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A stitch in time – Synergistic impacts to platypus metapopulation extinction risk
Biological Conservation ( IF 5.9 ) Pub Date : 2020-02-01 , DOI: 10.1016/j.biocon.2019.108399
Gilad Bino , Richard T. Kingsford , Brendan A. Wintle

Abstract The unique platypus is currently listed as ‘Near-Threatened’ under the IUCN Red List based on observed population declines and local extinctions, though significant uncertainty exists about its current distribution and abundance. We did the first population viability analysis across its entire range, using distribution and metapopulation data and models that integrate key threatening processes. We quantified the individual and synergistic impacts of water resource development, land clearing and invasive species on population viability of the platypus. Under current climate and threats, platypus abundance and metapopulation occupancy were predicted to respectively decline by 47%–66% and 22%–32% over 50 years. This would cause extinction of local populations across about 40% of the range. Under climate change projections (2070), increased extreme drought frequencies and duration were predicted to further expose platypuses to increased local extinctions, reducing abundance and metapopulation occupancy by 51–73% and 36–56% within 50 years respectively. Predicted estimates of key threatening processes on platypus populations strongly suggested increased risk of extinction, including listing as ‘Vulnerable’, under IUCN criterion A. This adds to the increasing evidence of decline and local extinction of platypus populations. There is an urgent need to implement national conservation efforts for this unique mammal by increasing surveys, tracking trends, mitigating threats and improving management of platypus habitat in rivers.

中文翻译:

一针一线——对鸭嘴兽种群灭绝风险的协同影响

摘要 根据观察到的种群下降和局部灭绝,这种独特的鸭嘴兽目前在 IUCN 红色名录中被列为“近危”,但其目前的分布和数量存在很大的不确定性。我们使用分布和综合种群数据以及整合了关键威胁过程的模型,对其整个范围进行了首次种群生存力分析。我们量化了水资源开发、土地清理和入侵物种对鸭嘴兽种群生存能力的个体和协同影响。在当前气候和威胁下,预计鸭嘴兽丰度和复合种群占有率将在 50 年内分别下降 47%–66% 和 22%–32%。这将导致该地区约 40% 的当地种群灭绝。根据气候变化预测(2070),预计极端干旱频率和持续时间的增加将进一步使鸭嘴兽面临更多的局部灭绝,在 50 年内分别使丰度和综合种群占有率降低 51-73% 和 36-56%。对鸭嘴兽种群关键威胁过程的预测估计强烈表明灭绝风险增加,包括根据 IUCN 标准 A 被列为“易危”。这增加了鸭嘴兽种群数量下降和局部灭绝的越来越多的证据。迫切需要通过增加调查、跟踪趋势、减轻威胁和改善河流中鸭嘴兽栖息地的管理,为这种独特的哺乳动物实施国家保护工作。在 50 年内将丰度和综合种群占有率分别降低 51-73% 和 36-56%。对鸭嘴兽种群关键威胁过程的预测估计强烈表明灭绝风险增加,包括根据 IUCN 标准 A 被列为“易危”。这增加了鸭嘴兽种群数量下降和局部灭绝的越来越多的证据。迫切需要通过增加调查、跟踪趋势、减轻威胁和改善河流中鸭嘴兽栖息地的管理,为这种独特的哺乳动物实施国家保护工作。在 50 年内将丰度和综合种群占有率分别降低 51-73% 和 36-56%。对鸭嘴兽种群关键威胁过程的预测估计强烈表明灭绝风险增加,包括根据 IUCN 标准 A 被列为“易危”。这增加了鸭嘴兽种群数量下降和局部灭绝的越来越多的证据。迫切需要通过增加调查、跟踪趋势、减轻威胁和改善河流中鸭嘴兽栖息地的管理,为这种独特的哺乳动物实施国家保护工作。这增加了鸭嘴兽种群数量下降和局部灭绝的越来越多的证据。迫切需要通过增加调查、跟踪趋势、减轻威胁和改善河流中鸭嘴兽栖息地的管理,为这种独特的哺乳动物实施国家保护工作。这增加了鸭嘴兽种群数量下降和局部灭绝的越来越多的证据。迫切需要通过增加调查、跟踪趋势、减轻威胁和改善河流中鸭嘴兽栖息地的管理,为这种独特的哺乳动物实施国家保护工作。
更新日期:2020-02-01
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