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  • 1
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    Macroinvertebrate abundance in montane tropical streams of varying land-use, Ecuador (2010)
    PANGAEA
    In:  Supplement to: Bücker, Amelie; Sondermann, Martin; Frede, Hans-Georg; Breuer, Lutz (2010): The influence of land-use on macroinvertebrate communities in montane tropical streams - a case study from Ecuador. Fundamental and Applied Limnology, 177(4), 267-282, https://doi.org/10.1127/1863-9135/2010/0177-0267
    Details
    Publication Date: 2023-11-23
    Description: Despite the importance of tropical montane cloud forest streams, studies investigating aquatic communities in these regions are rare and knowledge on the driving factors of community structure is missing. The objectives of this study therefore were to understand how land-use influences habitat structure and macroinvertebrate communities in cloud forest streams of southern Ecuador. We evaluated these relationships in headwater streams with variable land cover, using multivariate statistics to identify relationships between key habitat variables and assemblage structure, and to resolve differences in composition among sites. Results show that shading intensity, substrate type and pH were the environmental parameters most closely related to variation in community composition observed among sites. In addition, macroinvertebrate density and partly diversity was lower in forested sites, possibly because the pH in forested streams lowered to almost 5 during spates. Standard bioindicator metrics were unable to detect the changes in assemblage structure between disturbed and forested streams. In general, our results indicate that tropical montane headwater streams are complex and heterogeneous ecosystems with low invertebrate densities. We also found that some amount of disturbance, i.e. patchy deforestation, can lead at least initially to an increase in macroinvertebrate taxa richness of these streams.
    Keywords: Alkalinity, total; Anacroneuria spp.; Anchytarsus spp.; Andesiops spp.; Argia spp.; Atanatolica spp.; Atopsyche spp.; Baetodes spp.; Cernotina spp.; Chimarra spp.; Chironomidae; Conductivity; Conductivity and pH meter, pH/Cond 340i (WTW, Weilheim); Corydalus spp.; Counting 〉500 µm fraction; DATE/TIME; DEPTH, water; Dineutus spp.; Diptera indeterminata; Ecuador; Elevation 2; Elmidae; Farrodes spp.; Flow meter; Flow velocity, water; Gravel, cover; Grumichella spp.; Haplohyphes spp.; Helicopsyche spp.; Hetaerina spp.; Hexatoma spp.; Human Dimensions; Individuals per area; Lakes & Rivers; Land Surface; Land use; LATITUDE; Leptohyphes spp.; Leptonema spp.; Limnocoris spp.; LONGITUDE; macroinvertebrates; Macrostemum spp.; Marilia spp.; Mortoniella spp.; mountains; Nectopsyche spp.; Organic matter; Oxygen; Oxygen meter Oxi320 with a CellOx325 sensor (WTW, Weilheim); pH; Phylloicus spp.; Planariidae; Polythore spp.; Psephenops spp.; Pyralidae; Rio_SanFrancisco; River; RIVER; Sample code/label; Sampling river; Sand; Shading; Sialis spp.; Simuliidae; Smicridea spp.; Stones, cover; Taxa per area; Temperature, water; Thraulodes spp.; Tipulidae; Titration; Triplectes spp.; Visual observation; Weighted; Width
    Type: Dataset
    Format: text/tab-separated-values, 2715 data points
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    DATA PANGAEA
  • 2
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    Räumliches Planen in Wissenschaft und Praxis – von „Mind the Gap“ zu „Finding Gaps“ (2017)
    De Gruyter
    Details
    Publication Date: 2017-02-28
    Print ISSN: 0034-0111
    Electronic ISSN: 1869-4179
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Published by De Gruyter
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    PAPER CURRENT
  • 3
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    Planungskultur als Sinnsystem. Eine Untersuchung am Beispiel kooperativer Stadtgrünentwicklung in Düsseldorf (2017)
    De Gruyter
    Details
    Publication Date: 2017-02-28
    Description: Zusammenfassung Wie vollzieht sich das normative Ideal kooperativer Stadtplanung in der Praxis? Am Beispiel kooperativer Stadtgrünentwicklung in Düsseldorf wird in dieser Arbeit qualitativ untersucht, wie zivilgesellschaftliche und politisch-administrative Akteure zusammenarbeiten. Dabei wird eine kulturelle Perspektive auf Planungspraxis eingenommen und die empirischen Beobachtungen mittels eines Grounded Theory-Ansatzes zu einem theoretischen Planungskultur-Modell abstrahiert. Es wird gezeigt, wie sich eine „Kultur des Miteinander” in der Düsseldorfer Stadtgrünentwicklung herausgebildet hat: Diese ist unter anderem gekennzeichnet durch eine lebendige Tradition der Zusammenarbeit und gemeinsame Orientierungen der Akteure. Sie zeigt sich beispielsweise in der Art und Weise, wie institutionelle Handlungsspielräume genutzt, organisatorische Strukturen angepasst und Verfahrensweisen verändert werden. In den theoretischen Schlussfolgerungen wird ein Verständnis von Planung aufgezeigt, welches die spezifischen Aushandlungsprozesse auf lokaler Ebene betont. Im Ergebnis werden lokale Planungskulturen als Sinnsysteme beschrieben, die sich kontextspezifisch durch Kommunikations-, Lern- und Annäherungsprozesse zwischen den beteiligten Akteursgruppen über die Zeit herausgebildet haben, deren Handeln leiten und sich in den Arten und Weisen der sozialen Raumproduktion widerspiegeln.
    Print ISSN: 0034-0111
    Electronic ISSN: 1869-4179
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Published by De Gruyter
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    PAPER CURRENT
  • 4
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    Application and validation of a new approach for modelling benthic invertebrate dispersal: First colonisation of a former open sewer system (2017)
    Elsevier
    Details
    Publication Date: 2017-12-01
    Print ISSN: 0048-9697
    Electronic ISSN: 1879-1026
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by Elsevier
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    PAPER CURRENT
  • 5
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    The influence of land-use on macroinvertebrate communities in montane tropical streams – a case study from Ecuador (2010)
    In:  EPIC3Fundamental and Applied Limnology / Archiv für Hydrobiologie, 177(4), pp. 267-282, ISSN: 1863-9135
    Details
    Publication Date: 2019-07-17
    Description: Despite the importance of tropical montane cloud forest streams, studies investigating aquatic communities in these regions are rare and knowledge on the driving factors of community structure is missing. The objectives of this study therefore were to understand how land-use influences habitat structure and macroinvertebrate communities in cloud forest streams of southern Ecuador. We evaluated these relationships in headwater streams with variable land cover, using multivariate statistics to identify relationships between key habitat variables and assemblage structure, and to resolve differences in composition among sites. Results show that shading intensity, substrate type and pH were the environmental parameters most closely related to variation in community composition observed among sites. In addition, macroinvertebrate density and partly diversity was lower in forested sites, possibly because the pH in forested streams lowered to almost 5 during spates. Standard bioindicator metrics were unable to detect the changes in assemblage structure between disturbed and forested streams. In general, our results indicate that tropical montane headwater streams are complex and heterogeneous ecosystems with low invertebrate densities. We also found that some amount of disturbance, i.e. patchy deforestation, can lead at least initially to an increase in macroinvertebrate taxa richness of these streams.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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    PAPER (OA)
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