نتایج جستجو برای: rocky shores
تعداد نتایج: 8872 فیلتر نتایج به سال:
Adult specimens of the common edible limpet; Patella vulgata were collected from rocky shores of Abu-Quir, Alexandria, Egypt. There are two morphs of this species; the first morph has shell with projecting ribs from its aboral surface while, the second one with soft-surfaced shell. The authors used one of the most recent techniques; random amplified polymorphic DNA-polymerase chain reaction (RA...
To appreciate better how cichlids segregate along the trophic, spatial and temporal dimensions, it is necessary to understand the cichlids’ body design, and its role in resource partitioning.We investigatedbody shape variation, quanti ed using landmark-basedgeometricmorphometrics, among cichlid species belonging to algal and zooplankton feeders coexisting along the rocky shores of Lake Malawi,...
Assemblages associated with intertidal rocky shores were examined for large scale distribution patterns with specific emphasis on identifying latitudinal trends of species richness and taxonomic distinctiveness. Seventy-two sites distributed around the globe were evaluated following the standardized sampling protocol of the Census of Marine Life NaGISA project (www.nagisa.coml.org). There were ...
Biogenic substrata such as epibenthic mussel aggregations are common in coastal regions worldwide and harbour diverse assemblages of sessile and mobile species. However, colonisation patterns on biogenic substrata are still not well understood. We tested whether succession develops as a linear sequence of temporal changes in the species richness and community structure of sessile and mobile ass...
Ecological aspects of the intertidal fortuyniid oribatid mites Alismobates inexpectatus and Fortuynia atlantica and the selenoribatid Carinozetes bermudensis and Carinozetes trifoveatus were studied in the Bermuda islands. All species are stenotopic inhabitants of the marine littoral zone. Fortuynia atlantica and C. trifoveatus dwell predominantly in the lower eulittoral zone of rocky shores, A...
Global concern around substantial losses of biodiversity has led to the development a number monitoring programs. Networks were established obtain appropriate data on spatial and temporal variation marine species rocky shores. Recently, Marine Biodiversity Observation Network Pole Americas (MBON P2P) program was is coordinating surveys along coastal areas throughout continent. The goal this pap...
The genus Oxystele, a member of the highly diverse marine gastropod superfamily Trochoidea, is endemic to southern Africa. Members of the genus include some of the most abundant molluscs on southern African shores and are important components of littoral biodiversity in rocky intertidal habitats. Species delimitation within the genus is still controversial, especially regarding the complex O. i...
Kelp forests on coastal rocky shores are negatively impacted by sudden sediment loads that can occur with storms and floods. Using laboratory experiments, we studied the effects of sediment deposition on the survival of the large brown alga Eisenia bicyclis juveniles (zoospores and gametophytes) to quantify the potential impacts of particulate matter on kelp forests. The zoospore adhesion rate ...
Evidence of the AD 1755 tsunami consisting of the same type of accretions produced by the re-deposition of earlier sediments, has been recorded at three different height along the coast of Gibraltar: Along a shallow sandy shore, the tsunami wave reached a run-up of 2–3 m, whereas along steep, cliff–lined shores (Rosia Bay) it surpassed 5 m. An overwash deposit was also identiied at the bottom o...
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