Effects of long-term exclusion of the limpet Cymbula oculus (Born) on the distribution of intertidal organisms on a rocky shore

  title={Effects of long-term exclusion of the limpet Cymbula oculus (Born) on the distribution of intertidal organisms on a rocky shore},
  author={Gavin W. Maneveldt and Rosemary C. Eager and Aghmat Bassier},
  journal={African Journal of Marine Science},
  pages={171 - 179}
Zonation patterns on rocky shores are typically as a result of both physical factors and biological interactions. Physical factors generally set the upper limits of species distributions whereas biological interactions generally set their lower limits. However, recent research has shown that biological factors can also influence the upper limits of species' recruitment and colonisation. Whereas such evidence has been shown for rocky shores internationally, little experimental evidence exists… 
Determining the post-herbivore-exclusion effect on an intertidal community by the recovery response of a known dominant herbivore
Following a long-term herbivore-exclusion study (2003-2008) in the mid-eulittoral zone at Kalk Bay, Cape Town, South Africa, the post-herbivore-exclusion effect (12 years later) of the limpet Cymbula
Comparing community structure on shells of the abalone Haliotis midae and adjacent rock: implications for biodiversity
The effects on biodiversity of depletion of the South African abalone Haliotis midae, which is a long-lived species with a large corrugated shell that provides a habitat for diverse benthic organisms, is concerned.
Assessing the ecosystem effects of the abalone Haliotis midae from its diet and foraging behaviour
Evidence indicates that any ecosystem effects that subadults and adults of H. midae have as grazers will be weak because they feed mainly by trapping drift material, and the frequency of grazing and the incidence of consumption of attached algae are low.
Mechanisms of interference and exploitation competition in a guild of encrusting algae along a South African rocky shore
Within the marine benthos, space is considered an absolute requirement that is often in limited supply. The often-low availability of this essential resource causes species to interact competitively
Understanding the association between the non-geniculate coralline red alga Spongites discoidea and the mollusc Oxystele sinensis
Nearly all adult winkles Oxystele sinensis encountered in the Kalk Bay (Western Cape province, South Africa) shallow subtidal zone were observed to bear a thick, convoluted form of the non-geniculate coralline red alga Spongites discoidea, showing that O. sinensis is for the most part restricted to the shallow subt tidal zone and rockpools, whereas the morphologically similar O. tigrina is largelyrestricted to the intertidal zone.
Temporal variability in the isotopic niches of rocky shore grazers and suspension‐feeders
The data provide new insights into how syntopic rocky shore consumers coexist by partitioning their temporally variable food environment by measuring carbon and nitrogen stable isotope ratios and niche area.
Human-mediated drivers of change — impacts on coastal ecosystems and marine biota of South Africa
Coastal ecosystems are highly vulnerable to human-mediated drivers of global change because they are located at the land–ocean interface and often host centres of urbanisation and development. The
Heavy metal profiles in limpets and algae on the Eastern Cape coast of South Africa
Heavy metal pollution is an increasing threat to the marine environment and is a major health concern. Both marine limpets and algae have been employed as biomonitors elsewhere in the world, but
A synthesis of three decades of socio-ecological change in False Bay, South Africa: setting the scene for multidisciplinary research and management
Over the past three decades, marine resource management has shifted conceptually from top-down sectoral approaches towards the more systems-oriented multi-stakeholder frameworks of integrated coastal


The effects of excluding limpets from the lower balanoid zone of rocky shores in transkei, South Africa
  • A. Dye
  • Environmental Science
  • 1995
Seasonal effects were insignificant in colonization of areas from which grazers were excluded and settlement of the barnacle Tetraclita serrata was enhanced in the exclusion areas, but barnacles settled sporadically in the other treatments.
Algal Zonation in the New England Rocky Intertidal Community: An Experimental Analysis
Experimental investigations of the factors affecting zonation of macroscopic, benthic algae in the New England rocky intertidal region demonstrated that biological factors set the lower limits of these plants, and it is suggested that biogeographic ranges of some species may be similarly affected by biotic factors.
Recolonization of intertidal macroalgae in relation to gap size and molluscan herbivory on a rocky shore on the east coast of southern Africa
  • H. Dye
  • Environmental Science
  • 2006
The low intertidal on rocky shores in the Transkei region of southern Africa is characterized by extensive turfs of coralline algae. These turfs are punctuated by small gaps maintained by patellid
The effects of grazing by gastropods and physical factors on the upper limits of distribution of intertidal macroalgae
Experimental manipulations at midtidal levels were used to test hypotheses about the effects of grazing by molluses and of physical factors during low tide on this pattern of algal community structure, and the role of grazing in the diversity and structure of intertidal algal communities.
Community Development and Persistence in a Low Rocky Intertidal Zone
Results of manipulations during both primary and secondary succession indicate that Littorina littorea, the only large, abundant herbivore in the low zone, has no direct effect on perennating or established Chondrus, or on its extensive, encrusting holdfast.
Effects of interactions between algae and grazing gastropods on the structure of a low-shore intertidal algal community
The lower limit of distribution of C. tramoserica is apparently determined by the presence of rapidly growing, extensive beds of foliose algae at low levels on the shore, not due to the direct effects of physical factors associated with prolonged submersion, nor to the impact of predators.
Grazing Effects of Four Marine Intertidal Herbivores on the Microflora
Differences in grazer zonation and use of macroalgae, coupled with increased food availability during reproductive seasons (winter and spring), allow continued coexistence of these very similar herbivores.
Effects of herbivore grazing on the physiognomy of the coralline alga Spongites yendoi and on associated competitive interactions
This study has shown that incompletely overlapping distributions between strongly interacting species along a broad geographical gradient is not just a significant feature of the ecology of terrestrial, but also of marine ecosystems.