Deep down: Isopod biodiversity of the Kuril–Kamchatka abyssal area including a comparison with data of previous expeditions of the RV Vityaz

Elsner, Nikolaus O.; Malyutina, Marina V.; Golovan, Olga A.; Brenke, Nils; Riehl, Torben; Brandt, Angelika

doi:10.1016/j.dsr2.2014.08.007

Cited by 29 publications

(12 citation statements)

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“…Accordingly, in the list by Brix et al, (2018), Munnopsidae were clearly less diversified than the rest of Families without paddle-shape legs. This tendency also happens in abyssal asellote fauna from the NW Pacific (Elsner et al, 2015), with 62.8% epibenthic species and only 37.2% species (Munnopsidae) with natatory legs (from 215 asellotes counted, see Table 2 in Elsner et al, 2015). In addition, epibenthic asellotes in the Mediterranean are linked primarily to mainland areas, where %OM and, in general, food sources for benthos in sediments is higher.…”

Section: Preferent Habitats Occupied By Isopodsmentioning

confidence: 79%

“…Numerous exploratory studies on isopods (by extension to macrofauna) have been carried out in the last decades in the North Atlantic (Harrison, 1988;Svavarsson et al, 1990;Brandt et al, 2005;Brix and Svavarsson, 2010;Schnurr et al, 2014;Brökeland, and Svavarsson, 2017), South Atlantic (Brix et al, 2018a) and other oceanic regions (e.g. N Pacific: Brandt et al, 2013;Elsner et al, 2015) with a large list of species reported (Brandt et al, 2009;Elsner et al, 2015). Deep-sea isopods are dominated by species of the suborder Asellota, whose taxonomic classification is extremely difficult (Wilson, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Most published research in the last decades related to the Asellota are primarily taxonomic and include new and revised species descriptions and lists of species reported from new localities that are pending species determination (e.g. in Kurile-Kamchatka: Elsner et al, 2015). Such gaps in taxonomic determination are not only from remote, newly explored areas.…”

Section: Introductionmentioning

confidence: 99%

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Deep sea isopods from the western Mediterranean: Distribution and habitat

Cartes

Figueroa

2020

Progress in Oceanography

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Isopods are a highly diversified group of deep-sea fauna, with a wide variety of shapes which must reflect a similar great variety of adaptations to the deep environments. The deep Mediterranean, however, has a low diversity of isopods related to its oligotrophy, the thermal stability of deep-water masses (~12.8 °C below 150 ˗ 200 m) and rather homogeneous geomorphology. The main factor defining isopod habitats in the Balearic Basin is insularity vs mainland influence. Desmosomatidae and Ischnomesidae, examples of epibenthic species (with lack of paddle-shaped legs and non/low-natatory capacity) are mainly linked to mainland areas with higher % organic matter (OM) and labile C, indicating food availability. By contrast, suprabenthic species like Munnopsidae (with some paddle-shaped, natatory, legs) are more dominant in insular areas. Compared with the Atlantic, the degree of impoverishment in diversity (number of species, S) of deep-Mediterranean asellotes is higher among epibenthos (with a lot of families/genera absent in the deep Mediterranean) than for suprabenthic species, with potential natatory capacity (natatory legs). This suggests that the high diversity of deep sea asellotes may depend on the trophic niches (sediment richness and diversity of habitats) available. In the 20 yrs period (1991-2011) of our (non-continuous) sampling series we identified some climatic influence (higher ENSO index) on the high densities reported in 1991-1992 samples, related to species taken at submarine canyons in mainland areas. Higher food availability (by advection) in canyons during 1991 and 1992 related with an increase of rainfall regime may enhance recruitment (e.g. in March 1992 inside canyons) and abundance/diversity of asellotes, especially for epibenthic species (Desmosomatidae).

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Section: Preferent Habitats Occupied By Isopodsmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Deep sea isopods from the western Mediterranean: Distribution and habitat

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Figueroa

2020

Progress in Oceanography

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“…The high prevalence of the Munnopsidae in these samples was not surprising as studies have found that this family is the most common family in the deep sea. In the north Pacific abyssal regions around the Kuril-Kamchatka Trench, Munnopsidae have made up around half of all isopod specimens collected, 53.9% in Golovan et al (2018) and 47.4% in Elsner et al (2015), while in the Southern Ocean (Atlantic sector) Munnopsidae have made up 50% of all isopod specimens (Brandt et al 2007). In this study, the Ischnomesidae were the second highest in total isopod numbers, in contrast to other studies where the Desmosomatidae were the second most collected (Brandt et al 2007;Elsner et al 2015;Golovan et al 2018).…”

Section: K L Merrinmentioning

confidence: 97%

The lower bathyal and abyssal seafloor fauna of eastern Australia

et al. 2020

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Background Our knowledge of the benthic fauna at lower bathyal to abyssal (LBA, > 2000 m) depths off Eastern Australia was very limited with only a few samples having been collected from these habitats over the last 150 years. In May–June 2017, the IN2017_V03 expedition of the RV Investigator sampled LBA benthic communities along the lower slope and abyss of Australia’s eastern margin from off mid-Tasmania (42°S) to the Coral Sea (23°S), with particular emphasis on describing and analysing patterns of biodiversity that occur within a newly declared network of offshore marine parks. Methods The study design was to deploy a 4 m (metal) beam trawl and Brenke sled to collect samples on soft sediment substrata at the target seafloor depths of 2500 and 4000 m at every 1.5 degrees of latitude along the western boundary of the Tasman Sea from 42° to 23°S, traversing seven Australian Marine Parks. Results The biological sampling included 35 beam trawls, 28 Brenke sleds, 8 box cores, 20 surface meso-zooplankton tows, and 7 Deep Towed Camera transects. In total, 25,710 specimens were identified to 1084 taxonomic entities, including 847 species-level, 144 genus-level and 69 family-level and 24 higher-level taxa. Of the species-level taxa, only 457 were assigned species-level taxonomic names, which implies that up to 58% of the collected fauna is undescribed. In addition, the ranges of numerous species have been extended to include the western Tasman Sea. Conclusions The lower bathyal and abyssal fauna of soft sediment seafloors off eastern Australia has been systematically surveyed for the first time. The resultant collections will provide the foundation for much future ecological, biogeographical, phylogenetic and taxonomic research.

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“…For this study, we focused on the Haploniscidae -an abundant and speciose family of macrobenthic Isopoda in the NW Pacific (Elsner et al, 2015;Golovan et al, 2019). Kussakin (1988) summarized the knowledge of the Haploniscidae from KKT.…”

Section: Introductionmentioning

confidence: 99%

Changes in species composition of Haploniscidae (Crustacea: Isopoda) across potential barriers to dispersal in the Northwest Pacific

Johannsen

Lins

Brandt

2020

Progress in Oceanography

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Speciation processes as drivers of biodiversity in the deep sea are still not fully understood. One potential driver for species diversification might be allopatry caused by geographical barriers, such as ridges or trenches, or physiological barriers associated with depth. We analyzed biodiversity and biogeography of 21 morphospecies of the deep-sea isopod family Haploniscidae to investigate barrier effects to species dispersal in the Kuril-Kamchatka Trench (KKT) area in the Northwest (NW) Pacific. Our study is based on 2652 specimens from three genera, which were collected during the German-Russian KuramBio I (2012) and II (2016) expeditions as well as the Russian-German SokhoBio (2015) campaign. The sampling area covered two potential geographical barriers (the Kuril Island archipelago and the Kuril-Kamchatka Trench), as well as three depth zones (bathyal, abyssal, hadal). We found significant differences in relative species abundance between abyssal and hadal depths. Haploniscus belyaevi Birstein, 1963 was the dominant species at abyssal stations while H. hydroniscoides Birstein, 1963 was prevalent in the hadal. Species composition also differed significantly across geographical barriers. While H. hydroniscoides was the most abundant species in the open NW Pacific, not a single specimen of this species was found in the Sea of Okhotsk, which is separated from the Pacific basin by the Kuril Islands. Furthermore, H. belyaevi and two morphologically highly similar morphospecies were the only species found in samples from the Sea of Okhotsk, meaning that the other 18 species, which we identified from our samples, did not occur west of the Kuril Islands. In this study, haploniscid species show very diverse patterns in geographic distribution between geographic areas and with depth. Therefore, the KKT might have an isolating effect on both the bathymetric as well as geographic distribution of some haploniscid species from the NW Pacific into the Sea of Okhotsk and from the western to the eastern abyssal margin of the KKT.

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Deep down: Isopod biodiversity of the Kuril–Kamchatka abyssal area including a comparison with data of previous expeditions of the RV Vityaz

Cited by 29 publications

References 50 publications

Deep sea isopods from the western Mediterranean: Distribution and habitat

Deep sea isopods from the western Mediterranean: Distribution and habitat

The lower bathyal and abyssal seafloor fauna of eastern Australia

Changes in species composition of Haploniscidae (Crustacea: Isopoda) across potential barriers to dispersal in the Northwest Pacific

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