Journal
INSECT CONSERVATION AND DIVERSITY
Volume 14, Issue 6, Pages 748-755Publisher
WILEY
DOI: 10.1111/icad.12513
Keywords
Attractiveness; biodiversity database; detectability; insect monitoring; temporal biases
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Funding
- Natural England
- Spanish Ministry of Science and Innovation [RYC2019-027446-I]
- Juan de la Cierva Incorporacion [IJC2018-036642-I]
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This study used the database of butterfly occurrences from Great Britain to explore trends in species recording over time, delimiting three main phases in the process of biodiversity recording and finding that entomologists tend to record attractive species more frequently during the taxonomic period, while detectable species are recorded more frequently during the exhaustive period. Awareness of these temporal patterns in recording is necessary for correctly interpreting and addressing bias in insect biodiversity trends.
The description of how biological information is compiled over time is essential to detect temporal biases in biodiversity data that could directly influence the utility, comparability, and reliability of ecological and biogeographical studies. We explore trends in species recording over time using one of the most spatially and temporally comprehensive country-level databases for any group of insects in the world - the database of butterfly occurrences from Great Britain. Firstly, we used two crucial milestones (the year in which the taxonomic inventory is complete, i.e., when the last species was recorded, the year in which all species are recorded together for the first time) to delimit three main phases in the process of biodiversity recording (taxonomic, faunistic and exhaustive phases). Secondly, we aimed to quantify how far species features (attractiveness and detectability) influence the process of recording through time. During the first stage of biodiversity compilation, when the main aim is to complete the taxonomic inventory (taxonomic period), entomologists tend to record attractive species more frequently. However, once the inventory is complete, particularly in the period during which more spatially and temporally comprehensive information about species distribution is amassed (the exhaustive period), the recording pattern clearly changes to more detectable species. Common, highly detectable species are undersampled in the first phase of biodiversity data compilation and oversampled in the final stages. Awareness of such temporal patterns in recording is necessary in order to correctly interpret and address bias in insect biodiversity trends.
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