Department of Ecology, Swedish University of Agricultural Sciences, Inst för Ekologi, Box 7044, 75007, Uppsala, Sweden.
Swedish Species Information Centre, Swedish University of Agricultural Sciences, Almas Allé 8E, Box 7007, 750 07, Uppsala, Sweden.
Ambio. 2022 Jan;51(1):183-198. doi: 10.1007/s13280-021-01550-w. Epub 2021 Mar 29.
Opportunistic reporting of species observations to online platforms provide one of the most extensive sources of information about the distribution and status of organisms in the wild. The lack of a clear sampling design, and changes in reporting over time, leads to challenges when analysing these data for temporal change in organisms. To better understand temporal changes in reporting, we use records submitted to an online platform in Sweden (Artportalen), currently containing 80 million records. Focussing on five taxonomic groups, fungi, plants, beetles, butterflies and birds, we decompose change in reporting into long-term and seasonal trends, and effects of weekdays, holidays and weather variables. The large surge in number of records since the launch of the, initially taxa-specific, portals is accompanied by non-trivial long-term and seasonal changes that differ between the taxonomic groups and are likely due to changes in, and differences between, the user communities and observer behaviour.
机会主义地将物种观测报告到在线平台上，为了解野生物种的分布和状况提供了最广泛的信息来源之一。由于缺乏明确的抽样设计，以及随着时间的推移报告的变化，在分析这些数据以了解生物体随时间的变化时，会带来挑战。为了更好地理解报告的时间变化，我们使用了瑞典（Artportalen）在线平台上提交的记录，目前包含 8000 万条记录。我们将报告中的变化分解为长期和季节性趋势，以及工作日、节假日和天气变量的影响。自最初针对特定类别的门户推出以来，记录数量的大幅增加伴随着非平凡的长期和季节性变化，这些变化在分类群之间存在差异，并且可能是由于用户群体和观测行为的变化以及差异所致。
