Overconfidence undermines global wildlife abundance trends

Overconfidence undermines global wildlife abundance trends
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过度自信破坏了全球野生动物丰富度趋势

DOI:
10.1101/2022.11.02.514877
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发表时间:
2022
期刊:
--
影响因子:
--
通讯作者:
Johnson T
Johnson T
中科院分区:
--
文献类型:
--
作者:
Johnson T

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面对快速的全球变化和生物多样性的不确定命运,量化野生种群的趋势至关重要。这些趋势通常是从大的地理和时间尺度上的物种套件的丰度时间序列估计的。这些数据隐含着系统发育、空间和时间结构,如果不加以适当解释,可能会掩盖生物多样性变化的真实程度和方向。在这里,使用一种新的统计框架来同时解释所有这三种结构,我们表明,代表数百万丰度观测的10个高知名度数据集中的大多数当前丰度趋势估计可能是不可靠或不正确的。我们的新方法表明,以前的模型过于简单化,错误地估计了全球丰度趋势,往往大大低估了不确定性,这是将全球评估转化为政策结果的关键方面。此外,我们的方法还导致丰度预测精度的大幅提高。虽然我们的研究结果并没有改善生物多样性的前景,但我们的框架确实使我们能够对全球野生动物丰度趋势做出更可靠的估计,这对于制定保护生物圈的政策至关重要。
In the face of rapid global change and an uncertain fate for biodiversity, it is vital to quantify trends in wild populations. These trends are typically estimated from abundance time series for suites of species across large geographic and temporal scales. Such data implicitly contain phylogenetic, spatial, and temporal structure which, if not properly accounted for, may obscure the true magnitude and direction of biodiversity change. Here, using a novel statistical framework to simultaneously account for all three of these structures, we show that the majority of current abundance trends estimates among 10 high-profile datasets, representing millions of abundance observations, are likely unreliable or incorrect. Our new approach suggests that previous models are too simplistic, incorrectly estimating global abundance trends and often dramatically underestimating uncertainty, an aspect that is critical when translating global assessments into policy outcomes. Further, our approach also results in substantial improvements in abundance forecasting accuracy. Whilst our results do not improve the outlook for biodiversity, our framework does allow us to make more robust estimates of global wildlife abundance trends, which is critical for developing policy to protect our biosphere.
DOI: 10.1111/geb.13210
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影响因子: 6.4
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