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Ecological incumbency impedes stochastic community assembly in Holocene Foraminifera from the Huon Peninsula, Papua New Guinea

Claire E. Reymond, Michael Bode, Willem Renema and John Pandolfi
Ecological incumbency impedes stochastic community assembly in Holocene Foraminifera from the Huon Peninsula, Papua New Guinea
Paleobiology (September 2011) 37 (4): 670-685

Abstract

Persistence in the structure of ecological communities can be predicted both by deterministic and by stochastic theory. Evaluating ecological patterns against the neutral theory of biodiversity provides an appropriate methodology for differentiating between these alternatives. We traced the history of benthic foraminiferal communities from the Huon Peninsula, Papua New Guinea. From the well-preserved uplifted reef terrace at Bonah River we reconstructed the benthic foraminiferal communities during a 2200-year period (9000-6800 yr B.P.) of reef building during the Holocene transgressive sea-level rise. We found that the similarity of foraminiferal communities was consistently above 60%, even when comparing communities on either side of a massive volcanic eruption that smothered the existing reef system with ash. Similarly, species diversity and rank dominance were unchanged through time. However, similarity dropped dramatically in the final stages of reef growth, when accommodation space was reduced as sea-level rise slowed. We compared the community inertia index (CII) computed from the observed species abundances with that predicted from neutral theory. Despite the differences in foraminiferal community composition in the younger part of the reef sequence, we found an overall greater degree of community inertia with less variance in observed communities than was predicted from neutral theory, regardless of foraminiferal community size or species migration rate. Thus, persistent species assemblages could not be ascribed to neutral predictions. Ecological incumbency of established foraminiferal species likely prevented stochastic increases in both migrant and rare taxa at the Bonah River site. Regardless of the structuring mechanisms, our reconstruction of Holocene foraminiferal assemblages provides historical context for the management and potential restoration of degraded species assemblages.


ISSN: 0094-8373
EISSN: 1938-5331
Coden: PALBBM
Serial Title: Paleobiology
Serial Volume: 37
Serial Issue: 4
Title: Ecological incumbency impedes stochastic community assembly in Holocene Foraminifera from the Huon Peninsula, Papua New Guinea
Affiliation: University of Queensland, Australian Research Council Centre of Excellence for Coral Reef Studies, Saint Lucia, Queensl., Australia
Pages: 670-685
Published: 201109
Text Language: English
Publisher: Paleontological Society, Lawrence, KS, United States
References: 85
Accession Number: 2011-088077
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: NSF Grant EAR-0105543
Illustration Description: illus. incl. 1 table, geol. sketch map
S06°10'00" - S06°10'00", E47°40'00" - E47°40'00"
Secondary Affiliation: University of Melbourne, AUS, AustraliaNationaal Natuurhistorisch Museum Naturalis, NLD, Netherlands
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, The Paleontological Society. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201146
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