| AutorIn | | Name: | Gopal Prasad Khanal | Beurteilende*r| Name: | Assoc. Prof. Dr. Wolfram Graf | | Herkunftsbetrieb: | | | 1.Mitwirkender | | Name: | Dipl.-Ing. Dr.nat.techn. Anne Hartmann | | Herkunftsbetrieb: | | | 2.Mitwirkender | | Name: | Dipl.-Ing. Dr.nat.techn. Patrick Leitner | | Herkunftsbetrieb: | | | Arbeit | | Typ der Arbeit: | Masterarbeit | | Sprache der Arbeit: | Englisch | | Titel der Arbeit in Originalsprache: | Ecoregional and seasonal patterns of Macroinvertebrate communities in near-natural Bhutanese streams | | Titel der Arbeit in deutsch: | Ecoregional and seasonal patterns of Macroinvertebrate communities in near-natural Bhutanese streams | | Titel der Arbeit in englisch: | Ecoregional and seasonal patterns of Macroinvertebrate communities in near-natural Bhutanese streams | | Publikationsmonat: | 04.2021 | | Seitenanzahl: | 181 | | Volltext | | Volltext der Arbeit: | Volltext der Arbeit im PDF-Format laden | | Online-Katalog der Universitätsbibliothek Bodenkultur | | AC-Nummer: | AC16227202 | | Abstract | | Abstract in Deutsch: | The knowledge on aquatic biodiversity of Bhutan in general, and macrozoobenthos in particular, is scarce and needs strengthening. In view of inadequate understanding on community structure of macroinvertebrates, the objective of the present study was to characterize the community structure of macrozoobenthos across two aquatic ecoregions (ER): the Himalayan Subtropical Pine Forests (HSPF) and the Eastern Himalayan Broadleaf Forests (EHBF) to generate baseline information that can be used in conservation and management of riverine ecosystems. The present analysis, based on 46 near-natural sites, indicated distinct macroinvertebrate communities across ecoregions and across seasons within ecoregions. The communities at ecoregional scale were influenced by spatial factors (altitude) whereas within an ecoregion was influenced by local-scale factors (current velocity, riffle proportion etc.). Although EPT diversity was comparable, ER EHBF was associated with higher EPT (Ephemeroptera, Plecoptera, Trichoptera) abundance, whereas higher EPT dominance was associated with ER HSPF. The diversity and dominance of Trichoptera was higher in the ER HSPF, whereas the diversity and dominance of Diptera were higher in ER EHBF. In terms of functional feeding groups, dominance of collectors and scrapers were comparable across the ER HSPF, whereas gathering collectors were predominant across ER EHBF. Across both ecoregions, post-monsoon season was associated with higher diversity, abundance and EPT abundance. The dominance of Diptera became significant during post-monsoon season across ER HSPF, whereas Ephemeroptera and Plecoptera were significantly dominant during pre-monsoon season across ER EHBF. The distinct taxonomic and functional composition of macrozoobenthos, and high diversity of exclusive taxa verifies very clearly the ecoregional approach and lead to the conclusion that future macroinvertebrate-based assessment approaches in Bhutan should be ecoregion- and season specific. | | Abstract in Englisch: | The knowledge on aquatic biodiversity of Bhutan in general, and macrozoobenthos in particular, is scarce and needs strengthening. In view of inadequate understanding on community structure of macroinvertebrates, the objective of the present study was to characterize the community structure of macrozoobenthos across two aquatic ecoregions (ER): the Himalayan Subtropical Pine Forests (HSPF) and the Eastern Himalayan Broadleaf Forests (EHBF) to generate baseline information that can be used in conservation and management of riverine ecosystems. The present analysis, based on 46 near-natural sites, indicated distinct macroinvertebrate communities across ecoregions and across seasons within ecoregions. The communities at ecoregional scale were influenced by spatial factors (altitude) whereas within an ecoregion was influenced by local-scale factors (current velocity, riffle proportion etc.). Although EPT diversity was comparable, ER EHBF was associated with higher EPT (Ephemeroptera, Plecoptera, Trichoptera) abundance, whereas higher EPT dominance was associated with ER HSPF. The diversity and dominance of Trichoptera was higher in the ER HSPF, whereas the diversity and dominance of Diptera were higher in ER EHBF. In terms of functional feeding groups, dominance of collectors and scrapers were comparable across the ER HSPF, whereas gathering collectors were predominant across ER EHBF. Across both ecoregions, post-monsoon season was associated with higher diversity, abundance and EPT abundance. The dominance of Diptera became significant during post-monsoon season across ER HSPF, whereas Ephemeroptera and Plecoptera were significantly dominant during pre-monsoon season across ER EHBF. The distinct taxonomic and functional composition of macrozoobenthos, and high diversity of exclusive taxa verifies very clearly the ecoregional approach and lead to the conclusion that future macroinvertebrate-based assessment approaches in Bhutan should be ecoregion- and season specific. | | Schlagworte | | Schlagwörter Deutsch: | ASSESS-HKH, Bhutan, Eastern Himalayan Broadleaf Forests, Himalayan Subtropical Pine Forests, Ecoregions, macroinvertebrates, pre-monsoon, post-monsoon | | Schlagwörter Englisch: | ASSESS-HKH, Bhutan, Eastern Himalayan Broadleaf Forests, Himalayan Subtropical Pine Forests, Ecoregions, macroinvertebrates, pre-monsoon, post-monsoon | | Sonstiges | | Signatur: | D-22396 | | Organisationseinheit, auf der die Arbeit eingereicht wird: | H81200 Institut für Hydrobiologie und Gewässermanagement (IHG) | |
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