Long-term population trends in widespread British moths
Long-term population trends in widespread British moths
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广泛分布的英国蛾的长期种群趋势
DOI：
10.1023/b:jico.0000045810.36433.c6
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发表时间：
2004
影响因子：
1.9
通讯作者：
M. Warren
中科院分区：
文献类型：
--
作者：
K. F. Conrad;I. Woiwod;M. Parsons;R. Fox;M. Warren
自1968年以来，洛桑昆虫调查局在全英国范围内建立了一个光陷阱网络。根据这些数据，我们估计了有史以来第一个国家的丰富度指数和35年的人口趋势的338种常见的大型蛾。虽然每年运行的陷阱站点的数量不是恒定的，但有一个具有代表性的，分布均匀的核心陷阱已经运行了≥ 15年。作业地点捕获一个物种的比例和成功的陷阱的年几何平均渔获量被用来提供物种的范围和绝对丰度的估计。T是一个长期种群趋势指数，用于比较物种之间的趋势。T不受陷阱位点周转率的影响。显示显著减少的物种百分比（54%）是显示增加的物种百分比（22%）的两倍多。在整个英国发现的物种在南部，特别是东南部减少得最快，但南部分布的物种正在增加。初步概述的结果表明，栖息地和气候变化都可能在改变物种动态中发挥作用。对如此庞大的物种库的丰度和趋势作出估计，为进一步开展研究开辟了道路，将趋势与土地使用变化、气候变化和种间动态联系起来。
The Rothamsted Insect Survey has operated a Great Britain-wide network of light-traps since 1968. From these data we estimated the first ever national abundance indices and 35-year population trends for 338 species of common macro-moths. Although the number of trap sites which run each year is not constant, there is a representative, well-distributed core of traps that have run for ≥ 15 years. The proportion of operating sites catching a species and the annual geometric mean catch of successful traps were used to provide estimates of species range and absolute abundance. T, an index of long-term population trends, was used to compare trends among species. T was not biased by trap site turnover. The percentage of species displaying significant decreases (54%) was more than double that displaying increases (22%). Species found throughout Great Britain are decreasing most rapidly in the south and especially the southeast but species with a southerly distribution are increasing. Results of a preliminary overview suggest habitat and climate change may both play a role in changing species dynamics. The existence of estimates of abundances and trends for such a large species pool opens the way for much further research, linking trends with land-use changes, climate change and inter-specific dynamics.