Temporal assemblage turnovers of intertidal foraminiferal communities from tropical (SE Caribbean) and temperate (NE England and SW Spain) regions

Ashleigh Costelloe, Brent Wilson, Benjamin Horton, Lee Ann C. Hayek

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This is the first quantitative study of temporal assemblage turnovers of the relationships between intertidal foraminifera. Time series datasets collected from tropical Caroni Swamp and Claxton Bay (Trinidad, SE Caribbean) and temperate Cowpen Marsh (NE England, U.K.) and Bay of Cadiz (SW Spain) were used. The assemblage turnover index (ATI) examined species interrelationships through comparisons of monthly or biweekly species proportional abundances over one or two years. Species contributing to major assemblage turnovers (ATI > x + σ) were identified using the conditioned on-boundary index (CoBI). Foraminiferal species are heterogeneously distributed within the sediment; multiple sample stations at a study location cumulatively represent the foraminiferal metacommunity and clusters represent foraminiferal assemblages. The ATI and CoBI were applied to the proportional abundances of live specimens recorded for the metacommunity and assemblages at each location. At Caroni Swamp and Claxton Bay, major assemblage turnovers were driven by the most abundant species and the majority coincided with seasonal change or the arrival of the seasonal Orinoco plume in the Gulf of Paria. Seasonal turnovers of the foraminiferal metacommunities at temperate Cowpen Marsh and Bay of Cádiz occurred during the summer and winter. Major assemblage turnovers in the upper Cowpen Marsh occurred in the summer, and the lower marsh in the winter. Foraminiferans are useful bioindicators for monitoring the health of coastal environments. Understanding foraminiferal population dynamics will allow cyclical changes to be differentiated from abrupt and persistent changes, which are related to anthropogenic disturbances or long-term climate change. The ATI and CoBI are useful indices for quantitatively exploring relationships of foraminiferal populations over time.

Original languageEnglish (US)
Pages (from-to)86-97
Number of pages12
JournalEstuarine, Coastal and Shelf Science
Volume204
DOIs
StatePublished - May 1 2018

Fingerprint

intertidal community
marshes
England
turnover
Spain
swamps
Paria
marsh
winter
Trinidad and Tobago
summer
anthropogenic activities
swamp
time series analysis
population dynamics
climate change
sediments
monitoring
index
bioindicator

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Aquatic Science

Keywords

  • Foraminifera
  • Intertidal
  • Seasonal
  • Temporal
  • Trends
  • Turnover

Cite this

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Temporal assemblage turnovers of intertidal foraminiferal communities from tropical (SE Caribbean) and temperate (NE England and SW Spain) regions. / Costelloe, Ashleigh; Wilson, Brent; Horton, Benjamin; Hayek, Lee Ann C.

In: Estuarine, Coastal and Shelf Science, Vol. 204, 01.05.2018, p. 86-97.

Research output: Contribution to journalArticle

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