Relationship between benthic foraminiferal assemblages and environmental factors in atoll lagoons of the central Tuamotu Archipelago (French Polynesia)

Bicchi, Erica; Debenay, Jean-Pierre; Pagès, Jean

doi:10.1007/s00338-002-0245-6

Cited by 35 publications

(29 citation statements)

References 31 publications

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“…This assemblage occurs at the greatest lagoonal depths of 16.3 m in core G5 and indicates the lowest species diversity for Glovers Reef. This is in contradiction to the suggestion of BICCHI et al (2002) of increasing species richness with increasing water depths. The water depths at Glovers Reef indicate a lower influence on the benthic foraminiferal diversity.…”

Section: 2)contrasting

confidence: 99%

“…5.5d). An increase in species richness with increasing water depths, as described by BICCHI et al (2002) was only found at Lighthouse Reef (Fig. 5.5c), however the correlation is statistically not significant (R 2 = 0.0416; p>0.005).…”

Section: 2)mentioning

confidence: 85%

“…According to BICCHI et al (2002), in core L1, the species diversity increased with increasing water depths from 3,750 -1,405 years BP, and core L6 indicate decreasing diversity with decreasing water depths. However, in cores L4 and L5 the species diversity increased with decreasing paleo-lagoon depths during the last 3,850 years.…”

Section: 2)mentioning

confidence: 97%

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Possible Fossil Echinoid Mass Mortality Detected in Holocene Lagoons, Belize

Gischler

2010

PALAIOS

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The development of benthic foraminiferal assemblages during the past 6,000 yrs was investigated in Holocene sediment cores from three carbonate platforms (Turneffe Islands, Lighthouse Reef, and Glovers Reef) Based on cluster analyses, seven benthic foraminiferal assemblages are distinguished during the Holocene.The three platforms exhibit characteristic differences in benthic foraminiferal fauna and diversity, which are controlled by their respective environments during the last 6,000 yrs. Turneffe Islands has four benthic foraminiferal assemblages, which are typical for restricted lagoons with fluctuating salinity. Lighthouse Reef is inhabited by two benthic foraminifera associations, which are characteristic of high water exchange with the surrounding ocean and clear waters. Glovers Reef is characterized by two benthic foraminiferal assemblages, which occur in deeper lagoons with slow water circulation. In general, during the Holocene, the highest mean diversity, evenness, and richness of benthic foraminifera were found in the Turneffe Islands and the lowest occurred at Glovers Reef. The foraminiferal faunas of the Lighthouse and Glovers Reefs had been in a "Diversification Stage" since 6,000 yrs, whereas the foraminiferal fauna of the Turneffe Islands reflects the development from a "Colonisation" (~4,000 yrs BP) to a "Diversification Stage" (~2,000 yrs to present time).Lagoonal depth, water circulation, substrate, and BW-temperature have higher influence on foraminiferal diversity as compared to lagoonal size and age. The negative correlation between diversity and lagoonal depth is based on differences in light intensity and substrate. In contrast to Lighthouse Reef, the Turneffe Islands and Glovers Reef show decreasing diversity of benthic foraminifera with increasing lagoon depth, due to finer sediment, turbid waters and/or dense mangrove growth, which reduce the light intensity and the number of species. Water Circulation also affected the benthic foraminifera modes of living and their diversity during the last 6,000 yrs.

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Section: 2)contrasting

confidence: 99%

Section: 2)mentioning

confidence: 85%

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Possible Fossil Echinoid Mass Mortality Detected in Holocene Lagoons, Belize

Gischler

2010

PALAIOS

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“…More recently, Yamano et al (2001) divided lagoonal facies in three western PaciWc atolls based on the presence/absence of benthic foraminifera Calcarina and Heterostegina. Bicchi et al (2002) studied foraminifera in ten French Polynesian atoll lagoons. They identiWed 211 species, and found positive correlations between diversity and lagoon area and between diversity and lagoon aperture.…”

Section: Introductionmentioning

confidence: 99%

Holocene trends in distribution and diversity of benthic foraminifera assemblages in atoll lagoons, Belize, Central America

Schultz

Gischler

Oschmann

2010

Facies

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Seven benthic foraminiferal assemblages were identiWed in vibracores through Holocene lagoons of three Belize atoll lagoons (Glovers Reef, Lighthouse Reef, TurneVe Islands). These include (1) the low-diversity Cribroelphidium assemblage (2) the CribroelphidiumElphidium assemblage (3) the Quinqueloculina-Triloculina-Peneroplis assemblage (4) the high-diversity miliolid assemblage (5) the Archaias-miliolid assemblage (6) the low-diversity miliolid assemblage, and (7) the mixed assemblage. Altogether, 109 species and 56 genera were identiWed. The highest diversities are observed in the largest lagoon (TurneVe Islands), whereas one of the smaller lagoons (Glovers Reef) exhibits the lowest diversities during the Holocene. No signiWcant changes in diversity over time occur, however, a slight trend to higher diversity may be observed through the Holocene, suggesting that the foraminiferal faunas in the atolls are in a diversiWcation stage. Faunal diversity in atoll lagoons appears to be controlled largely by habitat size, habitat heterogeneity, and water circulation. Habitat age and water depth only play minor roles. Substrate texture, water depth, and turbidity inXuence the predominant modes of life of benthic foraminifera encountered in the lagoons (epifaunal versus infaunal versus symbiont-bearing). Time-averaging eVects were not observed, even though lagoonal sedimentation rates Xuctuate in individual cores and the three lagoons, and despite the fact that sediments are modiWed through bioturbation by callianassid shrimps. This Wnding underlines the potential of benthic foraminifera for paleoecological studies in the fossil record of reefs and carbonate platforms.

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“…The Impact Assemblage was dominated by ~40% Quinqueloculina spp., a taxonomic group that does not achieve that level of dominance during the entire Holocene history of Green Bay Cave (van Hengstum & Scott, 2012). Outside of marine cave environments, Quinqueloculina is a diverse and abundant genus in tropical and subtropical carbonate lagoons in Bermuda (Carman, 1933;Javaux & Scott, 2003) and elsewhere (Bicchi et al, 2002). Taphonomically, foraminifera genera with robust tests, such as Quinqueloculina, Pyrgo, or Archaias (a taxon with photosymbionts), have a better preservation potential and thus preferentially become incorporated into the sand deposits of shallow, marine carbonate habitats (Martin & Wright, 1988).…”

Section: Stratigraphic Evidence For the Infilling Of Eve's Pondmentioning

confidence: 99%

Anthropogenic infilling of a Bermudian sinkhole and its impact on sedimentation and benthic foraminifera in the adjacent anchialine cave environment

Cresswell¹,

Hengstum²,

Iliffe³

et al. 2017

IJS

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Abstract:In the mid-20 th century, an inland brackish pond from Bermuda, known as Eve's Pond, was filled with marine sediment from an adjacent coastal lagoon. At this time, an eyewitness reported "…sediment billowing out of the Green Bay Cave for days…", which is a marinedominated anchialine cave located proximal to the former location of Eve's Pond (~200 m). The purpose of this study was to evaluate the potential impact of this infilling event on cave sedimentation and benthic meiofaunal communities, as proxied by the unicellular protists foraminifera that remain preserved in the sediment record. Eight sediment cores were collected from an underwater passage in Green Bay Cave in a transect towards the location where Eve's Pond was surveyed in 1901 CE. The sediment cores were analyzed for visual and density changes (photography, X-radiography), textural variability, benthic foraminifera fauna and diversity, and radiocarbon dating. The recovered sediment cores mostly sampled a late Holocene carbonate mud facies that had been described during previous research in the cave, with benthic foraminiferal assemblages post-dating the onset of seawater circulating between the saline groundwater flooding the cave and the adjacent Harrington Sound ~1,900 years ago. However, two cores located further into the cave (cores 13 and 17) contain a carbonate sand layer with lagoon foraminifera that is anomalous with respect to the Holocene depositional history of the cave and is most likely related to the mid-20 th century infilling of Eve's Pond. Examination of these two cores showed that after the infilling event, the community of benthic foraminifera rapidly reverted to pre-impact assemblages with foraminiferal stygophiles (e.g., Spirophthalmidium emaciatum, Sigmoilina tenuis), which were not displaced by new colonizers introduced into the cave by the dredge spoils. We caution that the results cannot be extrapolated to the pelagic crustacean community, but the results suggest that this physical sedimentary disturbance only minimally impacted the benthic foraminifera community in the cave passages that were sampled.

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Relationship between benthic foraminiferal assemblages and environmental factors in atoll lagoons of the central Tuamotu Archipelago (French Polynesia)

Cited by 35 publications

References 31 publications

Possible Fossil Echinoid Mass Mortality Detected in Holocene Lagoons, Belize

Possible Fossil Echinoid Mass Mortality Detected in Holocene Lagoons, Belize

Holocene trends in distribution and diversity of benthic foraminifera assemblages in atoll lagoons, Belize, Central America

Anthropogenic infilling of a Bermudian sinkhole and its impact on sedimentation and benthic foraminifera in the adjacent anchialine cave environment

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