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Impact of woody riparian vegetation along streams on aquatic biodiversity ; Auswirkung gehölzbestandener Uferrandstreifen entlang von Fließgewässern auf die aquatische Biodiversität
Riparian areas are key components of riverine systems forming the transition zone connecting the terrestrial and the aquatic realm. As such an ecotone, riparian areas are naturally valuable ecosystems in their own right, providing habitat and sustaining a high biodiversity including many specialist species. Furthermore, the riparian zone is functionally linked to many physical and biotic instream processes. In temperate regions riparian areas are vegetated naturally by a diverse plant community which is characterized by the presence of trees. Woody riparian vegetation facilitates many functions to the aquatic ecosystem such as retention of sediments, nutrients or pesticides. Additionally, canopy cover regulates light availability, therefore instream primary production, as well as water temperature, which further structures aquatic communities. Trees also provide inputs of leaves, twigs and large wood that provide food and habitat important for many adapted aquatic organisms. These functions are generally well documented suggesting that management of woody riparian vegetation is a promising tool in conservation and restoration efforts. However, some characteristics relevant for river managers still need further research. Against this background, Kail et al. (2021) investigate changes in water temperature related to gradual variations in canopy cover along small lowland streams as well as the length of stream sections required for water temperature to adapt to new conditions. It is shown, that within lengths still relevant to river managers (ca. 400 m) and feasible lateral widths (buffer width of 10 m), woody cover can reduce maximum water temperatures by as much as 4.6°C, which is substantial. In Le Gall et al. (2022), Palt et al. (2022) and Palt et al. (submitted) effects of woody riparian vegetation on macroinvertebrates, a biological quality element relied upon in management, are quantified. In contrast to expected trends based on evidence from literature, the impact of landuse at the catchment scale is found ...
Impact of woody riparian vegetation along streams on aquatic biodiversity ; Auswirkung gehölzbestandener Uferrandstreifen entlang von Fließgewässern auf die aquatische Biodiversität
Riparian areas are key components of riverine systems forming the transition zone connecting the terrestrial and the aquatic realm. As such an ecotone, riparian areas are naturally valuable ecosystems in their own right, providing habitat and sustaining a high biodiversity including many specialist species. Furthermore, the riparian zone is functionally linked to many physical and biotic instream processes. In temperate regions riparian areas are vegetated naturally by a diverse plant community which is characterized by the presence of trees. Woody riparian vegetation facilitates many functions to the aquatic ecosystem such as retention of sediments, nutrients or pesticides. Additionally, canopy cover regulates light availability, therefore instream primary production, as well as water temperature, which further structures aquatic communities. Trees also provide inputs of leaves, twigs and large wood that provide food and habitat important for many adapted aquatic organisms. These functions are generally well documented suggesting that management of woody riparian vegetation is a promising tool in conservation and restoration efforts. However, some characteristics relevant for river managers still need further research. Against this background, Kail et al. (2021) investigate changes in water temperature related to gradual variations in canopy cover along small lowland streams as well as the length of stream sections required for water temperature to adapt to new conditions. It is shown, that within lengths still relevant to river managers (ca. 400 m) and feasible lateral widths (buffer width of 10 m), woody cover can reduce maximum water temperatures by as much as 4.6°C, which is substantial. In Le Gall et al. (2022), Palt et al. (2022) and Palt et al. (submitted) effects of woody riparian vegetation on macroinvertebrates, a biological quality element relied upon in management, are quantified. In contrast to expected trends based on evidence from literature, the impact of landuse at the catchment scale is found ...
Impact of woody riparian vegetation along streams on aquatic biodiversity ; Auswirkung gehölzbestandener Uferrandstreifen entlang von Fließgewässern auf die aquatische Biodiversität
Palt, Martin (author) / Hering, Daniel
2023-04-24
Theses
Electronic Resource
English
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