Sediments and biological samples from the 27th expedition of Peru (ANTARXXVII Leg 2) to Antarctica (Bransfield Strait, South Shetland Islands and Hope Bay) - data

Registros de Dados

Os dados deste recurso de evento de amostragem foram publicados como um Darwin Core Archive (DwC-A), que é o formato padronizado para compartilhamento de dados de biodiversidade como um conjunto de uma ou mais tabelas de dados. A tabela de dados do núcleo contém 38 registros.

Também existem 2 tabelas de dados de extensão. Um registro de extensão fornece informações adicionais sobre um registro do núcleo. O número de registros em cada tabela de dados de extensão é ilustrado abaixo.

This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.

Versões

A tabela abaixo mostra apenas versões de recursos que são publicamente acessíveis.

Como citar

Pesquisadores deveriam citar esta obra da seguinte maneira:

Delhaye L, Elskens M, Ricaurte-Villota C, Cerpa L, Kochzius M (2024). Sediments and biological samples from the 27th expedition of Peru (ANTARXXVII Leg 2) to Antarctica (Bransfield Strait, South Shetland Islands and Hope Bay) - data. Version 1.3. SCAR - AntOBIS. Samplingevent dataset. https://ipt.biodiversity.aq/resource?r=antarxxvii-leg2&v=1.3

Direitos

Pesquisadores devem respeitar a seguinte declaração de direitos:

O editor e o detentor dos direitos deste trabalho é SCAR - AntOBIS. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.

GBIF Registration

Este recurso foi registrado no GBIF e atribuído ao seguinte GBIF UUID: 50c52782-72ac-4d4a-bee0-014c6aede4df.  SCAR - AntOBIS publica este recurso, e está registrado no GBIF como um publicador de dados aprovado por Ocean Biodiversity Information System.

Palavras-chave

Samplingevent; Specimen

Contatos

Cobertura Geográfica

Bransfield Strait, Antarctica

Cobertura Taxonômica

Benthic organisms

Cobertura Temporal

Dados Sobre o Projeto

RECTO applies a multidisciplinary approach in studying evolution and diversity of Southern Ocean faunas. RECTO has 6 main objectives: 1) Reconstruct population histories and phylogenies of selected faunas; 2) Link population histories and refugia to past climate changes; 3) Estimate variation of morphological traits and width of ecological niches; 4) Use physiological and energy limits and traits to model current and future species distributions; 5) Integrate distribution models into hydrodynamic and particle models; and, 6) Develop different scenarios on how target taxa will respond to future climate change. RECTO will focus on six different animal groups, comprising different trophic levels from the micro- over macro-benthos and pelagic crustaceans to fish and seabirds. The selected species differ in their biology, life history traits and dispersal capacities, which are all factors affecting their abilities to cope with environmental changes.

O pessoal envolvido no projeto:

Métodos de Amostragem

Sampling at 30 stations was carried out using a Van Veen grab, initially with a large grab (48.5 cm x 47 cm x 25.5 cm) that broke after the first deployment and was replaced by a smaller grab (44 cm x 18.2 cm x 34.5 cm). To ensure sufficient samples, additional replicates were taken per station. The grab was deployed by the crew of the BAP Carrasco, with up to three attempts made at stations where no sample was retrieved due to unsuitable substrate or technical issues, resulting in four abandoned stations. At each successful grab, surface sediments were collected for microbiology, microplastics, and heavy metal studies, with approximately 200 g allocated for heavy metal research. Remaining sediments were shared among research groups and the surplus was sieved to isolate benthos. Benthic organisms found were sorted, photographed, and preserved in ethanol or frozen at -20°C, while tissue samples from brittle stars were preserved in 99% ethanol for DNA analysis before storing in the freezer at -20°C. Rock dredges were used for geological studies but occasionally brought sediments or organisms on board, allowing the team to collect one fish, three sediment samples, three sea stars, and five brittle stars. A Rauschert dredge with a 1 mm mesh size was deployed at three stations on February 26, 2020, after delays caused by weather and technical issues. The dredge was towed at 2 knots for 13–17 minutes per station, with 20 m of cable released per minute and retrieved at 30 m per minute. The first station at 975 m depth was unsuccessful and brought only plankton, amphipods, and ostracods. Adjustments improved results at the next two stations, with the second (46 m depth) yielding diverse organisms, including macroalgae, sponges, sea urchins, and starfish where many of which were not identified due to time constraint. The third station provided significant sediment, benthos, and a large octopus, which was carefully released unharmed. Some samples were shared with collaborators, and algae were not retained due to permit restrictions.

Descrição dos passos do método:

1. please see sampling description

Citações bibliográficas

1. Delhaye, Louise J., Marc Elskens, Constanza Ricaurte-Villota, Luis Cerpa, and Marc Kochzius. "Baseline concentrations, spatial distribution and origin of trace elements in marine surface sediments of the northern Antarctic Peninsula." Marine Pollution Bulletin 187 (2023): 114501. https://doi.org/10.1016/j.marpolbul.2022.114501
2. The Scientific Committee on Antarctic Research. (2023). SCAR Report 42 - September 2022 - SCAR Data Policy (2022). Zenodo. https://doi.org/10.5281/zenodo.7825314

Metadados Adicionais