HOLOCENE BENTHIC FORAMINIFERAL ASSEMBLAGES OF TIDAL-INLET DEPOSITS ALONG CEDAR ISLAND, VA, USA: INSIGHTS INTO STORM IMPACTS, BREACH DYNAMICS, AND INLET EVOLUTION

Nesting success of Forster’s Terns (Sterna forsteri) was examined on two small islands in the Cedar Island area of North Carolina. Forster’s Terns laid an average of 2.1 eggs per nest (n = 50) on Chainshot Island and 2.1 eggs per nest (n = 43) on Harbor Island in clutches that consisted of 1 to 3 eggs. On Chainshot Island every egg (n = 107) was lost to predation. On Harbor Island, 72 of 92 eggs were preyed upon. A trapping program, initiated on both islands, yielded 32 Marsh Rice Rats (Oryzomys palustris). Stomach contents of 23 rats were inspected, with 92.3% from Chainshot Island and 70% of the stomachs from Harbor Island containing yolk and feathers of Forster’s Terns.

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Siltation rate and main anthropic impacts on sedimentation of the São Luís tidal inlet - State of Maranhão, Brazil

Brazilian Journal of Oceanography ◽

10.1590/s1679-87592016092106401 ◽

2016 ◽

Vol 64 (1) ◽

pp. 9-18 ◽

Cited By ~ 3

Author(s):

James Werllen de Jesus Azevedo ◽

Antonio Carlos Leal de Castro ◽

Marcio Costa Fernandes Vaz dos Santos

Keyword(s):

Coastal Management ◽

Land Reclamation ◽

Morphological Evolution ◽

Urban Expansion ◽

Tidal Inlet ◽

Sedimentation Rates ◽

Anthropogenic Influences ◽

Aerial Photos ◽

Management Policies ◽

Deposition Processes

Abstract In recent decades, intense human intervention in the coastal zone has given rise to severe siltation and erosion problems. This scenario is located the São Luís tidal inlet, formed by the mouths of the Anil and Bacanga rivers which due to various kinds of interference have been changing their sediment transport and deposition processes. With these changes in mind, this study sought to evaluate the evolution of the siltation and sedimentation rates in this area, as well as the main anthropogenic influences associated with this process. The methodology consisted in verifying the morphological evolution on the basis of the scanning and vectorization of nautical charts of 1947 and 1966, bathymetric surveys conducted in 2006, and aerial photos dating from 2011. The results show a silting up process coincident with interventions that occurred in the Anil and Bacanga river basins, with a volume of silt estimated at 8.5x106 m3, over the period from 1944 to 2011 (64 years), at a rate of 1.6 cm.yr-1. These processes are associated mainly with the construction of the Bacanga dam and land reclamation projects undertaken for the purpose of providing new areas for urban expansion. The evaluation of the results showed intense and advanced silting up of the São Luís tidal inlet, at rates proportionally greater than those of other estuaries, calling for corrective actions and the implementation of coastal management policies for this area.

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