Aggregated data of abundance indices
For the reconstruction of flight peaks, an abundance index was calculated by relating records to search efforts based on the evidence of field activities left in the database by proficient observers. For this search-effort correction, we selected observers with at least 50 records of at least 10 butterfly species each year. As a measure of their collective search effort, we calculated the sum for each day of all the 100 × 100 m grid cells from which an observer had reported records (of any species, including non-butterflies; also including absence records). This method of ‘proven day-grid-visi... Mehr ...
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Dokumenttyp: | other |
Erscheinungsdatum: | 2021 |
Schlagwörter: | peacock butterfly / Aglais io / life history strategy / citizen science / change in voltinism / bivoltine / Belgium / climate change / Lepidoptera |
Sprache: | Englisch |
Permalink: | https://search.fid-benelux.de/Record/base-26580950 |
Datenquelle: | BASE; Originalkatalog |
Powered By: | BASE |
Link(s) : | https://zenodo.org/record/5139530 |