Description
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
Enregistrements de données
Les données de cette ressource occurrence ont été publiées sous forme d'une Archive Darwin Core (Darwin Core Archive ou DwC-A), le format standard pour partager des données de biodiversité en tant qu'ensemble d'un ou plusieurs tableurs de données. Le tableur de données du cœur de standard (core) contient 112 enregistrements.
Cet IPT archive les données et sert donc de dépôt de données. Les données et métadonnées de la ressource sont disponibles pour téléchargement dans la section téléchargements. Le tableau des versions liste les autres versions de chaque ressource rendues disponibles de façon publique et permet de tracer les modifications apportées à la ressource au fil du temps.
Versions
Le tableau ci-dessous n'affiche que les versions publiées de la ressource accessibles publiquement.
Comment citer
Les chercheurs doivent citer cette ressource comme suit:
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
Droits
Les chercheurs doivent respecter la déclaration de droits suivante:
L’éditeur et détenteur des droits de cette ressource est Centre d’Ecologie Fonctionnelle & Evolutive (CEFE). Ce travail est sous licence Creative Commons Attribution (CC-BY) 4.0.
Enregistrement GBIF
Cette ressource a été enregistrée sur le portail GBIF, et possède l'UUID GBIF suivante : 9fd8ed05-3ae6-453a-878a-c0a272a2b849. Centre d’Ecologie Fonctionnelle & Evolutive (CEFE) publie cette ressource, et est enregistré dans le GBIF comme éditeur de données avec l'approbation du GBIF France.
Mots-clé
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
Contacts
https://orcid.org/https://orcid.org/0000-0002-8780-767X
- Créateur ●
- Personne De Contact
Couverture géographique
N/A
| Enveloppe géographique | Sud Ouest [43,624, 3,822], Nord Est [43,664, 3,888] |
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Données sur le projet
Pas de description disponible
| Titre | CROA Project: Amphibians in Urban Environments (CEFE) |
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Les personnes impliquées dans le projet:
Méthodes d'échantillonnage
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.
| Etendue de l'étude | 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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Description des étapes de la méthode:
- 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.
Métadonnées additionnelles
| Remerciements | 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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| Identifiants alternatifs | 9fd8ed05-3ae6-453a-878a-c0a272a2b849 |
| https://ipt.gbif.fr/resource?r=croa_cefe |