Essays about: "Benthic invertebrates"

Showing result 1 - 5 of 16 essays containing the words Benthic invertebrates.

  1. 1. Restoration effects on benthic macroinvertebrate diversity and community composition in a river

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Fredrik Laggar; [2023]
    Keywords : Benthic invertebrates; diversity; communtiy composition;

    Abstract : Physical restoration efforts are common methods to restore running waters containingdegraded ecosystems due to anthropogenic activities such as irrigation, ditching, dammingand flood prevention. The goal is usually to restore waters to a more natural state, creatingmore physically complex habitats supporting a larger number of species of both fish andinvertebrates, hence increasing biodiversity. READ MORE

  3. 2. Associations between body size polymorphism in Arctic charr and benthic invertebrate communities – clues to mechanisms for population differentiation?

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Andreas Sund; [2022]
    Keywords : arctic charr; benthic invertebrates; polymorphism;

    Abstract : Many fish populations in the north have divided into coexisting ecotypes that differ in body size. While such polymorphic fish populations have been studied for many years, the understanding of how different types of selection contribute to the formation of dwarf- and giant ecotypes remains limited. READ MORE

  4. 3. Freshwater bivalves with ecosystem engineering traits : The biodeposition rate of A. anatina and U. tumidus

    University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Author : Gullstrand Tova; [2022]
    Keywords : Freshwater bivalves; biodeposition rate; A. anatina; U. tumidus; faeces; pseudofaeces; duck mussel; swollen river mussel; Sötvattensmusslor; biodepositionshastighet; A. anatina; U. tumidus; avföring; pseudoavföring; allmän dammussla; spetsig målarmussla;

    Abstract : Freshwater bivalves of the family Unionidae have filter-feeding traits that alter freshwater ecosystems on several trophic levels. Filtration of organic and inorganic particulates in the water column transform matter through the mussel’s egestion before it is sequestered in the sediment, making it available as food for benthic invertebrates. READ MORE

  5. 4. Effects of native freshwater mussels and leaf debris on benthic macroinvertebrate abundance and diversity : A field experiment with Margaritifera margaritifera in Vasslabäcken, Örebro county

    University essay from Karlstads universitet/Institutionen för miljö- och livsvetenskaper (from 2013)

    Author : Kai Sven Onken; [2021]
    Keywords : bivalve; functional role; habitat modification; decomposition; biodeposition;

    Abstract : Organisms that are part of complex ecosystems interact not only with other organisms but also with their environment, affecting ecosystem functions. In aquatic ecosystems filter feeders affect ecosystem functioning by transferring energy and nutrients from the water to the benthos. READ MORE

  6. 5. Responses to declining zoobenthos abundance : Changes over time in diet and growth of Arctic charr (Salvelinus alpinus)

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Douglas Skarp; [2020]
    Keywords : charr; zoobenthos; growth; diet;

    Abstract : A decline in the density of zoobenthos has taken place in Lake Abiskojaure in the northern Swedish mountains between 1988 and 2019 but no response can be seen in the abundance (CPUE) of Arctic charr (Salvelinus alpinus) that feed mainly on benthic invertebrates. To evaluate if possible shifts in resource use of charr explain this lack of change in population abundance, stomach contents (i. READ MORE