Download or read book Effects of Vertical Structure on Inshore Artificial Reef Fish and Macroinvertebrate Communities written by Jason Allan Garwood and published by . This book was released on 2006 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Artificial Reef Evaluation written by William Seaman and published by CRC Press. This book was released on 2000-03-23 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beneath the coastal waters of the world lie thousands of artificial reefs. Some are old and retired freighters and ships that once plied the oceans of the world but now serve as habitats for marine life. Others are newer reefs that have been designed and built for specific applications. With the field of aquatic habitat technology continually growi
Download or read book The Effect of an Inshore Artificial Reef on the Community Structure and Feeding Ecology of Estuarine Fishes in Barataria Bay Louisiana written by Kirsten A. Simonsen and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Artificial Reef Morphology written by Barbara Chudzik Lea and published by . This book was released on 1994 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Summary of Pertinent Information on the Attractive Effects of Artificial Structures in Tropical and Subtropical Waters written by Michael P. Seki and published by . This book was released on 1983 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reef Fish Community Structure microform an Experimental Study Using Small Artificial Reefs in Barkley Sound British Columbia written by Gascon, Dominique and published by National Library of Canada. This book was released on 1982 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using small artificial reefs made of cement blocks, a community of shallow water reef fishes was experimentally studied in Barkley Sound (British Columbia) to examine the structuring mechanisms in this assemblage The community under study inhabited a shallow reef made of rock boulders. The abundance of fish fluctuated with the seasons The species diversity of this fish community was low (H' = 0.3-10), one species (Coryphopterus nicho/si) comprising more than 80% of the individuals present Four species of rockfishes ( Sebastes caurinus, S. ma/iger, S. me/anops, and S. pinniger) and three species of benthic fishes (Hexagrammos decagrammus, Jordania zonope, and Artedius spp.) were also common. Experimental communities were established on ten identical artificial reefs made of cement blocks. Two series of reefs, built six months apart on sand 10 m away from the natural reef, tested the effects of seasons on community development. A third series, built in direct contact with the natural reef, examined the effects of distance and isolation on community development In each series a species equilibrium (approximately 6 species) was reached within six months The specific composition of the artificial reefs was similar to that of the natural reef, although species other than Coryphopterus nicho/si were more abundant Both juveniles and adults of all species were present, except for the rockfishes, which were represented only by young individuals. Tagging indicated that the benthic species remained permanently on the reefs, whereas a yearly turnover in rockfishes occurred The intensity of interactions between species was estimated by measuring shifts in habitat use on the artificial reefs. Only Sebastes me/anops showed consistent shifts in its space use in response to changes in the density of other species Only two of these shifts appeared to be the result of interspecific competition. Interactions between species, with the exception of S. me/anops had little effect on the spatial distribution of fish within the reefs. I examined the significance of the patterns of similarity between communities inhabiting identical habitats. High similarity values are usually interpreted as indicating the equilibrium status -- that is communities structured primarily by interspecific competition -- of a community, whereas low values are usually interpreted in the opposite direction -- i.e non-equilibrium communities structured by mechanisms other than interspecific competition (mostly stochastic events). This was tested using a randomization test. The null hypothesis of the test was that random colonization from the surrounding habitats was sufficient to explain the community structure on the artificial reefs. Six additional reefs (one third the original size) were built to test the effects of habitat size on community structure. The observed values on the reefs did not differ significantly from the null values, indicating that mechanisms, such as competition, were not required to explain the structure of the community. Habitat size had a strong effect, and the interpretations of previous studies were re-examined in light of this finding.
Download or read book Oceanic Abstracts written by and published by . This book was released on 1997-10 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reef Fish Community Structure at Unpublished Artificial Reef Sites Off Northwest Florida written by Michael Allen Dance and published by . This book was released on 2008 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book World Seas An Environmental Evaluation written by Charles Sheppard and published by Academic Press. This book was released on 2018-09-07 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt: World Seas: An Environmental Evaluation, Second Edition, Volume Three: Ecological Issues and Environmental Impacts covers global issues relating to our seas, including a biological description of the coast and continental shelf waters, the development and use of the coast, landfills and their effects, pollutant discharges over time, the effects of over-fishing, and the management methods and techniques used to ensure continued ecosystem functioning. The relative importance of water-borne and airborne routes differ in different parts of the world is explored, along with extensive coverage of major habitats and species groups, governmental, education and legal issues, fisheries effects, remote sensing, climate change and management. This book is an invaluable, worldwide reference source for students and researchers concerned with marine environmental science, fisheries, oceanography and engineering and coastal zone development. Provides scientific reviews of regional issues, empowering managers and policymakers to make progress in under-resourced countries and regions Covers environmental issues arising from the human use of both the sea and its watershed Presents informed commentary on major trends, problems and successes, and recommendations for the future
Download or read book Community Structure of Demersal Temperate Reef Fish at Artificial and Natural Reefs in South Carolina as a Function of Reef Age and Season written by Carly Altizer and published by . This book was released on 2013 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: Artificial reefs serve numerous important functions in the South Atlantic Bight by providing new recreational fishing and diving locations, contributing to state economies, and providing additional habitat for economically valuable reef fishes. However, little is known about how fish communities develop in temperate regions once a new reef is deployed, how they compare to adjacent natural reefs, and how these communities are influenced by season. Therefore, SCUBA video surveys were conducted over a 13-year period (1999-2012) at four unpublished artificial reef sites, three published artificial reef sites of varying ages, and two natural reef sites to assess the impacts of ecological succession and seasonality on species richness, diversity, evenness, fish density, and community structure. Season and reef age had significant effects on diversity and community structure at the unpublished sites, while season alone accounted for these trends at the published sites. Black seabass and tomtate dominated reef fish community structure at the published sites, while economically valuable species, such as groupers and snappers, were more abundant at the unpublished and natural reef sites. These results suggest that fish communities develop quickly at new artificial reefs (i.e., within the first year post-deployment) and that fishing pressure on publicly known reefs may obscure or even prevent community succession.
Download or read book Ecology Abstracts written by and published by . This book was released on 1999 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coverage: 1982- current; updated: monthly. This database covers current ecology research across a wide range of disciplines, reflecting recent advances in light of growing evidence regarding global environmental change and destruction. Major ares of subject coverage include: Algae/lichens, Animals, Annelids, Aquatic ecosystems, Arachnids, Arid zones, Birds, Brackish water, Bryophytes/pteridophytes, Coastal ecosystems, Conifers, Conservation, Control, Crustaceans, Ecosyst em studies, Fungi, Grasses, Grasslands, High altitude environments, Human ecology, Insects, Legumes, Mammals, Management, Microorganisms, Molluscs, Nematodes, Paleo-ecology, Plants, Pollution studies, Reptiles, River basins, Soil, TAiga/tundra, Terrestrial ecosystems, Vertebrates, Wetlands, Woodlands.
Download or read book The Effects of Artificial Structures on Estuarine Infaunal Communities and Offshore Biofouling Communities written by Maritza Mendoza and published by . This book was released on 2016 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: For hundreds of years, coastal and marine ecosystems have experienced increasing threats due to the cumulative effects of increasing population growth and dependence on these ecosystems. Thus, there has been increased enthusiasm to mitigate the negative effects of human actions through the use of cleaner sources of energy, like marine renewable energy (MRE). The U.S. West Coast shows potential for tidal, wave, and offshore wind energy. Concern about MRE deployments has motivated research on the environmental effects of these new man-made hard structures in the ocean. Although this kind of development is relatively new in the U.S, placing man-made hard structure in coastal and marine ecosystems around the world has shown to create new habitat for algae, invertebrates, and fish and create foraging opportunities for birds and mammals, eventually becoming an artificial reef. The overall goal of my research was to use existing artificial structures to investigate a few specific effects of MRE development in Oregon waters. My research had two components: to assess the extent to which soft-sediment habitats are influenced by the presence of artificial structures deployed in Yaquina Bay, OR, and to characterize the biofouling communities present on bottom and surface artificial structures deployed offshore. Previous research indicates artificial structures modify sediment composition by increasing the erosion around a structure and that there is a close link between infaunal communities and sediment composition. Grain size analyses confirmed artificial structures change the physical environment around them, although these differences were not sufficient to cause a visible change in infaunal communities. Sediment characteristics also did not explain the greater infaunal abundances, mainly of Capitellidae polychaetes, closer to the structures than further away. Results indicated there were significant differences in sediment characteristics between locations in Yaquina Bay, most likely because of the greater amount of fine sediment at the sites located further upstream than those located closer to the mouth of the estuary. These differences in sediment characteristics appeared to be large enough to see a grouping of infaunal communities with location in Yaquina Bay. This study provided additional evidence that artificial structures alter their physical environment, but these structures and physical effects did not change the composition of the infaunal communities after a period of eight years. Assessing the biofouling cover on the offshore bottom and surface artificial structures showed that after a period of two years, the biofouling communities on the offshore bottom structures mostly consisted of balanoid barnacles, which resulted in little biomass. The bottom structures appeared to have been tipped over during their time in the water, potentially preventing the biofouling communities from developing more. In contrast, the surface artificial structures had greater overall cover, although cover mostly consisted of algae and gooseneck barnacles. Mussels, amphipods, crabs, and bivalves were found within the algae demonstrating the additional structure provided by the algae supported a greater variety of organisms on the surface structure. This study provided a “snapshot” of possible biofouling communities on offshore artificial structures, but longitudinal studies would enable us to monitor the development of the biofouling communities on these structures to better understand the mechanisms that caused the observed biofouling communities. Conducting these studies in an estuarine environment where in-stream tidal energy could be developed and in an offshore environment where wave energy devices would be deployed supplies greater specific knowledge about the possible effects of MRE devices in Oregon waters and also demonstrates the importance of site-specific research.
Download or read book Artificial Reefs in Fisheries Management written by Stephen A. Bortone and published by CRC Press. This book was released on 2011-05-09 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: While artificial reefs may have much to offer, they remain an anecdote in the greater scheme of fisheries management, primarily due to the lack of data specific to validating their use. Based on papers presented at the 9th Conference on Artificial Reefs and Artificial Habitats (CARAH) and also including original articles written for this reference,
Download or read book Canadian Journal of Zoology written by and published by . This book was released on 2011-07 with total page 746 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Three Substrate Variables on Two Artificial Reef Fish Communities written by Charlie Ray Chandler and published by . This book was released on 1983 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Fish Predation on Macroinvertebrate Community Structure written by James Willis Wright and published by . This book was released on 1993 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Large scale Habitat Modification on Fish and Invertebrate Communities Within Alabama s Artificial Reef Permit Zone written by Trey Patrick Spearman and published by . This book was released on 2015 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
