Koos Biesmeijer's research while affiliated with Agricultural University of Athens and other places

... patterns of species and evolutionary processes across different time frames and geographical areas [1][2][3]. The investigation of such materials is of particular importance for rare or threatened species, such as large marine or terrestrial carnivores, often stored in old collections [4][5][6]. ...

... The agricultural reclamation and forestry operations may further negatively affect species to track the climate niche movement (Ordonez et al., 2014) and thus increase extinction risks (Hansen et al., 2020;Pillay et al., 2022). Therefore, future climate adaptation strategies should include specific types of agricultural land, such as cropland with high nature value (Doxa et al., 2010(Doxa et al., , 2012, and focus on the agricultural areas connected to PA networks (Kleijn et al., 2020). ...

... In addition to the humanitarian and economic consequences, the widespread environmental impacts of a conflict at this scale cannot be ignored (Figure 1). Ukraine harbors a great diversity of ecosystems, encompassing mountains (the Carpathians), grasslands (the Pontic-Caspian steppe), large rivers (the Dnieper and the Dniester), and coastal areas (the Azov Sea and the Black Sea), and is home to iconic threatened species such as the European bison (Bison bonasus), the thick shelled river mussel (Unio crassus), and the Crimean rowan (Sorbus tauricola), among many others (Gogaladze et al. 2020). ...

... The classic bird study skin, while representing state of the art science of the time, may not be the main specimen type accessioned during future growth of bird collections. Therefore museums are increasingly recognising their role in the storage and preservation of new types of collections associated with bird biodiversity, be that digital data (images, video, sound recording, scans) or biological tissues and samples which are suitable for diverse types of analyses (exemplified by the update on two large-scale avian DNA sequencing projects: B10K and openWings, presented by Peter Hosner of the Natural History Museum, Denmark, and the 64-author poster presented by Friedrike Woog of the Staatliches Museum für Naturkunde, Germany, on the European Raptor Specimen Bank; Movalli et al., 2019) (Figure 4). ...

... With continuous discharge into the environment, many compounds, especially persistent compounds, bioaccumulate in food webs and can reach higher predators including humans [6,7], whereas more polar compounds can be found in drinking water. For many chemicals present in small quantities that are often considered harmless when evaluated individually, there is an increasing concern about their toxic effects when assessed as a mixture [8,9]. ...

... Urbanisation in Europe is causing the decline of specialized species 103 . In general bee communities on our green roofs are made of polylectic species and less of oligolectic species (see appendix table A4 and table A2 in supplementary information), as a broader diet is likely best for facilitating species expansion in urban areas 25,[104][105][106] . ...

... This may result in decreased fecundity, abundance and survival of wild bees (Goras et al., 2016). As competition depends on numerous local factors and conditions, no consensus has been reached regarding the importance of competition of honey bees towards wild be species (Geldmann and González-Varo, 2018;Kleijn et al., 2018;Mallinger et al., 2017). It is, however, agreed that at high densities honeybees can inflict adverse effects on wild bee populations (Kleijn et al., 2018), with studies mostly reporting negative influences of managed honey bees on wild bees (Mallinger et al., 2017). ...

... A measure of population growth was calculated by determining the percent rate of change from the first sample to the second sample of both sealed brood and workers. Previous studies have found that colony strength and its rate of change is a reliable measure of colony health [35]. Equation (2) was used to estimate the percentage rate of colony population change between the first and second samplings of the colonies is described below. ...

... The mitochondrial cytochrome oxidase I gene (mtDNA-COI) is considered an important gene in the study of genetic diversity among and between insect populations, allowing inferences about gene flow, identification of species origin, phylogeography, determination of population structure, and other evolutionary relationships (Simon et al. 1994;Freeland et al. 2011;Pozebon et al. 2021). Molecular techniques have proven to be useful in studying populations and understanding the extent to which habitat fragmentation reduces the chances of persistence of resident pollinator populations (e.g., Darvill et al. 2006Darvill et al. , 2010Goulson 2008;Maebe et al. 2013Maebe et al. , 2015. ...

... This group of arctic bees is circumpolar in distribution, with five species known from North America and four from Eurasia (Williams et al. 2019). Rasmont et al. (2015) modeled future distributions of the four European Alpinobombus species under several climate change scenarios of increasing severity and concluded that all were at very high climate change risk, with projections of extirpation or extinction for three of the species by 2100. Lee, Williams, and Pearson (2019) assessed climate vulnerability for North American Alpinobombus species and concluded that they were at a higher risk of decline than more temperate alpine bumble bee species, illuminating the fact that in DNPP, some high-elevation tundra species are at increased risk because their range is also restricted to northern latitudes. ...