Adding pieces to the puzzle: insights into diversity and distribution patterns of Cumacea (Crustacea: Peracarida) from the deep North Atlantic to the Arctic Ocean

The Nordic Seas have one of the highest water-mass diversities in the world, yet large knowledge gaps exist in biodiversity structure and biogeographical distribution patterns of the deep macrobenthic fauna. This study focuses on the marine bottom-dwelling peracarid crustacean taxon Cumacea from nor...

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Autores principales:	Carolin Uhlir, Martin Schwentner, Kenneth Meland, Jon Anders Kongsrud, Henrik Glenner, Angelika Brandt, Ralf Thiel, Jörundur Svavarsson, Anne-Nina Lörz, Saskia Brix
Formato:	article
Lenguaje:	EN
Publicado:	PeerJ Inc. 2021
Materias:	Species delimitation Integrative taxonomy IceAGE project 16S rDNA gene Iceland Benthic fauna Medicine R
Acceso en línea:	https://doaj.org/article/4cb186316206459793ac3ed04c967c50
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spelling	oai:doaj.org-article:4cb186316206459793ac3ed04c967c502021-11-13T15:05:12ZAdding pieces to the puzzle: insights into diversity and distribution patterns of Cumacea (Crustacea: Peracarida) from the deep North Atlantic to the Arctic Ocean10.7717/peerj.123792167-8359https://doaj.org/article/4cb186316206459793ac3ed04c967c502021-11-01T00:00:00Zhttps://peerj.com/articles/12379.pdfhttps://peerj.com/articles/12379/https://doaj.org/toc/2167-8359The Nordic Seas have one of the highest water-mass diversities in the world, yet large knowledge gaps exist in biodiversity structure and biogeographical distribution patterns of the deep macrobenthic fauna. This study focuses on the marine bottom-dwelling peracarid crustacean taxon Cumacea from northern waters, using a combined approach of morphological and molecular techniques to present one of the first insights into genetic variability of this taxon. In total, 947 specimens were assigned to 77 morphologically differing species, representing all seven known families from the North Atlantic. A total of 131 specimens were studied genetically (16S rRNA) and divided into 53 putative species by species delimitation methods (GMYC and ABGD). In most cases, morphological and molecular-genetic delimitation was fully congruent, highlighting the overall success and high quality of both approaches. Differences were due to eight instances resulting in either ecologically driven morphological diversification of species or morphologically cryptic species, uncovering hidden diversity. An interspecific genetic distance of at least 8% was observed with a clear barcoding gap for molecular delimitation of cumacean species. Combining these findings with data from public databases and specimens collected during different international expeditions revealed a change in the composition of taxa from a Northern Atlantic-boreal to an Arctic community. The Greenland-Iceland-Scotland-Ridge (GIS-Ridge) acts as a geographical barrier and/or predominate water masses correspond well with cumacean taxa dominance. A closer investigation on species level revealed occurrences across multiple ecoregions or patchy distributions within defined ecoregions.Carolin UhlirMartin SchwentnerKenneth MelandJon Anders KongsrudHenrik GlennerAngelika BrandtRalf ThielJörundur SvavarssonAnne-Nina LörzSaskia BrixPeerJ Inc.articleSpecies delimitationIntegrative taxonomyIceAGE project16S rDNA geneIcelandBenthic faunaMedicineRENPeerJ, Vol 9, p e12379 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Species delimitation Integrative taxonomy IceAGE project 16S rDNA gene Iceland Benthic fauna Medicine R
spellingShingle	Species delimitation Integrative taxonomy IceAGE project 16S rDNA gene Iceland Benthic fauna Medicine R Carolin Uhlir Martin Schwentner Kenneth Meland Jon Anders Kongsrud Henrik Glenner Angelika Brandt Ralf Thiel Jörundur Svavarsson Anne-Nina Lörz Saskia Brix Adding pieces to the puzzle: insights into diversity and distribution patterns of Cumacea (Crustacea: Peracarida) from the deep North Atlantic to the Arctic Ocean
description	The Nordic Seas have one of the highest water-mass diversities in the world, yet large knowledge gaps exist in biodiversity structure and biogeographical distribution patterns of the deep macrobenthic fauna. This study focuses on the marine bottom-dwelling peracarid crustacean taxon Cumacea from northern waters, using a combined approach of morphological and molecular techniques to present one of the first insights into genetic variability of this taxon. In total, 947 specimens were assigned to 77 morphologically differing species, representing all seven known families from the North Atlantic. A total of 131 specimens were studied genetically (16S rRNA) and divided into 53 putative species by species delimitation methods (GMYC and ABGD). In most cases, morphological and molecular-genetic delimitation was fully congruent, highlighting the overall success and high quality of both approaches. Differences were due to eight instances resulting in either ecologically driven morphological diversification of species or morphologically cryptic species, uncovering hidden diversity. An interspecific genetic distance of at least 8% was observed with a clear barcoding gap for molecular delimitation of cumacean species. Combining these findings with data from public databases and specimens collected during different international expeditions revealed a change in the composition of taxa from a Northern Atlantic-boreal to an Arctic community. The Greenland-Iceland-Scotland-Ridge (GIS-Ridge) acts as a geographical barrier and/or predominate water masses correspond well with cumacean taxa dominance. A closer investigation on species level revealed occurrences across multiple ecoregions or patchy distributions within defined ecoregions.
format	article
author	Carolin Uhlir Martin Schwentner Kenneth Meland Jon Anders Kongsrud Henrik Glenner Angelika Brandt Ralf Thiel Jörundur Svavarsson Anne-Nina Lörz Saskia Brix
author_facet	Carolin Uhlir Martin Schwentner Kenneth Meland Jon Anders Kongsrud Henrik Glenner Angelika Brandt Ralf Thiel Jörundur Svavarsson Anne-Nina Lörz Saskia Brix
author_sort	Carolin Uhlir
title	Adding pieces to the puzzle: insights into diversity and distribution patterns of Cumacea (Crustacea: Peracarida) from the deep North Atlantic to the Arctic Ocean
title_short	Adding pieces to the puzzle: insights into diversity and distribution patterns of Cumacea (Crustacea: Peracarida) from the deep North Atlantic to the Arctic Ocean
title_full	Adding pieces to the puzzle: insights into diversity and distribution patterns of Cumacea (Crustacea: Peracarida) from the deep North Atlantic to the Arctic Ocean
title_fullStr	Adding pieces to the puzzle: insights into diversity and distribution patterns of Cumacea (Crustacea: Peracarida) from the deep North Atlantic to the Arctic Ocean
title_full_unstemmed	Adding pieces to the puzzle: insights into diversity and distribution patterns of Cumacea (Crustacea: Peracarida) from the deep North Atlantic to the Arctic Ocean
title_sort	adding pieces to the puzzle: insights into diversity and distribution patterns of cumacea (crustacea: peracarida) from the deep north atlantic to the arctic ocean
publisher	PeerJ Inc.
publishDate	2021
url	https://doaj.org/article/4cb186316206459793ac3ed04c967c50
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Adding pieces to the puzzle: insights into diversity and distribution patterns of Cumacea (Crustacea: Peracarida) from the deep North Atlantic to the Arctic Ocean

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