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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Adding pieces to the puzzle : Insights into diversity and distribution patterns of Cumacea (Crustacea: Peracarida) from the deep North Atlantic to the Arctic Ocean. / Uhlir, Carolin; Schwentner, Martin; Meland, Kenneth; Kongsrud, Jon Anders; Glenner, Henrik; Brandt, Angelika; Thiel, Ralf; Svavarsson, Jörundur; Lörz, Anne Nina; Brix, Saskia.
In: PeerJ, Vol. 9, e12379, 2021.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Adding pieces to the puzzle
T2 - Insights into diversity and distribution patterns of Cumacea (Crustacea: Peracarida) from the deep North Atlantic to the Arctic Ocean
AU - Uhlir, Carolin
AU - Schwentner, Martin
AU - Meland, Kenneth
AU - Kongsrud, Jon Anders
AU - Glenner, Henrik
AU - Brandt, Angelika
AU - Thiel, Ralf
AU - Svavarsson, Jörundur
AU - Lörz, Anne Nina
AU - Brix, Saskia
N1 - Publisher Copyright: Copyright 2021 Uhlir et al.
PY - 2021
Y1 - 2021
N2 - 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.
AB - 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.
KW - 16S rDNA gene
KW - Benthic fauna
KW - Biogeography
KW - Deep sea
KW - IceAGE project
KW - Iceland
KW - Integrative taxonomy
KW - Species delimitation
U2 - 10.7717/peerj.12379
DO - 10.7717/peerj.12379
M3 - Journal article
C2 - 34824910
AN - SCOPUS:85119323036
VL - 9
JO - PeerJ
JF - PeerJ
SN - 2167-8359
M1 - e12379
ER -
ID: 286312074