Holocene benthic foraminiferal assemblages indicate long-term marginality of reef habitats from Moreton Bay, Australia

Narayan, Y.Roshni, Lybolt, Matt, Zhao, Jian-xin, Feng, Yuexing and Pandolfi, John M. (2015) Holocene benthic foraminiferal assemblages indicate long-term marginality of reef habitats from Moreton Bay, Australia. Palaeogeography, Palaeoclimatology, Palaeoecology, 420 49-64. doi:10.1016/j.palaeo.2014.12.010

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Author Narayan, Y.Roshni
Lybolt, Matt
Zhao, Jian-xin
Feng, Yuexing
Pandolfi, John M.
Title Holocene benthic foraminiferal assemblages indicate long-term marginality of reef habitats from Moreton Bay, Australia
Journal name Palaeogeography, Palaeoclimatology, Palaeoecology   Check publisher's open access policy
ISSN 0031-0182
1872-616X
Publication date 2015-02-05
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.palaeo.2014.12.010
Open Access Status File (Author Post-print)
Volume 420
Start page 49
End page 64
Total pages 16
Place of publication Amsterdam, The Netherlands
Publisher Elsevier
Language eng
Subject 1910 Oceanography
1105 Ecology, Evolution, Behavior and Systematics
1904 Earth-Surface Processes
1911 Palaeontology
Abstract Since European settlement (ca. 1824 CE), the subtropical inshore reefs of Moreton Bay have undergone rapid deterioration in water quality from changes in land-use practices, resource exploitation and rapid population growth, spurring marine managers to assess the drivers of ecological shifts. However, the short temporal-scale of most studies is an inadequate baseline for understanding the severity and magnitude of biological response. We present millennial-scale records employing palaeoecological and quantitative multivariate techniques within a concise chronological framework to analyse benthic foraminiferal community structure of reefs in Moreton Bay, Queensland. Well-constrained, UM-dated, millennial-scale records from sediment cores were used to document the long-term response of foraminifers to natural environmental variability. The temporal and spatial distribution patterns of foraminifers reveal long-term marginality throughout the similar to 7400 years of Holocene history, prior to European settlement. While specific faunal response to the effects of relative ENSO-climate and sea level fall are difficult to disentangle, the earlier phases of reef development are already represented by marginal taxa indicating possibly an earlier response to a decline in conditions. Overall, long-term consistency in conditions favoured two types of low diversity reef assemblages: 1) high density of small, heterotrophic and opportunistic species and 2) low density of photosymbiotic foraminiferal assemblages. Comparison of foraminiferal community composition between the Holocene and the present day indicates overlap in species composition supporting long-term marginality, particularly in the Western Bay. Such combined palaeoecological and recent studies can benefit long-term initiatives for monitoring present and future water quality conditions in the Bay's reef habitats. (C) 2014 Elsevier B.V. All rights reserved.
Formatted abstract
Since European settlement (ca. 1824 CE), the subtropical inshore reefs of Moreton Bay have undergone rapid deterioration in water quality from changes in land-use practices, resource exploitation and rapid population growth, spurring marine managers to assess the drivers of ecological shifts. However, the short temporal-scale of most studies is an inadequate baseline for understanding the severity and magnitude of biological response. We present millennial-scale records employing palaeoecological and quantitative multivariate techniques within a concise chronological framework to analyse benthic foraminiferal community structure of reefs in Moreton Bay, Queensland. Well-constrained, U/Th-dated, millennial-scale records from sediment cores were used to document the long-term response of foraminifers to natural environmental variability. The temporal and spatial distribution patterns of foraminifers reveal long-term marginality throughout the ~ 7400 years of Holocene history, prior to European settlement. While specific faunal response to the effects of relative ENSO-climate and sea level fall are difficult to disentangle, the earlier phases of reef development are already represented by marginal taxa indicating possibly an earlier response to a decline in conditions. Overall, long-term consistency in conditions favoured two types of low diversity reef assemblages: 1) high density of small, heterotrophic and opportunistic species and 2) low density of photosymbiotic foraminiferal assemblages. Comparison of foraminiferal community composition between the Holocene and the present day indicates overlap in species composition supporting long-term marginality, particularly in the Western Bay. Such combined palaeoecological and recent studies can benefit long-term initiatives for monitoring present and future water quality conditions in the Bay's reef habitats.
Keyword Benthic foraminifera
Bio indicators
Coral reefs
Holocene
Moreton Bay
Natural variability
Palaeoecology
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 13
LE0989067
1.14
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
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