Extremely low biodiversity Arctic intertidal habitats as sentinels for environmental change DOI Creative Commons
Huw J. Griffiths, Catherine Waller, Stephen J. Roberts

и другие.

Frontiers in Marine Science, Год журнала: 2024, Номер 11

Опубликована: Дек. 2, 2024

The Arctic is undergoing dramatic changes, including an unprecedented decline in sea ice. Previous studies have shown the severe structuring impact of ice scour upon polar intertidal communities. A example influence highly depauperate Cambridge Bay (Iqaluktuuttiaq) on Victoria Island, Nunavut, Canada. dominated by a single species amphipod crustacean, Gammarus setosus , with rare examples another amphipod, bivalve molluscs, and oligochaetes. Primary producers are limited to thin algal film, no macroalgae present shallower than 2 m water depth. This biodiversity has remained extremely low since it was first surveyed 70 years ago, however, seasonal thickness been for over 50 years. Given observed increases biomass decreased cover elsewhere presence Canadian High Research Station, we suggest that offers ideal location cost, effort, long-term monitoring change tipping points may be influenced loss as part network stations.

Язык: Английский

Pan‐Arctic distribution modeling reveals climate‐change‐driven poleward shifts of major gelatinous zooplankton species DOI Creative Commons
Dmitrii Pantiukhin, Gerlien Verhaegen, Charlotte Havermans

и другие.

Limnology and Oceanography, Год журнала: 2024, Номер 69(6), С. 1316 - 1334

Опубликована: Май 15, 2024

Abstract Anthropogenic activities, including climate change, are hypothesized to cause increases in gelatinous zooplankton population sizes and blooms. In the most rapidly changing ecosystem, Arctic Ocean, this hypothesis has not yet been verified, is commonly excluded from large‐scale modeling studies. Our study based on an extensive biogeographic dataset, aggregating four open‐source databases (Ocean Biodiversity Information System, Global Facility, Jellyfish Database Initiative, PANGAEA). It includes data eight of reported taxa pan‐Arctic region ( Aglantha digitale , Sminthea arctica Periphylla periphylla Cyanea capillata Oikopleura vanhoeffeni Fritillaria borealis Mertensia ovum Beroe spp.). By coupling three‐dimensional species distribution models with oceanographic components Max Planck Institute Earth System Model (MPI‐ESM1.2), run for historical (1950–2014) future (2050–2099) periods under shared socioeconomic pathway SSP370 scenario forcing, we identified expanding or contracting habitat ranges response change. projections indicated a general tendency distributions shift, varying degrees suitable expansion (largest scyphozoan C. ~ +180%) contraction hydrozoan Sm. −15%). Seven modeled, which—similar majority occurring Ocean—predominantly represented arcto‐boreal boreal taxa, projected shift northern latitudes. Hence, profound impacts marine environment associated ecosystem services can be expected.

Язык: Английский

Процитировано

8
Insights into the feeding of jellyfish polyps in wild and laboratory conditions: do experiments provide realistic estimates of natural functional rates? DOI Creative Commons
Cathy H. Lucas, Danja Hoehn, Clive N. Trueman

и другие.

Hydrobiologia, Год журнала: 2025, Номер unknown

Опубликована: Март 14, 2025

Язык: Английский

Процитировано

0
Metazoan Diversity and Its Drivers: An eDNA Survey in the Pacific Gateway of a Changing Arctic Ocean DOI Creative Commons
Gerlien Verhaegen, Tatsuya Kawakami, Ayla Murray

и другие.

Environmental DNA, Год журнала: 2025, Номер 7(2)

Опубликована: Март 1, 2025

ABSTRACT Climate change drives species to adapt or undergo range shifts survive. The Arctic Ocean, experiencing more drastic environmental changes than any other ocean, has two primary inflow regions that facilitate these shifts: the wide, deep Atlantic Gateway and narrow, shallow Pacific Gateway. Environmental DNA (eDNA) surveys have proven be effective in characterizing community composition understanding its ecological drivers. We conducted first COI marker‐based eDNA survey analyzed seawater samples from various geographic regions, depths, water masses across Bering Strait, Chukchi Sea, South Beaufort Sea. Metazoan taxa 15 different phyla indicator for were identified. characterized a highly diverse neritic fauna Strait aligning with known locations of benthic hotspots. On slope we observed transitions copepod‐dominated epipelagic waters cnidarian‐ sponge‐dominated deeper areas. Alpha diversity peaked near seabed coastlines was highest within warmest Alaskan Coastal Water mass. linked metazoan communities variables, being associated higher temperatures fluorescence, majority them lower salinities. This included mostly Pseudocalanus copepod verongiid sponges. While rising might enhance alpha diversity, anticipate this will primarily due influx warmer fresher masses. Several taxa, including bivalve Macoma calcarea seastar Leptasterias arctica , as well jellyfish Chrysaora melanaster Triconia borealis colder, saltier likely negatively impacted by ongoing change. Our study successfully rapidly changing Ocean.

Язык: Английский

Процитировано

0
A belly full of jelly? DNA metabarcoding shows evidence for gelatinous zooplankton predation by several fish species in Greenland waters DOI Creative Commons
Annkathrin Dischereit,

Julia Katharina Throm,

Karl Michael Werner

и другие.

Royal Society Open Science, Год журнала: 2024, Номер 11(8)

Опубликована: Авг. 1, 2024

The waters of Greenland harbour a high species richness and biomass gelatinous zooplankton (GZP); however, their role in the diet many fish species, including commercially exploited has not yet been verified. Traditionally, GZP was considered to be trophic dead end, i.e. with limited contribution as prey for higher levels. We applied DNA metabarcoding two gene fragments (COI, 18S V1–V2) stomach contents seven pelagic demersal waters, identify composition well occurrence predation. detected reads stomachs all investigated frequency occurrences ranging from 12.5% (for Melanogrammus aeglefinus ) 50% Argentina silus ). predation had reported several these species. were found majorly contribute A. Anarhichas denticulatus , particularly, siphonophore Nanomia cara scyphozoan Atolla importance prey, respectively. use multiple genetic markers enabled us detect total 59 taxa being only by one markers.

Язык: Английский

Процитировано

2
Hello puffins, goodbye belugas: changing Arctic fjord hints at our climate future DOI

Freda Kreier

Nature, Год журнала: 2024, Номер unknown

Опубликована: Апрель 25, 2024

Язык: Английский

Процитировано

0
The Sinking Dead—Arctic Deep‐Sea Scavengers' Diet Suggests Nekton as Vector in Benthopelagic Coupling DOI Creative Commons
Lara Schmittmann, Sophie V. Schindler, Till Bayer

и другие.

Environmental DNA, Год журнала: 2024, Номер 6(5)

Опубликована: Сен. 1, 2024

ABSTRACT Many benthic deep‐sea animals rely on carcasses from the overlying water column that sink to seafloor and form local organic enrichments known as food falls. This flux of carbon shallow pelagic deep sea is part biological pump (BCP) such contributes sequestration. For a complete understanding budgets, it crucial identify diversity distribution sinking which are difficult detect by observational methods. Here, we analyzed diet abundant amphipod scavenger, Eurythenes gryllus , DNA metabarcoding assess their potential falls in Fram Strait, gateway Arctic. E. scavenges nekton but so far was not certain whether this represents main diet. We detected dietary taxa (26 total) 20 out 101 amphipods. found amphipods primarily fed larger including fish, cephalopods, mammals, with bony fish being most targeted source terms abundance. Only one had gelatinous organism. These results support hypothesis targets mostly The differed between Eastern Western suggests regional variability availability. also detected, for first time infections parasitic dinoflagellate Hematodinium . detection demonstrates revealing both web dynamics host–parasite interactions sea. seems promising “natural sampler” monitor will help investigate importance medium‐sized vertical export rapidly changing Arctic Ocean.

Язык: Английский

Процитировано

0
The secret meal of Antarctic mesopelagic fish (Myctophidae: Electrona) revealed by multi-marker metabarcoding DOI Creative Commons
Micaela Ruiz, Ryan A. Saunders, Geraint A. Tarling

и другие.

Frontiers in Marine Science, Год журнала: 2024, Номер 11

Опубликована: Ноя. 19, 2024

Introduction In the Southern Ocean, myctophids are most successful pelagic fish group in terms of diversity, biomass, and abundance. They play a crucial role linking primary consumers coupling carbon flux between surface mesopelagic depths. Understanding their trophodynamics is key to assessing ecosystem resilience under environmental change. Conventional stomach content analyses indicate that predominantly feed on crustaceans, such as copepods euphausiids, but less effective at detecting easily digestible, soft-bodied organisms like gelatinous zooplankton (GZP) pteropods. Methods This study used multimarker (COI Leray-XT 18S v1-v2) DNA metabarcoding analyze diets two abundant Scotia Sea, Electrona antarctica carlsbergi . Results discussion We found diverse diet dominated by followed pteropods GZP frequency occurrence relative read abundances. Within GZP, salps appendicularians were major components for E. , while hydrozoans prominent With regards seasonal spatial variability dietary contribution consumed primarily appendicularians, chaetognaths, during spring (2006) northern region, more (predominantly Ilhea racovitzai ) other cnidarians autumn (2009) southern region. Our reveals diversity myctophid well importance consumption trophic pathway Ocean.

Язык: Английский

Процитировано

0
Extremely low biodiversity Arctic intertidal habitats as sentinels for environmental change DOI Creative Commons
Huw J. Griffiths, Catherine Waller, Stephen J. Roberts

и другие.

Frontiers in Marine Science, Год журнала: 2024, Номер 11

Опубликована: Дек. 2, 2024

The Arctic is undergoing dramatic changes, including an unprecedented decline in sea ice. Previous studies have shown the severe structuring impact of ice scour upon polar intertidal communities. A example influence highly depauperate Cambridge Bay (Iqaluktuuttiaq) on Victoria Island, Nunavut, Canada. dominated by a single species amphipod crustacean, Gammarus setosus , with rare examples another amphipod, bivalve molluscs, and oligochaetes. Primary producers are limited to thin algal film, no macroalgae present shallower than 2 m water depth. This biodiversity has remained extremely low since it was first surveyed 70 years ago, however, seasonal thickness been for over 50 years. Given observed increases biomass decreased cover elsewhere presence Canadian High Research Station, we suggest that offers ideal location cost, effort, long-term monitoring change tipping points may be influenced loss as part network stations.

Язык: Английский

Процитировано

0