstract Interactive effects of habitat loss and interspecific competition are major threats to global biodiversity. Managing despotic competitors in modified landscapes is a conservation priority, but implementing actions to benefit rare and highly mobile species is challenging. In Australia, overabundance of hyperaggressive noisy miners following woodland fragmentation and degradation is a key threatening process given their impact on songbirds including the nomadic, critically endangered regent honeyeater. Recent studies have found rapid noisy miner recolonization following their experimental removal, questioning the efficacy of miner removal as a conservation measure. We estimated the relative habitat saturation of noisy miners at a hotspot of threatened bird diversity. We then experimentally removed 350 noisy miners and assessed the effect of this removal on subsequent noisy miner abundance, relative to a control area. We monitored the occurrence of noisy miners near regent honeyeater nests and modelled the effect of noisy miner removal on songbird populations. Noisy miner removal significantly decreased noisy miner abundance throughout the breeding season, when 15–18 regent honeyeaters nested in the miner removal area. Songbird abundance and species richness increased significantly in the miner removal area, relative to the control area. We provide a rare example of how spatially and temporally targeted preventative action can reduce threats for nomadic and highly threatened species during breeding and prevent ongoing avian diversity loss more broadly.

中文翻译:

对专制嘈杂矿工的空间和时间有针对性的抑制对高度移动和受威胁的林地鸟类具有保护作用

摘要 栖息地丧失和种间竞争的相互作用是全球生物多样性的主要威胁。管理改造景观中的专制竞争者是保护的优先事项,但采取行动使稀有和高度流动的物种受益具有挑战性。在澳大利亚,在林地破碎和退化之后,过度活跃的嘈杂矿工过多是一个关键的威胁过程,因为它们对鸣禽包括游牧的、极度濒危的摄政蜂鸟产生影响。最近的研究发现,在实验移除矿工后,嘈杂的矿工迅速重新定植,质疑移除矿工作为保护措施的有效性。我们估计了在鸟类多样性受到威胁的热点地区嘈杂矿工的相对栖息地饱和度。然后,我们实验性地移除了 350 名嘈杂的矿工,并评估了这种移除对后续嘈杂矿工丰度的影响,相对于控制区域。我们监测了摄政蜂巢附近嘈杂的矿工的出现,并模拟了嘈杂的矿工移除对鸣禽种群的影响。在整个繁殖季节,当 15 到 18 只摄政食蜜鸟嵌套在矿工移除区域时,嘈杂的矿工移除显着降低了嘈杂矿工的数量。相对于控制区,矿工清除区的鸣禽丰度和物种丰富度显着增加。我们提供了一个罕见的例子,说明在空间和时间上有针对性的预防行动如何在繁殖过程中减少对游牧和高度受威胁物种的威胁,并更广泛地防止持续的鸟类多样性丧失。相对于控制区域。我们监测了摄政蜂巢附近嘈杂的矿工的出现,并模拟了嘈杂的矿工移除对鸣禽种群的影响。在整个繁殖季节,当 15 到 18 只摄政食蜜鸟嵌套在矿工移除区域时,嘈杂的矿工移除显着降低了嘈杂矿工的数量。相对于控制区,矿工清除区的鸣禽丰度和物种丰富度显着增加。我们提供了一个罕见的例子,说明在空间和时间上有针对性的预防行动如何在繁殖过程中减少对游牧和高度受威胁物种的威胁,并更广泛地防止持续的鸟类多样性丧失。相对于控制区域。我们监测了摄政蜂巢附近嘈杂的矿工的出现,并模拟了嘈杂的矿工移除对鸣禽种群的影响。在整个繁殖季节,当 15 到 18 只摄政食蜜鸟嵌套在矿工移除区域时,嘈杂的矿工移除显着降低了嘈杂矿工的数量。相对于控制区,矿工清除区的鸣禽丰度和物种丰富度显着增加。我们提供了一个罕见的例子,说明在空间和时间上有针对性的预防行动如何在繁殖过程中减少对游牧和高度受威胁物种的威胁,并更广泛地防止持续的鸟类多样性丧失。在整个繁殖季节,当 15 到 18 只摄政食蜜鸟嵌套在矿工移除区域时,嘈杂的矿工移除显着降低了嘈杂矿工的数量。相对于控制区,矿工清除区的鸣禽丰度和物种丰富度显着增加。我们提供了一个罕见的例子,说明在空间和时间上有针对性的预防行动如何在繁殖过程中减少对游牧和高度受威胁物种的威胁,并更广泛地防止持续的鸟类多样性丧失。在整个繁殖季节,当 15 到 18 只摄政食蜜鸟嵌套在矿工移除区域时,嘈杂的矿工移除显着降低了嘈杂矿工的数量。与对照区相比,矿工清除区的鸣禽丰度和物种丰富度显着增加。我们提供了一个罕见的例子,说明在空间和时间上有针对性的预防行动如何在繁殖过程中减少对游牧和高度受威胁物种的威胁,并更广泛地防止持续的鸟类多样性丧失。
更新日期:2018-11-01
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