Arctic chironomids of the northwest North Atlantic reflect environmental and biogeographic gradients

Medeiros, Andrew S.; Milošević, Đurađ; Francis, Daniel; Maddison, Eleanor J.; Woodroffe, Sarah A.; Long, Antony J.; Walker, Ian R.; Hamerlík, Ladislav; Quinlan, Roberto; Langdon, Peter G.; Brodersen, Kasper Elgetti; Axford, Yarrow

doi:10.1111/jbi.14015

Cited by 14 publications

(17 citation statements)

References 69 publications

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“…The importance of temperature for the distribution of Chironomids discovered in this work is consistent with previously published studies (Medeiros et al., 2021 ; Medeiros & Quinlan, 2011 ). Notably, precipitation is proved to be associated with the distribution of chironomids, which has not been mentioned before.…”

Section: Discussionsupporting

confidence: 93%

Toward a global DNA barcode reference library of the intolerant nonbiting midge genus Rheocricotopus Brundin, 1956

Jiang

Liu

et al. 2021

Ecology and Evolution

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Environmental DNA metabarcoding is becoming a predominant tool in biodiversity assessment, as this time‐ and cost‐efficient tactics have the ability to increase monitoring accuracy. As a worldwide distributed genus, Rheocricotopus Brundin, 1956 still does not possess a complete and comprehensive global DNA barcode reference library for biodiversity monitoring. In the present study, we compiled a cytochrome c oxidase subunit 1 (COI) DNA barcode library of Rheocricotopus with 434 barcodes around the world, including 121 newly generated DNA barcodes of 32 morphospecies and 313 public barcodes. Automatic Barcode Gap Discovery (ABGD) was applied on the 434 COI barcodes to provide a comparison between the operational taxonomic units (OTU) number calculated from the Barcode Index Number (BIN) with the “Barcode Gap Analysis” and neighbor‐joining (NJ) tree analysis. Consequently, these 434 COI barcodes were clustered into 78 BINs, including 42 new BINs. ABGD yielded 51 OTUs with a prior intraspecific divergence of Pmax = 7.17%, while NJ tree revealed 52 well‐separated clades. Conservatively, 14 unknown species and one potential synonym were uncovered with reference to COI DNA barcodes. Besides, based on our ecological analysis, we discovered that annual mean temperature and annual precipitation could be considered as key factors associated with distribution of certain members from this genus. Our global DNA barcode reference library of Rheocricotopus provides one fundamental database for accurate species delimitation in Chironomidae taxonomy and facilitates the biodiversity monitoring of aquatic biota.

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Section: Discussionsupporting

confidence: 93%

Toward a global DNA barcode reference library of the intolerant nonbiting midge genus Rheocricotopus Brundin, 1956

Jiang

Liu

et al. 2021

Ecology and Evolution

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“…However, the rate at which warm eurythermal taxa move north and overall diversity increases in the Arctic is dependent in part on dispersal capabilities of different organism groups and existing barriers to dispersal (Culp et al., 2012; Heino et al., 2009; Medeiros et al., 2020). For example, changes to diversity may occur at a slower rate on Arctic islands, where physical distance and a lack of geographical connectivity to the mainland acts as a barrier to dispersal and limits the northward movement of eurythermic species (Castella et al., 2001; Culp et al., 2012; Medeiros et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Benthic macroinvertebrates are an ideal organism group to assess the long‐term ecological effects of climate change on Arctic freshwater diversity because they provide time‐integrated responses to environmental conditions, including those induced by landscape‐level changes in vegetation and hydrology (Brown et al., 2018; Resh, 2008), and different taxa have varied levels of dispersal capability (Medeiros et al., 2020; Sarremejane et al., 2020). Moreover, benthic macroinvertebrate diversity, composition, and species distribution patterns have been shown to reflect temperature gradients in the Arctic (Culp et al., 2019; Lento et al., 2020; Medeiros et al., 2020) and alpine regions (Brighenti et al., 2019; Khamis et al., 2014; Niedrist & Füreder, 2021).…”

Section: Introductionmentioning

confidence: 99%

Temperature and spatial connectivity drive patterns in freshwater macroinvertebrate diversity across the Arctic

et al. 2021

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“…No statistically significant differences in species richness ( S ), species abundance ( N ), species biomass ( B ), Shannon's diversity index ( H ), or Simpson's index ( D ) between the control and treatment groups were observed. These diversity metrics describe the community structure, which is shaped by local environmental factors, dispersal, and biotic interactions (Medeiros et al 2020).…”

Section: Discussionmentioning

confidence: 99%

In Situ Effects of a Microplastic Mixture on the Community Structure of Benthic Macroinvertebrates in a Freshwater Pond

Stanković

Milošević

Jovanović

et al. 2021

Enviro Toxic and Chemistry

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Benthic communities contain some of the most threatened organisms in aquatic habitats due to different anthropogenic pressures. The high abundance of microplastics in sediments will continue to increase in the future, further increasing the probability of interactions between macroinvertebrates and microplastics. In the present study, a benthic community in a relatively pristine shallow pond was exposed either to an environmentally relevant high concentration of a microplastic mixture of 80 g m–2 in the sediment, or a control sediment, without the addition of microplastics. The mixture of microplastics contained irregularly shaped polyethylene, polyvinyl chloride, and polyamide in a ratio of 50:25:25%, respectively. The in situ experiment lasted for 100 d. The total number of taxa that colonized the microcosms was 22 (17 in the control and 18 in the microplastic treatment), and the colonization was not affected by the treatment. The most dominant group within the macroinvertebrate community was the dipteran family Chironomidae, in both the control and the microplastic treatment. No significant differences in the abundance and biomass at a community level were recorded between the groups by permutational multivariate analysis of variance (F = 0.993, p = 0.456 and F = 0.344, p = 0.797, respectively). The mixture of microplastics did not influence the abundance or biomass of the functional feeding groups (F = 1.810, p = 0.137 and F = 0.377, p = 0.736, respectively). The species richness, species abundance, species biomass, Shannon's diversity index, and Simpson's index of diversity showed no statistically significant differences between the control and treatment groups. Czekanowski's quantitative similarity index indicated that 84% of the community remained unaffected after microplastic exposure. Environ Toxicol Chem 2022;41:888–895. © 2021 SETAC

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Arctic chironomids of the northwest North Atlantic reflect environmental and biogeographic gradients

Cited by 14 publications

References 69 publications

Toward a global DNA barcode reference library of the intolerant nonbiting midge genus Rheocricotopus Brundin, 1956

Toward a global DNA barcode reference library of the intolerant nonbiting midge genus Rheocricotopus Brundin, 1956

Temperature and spatial connectivity drive patterns in freshwater macroinvertebrate diversity across the Arctic

In Situ Effects of a Microplastic Mixture on the Community Structure of Benthic Macroinvertebrates in a Freshwater Pond

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