Using biological records to infer long-term occupancy trends of mammals in the UK
Using biological records to infer long-term occupancy trends of mammals in the UK
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DOI：
10.1016/j.biocon.2021.109362
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发表时间：
2021-11-02
影响因子：
5.9
通讯作者：
Mathews, Fiona
中科院分区：
文献类型：
--
作者：
Coomber, Frazer G.;Smith, Bethany R.;Mathews, Fiona
保护行动通常是通过检测物种种群规模、地理范围或占有率（占有地点的比例）的趋势来触发的。决策者和从业人员往往需要对这些指标进行可靠的估计，但许多物种缺乏专门的监测计划。趋势估计的另一个数据来源是生物记录，即，物种存在信息。在英国，有数百万这样的记录，但生物趋势评估往往受到非结构化收集方式所造成的偏见的阻碍。占用模型的最新进展说明了调查工作和可探测性随时间的变化，这意味着现在可以从这些记录中估计出强劲的占用趋势。通过将哺乳动物物种分组为调查组合-可能同时记录的物种-并应用占用模型，本研究提供了英国37种陆生哺乳动物物种的长期（1970年至2016年）占用趋势的估计。这些物种的年际占有率增长率范围为-4.26%至11.25%。根据这一信息，将两个物种归类为大幅减少，五个物种归类为减少，12个物种归类为无变化，11个物种归类为增加，七个物种归类为大幅增加。从整体上看，小型哺乳动物的占有率增长率平均下降（-0.8% SD 1.57），而蝙蝠和鹿（0.9% SD 1.30）增加（分别为3.8% SD 3.25; 0.9% SD 1.30），中型哺乳动物稳定（-0.3 SD 1.72）。这些结果有助于一些数据缺乏物种的急需的信息，并提供优先保护行动的证据。
Conservation action is usually triggered by detecting trends in species' population size, geographical range, or occupancy (proportion of sites occupied). Robust estimates of these metrics are often required by policy makers and practitioners, yet many species lack dedicated monitoring schemes. An alternative source of data for trend estimation is provided by biological records, i.e., species presence information. In the UK, there are millions of such records, but biological trend assessments are often hindered by biases caused by the unstructured way in which they are collected. Recent advances in occupancy modelling that account for changes in survey effort and detectability over time mean that robust occupancy trends can now be estimated from these records. By grouping mammal species into survey assemblages - species likely to be recorded at the same time - and applying occupancy models, this study provides estimates of long-term (1970 to 2016) occupancy trends for 37 terrestrial mammal species from the UK. The inter-annual occupancy growth rates for these species ranged from -4.26% to 11.25%. This information was used to classify two species as strongly decreasing, five as decreasing, 12 as no change, 11 as increasing and seven as strongly increasing. Viewing the survey assemblages as a whole, the occupancy growth rates for small mammals were, on average, decreasing (-0.8% SD 1.57), whereas bats and deer (0.9% SD 1.30) were increasing (3.8% SD 3.25; 0.9% SD 1.30 respectively), and mid-sized mammals were stable (-0.3 SD 1.72). These results contribute much-needed information on a number of data deficient species, and provide evidence for prioritising conservation action.