The use of historical collections to estimate population trends: A case study using Swedish longhorn beetles (Coleoptera: Cerambycidae)
The use of historical collections to estimate population trends: A case study using Swedish longhorn beetles (Coleoptera: Cerambycidae)
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DOI：
10.1016/j.biocon.2010.04.015
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发表时间：
2010-09-01
影响因子：
5.9
通讯作者：
Forslund, Par
中科院分区：
文献类型：
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作者：
Jeppsson, Tobias;Lindhe, Anders;Forslund, Par
估计物种之间的种群趋势的长期数据普遍缺乏。然而，自然历史收藏（NHC）可以提供这样的信息，但可能会受到偏见，由于不同的采样工作。为了分析瑞典长角甲虫（鞘翅目：天牛科）的种群趋势和范围-丰度动态，我们使用了108种超过100年的集合。我们通过使用数据库记录的总数作为非红色名录物种的参考来控制不同的采样工作。由于红名单物种的一般频率随着时间的推移而增加，因此对该组进行了单独的采样工作估计。我们观察到种群变化的种间差异很大，从60%的下降到几百%的增长。大多数物种表现出稳定或增加的范围，而少数似乎下降的范围。在增加的物种中，稀有物种似乎比常见物种更能扩大它们的分布范围，但在减少的物种中没有观察到这种模式。从历史上看，稀有物种似乎没有更大的局部灭绝风险，种群数量下降主要是由于种群密度降低，而不是亚种群的损失。我们还根据IUCN红色名录标准A评估了物种的下降，目前没有列入红色名录的四种物种符合建议的近危（NT）阈值。研究结果还表明，如果仅从物种分布范围的变化来估计，物种的减少可能会被忽视。(C)2010爱思唯尔有限公司版权所有。
Long term data to estimate population trends among species are generally lacking. However, Natural History Collections (NHCs) can provide such information, but may suffer from biases due to varying sampling effort. To analyze population trends and range-abundance dynamics of Swedish longhorn beetles (Coleoptera: Cerambycidae), we used collections of 108 species stretching over 100 years. We controlled for varying sampling effort by using the total number of database records as a reference for non-red-listed species. Because the general frequency of red-listed species increased over time, a separate estimate of sampling effort was used for that group. We observed large interspecific variation in population changes, from declines of 60% to several hundred percent increases. Most species showed stable or increasing ranges, whereas few seemed to decline in range. Among increasing species, rare species seemed to expand their range more than common species did, but this pattern was not observed in declining species. Historically, rare species did not seem to be at larger risk of local extinction, and population declines were mostly due to lower population density and not loss of sub-populations. We also evaluated the species' declines under IUCN red-list criterion A, and four currently not red-listed species meet the suggested threshold for Near Threatened (NT). The results also suggested that species' declines may be overlooked if estimated only from changes in species range. (C) 2010 Elsevier Ltd. All rights reserved.