Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"sandprawns"”.
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Effects of burrowing sandprawns (Callichirus kraussi) on urban estuarine water quality
Eutrophication, one of the leading global water pollution challenges, can be addressed with nature-based solutions (NBSs). NBSs use or mimic natural processes (ecosystem services) to improve water quality, for example microorganisms, plants and filter feeders have already been shown to mitigate …
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Endobenthic Ecosystem Engineering: influence of sandprawns (Callichirus kraussi) on zooplankton assemblages
… resource for filter feeders, any effect of sandprawns in reducing phytoplankton biomass may generate possible indirect effects on filter feeders such as zooplankton assemblages. To date, there has been no known research addressing questions on density of sandprawns and associated effects on …
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Impacts of burrowing sandprawns (Kraussillichirus kraussi) on water quality, phytoplankton and pelagic bacterial assemblages
… issue that requires addressing. Burrowing sandprawns (Kraussillichirus kraussi) have been shown in past research to improve water quality by removing microalgae from the water column. Their burrows are thought to act as biofiltration systems, with water-borne phytoplankton particles being …
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Interactive effects of temperature, nutrient level and sandprawns (Kraussillichirus kraussi) ecosystem engineering on microplankton community structure
… crustaceans (including Southern African sandprawns: Kraussillichirus kraussi) and microorganisms have proven to be an effective nature-based tools to improve and monitor coastal water quality respectively. Previous research has proposed that the below-ground burrow systems of K. kraussi …
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Interactions between ecosystem engineering by burrowing sandprawns (Callichirus kraussi) and nutrients: consequences for benthic community structure and ecosystem functioning
… was to investigate how ecosystem engineering by sandprawns C. kraussi and nutrient levels individually or interactively influence assemblages and ecological processes in coastal soft-sediment ecosystems. The study was carried out in Langebaan Lagoon, which is a marine lagoonal system on the west …
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Assessing the effects of trampling and bait-collecting on population, morphological and reproductive metrics of a key ecosystem engineer in Langebaan Lagoon
… Knowledge of how human disturbance impacts these sandprawns is however, limited as it is primarily focused on population-level metrics such as abundance and morphology. Therefore, this study aimed to advance our understanding of how human disturbance impacts sandprawn populations, their …
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Benthic and pelagic responses to endobenthic bioturbator (Kraussillichirus kraussi) density, temperature and eutrophication in a global change mesocosm experiment
… along with other benthic functions provided by sandprawns, is unclear given that they are nested within global change processes such as warming and eutrophication, which have the potential to alter fundamental benthic and pelagic processes mediated by sandprawns. In this context, this thesis …
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Benthic metrics as indicators of human disturbance in a marine-dominated lagoon
… a general trend of increasing dominance by sandprawns (Callichirus kraussi) from undisturbed to disturbed subsites, whilst the undisturbed subsites were numerically dominated by a several codominant polychaetes (Euclymene spp., Notomastus latericeus and Marphysa sanguinea). Interestingly, …
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Temporal interactions with flamingo foraging plasticity: ecological effects on basal resources and benthic heterogeneity
… negative effects of bioturbation by burrowing sandprawns on productivity, which is a dominant process in the study area. This study emphasizes the importance of Greater Flamingos in regulating basal resource supply, community structure and spatio-temporal heterogeneity and has highlighted the …
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Using benthic microalgae as an indicator of recreational disturbance associated with bait collection and trampling in Langebaan Lagoon, South Africa
… permits recreational activities such as bait (sandprawns: Kraussillichirus kraussi) harvesting, along a gradient of human density. Overall, results obtained from multivariate analysis indicate that human numbers were linked to the changes in microalgal assemblages in Zone A. However, in …
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Persistent pharmaceutical concentrations in an urban Western Cape Estuary and the effects on microalgal assemblages
… functionally important estuarine biota such as sandprawns and the functions they provide including biofiltration in South African estuaries are, to the best of my knowledge, unknown. Based on field sampling, high concentrations of pharmaceuticals were recorded in the Zandvlei Estuary, …