GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    The Native Bees of Lolland (Denmark) Revisited after 100 Years: The Demise of the Specialists
    MDPI AG ; 2022
    In:  Insects Vol. 13, No. 2 ( 2022-01-31), p. 153-
    Details
    In: Insects, MDPI AG, Vol. 13, No. 2 ( 2022-01-31), p. 153-
    Abstract: There is a global concern over insect declines, including both species loss and population declines. In particular, declines of species, such as bees that anchor trophic interactions and shoulder many of the essential ecosystem services, have been the focus of broad public concern. However, our understanding of what characterizes those species that are lost because of declines over long periods is limited by a scarcity of comparative studies. We here compare the species composition from a collection of bees sampled over two decades (2000–2019) from the island of Lolland in Denmark, with a collection also sampled over two decades (1900–1919), but a century ago by Jørgensen and his contemporaries. We further test if (1) the probability that bee species that were sampled a century ago are also found today depends on their degree of floral specialization; (2) and use information from pollen samples from bees from the historical records to assess if certain floral resources have been lost. In total, 203 species were recorded in the two periods, but less than half, 92 species, occurred in both sampling periods. A total of 174 species of bees were recorded from 1900–1919, and 121 species were recorded from 2000–2019, including 29 species not reported in 1900–1919. Notably, we report a reduction in the species composition among forage specialist bees from 26.4% to 15.7% of the bee fauna, a consistent and highly significant decline both when correcting for parasitic and social species. Pollen swabs from bees collected in the first period, 1900–1919, did not identify any plants that are not available today but documented a series of plants that were important to bees back then. These plants are still common today, such as Taraxacum and Salix. Our findings highlight the importance of local and historical faunistic studies, such as that of Jørgensen, who was a resident schoolteacher on the island of Lolland in southern Denmark, for documenting how changes over time affect the species composition in bee communities.
    Type of Medium: Online Resource
    ISSN: 2075-4450
    URL: Article
    DOI: 10.3390/insects13020153
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2662247-6
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Spatio-temporal variation in species assemblages in field edges: seasonally distinct responses of solitary bees to local habitat characteristics and landscape conditions
    Springer Science and Business Media LLC ; 2014
    In:  Biodiversity and Conservation Vol. 23, No. 10 ( 2014-9), p. 2393-2414
    Details
    In: Biodiversity and Conservation, Springer Science and Business Media LLC, Vol. 23, No. 10 ( 2014-9), p. 2393-2414
    Type of Medium: Online Resource
    ISSN: 0960-3115 , 1572-9710
    URL: Article
    DOI: 10.1007/s10531-014-0729-z
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2014
    detail.hit.zdb_id: 2000787-5
    SSG: 12
    SSG: 23
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Evaluating competition for forage plants between honey bees and wild bees in Denmark
    Public Library of Science (PLoS) ; 2021
    In:  PLOS ONE Vol. 16, No. 4 ( 2021-4-28), p. e0250056-
    Details
    In: PLOS ONE, Public Library of Science (PLoS), Vol. 16, No. 4 ( 2021-4-28), p. e0250056-
    Abstract: A recurrent concern in nature conservation is the potential competition for forage plants between wild bees and managed honey bees. Specifically, that the highly sophisticated system of recruitment and large perennial colonies of honey bees quickly exhaust forage resources leading to the local extirpation of wild bees. However, different species of bees show different preferences for forage plants. We here summarize known forage plants for honey bees and wild bee species at national scale in Denmark. Our focus is on floral resources shared by honey bees and wild bees, with an emphasis on both threatened wild bee species and foraging specialist species. Across all 292 known bee species from Denmark, a total of 410 plant genera were recorded as forage plants. These included 294 plant genera visited by honey bees and 292 plant genera visited by different species of wild bees. Honey bees and wild bees share 176 plant genera in Denmark. Comparing the pairwise niche overlap for individual bee species, no significant relationship was found between their overlap and forage specialization or conservation status. Network analysis of the bee-plant interactions placed honey bees aside from most other bee species, specifically the module containing the honey bee had fewer links to any other modules, while the remaining modules were more highly inter-connected. Despite the lack of predictive relationship from the pairwise niche overlap, data for individual species could be summarized. Consequently, we have identified a set of operational parameters that, based on a high foraging overlap ( 〉 70%) and unfavorable conservation status (Vulnerable+Endangered+Critically Endangered), can guide both conservation actions and land management decisions in proximity to known or suspected populations of these species.
    Type of Medium: Online Resource
    ISSN: 1932-6203
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    DOI: 10.1371/journal.pone.0250056
    DOI: 10.1371/journal.pone.0250056.g001
    DOI: 10.1371/journal.pone.0250056.g002
    DOI: 10.1371/journal.pone.0250056.g003
    DOI: 10.1371/journal.pone.0250056.g004
    DOI: 10.1371/journal.pone.0250056.g005
    DOI: 10.1371/journal.pone.0250056.t001
    DOI: 10.1371/journal.pone.0250056.s001
    DOI: 10.1371/journal.pone.0250056.s002
    DOI: 10.1371/journal.pone.0250056.s003
    DOI: 10.1371/journal.pone.0250056.s004
    DOI: 10.1371/journal.pone.0250056.r001
    DOI: 10.1371/journal.pone.0250056.r002
    DOI: 10.1371/journal.pone.0250056.r003
    DOI: 10.1371/journal.pone.0250056.r004
    Language: English
    Publisher: Public Library of Science (PLoS)
    Publication Date: 2021
    detail.hit.zdb_id: 2267670-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Community level niche overlap and broad scale biogeographic patterns of bee communities are driven by phylogenetic history
    Wiley ; 2018
    In:  Journal of Biogeography Vol. 45, No. 2 ( 2018-02), p. 461-472
    Details
    In: Journal of Biogeography, Wiley, Vol. 45, No. 2 ( 2018-02), p. 461-472
    Abstract: Because the ecological similarity between species is expected to increase with relatedness and that speciation is a local process, phylogeny may provide a common measure for the influence of ecological and biogeographic processes on community assembly. We tested if similarities in floral visitation patterns within communities and the phylogenetic beta‐diversity among communities were related to the position of bees within the bee phylogeny. Location Global. Methods We combined a genus level phylogeny with within‐genera phylogenies for the bee species occurring within 18 globally distributed bee‐flower networks. Networks consisted of a matrix of bee and plant species and information on whether or not a bee species had been observed visiting flowers of a given plant species. For each network, we used Abouheif's C mean to test if the similarity in floral associations (niche similarity) between bees and the number of plant species visited displayed a significant phylogenetic signal. To test if biogeography influenced the relatedness among species within networks we tested if the phylogenetic beta‐diversity increased with geographical distance and dissimilarity in climatic conditions among networks. Results We found a phylogenetic signal for niche similarity in only 50% of the bee‐flower networks. However, network size influenced the likelihood of observing a phylogenetic signal and for seven of the eight bee‐flower networks with 〉 20 species it was statistically significant. On a global scale, the phylogenetic beta‐diversity increased with geographical distances and with climatic dissimilarity between sites. Main conclusions Bee communities are structured by processes of speciation and migration so that regional species pools are dominated by a subset of the global phylogenetic clades, resulting in increasing phylogenetic beta‐diversity with geographical distance. Moreover, ecological filtering processes operating at both local (floral resource use) and continental (climatic constraints) scale determine the distribution of species among resources and geographical regions. The assembly of bee communities should therefore be understood as a product of both biogeographic and community ecological processes.
    Type of Medium: Online Resource
    ISSN: 0305-0270 , 1365-2699
    URL: Issue
    URL: Article
    DOI: 10.1111/jbi.2018.45.issue-2
    DOI: 10.1111/jbi.13103
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 2020428-0
    detail.hit.zdb_id: 188963-1
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Does multi‐level environmental filtering determine the functional and phylogenetic composition of wild bee species assemblages?
    Wiley ; 2015
    In:  Ecography Vol. 38, No. 2 ( 2015-02), p. 140-153
    Details
    In: Ecography, Wiley, Vol. 38, No. 2 ( 2015-02), p. 140-153
    Abstract: A central goal in ecology is to develop theories that explain the diversity and distribution of species. The evolutionary history of species and their functional traits may provide mechanistic links between community assembly and the environment. Such links may be hierarchically structured such that the strength of environmental filtering decreases in a step‐wise manner from regional conditions through landscape heterogeneity to local habitat conditions. We sampled the wild bee species assemblages in power‐line strips transecting forests in south‐eastern Norway. We used altitude, landscape diversity surrounding sites and plant species composition, together with total plant cover as proxies for regional, landscape and local environmental filters, respectively. The species richness and abundance of wild bees decreased with altitude. The reduction in species richness and abundance was accompanied by a phylogenetic clustering of wild bee individuals. Furthermore, regional filters followed by local filters best explained the structure of the functional species composition. Sites at high altitudes and sites with Ericaceae‐dominated plant communities tended to have larger bees and a higher proportion of social and spring‐emerging bees. When Bombus species were excluded from the analysis, the proportion of pollen specialists increased with the dominance of Ericaceae. Furthermore, we also found that the taxonomic, phylogenetic and functional compositional turnover between sites was higher in the northern region than in the southern part of the study region. Altogether, these results suggest that regional filters drive the species richness and abundance in trait‐groups whereas local filters have more descrete sorting effects. We conclude that the model of multi‐level environmental filters provides a good conceptual model for community ecology. We suggest that future studies should focus on the relationship between the biogeographical history of species and their current distribution, and on the assumption that closely related species do indeed compete more intensely than distantly related species.
    Type of Medium: Online Resource
    ISSN: 0906-7590 , 1600-0587
    URL: Issue
    URL: Article
    DOI: 10.1111/ecog.2015.v38.i2
    DOI: 10.1111/ecog.00938
    Language: English
    Publisher: Wiley
    Publication Date: 2015
    detail.hit.zdb_id: 2024917-2
    detail.hit.zdb_id: 1112659-0
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...