https://commons.ru.ac.za/vital/access/manager/Index en-us 5 Hierarchical spatial structure and levels of resolution of intertidal grazing and their consequences on predictability and stability at small scales https://commons.ru.ac.za/vital/access/manager/Repository/vital:5707 Wed 12 May 2021 20:08:34 SAST ]]> Diet of coastal filter feeders : impact of factors operating at different scales https://commons.ru.ac.za/vital/access/manager/Repository/vital:5929 Wed 12 May 2021 19:10:20 SAST ]]> Effects of marine reserves on the biology of rocky intertidal limpets along the southern coast of South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:5680 Wed 12 May 2021 18:13:23 SAST ]]> The role of microzooplankton in carbon cycling in the Southern Ocean https://commons.ru.ac.za/vital/access/manager/Repository/vital:21066 Wed 12 May 2021 18:02:42 SAST ]]> A stable isotope approach to trophic ecology resolving food webs in intertidal ecosystems https://commons.ru.ac.za/vital/access/manager/Repository/vital:5771 Wed 12 May 2021 17:13:36 SAST ]]> Habitat segregation in competing species of intertidal mussels in South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:5706 Wed 12 May 2021 16:36:47 SAST ]]> The role of upwelling in determining the composition, species distribution and genetic structure of intertidal communities in a time of climate change https://commons.ru.ac.za/vital/access/manager/Repository/vital:28042 Wed 12 May 2021 16:22:51 SAST ]]> A genetic and ecophysiological comparison of co-occuring indigenous (Perna perna) and invasive (Mytilus galloprovincialis) intertidal mussels https://commons.ru.ac.za/vital/access/manager/Repository/vital:5613 Tue 16 Jul 2024 08:20:12 SAST ]]> Assessing the impact of climate change on mangrove crabs: the role of ontogenetic macrophysiology and settlement in the persistence of central and marginal populations https://commons.ru.ac.za/vital/access/manager/Repository/vital:19994 Thu 13 May 2021 14:49:35 SAST ]]> The conflict between adaptation and constraint : the case of the Siphonariid limpets https://commons.ru.ac.za/vital/access/manager/Repository/vital:5657 Thu 13 May 2021 07:18:37 SAST ]]> Large scale spatio-temporal forcing of pelagic-coastal coupling: disentangling the effects of environmental change on intertidal invertebrate recruitment https://commons.ru.ac.za/vital/access/manager/Repository/vital:30400 Thu 13 May 2021 07:07:53 SAST ]]> Large scale spatio-temporal forcing of pelagic-coastal coupling: disentangling the effects of environmental change on intertidal invertebrate recruitment https://commons.ru.ac.za/vital/access/manager/Repository/vital:39140 Thu 13 May 2021 06:43:16 SAST ]]> Molecular phylogeny, phylogeography and evolutionary adaptation of foraging behaviour amongst sympatric patellid limpets along the southern African shoreline https://commons.ru.ac.za/vital/access/manager/Repository/vital:5882 Thu 13 May 2021 05:49:20 SAST ]]> Fishing for resilience : herbivore and algal dynamics on coral reefs in Kenya. https://commons.ru.ac.za/vital/access/manager/Repository/vital:5877 1 yr in the absence of herbivores) and showed that sea urchins and browsing fishes were able to remove significant amounts of macroalgae where either herbivore was abundant. However, using multiple-choice selectivity assays and in situ video recordings, I found that browsing fishes fed very selectively with low overlap in diet among species, leading to low functional redundancy within a high diversity system. Finally, using long-term survey data (from 28 sites) to build a 43-year chronosequence, I showed that it is possible that the effects of herbivory will not be constant across transitions from open fishing to fishery closures through non-linear grazing intensity. Therefore, increases in herbivory within fisheries closures may not be immediate and may allow a window of opportunity for algae to go from turf to unpalatable macroalgae until scraping and browsing fishes fully recover from fishing (~ 20 years). The findings in this thesis are novel and raise concern over the potential implications of the slow recovery of parrotfishes or, given lower than expected functional redundancy in grazing effects, the absence of even one browsing fish species in fisheries closures. Overall, this thesis highlights the importance of herbivore community dynamics in mediating interactions among algae, and provides new insights for conservation and management actions that attempt to bolster the resilience of coral reefs.]]> Thu 13 May 2021 04:09:10 SAST ]]> Inter-individual variability and phenotypic plasticity : the effect of the environment on the biogeography, population structure, ecophysiology and reproduction of the sandhoppers Talorchestia capensis and Africorchestia quadrispinosa https://commons.ru.ac.za/vital/access/manager/Repository/vital:5846 Thu 13 May 2021 03:19:43 SAST ]]> Genetics and thermal biology of littorinid snails of the genera Afrolittorina, Echinolittorina and Littoraria (Gastropoda: Littorinidae) from temperate, subtropical and tropical regions https://commons.ru.ac.za/vital/access/manager/Repository/vital:5588 Thu 13 May 2021 03:05:37 SAST ]]> Genetic variation within two pulmonate limpet species, Siphonaria capensis and S. serrata along the South African coast https://commons.ru.ac.za/vital/access/manager/Repository/vital:5800 Thu 13 May 2021 01:59:52 SAST ]]> Dispersal, settlement and recruitment : their influence on the population dynamics of intertidal mussels https://commons.ru.ac.za/vital/access/manager/Repository/vital:5663 Thu 13 May 2021 00:50:49 SAST ]]> Environmental physiology of the intertidal limpets Patella (Prosobranchia) and Siphonaria (Pulmonata) https://commons.ru.ac.za/vital/access/manager/Repository/vital:5686 Thu 13 May 2021 00:30:05 SAST ]]> Intertidal patterns and processes : tracking the effects of coastline topography and settlement choice across life stages of the mussels perna perna and mytilus galloprovincialis https://commons.ru.ac.za/vital/access/manager/Repository/vital:5721 Mon 24 Jun 2024 15:12:51 SAST ]]>