@article{StreinzerChakravortyNeumayeretal.2019,
  author    = {Streinzer, Martin and Chakravorty, Jharna and Neumayer, Johann and Megu, Karsing and Narah, Jaya and Schmitt, Thomas and Bharti, Himender and Spaethe, Johannes and Brockmann, Axel},
  title     = {Species composition and elevational distribution of bumble bees (Hymenoptera, Apidae, Bombus Latreille) in the East Himalaya, Arunachal Pradesh, India},
  series = {ZooKeys},
  volume    = {851},
  journal   = {ZooKeys},
  doi       = {10.3897/zookeys.851.32956},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-201937},
  pages     = {71-89},
  year      = {2019},
  abstract  = {The East Himalaya is one of the world's most biodiverse ecosystems. However, very little is known about the abundance and distribution of many plant and animal taxa in this region. Bumble bees are a group of cold-adapted and high elevation insects that fulfil an important ecological and economical function as pollinators of wild and agricultural flowering plants and crops. The Himalayan mountain range provides ample suitable habitats for bumble bees. Systematic study of Himalayan bumble bees began a few decades ago and the main focus has centred on the western region, while the eastern part of the mountain range has received little attention and only a few species have been verified. During a three-year survey, more than 700 bumble bee specimens of 21 species were collected in Arunachal Pradesh, the largest of the north-eastern states of India. The material included a range of species that were previously known from a limited number of collected specimens, which highlights the unique character of the East Himalayan ecosystem. Our results are an important first step towards a future assessment of species distribution, threat, and conservation. Clear elevation patterns of species diversity were observed, which raise important questions about the functional adaptations that allow bumble bees to thrive in this particularly moist region in the East Himalaya.},
  language  = {en}
}
@article{MaihoffFriessHoissetal.2023,
  author    = {Maihoff, Fabienne and Friess, Nicolas and Hoiss, Bernhard and Schmid-Egger, Christian and Kerner, Janika and Neumayer, Johann and Hopfenm{\"u}ller, Sebastian and B{\"a}ssler, Claus and M{\"u}ller, J{\"o}rg and Classen, Alice},
  title     = {Smaller, more diverse and on the way to the top: Rapid community shifts of montane wild bees within an extraordinary hot decade},
  series = {Diversity and Distributions},
  volume    = {29},
  journal   = {Diversity and Distributions},
  number    = {2},
  doi       = {10.1111/ddi.13658},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-312126},
  pages     = {272-288},
  year      = {2023},
  abstract  = {Aim Global warming is assumed to restructure mountain insect communities in space and time. Theory and observations along climate gradients predict that insect abundance and richness, especially of small-bodied species, will increase with increasing temperature. However, the specific responses of single species to rising temperatures, such as spatial range shifts, also alter communities, calling for intensive monitoring of real-world communities over time. Location German Alps and pre-alpine forests in south-east Germany. Methods We empirically examined the temporal and spatial change in wild bee communities and its drivers along two largely well-protected elevational gradients (alpine grassland vs. pre-alpine forest), each sampled twice within the last decade. Results We detected clear abundance-based upward shifts in bee communities, particularly in cold-adapted bumble bee species, demonstrating the speed with which mobile organisms can respond to climatic changes. Mean annual temperature was identified as the main driver of species richness in both regions. Accordingly, and in large overlap with expectations under climate warming, we detected an increase in bee richness and abundance, and an increase in small-bodied species in low- and mid-elevations along the grassland gradient. Community responses in the pre-alpine forest gradient were only partly consistent with community responses in alpine grasslands. Main Conclusion In well-protected temperate mountain regions, small-bodied bees may initially profit from warming temperatures, by getting more abundant and diverse. Less severe warming, and differences in habitat openness along the forested gradient, however, might moderate species responses. Our study further highlights the utility of standardized abundance data for revealing rapid changes in bee communities over only one decade.},
  language  = {en}
}