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  • 1
    Online Resource
    Online Resource
    Acute and chronic toxicity of neonicotinoids to nymphs of a mayfly species and some notes on seasonal differences
    Wiley ; 2016
    In:  Environmental Toxicology and Chemistry Vol. 35, No. 1 ( 2016-01), p. 128-133
    Details
    In: Environmental Toxicology and Chemistry, Wiley, Vol. 35, No. 1 ( 2016-01), p. 128-133
    Abstract: Mayfly nymphs are among the most sensitive taxa to neonicotinoids. The present study presents the acute and chronic toxicity of 3 neonicotinoids (imidacloprid, thiacloprid, and thiamethoxam) to a mayfly species ( Cloeon dipterum ) and some notes on the seasonality of the toxicity of imidacloprid to C. dipterum and 5 other invertebrate species. Imidacloprid and thiamethoxam showed equal acute and chronic toxicity to a winter generation of C. dipterum , whereas thiacloprid was approximately twice as toxic. The acute and chronic toxicity of imidacloprid was much higher for the C. dipterum summer generation than for the winter one. The acute toxicity differs by a factor of 20 for the 96‐h 50% effective concentration (EC50) and by a factor of 5.4 for the chronic 28‐d EC50. Temperature had only a slight effect on the sensitivity of C. dipterum to imidacloprid because we only found a factor of 1.7 difference in the 96‐h EC50 between tests performed at 10 °C and 18 °C. The difference in sensitivity between summer and overwintering generations was also found for 3 other insect species. The results indicate that if the use and environmental fate of the 3 neonicotinoids are comparable, replacing imidacloprid by another neonicotinoid might not reduce the environmental impact on the mayfly nymph C. dipterum . The results also show the importance of reporting which generation is tested because sensitivity values of insects in the summer might be underestimated by the experiments performed with neonicotinoids and an overwintering population. Environ Toxicol Chem 2016;35:128–133. © 2015 SETAC
    Type of Medium: Online Resource
    ISSN: 0730-7268 , 1552-8618
    URL: Issue
    URL: Article
    DOI: 10.1002/etc.v35.1
    DOI: 10.1002/etc.3152
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 2027441-5
    SSG: 12
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  • 2
    Online Resource
    Online Resource
    Cryogel-PCL combination scaffolds for bone tissue repair
    Springer Science and Business Media LLC ; 2015
    In:  Journal of Materials Science: Materials in Medicine Vol. 26, No. 3 ( 2015-3)
    Details
    In: Journal of Materials Science: Materials in Medicine, Springer Science and Business Media LLC, Vol. 26, No. 3 ( 2015-3)
    Type of Medium: Online Resource
    ISSN: 0957-4530 , 1573-4838
    URL: Article
    DOI: 10.1007/s10856-015-5465-8
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2015
    detail.hit.zdb_id: 2016995-4
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  • 3
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    Intraspecific variation shapes community‐level behavioral responses to urbanization in spiders
    Wiley ; 2017
    In:  Ecology Vol. 98, No. 9 ( 2017-09), p. 2379-2390
    Details
    In: Ecology, Wiley, Vol. 98, No. 9 ( 2017-09), p. 2379-2390
    Abstract: Urban areas are an extreme example of human‐changed environments, exposing organisms to multiple and strong selection pressures. Adaptive behavioral responses are thought to play a major role in animals’ success or failure in such new environments. Approaches based on functional traits have proven especially valuable to understand how species communities respond to environmental gradients. Until recently, they have, however, often ignored the potential consequences of intraspecific trait variation ( ITV ). When ITV is prevalent, it may highly impact ecological processes and resilience against stressors. This may be especially relevant in animals, in which behavioral traits can be altered very flexibly at the individual level to track environmental changes. We investigated how species turnover and ITV influenced community‐level behavioral responses in a set of 62 sites of varying levels of urbanization, using orb web spiders and their webs as models of foraging behavior. ITV alone explained around one‐third of the total trait variation observed among communities. Spider web structure changed according to urbanization, in ways that increase the capture efficiency of webs in a context of smaller urban prey. These trait shifts were partly mediated by species turnover, but ITV increased their magnitude, potentially helping to buffer the effects of environmental changes on communities. The importance of ITV varied depending on traits and on the spatial scale at which urbanization was considered. Despite being neglected from community‐level analyses in animals, our results highlight the importance of accounting for intraspecific trait variation to fully understand trait responses to (human‐induced) environmental changes and their impact on ecosystem functioning.
    Type of Medium: Online Resource
    ISSN: 0012-9658 , 1939-9170
    URL: Issue
    URL: Article
    DOI: 10.1002/ecy.2017.98.issue-9
    DOI: 10.1002/ecy.1915
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 1797-8
    detail.hit.zdb_id: 2010140-5
    SSG: 12
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  • 4
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    Table_6.DOCX
    Frontiers Media SA ; 2021
    In:  Frontiers in Conservation Science Vol. 2 ( 2021-9-17)
    Details
    In: Frontiers in Conservation Science, Frontiers Media SA, Vol. 2 ( 2021-9-17)
    Abstract: Lagoonal environments exhibit high levels of instability depending on hydrological, climatic and ecological factors, thereby influencing the distribution and structure of submerged plant communities. Conditions typically fluctuate widely due to the interaction of freshwater from rivers with saltwater from the sea, as well as from aquaculture activities that together influence submerged hydrophyte community spatial and temporal variability depending on plant survival strategies. Ruppia species feature either underwater pollination mediated by an air bubble or by the release of pollen floating at the water surface, the former promoting self-pollination. Tropical Asian Ruppia brevipedunculata Yu and den Hartog was assumed to pollinate below the water surface and identified as a separate lineage among selfed Ruppia taxa. We used nine nuclear microsatellites to estimate inbreeding levels and connectivity of R. brevipedunculata within a large SE Asian lagoon complex. Ruppia brevipedunculata meadows were strongly inbred as could be derived from the many monomorphic or totally fixed loci for unique alleles in different parts of the lagoon, which appears consistent with selfing behavior. Those from aquaculture ponds were highly inbred ( F IS = 0.620), though less than open lagoon sites that showed nearly total inbreeding ( F IS = 0.942). Ruppia brevipedunculata from two major lagoon parts were highly differentiated with spatially structured gene pools and a strong barrier between parts of the lagoon over a 30 km distance. Migration-n analysis indicated unidirectional though limited gene flow and following potential hydrological connectivity. Overall, private alleles under homozygote conditions explained a stronger genetic differentiation of populations situated inside aquaculture ponds than of open lagoon populations. Kinship values were only relevant up to 5 km distance in the open lagoon. Within a confined area of aquaculture ponds featuring dense vegetation in stagnant water, there would be opportunity for mixed pollination, thereby explaining the higher diversity of unique multilocus genotypes of aquaculture pond habitats. Low connectivity prevents gene pools to homogenize however promoted sites with private alleles across the lagoon. Complex hydrodynamic systems and human-made habitats enclosed by physical structures impose barriers for propagule dispersal though may create refugia and contribute to conserving regional genetic diversity.
    Type of Medium: Online Resource
    ISSN: 2673-611X
    URL: Article
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    DOI: 10.3389/fcosc.2021.723376
    DOI: 10.3389/fcosc.2021.723376.s001
    DOI: 10.3389/fcosc.2021.723376.s002
    DOI: 10.3389/fcosc.2021.723376.s003
    DOI: 10.3389/fcosc.2021.723376.s004
    DOI: 10.3389/fcosc.2021.723376.s005
    DOI: 10.3389/fcosc.2021.723376.s006
    DOI: 10.3389/fcosc.2021.723376.s007
    DOI: 10.3389/fcosc.2021.723376.s008
    DOI: 10.3389/fcosc.2021.723376.s009
    DOI: 10.3389/fcosc.2021.723376.s010
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 3060831-4
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  • 5
    Online Resource
    Online Resource
    Table_6.DOCX
    Frontiers Media SA ; 2021
    In:  Frontiers in Plant Science Vol. 12 ( 2021-6-4)
    Details
    In: Frontiers in Plant Science, Frontiers Media SA, Vol. 12 ( 2021-6-4)
    Abstract: Human-induced land use in coastal areas is one of the main threats for seagrass meadows globally causing eutrophication and sedimentation. These environmental stressors induce sudden ecosystem shifts toward new alternative stable states defined by lower seagrass richness and abundance. Enhalus acoroides , a large-sized tropical seagrass species, appears to be more resistant toward environmental change compared to coexisting seagrass species. We hypothesize that reproductive strategy and the extent of seedling recruitment of E. acoroides are altered under disturbance and contribute to the persistence and resilience of E. acoroides meadows. In this research, we studied eight populations of E. acoroides in four lagoons along the South Central Coast of Vietnam using 11 polymorphic microsatellite loci. We classified land use in 6 classes based on Sentinel-2 L2A images and determined the effect of human-induced land use at different spatial scales on clonal richness and structure, fine-scale genetic structure and genetic diversity. No evidence of population size reductions due to disturbance was found, however, lagoons were strongly differentiated and may act as barriers to gene flow. The proportion and size of clones were significantly higher in populations of surrounding catchments with larger areas of agriculture, urbanization and aquaculture. We postulate that large resistant genets contribute to the resilience of E. acoroides meadows under high levels of disturbance. Although the importance of clonal growth increases with disturbance, sexual reproduction and the subsequent recruitment of seedlings remains an essential strategy for the persistence of populations of E. acoroides and should be prioritized in conservation measures to ensure broad-scale and long-term resilience toward future environmental change.
    Type of Medium: Online Resource
    ISSN: 1664-462X
    URL: Article
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    DOI: 10.3389/fpls.2021.658213
    DOI: 10.3389/fpls.2021.658213.s001
    DOI: 10.3389/fpls.2021.658213.s002
    DOI: 10.3389/fpls.2021.658213.s003
    DOI: 10.3389/fpls.2021.658213.s004
    DOI: 10.3389/fpls.2021.658213.s005
    DOI: 10.3389/fpls.2021.658213.s006
    DOI: 10.3389/fpls.2021.658213.s007
    DOI: 10.3389/fpls.2021.658213.s008
    DOI: 10.3389/fpls.2021.658213.s009
    DOI: 10.3389/fpls.2021.658213.s010
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 2687947-5
    detail.hit.zdb_id: 2613694-6
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