A novel probe to sample dissolved and particulate matter in sea ice at high vertical resolution DOI Creative Commons
Matthew Corkill,

Takenobu Toyota,

Daïki Nomura

и другие.

Elementa Science of the Anthropocene, Год журнала: 2025, Номер 13(1)

Опубликована: Янв. 1, 2025

Sea ice can be interspersed vertically with both permeable and impermeable layers. These features smaller than a few centimetres but are important for understanding biogeochemical cycles in sea ice. Traditionally, sea-ice samples collected by drilling into the rotating core barrel cutting head. Ice cores extracted then cut sections that melted to collect variable of interest. Drawbacks this method include difficulty thick contamination samples. Brines may also drain from their in-situ locations lost, meaning micro-environments overlooked or misrepresented. To address these drawbacks, we developed melt probe bores collects high-resolution The capability delineate layer dye artificial was tested during cold laboratory-based experiments. Complementary field experiments were carried out first-year landfast February–March 2023 at Saroma-ko Lagoon, Japan. Experiments consisted testing high-vertical-resolution as well its ability deployed on snow-covered able finer resolution (20 mm) traditional coring (approximately 50–100 could sample brine high vertical resolution. Melt-probe used measure iron without contamination. This proof-of-concept study provides an alternative sampling support new research fine-scale structures, applications dissolved particulate constituents including trace metals, macro-nutrients, microplastics gases.

Язык: Английский

Overwintering Fish Community in Ice‐Covered Environments in Hokkaido, Japan, Inferred From Environmental DNA DOI Creative Commons
Tatsuya Kawakami, Makoto Ozaki, Aya Yamazaki

и другие.

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

Опубликована: Март 1, 2025

ABSTRACT The overwintering ecology of fish in the seasonal ice zones (SIZs) remains largely unexplored owing to methodological limitations. Environmental DNA (eDNA) can reveal distribution and diversity species various aquatic environments, thereby offering a possible solution limitations SIZ studies. Therefore, we aimed detect community ice‐covered Saroma‐ko Lagoon, located on Okhotsk Sea coast Hokkaido, its inflow, using eDNA metabarcoding. extracted from under‐ice seawater collected lagoon yielded 28 taxa, predominantly Clupea pallasii based relative read abundance. Dissimilarity analysis suggested short‐term temporal variations composition seawater, even at same site. Nineteen Tribolodon brandtii T. hakonensis , were detected river water. high dissimilarity between results water segregation river. Fish meltwater sea was assigned five suggesting entrainment particulate matter containing during growth. true richness estimated discrepancies with historical reports suggest that sampling efforts need be optimized for environments promote more comprehensive detection. This study demonstrated usefulness metabarcoding under ice. Clarifying shedding patterns, persistence, dispersal would improve reliability this technique expand use SIZs.

Язык: Английский

Процитировано

0
A novel probe to sample dissolved and particulate matter in sea ice at high vertical resolution DOI Creative Commons
Matthew Corkill,

Takenobu Toyota,

Daïki Nomura

и другие.

Elementa Science of the Anthropocene, Год журнала: 2025, Номер 13(1)

Опубликована: Янв. 1, 2025

Sea ice can be interspersed vertically with both permeable and impermeable layers. These features smaller than a few centimetres but are important for understanding biogeochemical cycles in sea ice. Traditionally, sea-ice samples collected by drilling into the rotating core barrel cutting head. Ice cores extracted then cut sections that melted to collect variable of interest. Drawbacks this method include difficulty thick contamination samples. Brines may also drain from their in-situ locations lost, meaning micro-environments overlooked or misrepresented. To address these drawbacks, we developed melt probe bores collects high-resolution The capability delineate layer dye artificial was tested during cold laboratory-based experiments. Complementary field experiments were carried out first-year landfast February–March 2023 at Saroma-ko Lagoon, Japan. Experiments consisted testing high-vertical-resolution as well its ability deployed on snow-covered able finer resolution (20 mm) traditional coring (approximately 50–100 could sample brine high vertical resolution. Melt-probe used measure iron without contamination. This proof-of-concept study provides an alternative sampling support new research fine-scale structures, applications dissolved particulate constituents including trace metals, macro-nutrients, microplastics gases.

Язык: Английский

Процитировано

0