Morphology and composition of the internal axis in two morphologically contrasting deep-water sea pens (Cnidaria: Octocorallia)
Umbellula encrinus Linnaeus, 1758 and Anthoptilum grandiflorum (Verrill, 1879) are two species of deep-water sea pens (Cnidaria: Octocorallia) commonly found in the Northwest Atlantic. These sea pens are frequently caught as fishing bycatch, but little is known about their biology. Here we character...
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ftdatacite:10.6084/m9.figshare.6010706 2023-05-15T17:45:46+02:00 Morphology and composition of the internal axis in two morphologically contrasting deep-water sea pens (Cnidaria: Octocorallia) Neves, Bárbara De Moura Edinger, Evan Hayes, Vonda Wareham 2018 https://dx.doi.org/10.6084/m9.figshare.6010706 https://tandf.figshare.com/articles/Morphology_and_composition_of_the_internal_axis_in_two_morphologically_contrasting_deep-water_sea_pens_Cnidaria_Octocorallia_/6010706 unknown Taylor & Francis https://dx.doi.org/10.1080/00222933.2018.1445787 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Marine Biology Inorganic Chemistry FOS Chemical sciences dataset Dataset 2018 ftdatacite https://doi.org/10.6084/m9.figshare.6010706 https://doi.org/10.1080/00222933.2018.1445787 2021-11-05T12:55:41Z Umbellula encrinus Linnaeus, 1758 and Anthoptilum grandiflorum (Verrill, 1879) are two species of deep-water sea pens (Cnidaria: Octocorallia) commonly found in the Northwest Atlantic. These sea pens are frequently caught as fishing bycatch, but little is known about their biology. Here we characterise the internal skeleton (axis) of these two morphologically contrasting species, in terms of axis carbonate composition and proportion, morphology and metrics (i.e. cross-sectional area and weight) through gradients along their lengths. Using the conspicuous growth rings present in the axis of U. encrinus we also estimated intra-colonial variation in radial growth rates for this species. X-ray diffraction (XRD) analyses revealed that the carbonate portion of the axis is composed of magnesian calcite (Ca, Mg)CO 3 in both species. On average, the axis is composed of 71% carbonate material in U. encrinus , and 65% carbonate in A. grandiflorum . The carbonate proportion was greatly reduced from base (71%) to tip (33%) in the axis of U. encrinus , while in A. grandiflorum changes were less abrupt (~6% difference from base to tip). In U. encrinus , the axis is quadrangular in shape through its whole length, twisting longitudinally. Twisting can occur in both clockwise and anti-clockwise directions. The axis of A. grandiflorum varied from elliptical near the base to cylindrical through most of the remaining length, with no twisting observed. Axes’ cross-sectional areas also decreased with distance from the base in both species, being the largest near the base. Estimated radial growth rates in U. encrinus were variable within a single colony, ranging between 0.04 and 0.08 mm.yr −1 . This is the first study to describe changes along the axes of sea pens, and to characterise the axes in the studied species. It provides a baseline for studies considering sea pens’ skeletons (e.g. ocean acidification and palaeoceanography). Dataset Northwest Atlantic Ocean acidification DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Marine Biology Inorganic Chemistry FOS Chemical sciences |
spellingShingle |
Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Marine Biology Inorganic Chemistry FOS Chemical sciences Neves, Bárbara De Moura Edinger, Evan Hayes, Vonda Wareham Morphology and composition of the internal axis in two morphologically contrasting deep-water sea pens (Cnidaria: Octocorallia) |
topic_facet |
Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Marine Biology Inorganic Chemistry FOS Chemical sciences |
description |
Umbellula encrinus Linnaeus, 1758 and Anthoptilum grandiflorum (Verrill, 1879) are two species of deep-water sea pens (Cnidaria: Octocorallia) commonly found in the Northwest Atlantic. These sea pens are frequently caught as fishing bycatch, but little is known about their biology. Here we characterise the internal skeleton (axis) of these two morphologically contrasting species, in terms of axis carbonate composition and proportion, morphology and metrics (i.e. cross-sectional area and weight) through gradients along their lengths. Using the conspicuous growth rings present in the axis of U. encrinus we also estimated intra-colonial variation in radial growth rates for this species. X-ray diffraction (XRD) analyses revealed that the carbonate portion of the axis is composed of magnesian calcite (Ca, Mg)CO 3 in both species. On average, the axis is composed of 71% carbonate material in U. encrinus , and 65% carbonate in A. grandiflorum . The carbonate proportion was greatly reduced from base (71%) to tip (33%) in the axis of U. encrinus , while in A. grandiflorum changes were less abrupt (~6% difference from base to tip). In U. encrinus , the axis is quadrangular in shape through its whole length, twisting longitudinally. Twisting can occur in both clockwise and anti-clockwise directions. The axis of A. grandiflorum varied from elliptical near the base to cylindrical through most of the remaining length, with no twisting observed. Axes’ cross-sectional areas also decreased with distance from the base in both species, being the largest near the base. Estimated radial growth rates in U. encrinus were variable within a single colony, ranging between 0.04 and 0.08 mm.yr −1 . This is the first study to describe changes along the axes of sea pens, and to characterise the axes in the studied species. It provides a baseline for studies considering sea pens’ skeletons (e.g. ocean acidification and palaeoceanography). |
format |
Dataset |
author |
Neves, Bárbara De Moura Edinger, Evan Hayes, Vonda Wareham |
author_facet |
Neves, Bárbara De Moura Edinger, Evan Hayes, Vonda Wareham |
author_sort |
Neves, Bárbara De Moura |
title |
Morphology and composition of the internal axis in two morphologically contrasting deep-water sea pens (Cnidaria: Octocorallia) |
title_short |
Morphology and composition of the internal axis in two morphologically contrasting deep-water sea pens (Cnidaria: Octocorallia) |
title_full |
Morphology and composition of the internal axis in two morphologically contrasting deep-water sea pens (Cnidaria: Octocorallia) |
title_fullStr |
Morphology and composition of the internal axis in two morphologically contrasting deep-water sea pens (Cnidaria: Octocorallia) |
title_full_unstemmed |
Morphology and composition of the internal axis in two morphologically contrasting deep-water sea pens (Cnidaria: Octocorallia) |
title_sort |
morphology and composition of the internal axis in two morphologically contrasting deep-water sea pens (cnidaria: octocorallia) |
publisher |
Taylor & Francis |
publishDate |
2018 |
url |
https://dx.doi.org/10.6084/m9.figshare.6010706 https://tandf.figshare.com/articles/Morphology_and_composition_of_the_internal_axis_in_two_morphologically_contrasting_deep-water_sea_pens_Cnidaria_Octocorallia_/6010706 |
genre |
Northwest Atlantic Ocean acidification |
genre_facet |
Northwest Atlantic Ocean acidification |
op_relation |
https://dx.doi.org/10.1080/00222933.2018.1445787 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.6010706 https://doi.org/10.1080/00222933.2018.1445787 |
_version_ |
1766149027828596736 |