Modern intertidal foraminifera of the Outer Banks, North Carolina, USA and their applicability for sea-level studies.

TitleModern intertidal foraminifera of the Outer Banks, North Carolina, USA and their applicability for sea-level studies.
Publication TypeJournal Article
Year of Publication2008
AuthorsHorton B, Culver SJ
JournalJournal of Coastal Research
Volume24
Issue5
Pagination1110-1125
Date Published09/2008
KeywordsMicrofossils, Relative sea level, saltmarsh, vertical zonation
Abstract

We collected modern foraminiferal and environmental data from three back-barrier intertidal sites (Currituck Barrier Island, Oregon Inlet, and Pea Island) of the Outer Banks, North Carolina, United States, which have different salinity settings and a wind-driven tidal regime. The foraminiferal assemblages indicate that a vertical zonation of foraminifera occurs, with several significant site-specific variations of assemblages. The intertidal zone can be divided into two elements: first, an agglutinated assemblage that is restricted to the vegetated marsh and is dominated by Ammobaculites crassusAmmobaculites subcatenulatusArenoparrella mexicanaJadammina macrescens,Miliammina fusca, and Trochammina inflata and, second, a calcareous assemblage that dominates the mudflats and sandflats of the intertidal zone, characterized by Ammonia parkinsonianaElphidium excavatum, and Haynesina germanica. We used canonical correspondence analysis and partial canonical correspondence analyses of the foraminiferal and environmental data from the Outer Banks to support the hypothesis that the distribution of foraminifera in the intertidal zone is a direct function of elevation, with the duration and frequency of inundation as the most important factors. Partial canonical correspondence analyses and Monte Carlo permutation tests suggest that all available environmental variables except pH play a significant role in understanding the variations in foraminiferal data.

URLhttp://www.bioone.org/doi/abs/10.2112/08A-0004.1
DOI10.2112/08A-0004.1