Nauki Ścisłe i Nauki o Ziemi

Polish Polar Research

Zawartość

Polish Polar Research | 2025 | vol. 46 | No 3

Abstrakt

The structure of the oceanic crust generated by the ultraslow-spreading mid-ocean Knipovich Ridge still remains relatively uninvestigated compared to the other North Atlantic spreading ridges further south. The complexity of the Knipovich Ridge, with its oblique ultraslow-spreading and segmentation, makes this end-member of Spreading Ridge Systems an important and challenging ridge to investigate. The Ocean Bottom Seismometer (OBS) data along a refraction/reflection profile (ca. 280 km) crossing the Knipovich Ridge off the western Barents Sea was acquired during cruise of RV G.O. Sars on July 24 to August 6, 2019. The seismic energy was emitted by air-guns with total volume of 80 l. To receive and record the seismic waves at the seafloor, ocean bottom seismometers were deployed. Seismic energy from airgun shots were recorded up to 50 km from the OBSs. The profile provides information on the seismic structure of the oceanic crust in the Knipovich Ridge area. Seismic record sections were analyzed with 2D trial-and-error forward seismic modeling. The crust thickness is variable and the Moho boundary depth changes between 7 and 12 km with P-wave velocity below the interface 7.9–8.0 km/s. The Moho discontinuity attains its minimum depth not directly beneath the Knipovich Ridge, but roughly 30 km to the southeast.
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Autorzy i Afiliacje

Wojciech Czuba
1
ORCID: ORCID
Yoshio Murai
2
ORCID: ORCID
Tomasz Janik
1
ORCID: ORCID
Andrzej Górszczyk
1
ORCID: ORCID
Krzysztof Michalski
1
ORCID: ORCID

  1. Institute of Geophysics, Polish Academy of Sciences, Ks. Janusza 64, 01-452 Warszawa, Poland
  2. Hokkaido University, Kita 8, Nishi 5, Kita-ku, Sapporo, Hokkaido, 060-0808 Japan

Abstrakt

This study presents a comprehensive analysis of epibenthic lebensspuren, i.e., biogenic surface traces, and their tracemakers in the fjords of Svalbard. Data were collected over six Arctic summer seasons (2015–2017, 2019, 2020, and 2023) and one winter season (2016), across 206 stations, 57% of which exhibited lebensspuren. Nineteen distinct lebensspuren morphotypes were identified, including eight newly described forms. Tracemakers were identified for 18 of these types, and specific species or genera determined for 10. Echinoderms were the dominant group, responsible for 55% of all traces, followed by decapods (20%) and gastropods (17%). The study documents lebensspuren morphology and ethology along with their associated tracemakers, offering insights into their abundance and spatial distribution within fjord ecosystems. Notable findings include the high frequency of lebensspuren produced by the sea star Urasterias lincki, along with significant contributions from brittle stars, shrimps, and gastropods. Distribution patterns were influenced by environmental factors such as proximity to glaciers and river mouths; however, non-metric multidimensional scaling analysis revealed no clear community separations. This dataset can serve as a valuable resource for the interpretation and classification of trace fossils (i.e., fossil analogues of lebensspuren), while highlighting the ecological and paleoenvironmental importance of lebensspuren in Arctic marine systems.
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Autorzy i Afiliacje

Kajetan Deja
1
ORCID: ORCID
Alfred Uchman
2
ORCID: ORCID

  1. Institute of Oceanology of the Polish Academy of Sciences, Powstańców Warszawy 55, 81-712 Sopot, Poland
  2. Faculty of Geography and Geology, Jagiellonian University, Gronostajowa 3a, 30-087 Kraków, Poland

Abstrakt

The detrimental impacts of human activity in Antarctica can pose significant threats to the continent’s ecosystems and diversity. Various pollutants have been detected in Antarctica, including hydrocarbon compounds derived from oils. The widespread use of canola oil in catering at Antarctic research stations raises the possibility of its release into the environment, either through accidental spillage or via waste cooking oil present in grey water. To help address this issue, a bacterial consortium (reference BS14) obtained from the natural Antarctic environment was isolated and confirmed to be capable of breaking down canola oil. The identity of members of the consortium was investigated using metagenomic analysis, with lipase-producing bacteria further examined using Sanger sequencing. The consortium in media not exposed to canola oil consisted primarily of Proteobacteria and Firmicutes in almost equal percentages. After being exposed to either fresh or waste canola oil, high proportions of representatives of Pseudomonadaceae and Carnobacteriaceae were present. Amongst the bacterial taxa identified in the metagenomic analysis, representatives of the genera Pseudomonas and Carnobacterium were confirmed to be responsible for biodegrading waste canola oil and pure canola oil. This study offers novel insights into the potential of bacterial consortia for canola oil bioremediation in Antarctica.
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Autorzy i Afiliacje

Khadijah Nabilah Mohd Zahri
1
ORCID: ORCID
Surian Sabri
ORCID: ORCID
Claudio Gomez-Fuentes
2 3
ORCID: ORCID
Khalilah Abdul Khalil
4
ORCID: ORCID
Peter Convey
5 6 7
ORCID: ORCID
Azham Zulkharnain
8
ORCID: ORCID
Siti Aqlima Ahmad
1 2
ORCID: ORCID

  1. Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
  2. Center of Antarctic Environmental Monitoring Research (CIMAA), Universidad de Magallanes, Avda. Bulnes 01855, Punta Arenas, Chile
  3. Department of Chemical Engineering, Universidad de Magallanes, Avda. Bulnes 01855, Punta Arenas, Chile
  4. Faculty of Applied Sciences, Universiti Teknologi MARA, Section 2, Shah Alam 45000, Selangor, Malaysia
  5. British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK
  6. Department of Zoology, University of Pretoria, Auckland Park 2006, South Africa
  7. Country Millennium Institute Biodiversity of Antarctic and Subantarctic Ecosystems (BASE), Las Palmeras 3425, Ñuñoa 7750000, Santiago, Chile
  8. College of Systems Engineering and Science, Shibaura Institute of Technology, 307 Fukasaku, Minuma-ku, Saitama, 337-8570, Japan

Instrukcja dla autorów


The quarterly Polish Polar Research invites original scientific papers dealing with all aspects of polar research. The journal aims to provide a forum for publication of high-quality research papers, which are of international interest.

We warmly welcome review papers and proposals for thematic Special Issues.

Articles must be written in English. Authors are requested to have their manuscript read by a person fluent in English before submission. They should not be longer than 30 typescript pages, including tables, figures and references. However, upon request, longer manuscripts may be considered for publication. All papers are peer-reviewed. With a submitted manuscript, authors should provide e-mail addresses of at least three suggested reviewers.


Submission of the manuscript should be supported with a declaration that the work described has not been published previously nor is under consideration by another journal.

For text submission, Word file format is preferred. Please use the PPRes style template when preparing the final version of your paper. Pay special attention to writing correctly the list of references with doi. Manuscripts which are not prepared in line with the template will be returned to the authors. Please submit your manuscripts using our online submission system.

The journal does not have article processing charges (APCs) nor article submission charges. No honorarium will be paid to authors for publishing papers.





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