Descripción
This dataset gathers amphibian observations collected within the CROA project since 2023. It documents species presence, activity, and reproductive behavior across a range of aquatic habitats, including ponds, ditches, and natural or managed wetlands. The data include species detections, survey conditions, site locations, and sampling effort information, providing a basis for monitoring population status and supporting conservation actions in urban and peri-urban environments.
License: CC BY 4.0
Registros
Los datos en este recurso de registros biológicos han sido publicados como Archivo Darwin Core(DwC-A), el cual es un formato estándar para compartir datos de biodiversidad como un conjunto de una o más tablas de datos. La tabla de datos del core contiene 112 registros.
Este IPT archiva los datos y, por lo tanto, sirve como repositorio de datos. Los datos y los metadatos del recurso están disponibles para su descarga en la sección descargas. La tabla versiones enumera otras versiones del recurso que se han puesto a disposición del público y permite seguir los cambios realizados en el recurso a lo largo del tiempo.
Versiones
La siguiente tabla muestra sólo las versiones publicadas del recurso que son de acceso público.
¿Cómo referenciar?
Los usuarios deben citar este trabajo de la siguiente manera:
Dokhelar T, Besnard A (2026). CROA Project: Urban Amphibian Occurrences and Monitoring in Southern France. Version 1.4. Centre d’Ecologie Fonctionnelle & Evolutive (CEFE). Occurrence dataset. https://ipt.gbif.fr/resource?r=croa_cefe&v=1.4
Derechos
Los usuarios deben respetar los siguientes derechos de uso:
El publicador y propietario de los derechos de este trabajo es Centre d’Ecologie Fonctionnelle & Evolutive (CEFE). Esta obra está bajo una licencia Creative Commons de Atribución/Reconocimiento (CC-BY 4.0).
Registro GBIF
Este recurso ha sido registrado en GBIF con el siguiente UUID: 9fd8ed05-3ae6-453a-878a-c0a272a2b849. Centre d’Ecologie Fonctionnelle & Evolutive (CEFE) publica este recurso y está registrado en GBIF como un publicador de datos avalado por GBIF France.
Palabras clave
amphibians freshwater habitats wetlands urban environments urban ecology long-term monitoring biodiversity monitoring citizen science population monitoring population dynamics reproductive activity sampling effort field surveys species occurrence conservation biology occurence; Observation
Contactos
https://orcid.org/https://orcid.org/0000-0002-8780-767X
- Originador ●
- Punto De Contacto
Cobertura geográfica
N/A
| Coordenadas límite | Latitud Mínima Longitud Mínima [43,624, 3,822], Latitud Máxima Longitud Máxima [43,664, 3,888] |
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Datos del proyecto
No hay descripción disponible
| Título | CROA Project: Amphibians in Urban Environments (CEFE) |
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Personas asociadas al proyecto:
Métodos de muestreo
Sampling follows a standardized field protocol based on repeated surveys of spatial grid cells during the amphibian reproductive season. Each grid cell is surveyed up to three times per year, ideally once in early spring (March–April), once in mid-spring (May), and once in late spring (June), in order to capture the phenology of different species and life stages. Surveys are primarily conducted at night, when amphibian activity and detectability are highest, using visual searches with headlamps and acoustic detection of calling males. Daytime surveys are occasionally carried out in sites with restricted nocturnal access. During each visit, all amphibians observed are recorded, including species identity (or the most precise taxonomic level possible), life stage (adult, juvenile, egg mass, tadpole), estimated abundance, and behavioral context (e.g. calling, in water, on land). In parallel, all aquatic habitats encountered within each grid cell are inventoried and characterized, allowing the monitoring of breeding sites and habitat availability over time.
| Área de Estudio | The CROA project focuses on monitoring amphibian populations in urban and peri-urban environments in the northern part of Montpellier and surrounding municipalities (southern France). The study area is subdivided into predefined spatial grid cells (mailles), each identified by a unique identifier, covering a mosaic of habitats including urban parks, residential areas, wastelands, riverbanks, retention basins, wetlands, and other aquatic or semi-aquatic environments. Data have been collected continuously since 2023, with surveys conducted during the amphibian breeding season from March to June. The spatial and temporal extent of the dataset reflects variations in sampling effort between years, while providing long-term baseline information on species occurrence, breeding activity, and habitat use in an urban context. |
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Descripción de la metodología paso a paso:
- Field data are collected directly in the field using the QField mobile application. For each survey event, general information is recorded at the grid-cell level, including date, survey type (diurnal or nocturnal), weather conditions, survey duration, dominant habitat type, and list of observers. Each amphibian observation is then entered as an individual record linked to the corresponding grid cell and date. When species-level identification is uncertain, generic taxonomic categories (e.g. sp. or “undetermined”) are used, optionally accompanied by explanatory remarks. Aquatic habitats are digitized as polygons and described using standardized attributes (habitat type, estimated depth, permanence, presence of fish or crayfish). After field collection, data are exported, quality-checked, taxonomically harmonized using national reference lists, and structured into relational tables. Occurrence data are then transformed into Darwin Core format for publication through GBIF, ensuring interoperability and long-term accessibility.
Metadatos adicionales
| Agradecimientos | We would like to sincerely thank Maël Moulin and Lison Charlier for the quality of their internship work. A big thank you also goes to all the volunteers for their commitment and valuable contribution: Cyrielle Ballester, Soumaya Belghali, Christelle Beusquart, Léo Blondet, Tom Carli, Tom Chaubet, Guillaume Didier, Jordan Emerit, Marie Esquerre, Max François, Elodie Gazanion, Léo Gentile, Guy Lepinoy, Noé Lion, Bastien Macé, Titouan Montessuit, Valérie Peltrault, Agathe Pierre, Manon Skrypczuk, Elise Thiery, Félix Thirion, Sara Vasseur, Amandine Vellas, and Lucas Wesemann. Finally, we warmly thank our partners, UnisCité and the Montpellier Zoo, for their support and collaboration on this project. |
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| Identificadores alternativos | 9fd8ed05-3ae6-453a-878a-c0a272a2b849 |
| https://ipt.gbif.fr/resource?r=croa_cefe |