Guilds among epiphytal foraminifera on fibrous substrates, Nevis, West Indies

Wilson, Brent

doi:10.1016/j.marmicro.2006.10.001

Cited by 21 publications

(19 citation statements)

References 34 publications

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“…Nuttallides umbonifera was a major component responsible for the changes across both AB boundaries, being the species that increased most markedly in percentage abundance across the AB I-II boundary and the one that decreased most markedly across the AB II-III boundary. Siphonodosaria nuttalli aculeata, Stilostomella subspinosa, and Brizalina plicatella increased and decreased in a similar manner to N. umbonifera, suggesting that these four species may have belonged to the same taxonomic guild, a foraminiferal guild being an association that competes for the same resources but interacts little with member of other guilds (Wilson, 2006c). It is intriguing that changes in the per-sample percentage abundance of N. umbonifera did not coincide precisely with the AB boundaries but were offset by one sample.…”

Section: Cipero Formationmentioning

confidence: 98%

Using SHEBI (SHE Analysis For Biozone Identification): To Proceed From The Top Down Or The Bottom Up? A Discussion Using Two Miocene Foraminiferal Successions From Trinidad, West Indies

Wilson

2008

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SHE analysis for biozone identification (SHEBI) is a new technique that identifies abundance biozones (ABs) by accumulating species abundance data along a time series, recalculating species richness (S), the information function (H), and the equitability index (E) with the addition of each sample. Boundaries are drawn between ABs where SHE analysis detects a change in either (1) the population structure or (2) the assemblage's species composition, species having joined or left the community in quantities that affect the evenness of the distribution of species abundances. This study uses foraminiferal data from two Miocene sections on Trinidad (Cipero Formation, Catapsydrax stainforthi Zone; San José Calcareous Silt, Globorotalia acostaensis Zone) to test if top-downward or bottom-upward analyses indicate the same AB boundaries. The results differ. In the Cipero there are no matches between AB boundaries determined by bottomup and top-down SHEBIs. In the San José CalcareousSilt, only some boundaries match. It is recommended that SHEBI proceed in the order in which the samples in the ABs were deposited, treating the ABs as successive ecostratigraphic units. Intriguingly, no matter whether ABs were determined by bottom-up and top-down SHEBIs, SHE community structure investigations indicated logarithmic series population structures. A graphical technique for determining the species responsible for the change in ABs reveals that a peak in the per sample percentage abundance of Nuttallides umbonifera in the Cipero Formation is offset by one sample from the AB boundaries it engendered, marking a temporary decrease in nutrient flux.

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Section: Cipero Formationmentioning

confidence: 98%

Using SHEBI (SHE Analysis For Biozone Identification): To Proceed From The Top Down Or The Bottom Up? A Discussion Using Two Miocene Foraminiferal Successions From Trinidad, West Indies

Wilson

2008

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“…It occurs primarily in lagoon and shelf environments but it is also recorded from the continental slope in the Gulf of Mexico. Although most records are from sediment samples it is also found to be epiphytal in low abundance on various calcareous algae on nevis (Wilson, 2007;Wilson & Ramsook, 2007). The areas of high abundance are: San Francisco Bay, California, USA (Lesen, 2005), nW Gulf of Mexico (Phleger, 1951;1956) and Puerto Rico (Seiglie, 1974).…”

Section: Fursenkoina Earlandi It Looks Like a Bolivinid Rather Thanmentioning

confidence: 99%

Living benthic foraminifera: biogeographical distributions and the significance of rare morphospecies

Murray

2013

J. Micropalaeontol.

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Abstract. Previous studies have investigated regional distribution but this is the first attempt to investigate the global biogeographical distribution of individual morphospecies of living/stained smaller benthic foraminifera. From 8032 samples collected between 1952 and 2011 data have been gathered on the relative abundance of >120 species in five major environments ranging from marsh to deep sea. There is a spectrum of six groups of species with abundance ranging from very high (Group 1) to extremely low (Group 6). In the latter species abundance never reaches 10% of an assemblage and, in many cases, it is only 1–2%. Individual species are shown to occupy a range of environments with very few being confined to a single environment (usually either marsh or deep sea). Some species occur in several oceans while others are confined to just one. There is no correlation between species abundance and being either widely or narrowly distributed. Propagules are the most likely mechanism of dispersal but some narrowly distributed species may not produce them. Generalists may be widely or narrowly distributed but opportunists are likely to be widely distributed. The rare species of Group 6 contribute to high diversity in shelf and deep-sea assemblages. These species may be adapted to minor differences in microhabitats induced by disturbance and patchy food supply. Patterns of biogeography have application to ecology, palaeoecology and taxonomy.

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“…However, there is no significant correlation between G. subglobosa and A. gibbosa. This might reflect the presence of several species guilds in the SWA (Wilson, 2006b) -a guild being a functional cluster of species that interact among themselves more strongly than with other species in the assemblage (see Jaksic, 1981;Jaksic & Medel, 1990). Particular shallow-water species guilds suggested by these data comprise A.…”

Section: Interactions Between Shallow-and Deep-water Environmentsmentioning

confidence: 88%

Late Quaternary benthonic foraminifera in a bathyal core from the Leeward Islands, Lesser Antilles, NE Caribbean Sea

Wilson

2008

J. Micropalaeontol.

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The 3.13 m long bathyal piston core En20-2 from the northern Leeward Islands (17(49.9#N, 63(02.4#W, water depth 680 m) was sampled every 20 cm. The Pleistocene-Holocene boundary occurred at 107 cm, and the base of the core lay above the Atlantic extinction of Pulleniatina obliquiloculata (34 ka BP). The core yielded throughout both (a) a deep-water association (DWA) of middle bathyal benthonic foraminifera and (b) a shallow-water association (SWA; up to 56% of total recovery) comprising back-reef, epiphytal species. The environmental trends suggested by the two groups are compared.Although sea-levels during the Late Pleistocene and Early Holocene rose abruptly, there was no abrupt change in the DWA at the Pleistocene-Holocene boundary, but a gradual change from a higherproductivity fauna (Bulimina spp., Uvigerina spp.) at the base of the core to a lower-productivity fauna (Cassidulina spp., Globocassidulina spp.) at the top. Microhabitat preference changed from shallowinfaunal at the core base to primarily epifaunal at the top. Diversity and species dominance did not differ significantly between the Late Pleistocene and the Holocene.Percentage abundances of species were calculated separately for the DWA and SWA. Seventy significant correlations were found between the percentage abundances of individual DWA and SWA species, the two strongest correlations -both positive -being between (a) Neoconorbina terquemi and Uvigerina laevis, and (b) Amphistegina gibbosa and Cassidulina curvata. The percentage abundance of U. laevis decreased up-section, whereas the percentage abundance of A. gibbosa increased up-section, reflecting a change in the nutrient flux over time that impacted on both the DWA and the SWA. Positive correlations between the DWA low-productivity indicator Globocassidulina subglobosa and the SWA species Asterigerina carinata, Elphidium discoidale, Peneroplis bradyi and P. proteus suggests that these four SWA species comprise a guild.

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Guilds among epiphytal foraminifera on fibrous substrates, Nevis, West Indies

Cited by 21 publications

References 34 publications

Using SHEBI (SHE Analysis For Biozone Identification): To Proceed From The Top Down Or The Bottom Up? A Discussion Using Two Miocene Foraminiferal Successions From Trinidad, West Indies

Using SHEBI (SHE Analysis For Biozone Identification): To Proceed From The Top Down Or The Bottom Up? A Discussion Using Two Miocene Foraminiferal Successions From Trinidad, West Indies

Living benthic foraminifera: biogeographical distributions and the significance of rare morphospecies

Late Quaternary benthonic foraminifera in a bathyal core from the Leeward Islands, Lesser Antilles, NE Caribbean Sea

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