ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
Filter
  • Macroinvertebrates  (2)
  • nutrient status  (1)
Collection
Keywords
Publisher
Years
  • 1
    Electronic Resource
    Electronic Resource
    Macroinvertebrates in Dutch ditches: A typological characterization and the status of the Demmerik ditches (1989)
    Springer
    Aquatic ecology 23 (1989), S. 135-142 
    Details
    ISSN: 1573-5125
    Keywords: Macroinvertebrates ; ditches ; typology ; multivariate analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Different aspects of using a new multivariate analysis technique namely detrended canonical correspondence analysis (DCCA), for the elaboration of macrofaunal data from Dutch ditches are shown. In this technique a graphic representation is given of combined main biotic and abiotic parameters. Especially for typological purposes, this technique is promising. A typological scheme resulted from typifying ‘small, stagnant, line-shaped waters' or ditches in the province of Overijssel. All ditches were separated into eight major clusters. The most important related variables were acidity, drought, and stream velocity within which nutrient content/organic load diversified. The Demmerik ditches (see Hpigler and Verdonschot, 1989) represent larger sized ditches on a peaty substrate. They belong to the ‘real ditches’. Their taxon composition is most similar to that of clear, eutrophic, permanent ditches with a densely developed vegetation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02256730
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Macroinvertebrates in the Demmerik ditches (The Netherlands): The role of environmental structure (1989)
    Springer
    Aquatic ecology 23 (1989), S. 143-150 
    Details
    ISSN: 1573-5125
    Keywords: Macroinvertebrates ; ditches ; sampling methods ; microhabitats ; multivariate analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The relation between the different microhabitats and habitats and the quantitative distribution of macroinvertebrates was investigated as well as the applicability of different sampling devices. Data processing took place by means of multivariate analysis (Flexclus, Canoco). It was concluded that the spatial-physical structure is more important to macroinvertebrates than the plant species. In fact, this spatial physical structure can be indicated as the ‘mesh size’ of a (micro-)habitat. In order from open vegetation, shore/dense vegetation, artificial substrate, bottom material, and filamentous algae the ‘mesh size’ decresed. It is advisable to use different sampling devices to sample a macroinvertebrate community.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02256731
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Stream valleys as wetlands (1993)
    Springer
    Hydrobiologia 265 (1993), S. 265-279 
    Details
    ISSN: 1573-5117
    Keywords: lowland streams ; nutrient status
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Wetlands as a component of discharge areas have been reduced to mere stream channels in the larger part of The Netherlands. The original shape and condition are described with help of data from the past and from some small remnants. The typical Dutch type of running water is the lowland stream, fed predominantly by rain and groundwater. Its nature is nutrient-poor in the upper course and eutrophying gradually downstream. The chemical composition of streamwater, the vegetation in the floodplain and the flora and fauna in the stream reflect this gradient. Some attention is paid to the amount and cycling of minerals and nutrients. It is shown that the input of nutrients is not a limiting factor for primary production, but under natural conditions light is limiting. Threats to stream wetlands are the composition of the precipitation, fertilization of the discharge area and water management measures such as draining and canalization. As a result perspectives for a qualitative recovery are unfavourable. Restoration of the shape of streams, however, is more prospective and several restoration programs are in execution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00007272
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...