Data presented in the paper "Invasive oysters as new hosts for native shell-boring polychaetes: using historical shell collections and recent field data to investigate parasite spillback in native mussels in the Dutch Wadden Sea"

Research objective: We investigated the potential spillback of the native shell-boring polychaete Polydora ciliata from invasive Pacific oysters (Crassostrea (Magallana) gigas) to native mussels (Mytilus edulis) in the Dutch Wadden Sea by means of a field survey and historical collections of M. edulis shells. Type of research, method & collection of data:We sampled dead and alive specimens of blue mussels, Pacific oysters and periwinkles (Littorina littorea) at three intertidal locations at the Wadden Sea island Texel in order to determine host preferences of P. ciliata. To test, whether P. ciliata infections in mussels changed after the invasion of the Pacific oyster, we analysed x-ray images for P. ciliata burrows in mussel shells stemming from long-term monitoring campaigns from intertidal and subtidal areas of the western Dutch Wadden Sea

New records of Diptera from the Republic of Mordovia, Russia

A list of 55 species of Diptera from families Tanypezidae (1 species), Megamerinidae (1), Acroceridae (1), Psilidae (5), Lonchaeidae (8), Strongylophthalmyiidae (1), Ephydridae (21) Scathophagidae (17 species) collected in the Republic of Mordovia is given. Of them Protearomyia withersi MacGowan, 2014 and Lonchaea baechlii MacGowan, 2016 are recorded from Russia for the first time. Five species, namely Megamerina dolium Fabricius, 1805, Lonchaea carpathica Kovalev, 1974, Ephydra scholtzi Becker, 1896, Strongylophthalmyia pictipes Frey, 1935 and Chamaepsila bicolor (Meigen, 1826), are new for Central part of European Russia. The families Acroceridae, Megamerinidae, Psilidae, Tanypezidae and Strongylophthalmyiidae as well as 53 species are recorded from the Republic of Mordovia for the first time

No saturation in the accumulation of alien species worldwide

Although research on human-mediated exchanges of species has substantially intensified during the last centuries, we know surprisingly little about temporal dynamics of alien species accumulations across regions and taxa. Using a novel database of 45,813 first records of 16,926 established alien species, we show that the annual rate of first records worldwide has increased during the last 200 years, with 37% of all first records reported most recently (1970–2014). Inter-continental and inter-taxonomic variation can be largely attributed to the diaspora of European settlers in the nineteenth century and to the acceleration in trade in the twentieth century. For all taxonomic groups, the increase in numbers of alien species does not show any sign of saturation and most taxa even show increases in the rate of first records over time. This highlights that past efforts to mitigate invasions have not been effective enough to keep up with increasing globalization.© The Author(s) 201

Behavioral responses of terrestrial mammals to COVID-19 lockdowns

COVID-19 lockdowns in early 2020 reduced human mobility, providing an opportunity to disentangle its effects on animals from those of landscape modifications. Using GPS data, we compared movements and road avoidance of 2300 terrestrial mammals (43 species) during the lockdowns to the same period in 2019. Individual responses were variable, with no change in average movements or road avoidance behavior, likely due to variable lockdown conditions. However, under strict lockdowns, 10-day 95th percentile displacements increased by 73%, suggesting increased landscape permeability. Animals' 1-hour 95th percentile displacements declined by 12%, and animals were 36% closer to roads in areas of high human footprint, indicating reduced avoidance during lockdowns. Overall, lockdowns rapidly altered some spatial behaviors, highlighting variable but substantial impacts of human mobility on wildlife worldwide