TY - JOUR
KW - Biodiversity monitoring
KW - Citizen Science
KW - long-term change
KW - Occupancy-detection models
KW - range-shifting
KW - trait-based
AU - Bowler Diana E.
AU - Eichenberg David
AU - Conze Klaus-Jürgen
AU - Suhling Frank
AU - Baumann Kathrin
AU - Benken Theodor
AU - Bönsel André
AU - Bittner Torsten
AU - Drews Arne
AU - Günther André
AU - Isaac Nick J.B.
AU - Petzold Falk
AU - Seyring Marcel
AU - Spengler Torsten
AU - Trockur Bernd
AU - Willigalla Christoph
AU - Bruelheide Helge
AU - Jansen Florian
AU - Bonn Aletta
AB - Abstract Aim Recent studies suggest insect declines in parts of Europe; however, the generality of these trends across different taxa and regions remains unclear. Standardized data are not available to assess large-scale, long-term changes for most insect groups but opportunistic citizen science data are widespread for some. Here, we took advantage of citizen science data to investigate distributional changes of Odonata. Location Germany. Methods We compiled over 1 million occurrence records from different regional databases. We used occupancy-detection models to account for imperfect detection and estimate annual distributions for each species during 1980?2016 within 5 ? 5 km quadrants. We also compiled data on species attributes that were hypothesized to affect species? sensitivity to different drivers and related them to the changes in species? distributions. We further developed a novel approach to cluster groups of species with similar patterns of distributional change to represent multispecies indicators. Results More species increased (45%) than decreased (29%) or remained stable (26%) in their distribution (i.e. number of occupied quadrants). Species showing increases were generally warm-adapted species and/or running water species, while species showing decreases were cold-adapted species using standing water habitats such as bogs. Time series clustering defined five main patterns of change?each associated with a specific combination of species attributes, and confirming the key roles of species? temperature and habitat preferences. Overall, our analysis predicted that mean quadrant-level species richness has increased over most of the time period. Main conclusions Trends in Odonata provide mixed news?improved water quality, coupled with positive impacts of climate change, could explain the positive trends of many species. At the same time, declining species point to conservation challenges associated with habitat loss and degradation. Our study demonstrates the great value of citizen science and the work of natural history societies for assessing large-scale distributional change.
BT - Diversity and Distributions
DA - 2021/08/01
DO - https://doi.org/10.1111/ddi.13274
IS - 8
M3 - https://doi.org/10.1111/ddi.13274
N1 - https://doi.org/10.1111/ddi.13274
N2 - Abstract Aim Recent studies suggest insect declines in parts of Europe; however, the generality of these trends across different taxa and regions remains unclear. Standardized data are not available to assess large-scale, long-term changes for most insect groups but opportunistic citizen science data are widespread for some. Here, we took advantage of citizen science data to investigate distributional changes of Odonata. Location Germany. Methods We compiled over 1 million occurrence records from different regional databases. We used occupancy-detection models to account for imperfect detection and estimate annual distributions for each species during 1980?2016 within 5 ? 5 km quadrants. We also compiled data on species attributes that were hypothesized to affect species? sensitivity to different drivers and related them to the changes in species? distributions. We further developed a novel approach to cluster groups of species with similar patterns of distributional change to represent multispecies indicators. Results More species increased (45%) than decreased (29%) or remained stable (26%) in their distribution (i.e. number of occupied quadrants). Species showing increases were generally warm-adapted species and/or running water species, while species showing decreases were cold-adapted species using standing water habitats such as bogs. Time series clustering defined five main patterns of change?each associated with a specific combination of species attributes, and confirming the key roles of species? temperature and habitat preferences. Overall, our analysis predicted that mean quadrant-level species richness has increased over most of the time period. Main conclusions Trends in Odonata provide mixed news?improved water quality, coupled with positive impacts of climate change, could explain the positive trends of many species. At the same time, declining species point to conservation challenges associated with habitat loss and degradation. Our study demonstrates the great value of citizen science and the work of natural history societies for assessing large-scale distributional change.
PB - John Wiley & Sons, Ltd
PY - 2021
SN - 1366-9516
SP - 1353
EP - 1366
EP - 
T2 - Diversity and Distributions
TI - Winners and losers over 35 years of dragonfly and damselfly distributional change in Germany
UR - https://doi.org/10.1111/ddi.13274
VL - 27
Y2 - 2022/05/06
ER -