Preface—biodiversity of Icelandic waters

Meißner, Karin; Brix, Saskia; Halanych, Kenneth M.; Jażdżewska, Anna

doi:10.1007/s12526-018-0884-7

Cited by 7 publications

(6 citation statements)

References 26 publications

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“…Genetics and Ecology) projects leading to a very comprehensive data set that is also suitable for genetic and "omic" studies (Brix et al, 2014;Riehl et al, 2014;Meißner et al, 2018). Morphology-based approaches (interactive identification keys) were used to separate haploniscid genera occurring around Iceland (Antennuloniscus Menzies, 1962, Chauliodoniscus Lincoln, 1985b andHaploniscus) and to identify species within the genus Haploniscus.…”

Section: Introductionmentioning

confidence: 99%

Correct Species Identification and Its Implications for Conservation Using Haploniscidae (Crustacea, Isopoda) in Icelandic Waters as a Proxy

et al. 2022

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Correct identification of species is required to assess and understand the biodiversity of an ecosystem. In the deep sea, however, this is only possible to a limited extent, as a large part of the fauna is undescribed and the identification keys for most taxa are inadequate or missing. With the progressive impact of climate change and anthropogenic activities on deep-sea ecosystems, it is imperative to define reliable methods for robust species identification. In this study, different techniques for the identification of deep-sea species are tested, including a combination of morphological, molecular (DNA barcoding, and proteomic fingerprinting), biogeographical and ecological modeling approaches. These are applied to a family of isopods, the Haploniscidae, from deep waters around Iceland. The construction of interactive identification keys based on the DELTA format (DEscription Language for TAxonomy) were a major pillar of this study, the evaluation of which was underpinned by the application of the supplementary methods. Overall, interactive keys have been very reliable in identifying species within the Haploniscidae. Especially in a deep-sea context, these types of keys could become established because they are easy to adapt and flexible enough to accommodate newly described species. Remarkably, in this study, the interactive key enabled identification of a supposedly new species within the Haploniscidae that was later verified using both molecular genetic – and proteomic methods. However, these keys are limited given that they are based on purely morphological characteristics, including where species with strong ontogenetic or sexual dimorphism occur as both genders are not always described. In this case, integrative taxonomy is the method of choice and the combination presented here has been shown to be very promising for correct identification of deep-sea isopods.

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Section: Introductionmentioning

confidence: 99%

Correct Species Identification and Its Implications for Conservation Using Haploniscidae (Crustacea, Isopoda) in Icelandic Waters as a Proxy

et al. 2022

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“…One problem is the limited availability of large‐scale data sets in terms of individual numbers and geographic scale. The deep‐sea crustacean isopod species Haploniscus bicuspis (Sars, 1877) is an ideal model to study diversity in this environment, as it is one of the few isopod species with circum‐Icelandic distribution and there are large numbers of samples available from the Benthic Invertebrates of Icelandic Waters (BIOICE) and Icelandic marine Animals: Genetics and Ecology (IceAGE) projects (Brix et al, 2014; Meißner et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Recent speciation and hybridization in Icelandic deep‐sea isopods: An integrative approach using genomics and proteomics

et al. 2021

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“…The deep-sea crustacean isopod speciesHaploniscus bicuspis (G. O. Sars, 1877) offers to be an ideal surrogate, as it is one of the few isopod species with circum-Icelandic distribution and large numbers of samples available from the BIOICE (Benthic Invertebrates of Icelandic Waters) and IceAGE (Icelandic marine Animals: Genetics and Ecology) projects (Brix et al, 2014;Meißner, Brix, Halanych, & Jażdżewska, 2018).…”

Section: Introductionmentioning

confidence: 99%

Recent speciation and hybridization in Icelandic deep-sea isopods: an integrative approach using genomics and proteomics

Paulus

Brix

Siebert

et al. 2021

Preprint

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The isopod species Haploniscus bicuspis (G.O. Sars, 1877) shows circum-Icelandic distribution in a wide range of environmental conditions and along well-known geographic barriers, such as the Greenland-Iceland-Faroe (GIF) Ridge. We wanted to explore population genetics, phylogeography and cryptic speciation as well as to investigate whether previously described, but unaccepted subspecies have any merit. Using the same set of specimens, we combined mitochondrial COI sequences, thousands of nuclear loci (ddRAD), and proteomic profiles, plus selected morphological characters using Confocal Laser Scanning Microscopy (CLSM). Five divergent genetic lineages were identified by COI and ddRAD, two south and three north of the GIF Ridge. Assignment of populations to the three northern lineages varied and detailed analyses revealed hybridization and gene flow between them, suggesting a single northern species with a complex phylogeographic history. No apparent hybridization was observed among lineages south of the Ridge, inferring the existence of two more species. Differences in proteomic profiles between the three putative species were minimal, implying an ongoing or recent speciation process. Population differentiation was high, even among closely associated populations, and higher in mitochondrial COI than nuclear ddRAD loci. Gene flow is apparently male-biased, leading to hybrid zones and instances of complete exchange of the local nuclear genome through immigrating males. This study did not confirm the existence of subspecies defined by male characters, which probably characterize different male developmental stages present in all species.

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Preface—biodiversity of Icelandic waters

Cited by 7 publications

References 26 publications

Correct Species Identification and Its Implications for Conservation Using Haploniscidae (Crustacea, Isopoda) in Icelandic Waters as a Proxy

Correct Species Identification and Its Implications for Conservation Using Haploniscidae (Crustacea, Isopoda) in Icelandic Waters as a Proxy

Recent speciation and hybridization in Icelandic deep‐sea isopods: An integrative approach using genomics and proteomics

Recent speciation and hybridization in Icelandic deep-sea isopods: an integrative approach using genomics and proteomics

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