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

et al.

Environmental DNA, Journal Year: 2024, Volume and Issue: 6(5)

Published: Sept. 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.

Language: Английский

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

et al.

Environmental DNA, Journal Year: 2025, Volume and Issue: 7(2)

Published: March 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.

Language: Английский

Citations

0
The Southern Ocean pelagic ecosystems around the Antarctic Peninsula DOI
Silvina Botta, Carlos Rafael Borges Mendes, Elisa Seyboth

et al.

Elsevier eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 303 - 322

Published: Jan. 1, 2025

Language: Английский

Citations

0
Know your limits; miniCOI metabarcoding fails with key marine zooplankton taxa DOI Creative Commons
Aitor Albaina, Rade Garić, Lidia Yebra

et al.

Journal of Plankton Research, Journal Year: 2024, Volume and Issue: 46(6), P. 581 - 595

Published: Nov. 1, 2024

Eleven years after the publication of first work applying deoxyribonucleic acid (DNA) metabarcoding to zooplankton communities, commonly known "miniCOI" barcode is widely used, becoming marker choice. However, several primer combinations co-exist for this and a critical evaluation their performance needed. This article reviews misperformance miniCOI with marine comparing them microscopy and/or other universal markers. In total, misperformances were reported 26 taxa, including 18 copepods five tunicates. We report detection failure Class Appendicularia contrasting performances

Language: Английский

Citations

3
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

et al.

Environmental DNA, Journal Year: 2024, Volume and Issue: 6(5)

Published: Sept. 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.

Language: Английский

Citations

0