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The overgrowing, boring sponge Cliona viridis was studied on the Southwest coast of Grand Cayman Island, British West Indies. The surface area covered by the sponge was estimated using transect and quadrat surveys. Between 1 and 8 m depth, the average substrate coverage was 5%. Smaller sponge colonies were usually subcircular and larger colonies more dendritic. This change in shape may aid in exploiting new substrate. The sponge removes between 13.9% and 32.2% of the substrate as it expands laterally and produces an average erosional rate of 0.6 mm yr ⁻¹. Average sediment production rate is 1 kg m ⁻² yr ⁻¹. The chips produced by the sponge comprised only 0.0122% to 1.250% of the bottom sediments. Presumably, the majority of the sponge-produced sediments were transported out by water currents. / Thesis / Bachelor of Science (BSc)

Parks Canada focuses its tourism and conservation efforts in Kouchibouguac National Park along the park's diverse coastline made up of a variety of sensitive ecosystems including salt marshes, stream estuaries and a shifting barrier island lagoon system. The dynamic sediment processes in the park are not fully understood, making it difficult for Parks Canada to make informed decisions as sea-level rise in the region accelerates. In this study, extensive field data were collected in two sediment zones bordering the Kouchibouguac Lagoon. Stream data were collected and used to estimate the monthly average sediment load entering the lagoon. The maximum and minimum monthly average sediment loads were 130 g/s and 11 g/s in April and September, respectively. These freshwater sediments pass through estuaries to deposit at the coastline of the park. Changes in the barrier system surrounding the tidal inlet Little Gully were also monitored over 15 months using modern surveying techniques. The surveys showed a general southward shift in the study area and a landward migration of sediments within the flood tidal delta of the inlet. Dune surface area, volume, and vegetation cover were also examined, and the critical shear stress and velocity of the sediments were calculated. The field investigations revealed that the Kouchibouguac Lagoon was gradually filling in with sediments during the study. It is recommended that a permanent hydrometric station be installed in one of the major streams in the park and that future research along the coastline of the park complement Parks Canada's current monitoring program for the barrier island system.

This volume comprises ninety-one contributions to the Sediment 2011 conference of the Central European section of the Society for Sedimentary Geology (SEPM-CES) and the Geologische Vereinigung (GV) at the University of Leipzig held in June 2011. The central theme of this meeting was “Sediments: Archives of the Earth System” in order to bring together young and established researchers from all fields of soft-rock geology and beyond to shape a stimulating interdisciplinary program on the role of sediments in understanding the System Earth and the evolution of paleoenvironments and climate through time.

Thesis (M.S.)--Humboldt State University, 2008. / Includes bibliographical references (leaves 64-67). Also available via Humboldt Digital Scholar.

Thesis (M.S.)--University of North Carolina Wilmington, 2008. / Title from PDF title page (viewed May 27, 2009) Includes bibliographical references (p. 104-106)