Distribution of Macroalgae in the area of Calvi (Corsica, Mediterranean Sea)
Versão mais recente publicado por Université Libre de Bruxelles (ULB) em 25 de Junho de 2021 Université Libre de Bruxelles (ULB)

This dataset describes the occurrences of 19 species of macroalgae along standardized transects in the Bay of Calvi (Corsica). This dataset was based on 2 different campaigns (one in 2016 and one in 2019) in the Bay of Calvi. In both campaigns, an underwater remotely operated vehicle (ROV) was deployed in the Bay and navigated along straight transects perpendicular to the coastline. The ROV was equipped with a down-looking GoPro camera, to capture footage of the bottom, and a built-in front-looking camera to capture a general view of the landscape and navigation. Algae were identified and their coverage was quantified using the down-looking videos.

The species of macroalgae are the following : Acetabularia acetabulum, Amphiroa rigida, Caulerpa prolifera, Caulerpa cylindracea, Codium bursa, Colpomenia sinuosa, Corralinales (order), Cystoseira brachycarpa, Cystoseira crinita, Cystoseira spinosa, Cystoseira zosteroides, Dictyota (genus), Flabellia petiolata, Halopteris (genus), Halopteris scoparia, Jania (genus), Osmundaria volubilis, Padina pavonica, Peyssonnelia squamaria.

In this project, each of the "events" represent different transects navigated by the ROV. The points on the map are the location of the beginning of each transect (located on the coast). From this point, the ROV navigated perpendicularly to the coast until the end of the rocky shore. The actual geographic position of each algae is not recorded, but only the presence of each algae species along this transect.

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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 17 registros.

Também existem 1 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.

  • Event (core)
    17
  • Occurrence 
    137

Este IPT armazena os dados e, portanto, serve como um repositório de dados. Os dados e os metadados do recurso estão disponíveis para download no seção de downloads. A tabela de versões lista outras versões do recurso que foram disponibilizadas ao público e permite o rastreamento das alterações realizadas no recurso ao longo do tempo.

Downloads

Baixe a última versão do recurso de dados, como um Darwin Core Archive (DwC-A) ou recurso de metadados, como EML ou RTF:

Dados como um arquivo DwC-A download 17 registros em English (8 kB) - Frequência de atualização: não plenejado
Metadados como um arquivo EML download em English (19 kB)
Metadados como um arquivo RTF download em English (13 kB)
Versões

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

Como citar

Pesquisadores deveriam citar esta obra da seguinte maneira:

Katz L, Sirjacobs D, Danis B (2021): Distribution of Macroalgae in the area of Calvi (Corsica, Mediterranean Sea). v1.7. Université Libre de Bruxelles (ULB). Dataset/Samplingevent. https://ipt.biodiversity.be/resource?r=macroalgae_of_calvi&v=1.7

Direitos

Pesquisadores devem respeitar a seguinte declaração de direitos:

O editor e o detentor dos direitos deste trabalho é Université Libre de Bruxelles (ULB). 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: e82beebb-d3ce-4236-a46f-aec303d1cc86.  Université Libre de Bruxelles (ULB) publica este recurso, e está registrado no GBIF como um publicador de dados aprovado por Belgian Biodiversity Platform.

Palavras-chave

Occurrence; Macroalgae; Corsica; Calvi; biodiversity; benthic communities; ROV; underwater imagery; invasive species; coverage; photogrammetry

Contatos

Quem pode responder a perguntas sobre o recurso:

Quem preencher os metadados:

Lea Katz
Student
Université Libre de Bruxelles
Brussels
BE
https://biomar.ulb.ac.be/

Quem mais foi associado com o recurso:

Autor
Lea Katz
Student
Université Libre de Bruxelles
BE
Autor
Bruno Danis
Associate Professor
Université Libre de Bruxelles
BE
http://biomar.ulb.ac.be
Cobertura Geográfica

The area of interest is the Bay of Calvi. Total coverage of the dataset is the extent of 17 ROV transects (12 carried out in 2016, 5 in 2019), perpendicular to coast line. Transects are distributed in the whole Bay of Calvi, Corsica (Mediterranean Sea). More specifically, the area between Punta Revellata and Punta Spano was the focus of our study.

Coordenadas delimitadoras Sul Oeste [42,553, 8,709], Norte Leste [42,617, 8,83]
Cobertura Taxonômica

Most algae were identified to genus or species, encrusting algae were identified as “Corralinales”.

Ordem  Corralinales
Gênero  Dictyota,  Halopteris,  Jania
Espécie  Acetabularia acetabulum,  Amphiroa rigida,  Caulerpa prolifera,  Caulerpa cylindracea,  Codium bursa,  Colpomenia sinuosa,  Cystoseira brachycarpa,  Cystoseira crinita,  Cystoseira spinosa,  Cystoseira zosteroides,  Flabellia petiolata,  Halopteris scoparia,  Osmundaria volubilis,  Padina pavonica,  Peyssonnelia squamaria
Cobertura Temporal
Data Inicial / Data final 2016-07-17 / 2016-07-21
Data Inicial / Data final 2019-06-05 / 2019-06-07
Dados Sobre o Projeto

Master's thesis.

Título Evaluation of ROV imagery for the study of macroalgae communities in the Bay of Calvi, Corsica. Master Thesis
Financiamento This project was driven by Lea Katz's master thesis, co-supervised by Damien Sirjacobs and Sylvie Gobert (Université de Liège) and by Bruno Danis (Université Libre de Bruxelles). The project received logistics support from the STARESO station, Université de Liège (Pierre Lejeune).
Descrição da Área de Estudo The area of interest was the near-shore area of the Bay of Calvi. In particular, rocky bottoms, areas around Posidonia meadows and few bare sediment areas. Analyzed area covered the 0-40m depth layer.
Descrição do Design The goal of this Master’s thesis was to evaluate underwater ROV imagery for the study of macroalgae communities and to assess the current state of macroalgae diversity in the Bay of Calvi. We also compared the current diversity data with older macroalgae diversity data. A secondary goal was to assess the invasion of Caulerpa cylindracea (an invasive macroalgae in the region).

O pessoal envolvido no projeto:

Autor
Lea Katz
Métodos de Amostragem

Each transect was filmed by GoPro cameras attached to an underwater Remotely Operated Vehicle (ROV). Videos were visualised and annotated using the software "COVER" (Carré 2010). For each transect, species were identified and relative cover and abundance were estimated.

Área de Estudo The study is based on 2 sampling campaigns. Both campaigns covered the same area (see "geographic coverage"). The lenght of the transects is variable but is around 100m in general. The first one occurred in july 2016 and was performed over several days. Each transect was observed 1 time. The second campaign took place in june 2019. Again, several days were needed to observe the different transects. Each transect was observed 1 time.
Controle de Qualidade In some videos, species identification was validated by another algae specialist (Damien Sirjacobs, Université de Liège). We also replicated one transect with a team of divers who did their own identifications. This proved that our ROV/video method was strong and provided similar results.

Descrição dos passos do método:

  1. For each transect : - an underwater ROV was navigated at approximately 1m from the bottom in a straight line perpendicular to the shore. It was equipped with cameras filming the bottom and the surroundings. - in the lab, down-looking video was analysed and annotated. Species are identified. Information about depth, salinity, temperature and cover were retrieved for each algae observation. - abundances of different macroalgae were compared between transects (spatial comparisons) and between different years (temporal comparisons).
Metadados Adicionais
Identificadores alternativos e82beebb-d3ce-4236-a46f-aec303d1cc86
https://ipt.biodiversity.be/resource?r=macroalgae_of_calvi