New observations on the Antarctic Asteromphalus darwinii/ hookeri diatom species-complex (Asterolampraceae)
Antarctic diatom populations of Asteromphalus hookeri and related species such as A. hyalinus and A. parvulus exhibit a highly variable number of hyaline rays ranging from 3 broad + 1 narrow (3 + 1) in the smallest valves, with 4 + 1 (27%) and 5 + 1 rays (35%) most common, and 6 + 1, 7 + 1, and rare...
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ftarchimer:oai:archimer.ifremer.fr:91140 2023-12-24T10:11:18+01:00 New observations on the Antarctic Asteromphalus darwinii/ hookeri diatom species-complex (Asterolampraceae) Hallegraeff, Gustaaf Leblanc, Karine 2023-08 application/pdf https://archimer.ifremer.fr/doc/00799/91140/96822.pdf https://archimer.ifremer.fr/doc/00799/91140/103848.pdf https://doi.org/10.1007/s00300-023-03160-6 https://archimer.ifremer.fr/doc/00799/91140/ eng eng Springer https://archimer.ifremer.fr/doc/00799/91140/96822.pdf https://archimer.ifremer.fr/doc/00799/91140/103848.pdf doi:10.1007/s00300-023-03160-6 https://archimer.ifremer.fr/doc/00799/91140/ info:eu-repo/semantics/openAccess restricted use Polar Biology (0722-4060) (Springer), 2023-08 , Vol. 46 , N. 8 , P. 759-772 Antarctic diatoms Asteromphalus hookeri Asteromphalus darwinii text Article info:eu-repo/semantics/article 2023 ftarchimer https://doi.org/10.1007/s00300-023-03160-6 2023-11-28T23:51:10Z Antarctic diatom populations of Asteromphalus hookeri and related species such as A. hyalinus and A. parvulus exhibit a highly variable number of hyaline rays ranging from 3 broad + 1 narrow (3 + 1) in the smallest valves, with 4 + 1 (27%) and 5 + 1 rays (35%) most common, and 6 + 1, 7 + 1, and rarely 8 + 1 rays only in larger cells. During December 1959 to April 1960 in the southern sector of the Atlantic Ocean, 6% of valves occurred as “double forms” with epitheca and hypotheca of the same cell exhibiting 4 + 1/3 + 1, 5 + 1/4 + 1, 6 + 1/5 + 1 and 7 + 1/6 + 1 ray combinations. Smaller cells (3 + 1, 4 + 1) always exhibited jagged separating lines in the central area, but larger cells (7 + 1, 8 + 1) had mostly smooth lines, and either jagged or smooth separating lines occurred in intermediate 5 + 1 and 6 + 1 forms, respectively. Epitheca and hypotheca of one and the same cell always exhibited jagged or smooth separating lines, but never mixtures. Observations of silica deposition during October to November 2011 around the Kerguelen Island plateau using the PDMPO fluorescent marker suggest that Asteromphalus separating lines play a key role in silica cell wall development. We discuss implications for taxonomy of what we designate as two highly variable and often confused and overlapping cold-water diatom taxa, A. darwinii (jagged separating lines; synonyms A. beaumontii, A. hyalinus, A. leboimei, A. parvulus, A. rossii) and A. hookeri (smooth separating lines; synonyms A. antarcticus, A. buchii). Article in Journal/Newspaper Antarc* Antarctic antarcticus Polar Biology Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic The Antarctic Kerguelen Kerguelen Island ENVELOPE(69.500,69.500,-49.250,-49.250) Jagged ENVELOPE(-65.683,-65.683,-65.967,-65.967) Polar Biology 46 8 759 772 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Antarctic diatoms Asteromphalus hookeri Asteromphalus darwinii |
spellingShingle |
Antarctic diatoms Asteromphalus hookeri Asteromphalus darwinii Hallegraeff, Gustaaf Leblanc, Karine New observations on the Antarctic Asteromphalus darwinii/ hookeri diatom species-complex (Asterolampraceae) |
topic_facet |
Antarctic diatoms Asteromphalus hookeri Asteromphalus darwinii |
description |
Antarctic diatom populations of Asteromphalus hookeri and related species such as A. hyalinus and A. parvulus exhibit a highly variable number of hyaline rays ranging from 3 broad + 1 narrow (3 + 1) in the smallest valves, with 4 + 1 (27%) and 5 + 1 rays (35%) most common, and 6 + 1, 7 + 1, and rarely 8 + 1 rays only in larger cells. During December 1959 to April 1960 in the southern sector of the Atlantic Ocean, 6% of valves occurred as “double forms” with epitheca and hypotheca of the same cell exhibiting 4 + 1/3 + 1, 5 + 1/4 + 1, 6 + 1/5 + 1 and 7 + 1/6 + 1 ray combinations. Smaller cells (3 + 1, 4 + 1) always exhibited jagged separating lines in the central area, but larger cells (7 + 1, 8 + 1) had mostly smooth lines, and either jagged or smooth separating lines occurred in intermediate 5 + 1 and 6 + 1 forms, respectively. Epitheca and hypotheca of one and the same cell always exhibited jagged or smooth separating lines, but never mixtures. Observations of silica deposition during October to November 2011 around the Kerguelen Island plateau using the PDMPO fluorescent marker suggest that Asteromphalus separating lines play a key role in silica cell wall development. We discuss implications for taxonomy of what we designate as two highly variable and often confused and overlapping cold-water diatom taxa, A. darwinii (jagged separating lines; synonyms A. beaumontii, A. hyalinus, A. leboimei, A. parvulus, A. rossii) and A. hookeri (smooth separating lines; synonyms A. antarcticus, A. buchii). |
format |
Article in Journal/Newspaper |
author |
Hallegraeff, Gustaaf Leblanc, Karine |
author_facet |
Hallegraeff, Gustaaf Leblanc, Karine |
author_sort |
Hallegraeff, Gustaaf |
title |
New observations on the Antarctic Asteromphalus darwinii/ hookeri diatom species-complex (Asterolampraceae) |
title_short |
New observations on the Antarctic Asteromphalus darwinii/ hookeri diatom species-complex (Asterolampraceae) |
title_full |
New observations on the Antarctic Asteromphalus darwinii/ hookeri diatom species-complex (Asterolampraceae) |
title_fullStr |
New observations on the Antarctic Asteromphalus darwinii/ hookeri diatom species-complex (Asterolampraceae) |
title_full_unstemmed |
New observations on the Antarctic Asteromphalus darwinii/ hookeri diatom species-complex (Asterolampraceae) |
title_sort |
new observations on the antarctic asteromphalus darwinii/ hookeri diatom species-complex (asterolampraceae) |
publisher |
Springer |
publishDate |
2023 |
url |
https://archimer.ifremer.fr/doc/00799/91140/96822.pdf https://archimer.ifremer.fr/doc/00799/91140/103848.pdf https://doi.org/10.1007/s00300-023-03160-6 https://archimer.ifremer.fr/doc/00799/91140/ |
long_lat |
ENVELOPE(69.500,69.500,-49.250,-49.250) ENVELOPE(-65.683,-65.683,-65.967,-65.967) |
geographic |
Antarctic The Antarctic Kerguelen Kerguelen Island Jagged |
geographic_facet |
Antarctic The Antarctic Kerguelen Kerguelen Island Jagged |
genre |
Antarc* Antarctic antarcticus Polar Biology |
genre_facet |
Antarc* Antarctic antarcticus Polar Biology |
op_source |
Polar Biology (0722-4060) (Springer), 2023-08 , Vol. 46 , N. 8 , P. 759-772 |
op_relation |
https://archimer.ifremer.fr/doc/00799/91140/96822.pdf https://archimer.ifremer.fr/doc/00799/91140/103848.pdf doi:10.1007/s00300-023-03160-6 https://archimer.ifremer.fr/doc/00799/91140/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1007/s00300-023-03160-6 |
container_title |
Polar Biology |
container_volume |
46 |
container_issue |
8 |
container_start_page |
759 |
op_container_end_page |
772 |
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1786163002815283200 |