UK intertidal foraminiferal distributions: implications for sea-level studies

Horton, Benjamin P.; Edwards, Robin; Lloyd, Jeremy M.

doi:10.1016/s0377-8398(99)00003-1

Cited by 134 publications

(60 citation statements)

References 22 publications

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“…These transfer functions are statistical methods capable of taking ecological information contained within modern distributions of salt-marsh foraminifera, and using this to obtain palaeo-ecological data from fossil assemblages. For the purposes of sea-level investigation, the aim of the Horton et al (1999b) transfer function is to reconstruct variations in tide levels from fossil foraminiferal assemblages.…”

Section: Research Approachmentioning

confidence: 99%

“…Whilst a study conducted in the USA has illustrated that variations in salinity can complicate the simple vertical subdivision of foraminiferal assemblages (De Rijk, 1995;De Rijk and Troelstra, 1997), evidence from a number of salt-marshes in the UK indicates that tide level information can still be extracted from them (Horton 1997;Horton et al, 1999a). These UK data have been compiled to develop a foraminiferal transfer function that can be used to reconstruct past tide levels from fossil foraminiferal assemblages (Horton, 1997;Horton et al, 1999b), and a similar approach has also been applied in the marshes of North America (Gehrels, 1999). Biostratigraphic indicators such as foraminifera respond more rapidly to sea-level change than their lithostratigraphic counterparts (Long, 1992;Allen, 1995;Reed, 1995), and the transfer function can be used to refine the indicative meaning of classic SLIs constructed from lithostratigraphic transgressive and regressive contacts (Horton et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

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

2000

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Section: Research Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2000

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“…Scott, 1976;Scott andMedioli, 1978, 1980a, b;Scott and Leckie, 1980;Patterson, 1990;Gehrels, 1994;Guilbault et al, 1996;Goldstein and Watkins, 1998;Hayward et al, 1999Hayward et al, , 2004Horton, 1999;Horton et al, 1999aHorton et al, , b, 2003Horton et al, , 2005Edwards and Horton, 2000;Hippensteel et al, 2000Hippensteel et al, , 2002Gehrels et al, 2001, Horton and Edwards, 2003Martin et al, 2003;Edwards et al, 2004a;Gehrels and Newman, 2004;Patterson et al, 2004;Culver and Horton, 2005;Tobin et al, 2005;Horton and Culver, in press). In terms of foraminiferal distributions within the intertidal zone, there is a clear distinction between an agglutinated assemblage that is restricted to the vegetated marsh and a calcareous assemblage that dominates the mudflats and sandflats of the intertidal zone.…”

Section: Introductionmentioning

confidence: 99%

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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“…For instance, gradients in environmental factors such as water depth [37][38][39], substrate consistency [38,40] and salinity [41] are known to correlate with the distribution of marine taxa, thereby influencing recovery potential. Sequence stratigraphic principles have also informed our understanding of the distribution of fossils, such as the size of gaps [42] and the clustering of first and last occurrences around sequence boundaries [42][43][44][45].…”

Section: Third-generation Methodsmentioning

confidence: 99%

Estimating times of extinction in the fossil record

Wang

Marshall

2016

Biol. Lett.

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Because the fossil record is incomplete, the last fossil of a taxon is a biased estimate of its true time of extinction. Numerous methods have been developed in the palaeontology literature for estimating the true time of extinction using ages of fossil specimens. These methods, which typically give a confidence interval for estimating the true time of extinction, differ in the assumptions they make and the nature and amount of data they require. We review the literature on such methods and make some recommendations for future directions.

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UK intertidal foraminiferal distributions: implications for sea-level studies

Cited by 134 publications

References 22 publications

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

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

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

Estimating times of extinction in the fossil record

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