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  • Fragrance emission  (1)
  • Germany; KgM; KgM_2018; KgM_2019; Kleingewässermonitoring; MULT; Multiple investigations  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Rhythms of fragrance emission in flowers (1988)
    Springer
    Planta 174 (1988), S. 242-247 
    Details
    ISSN: 1432-2048
    Keywords: Flower fragrance ; Fragrance emission ; Diurnal rhythmicity (fragrance) ; Rhythmicity (flower fragrance)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A method for the sampling of volatiles emitted by individual flowers is described. Sampling over periods of 3 h allowed the examination of diurnal changes in quantity and quality of fragrance. In the species studied, Odontoglossum constrictum Lindl., Citrus medica L., Hoya carnosa R. Br., and Stephanotis floribunda Brongs., the fragrance was characterized by a few major components accompanied by a larger number of minor components. Flowers of all species produced volatiles in a rhythmical, diurnal fashion. Whereas in detached flowers of O. constrictum and C. medica rhythmicity could be observed for up to four cycles, flowers of H. carnosa showed this phenomenon only when attached to the plant. Maxima of emission were observed during the day in C. medica and O. constrictum whereas in H. carnosa it occurred during the night. In S. floribunda a conspicuous asynchronism of the emission of different volatiles was observed, resulting in the rhythmical change of fragrance quality.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00394777
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    Paper (German National Licenses)
    Fulltext
  • 2
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    The lowland stream monitoring dataset (KgM, Kleingewässer-Monitoring) 2018, 2019 (2021)
    PANGAEA
    Details
    Publication Date: 2024-06-25
    Description: Plant protection products in the environment are partly responsible for the progressive loss of biodiversity. The mostly insufficient ecological status of surface waters is often explained by habitat degradation and excessive nutrient input. But what role do plant protection products play in this context? The Kleingewässermonitoring (KgM) project provides a worldwide unique quantitative assessment of the impact of pesticides from diffuse agricultural sources on small and medium-sized streams. The dataset comprises 124 monitoring stream sections all over Germany covering a wide pollution gradient where consistent measurements were carried out in 2018 and 2019 during the major pesticide application period from April to July. These measurements include event-driven sampling to record surface rainfall-induced short-term peak concentrations in addition to regular grab sampling of pesticides and a wide range of other pollutants resulting in more than 1,000 water samples. All further relevant anthropogenic and environmental parameters reigning ecological stream quality were recorded comprehensively (morphological and stream bed structure, temperature, flow velocity, dissolved oxygen, pH, catchment land use, stream profile). The dataset also contains effect monitoring data featuring sampled invertebrate communities and bioassay analyses of water samples. The data enables an assessment of pesticide exposure and related effects as well as the analysis of complex causal relationships in streams.
    Keywords: Germany; KgM; KgM_2018; KgM_2019; Kleingewässermonitoring; MULT; Multiple investigations
    Type: Dataset
    Format: application/zip, 52.3 MBytes
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    DATA PANGAEA
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