Taphonomy of salt marsh foraminifera: an example from coastal Georgia

Goldstein, Susan T.; Watkins, G. Todd

doi:10.1016/s0031-0182(98)00195-3

Cited by 95 publications

(52 citation statements)

References 28 publications

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“…They also described "half tests" of M. fusca, Arenoparrella mexicana and Trochammina spp. and attributed this to metazoan predation, possibly by fiddler crabs (Goldstein and Watkins, 1999). Similar half-tests were observed in by Culver and Horton (2005) in North Carolina marsh material, and fiddler crabs are abundant in this region.…”

Section: Discussionsupporting

confidence: 71%

Patterns in cumulative increase in live and dead species from foraminiferal time series of Cowpen Marsh, Tees Estuary, UK: Implications for sea-level studies

Horton

Murray

2006

Marine Micropaleontology

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We have collected live and dead foraminiferal times-series data at 2-weekly intervals for a 12-month period from the intertidal zone of Cowpen Marsh, Tees Estuary, UK. The data from the 689 samples show profound differences between live and dead assemblages, although assemblages are dominated by just three species, Haynesina germanica, Jadammina macrescens and Trochammina inflata, which represent over 70% of the assemblage. The cumulative increase in species of most environments approximates to a lognormal or log series. None of the datasets show a broken stick pattern. The cumulative maximum number of species, which represents the species carrying capacity of the environment, is recorded earlier in the life assemblages than the dead counterparts. The dead assemblage of Cowpen Marsh is found to have a higher abundance (435 compared to 163 individuals/10 cm 3 ) and number of species (52 compared to 28) than its live counterpart because the dead assemblage represents many generations added over a long period of time. In contrast, some species are recorded in the live dataset that were not found in the dead assemblage, indicating the dead record is either incomplete (e.g. taphonomic change) or inadequately sampled.We investigated the influence of patterns in cumulative increase on dead assemblages for sea-level reconstructions through the development of foraminiferal-based transfer functions. The cumulative transfer functions suggest that the performance improves during the first six sample intervals of the time-series dataset with reconstruction differing by 1.2 m and remains constant thereafter. AbstractWe have collected live and dead foraminiferal times-series data at two-weekly intervals for a twelve-month period from the intertidal zone of Cowpen Marsh, Tees Estuary, UK. The data from the 689 samples show profound differences between live and dead assemblages, although assemblages are dominated by just three species, Haynesina germanica, Jadammina macrescens and Trochammina inflata, which represent over 70% of the assemblage. The cumulative increase in species of most environments approximates to a log normal or log series. None of the datasets show a broken stick pattern. The cumulative maximum number of species, which represents the species carrying capacity of the environment, is recorded earlier in the life assemblages than the dead counterparts. The dead assemblage of Cowpen Marsh is found to have a higher abundance (435 compared to 163 individuals/10cm 3 ) and number of species (52 compared to 28) than its live counterpart because the dead assemblage represents many generations added over a long period of time. In contrast, some species are recorded in the live dataset that were not found in the dead assemblage, indicating the dead record is either incomplete (e.g. taphonomic change) or inadequately sampled.We investigated the influence of patterns in cumulative increase on dead assemblages for sealevel reconstructions through the development of foraminiferal-based transfer functions. The cumul...

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Section: Discussionsupporting

confidence: 71%

Patterns in cumulative increase in live and dead species from foraminiferal time series of Cowpen Marsh, Tees Estuary, UK: Implications for sea-level studies

Horton

Murray

2006

Marine Micropaleontology

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“…A fossil sample may be without a modern analogue when it is deposited in an environment not represented in the surface training set, if it contains a significant infaunal signal, or if the assemblage has been modified by postmortem processes such as erosion and transport of tests, or destruction by abrasion and dissolution (Murray, 1991). Whilst living infaunal foraminifera have been reported from the organic salt-marshes of North America (Goldstein et al, 1995;Ozarko et al,1997;Saffert and Thomas, 1998;Goldstein and Watkins, 1999), they do not appear to be significant in the predominantly minerogenic marshes of the UK (Horton, 1997). An inspection of Table 2 and Fig.…”

Section: Application To the Fossil Corementioning

confidence: 99%

Reconstructing relative sea-level change using UK salt-marsh foraminifera

2000

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“…Post-depositional modification of assemblages may also compromise paleoenvironmental reconstructions through selective removal of tests (e.g. Jonasson and Patterson, 1992;Goldstein and Watkins, 1999).…”

Section: Introductionmentioning

confidence: 99%