Integrated Publishing Toolkit(IPT)

free and open access to biodiversity data

Batumi Raptor Count (BRC) - Autumn migration data

Última versión Publicado por Batumi Raptor Count en Aug 28, 2019 Batumi Raptor Count

One of the most important geographical bottlenecks for migrating raptors in the east African-Palearctic migration system is situated between the easternmost tip of the Black Sea and the Lesser Caucasus, just north of Batumi, in the Republic of Georgia (Verhelst et al. 2011).

Since 2008 citizen scientists of the Batumi Raptor Count(BRC) monitor the autumn raptor passage daily from mid August till mid October, collecting also detailed information about the age and sex of focal species. These data are included in the BRC dataset. This dataset offers a unique baseline for monitoring the state of migrant raptor populations in the east African-Palearctic flyway in the 21st century.

Each season a large number of raptors are counted during the autumn migration count. The numbers fluctuate around the million individuals in each season. This dataset represent the data during the 2008-2017 seasons. A detailed description of the BRC migration count protocol, data management strategy, and the open access BRC dataset in GBIF are provided by Wehrmann et al. (2019). This dataset has been used to analyse changes in the abundance and demography of eight abundant raptor species at BRC between 2011-2017. The resulting research paper is currently in 2nd review and will be shared through this webpage immediately upon publication.

Registros

Los datos en este evento de muestreo recurso 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 611 registros. también existen 2 tablas de datos de extensiones. Un registro en una extensión provee información adicional sobre un registro en el core. El número de registros en cada tabla de datos de la extensión se ilustra a continuación.

  • Event (core)
    611
  • Occurrence 
    372352
  • ExtendedMeasurementOrFact 
    1333

Este IPT archiva los datos, sirviendo así como repositorio de datos. Los datos y metadatos están disponibles para descargar en la sección de descargas. La tabla de versiones muestra otras versiones del recurso que se han hecho accesibles al público y permite el seguimiento de los cambios hechos al recurso en el tiempo.

Descargas

Descargue la última versión de los datos como un Archivo Darwin Core (DwC-A) o los metadatos como EML o RTF:

Datos como un archivo DwC-A descargar 611 registros en Inglés (10 MB) - Frecuencia de actualización: annual
Metadatos como un archivo EML descargar en Inglés (17 KB)
Metadatos como un archivo RTF descargar en Inglés (16 KB)

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:

Wehrmann J, de Boer F, Benjumea R, Cavaillès S, Engelen D, Jansen J, Verhelst B, Creuwels JCS, Vansteelant WMG (2018): Batumi Raptor Count (BRC) - Autumn migration data. v1.2. Batumi Raptor Count. Dataset/Samplingevent. http://ipt.nlbif.nl/ipt/resource?r=brc-autumn_migration_counts&v=1.2

Derechos

Los usuarios deben respetar los siguientes derechos de uso:

El publicador y propietario de los derechos de este trabajo es Batumi Raptor Count. To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction.

Registro GBIF

Este recurso ha sido registrado en GBIF con el siguiente UUID: d19c0287-15ee-45fd-b810-d30e8026a785.  Batumi Raptor Count publica este recurso, y está registrado en GBIF como un publicador de datos avalado por Netherlands Biodiversity Information Facility.

Palabras Clave

Occurrence; Autumn migration; raptor; African-Palearctic flyway; monitoring

Contactos

¿Quién creó el recurso?:

Jasper Wehrmann
BRC Foundation Hannah Arendtweg 84 1349CM Almere NL
http://www.batumiraptorcount.org
Folkert de Boer
BRC Foundation Hannah Arendtweg 84 1349CM Almere NL
Wouter Vansteelant
BRC Foundation Hannah Arendtweg 84 1349CM Almere NL
Jeroen Creuwels
Data manager NLBIF
Naturalis PO Box 9517 NL-2300 RA Leiden NL +31 71 7519336
https://www.nlbif.nl

¿Quién puede resolver dudas acerca del recurso?:

Jasper Wehrmann
Folkert de Boer
BRC Foundation Hannah Arendtweg 84 1349CM Almere NL

¿Quién documentó los metadatos?:

BRC Foundation
BRC Foundation Dijkgraaf 35 6721 NJ Bennekom NL
http://www.batumiraptorcount.org

¿Quién más está asociado con el recurso?:

Procesador
Niels Raes
Node manager NLBIF
NLBIF PO Box 9517 NL-2300 RA Leiden NL +31 71 7519362
https://www.nlbif.nl/
Frank de Miranda
Voorzitter
Stichting DuGof IJskelderlaan 3 3941 HS DOORN NL
http://dugof.nl/

Cobertura Geográfica

The bottleneck is situated at the narrowest point between the eastern coast of the Black Sea and the foothills of the Lesser Caucasus, just to the north of the city of Batumi, in the Republic of Georgia.

Coordenadas límite Latitud Mínima Longitud Mínima [41.684, 41.699], Latitud Máxima Longitud Máxima [41.688, 41.802]

Cobertura Taxonómica

Soaring birds and few others such as Roller

Orden  Accipitriformes (Raptors)
Especie  Coracias garrulus (European Roller),  Streptopelia turtur (European turtle dove),  Ciconia ciconia (White Stork),  Ciconia nigra (Black Stork)

Cobertura Temporal

Periodo de Formación mid Aug to mid Oct annually from 2008 till present.

Datos del Proyecto

Since 2008 citizen scientists of the Batumi Raptor Count(BRC) monitor the autumn raptor passage daily from mid August till mid October, collecting also detailed information about the age and sex of focal species. Counts are focused on high-quality data for monitoring of target species, and for which species we can provide high-quality data useful for trend analyses.

Título Batumi Raptor Counts - Autumn migration data
Fuentes de Financiación NLBIF partly funded publication and processing of the BRC dataset to GBIF
Descripción del Área de Estudio The two count stations are located on hilltops with unobstructed view facing north into the landscape, and within visible range from each other. Locations are the villages Sakhalvasho and Shuamta, North of Batumi, in the Republic of Georgia, between the easternmost tip of the Black Sea and the Lesser Caucasus.
Descripción del Diseño Migration counts are performed simultaneously from two count stations to cover the approximately 12km long transect line.

Personas asociadas al proyecto:

Punto de Contacto
Jasper Wehrman

Métodos de Muestreo

Daily counts from 17st August till 16st October. The daily count period starts at one hour after sunrise and ends two hours before sunset. Counts consisted of continuous monitoring during the count period and recording all occurrences.

Área de Estudio The villages Sakhalvasho and Shuamta, North of Batumi, in the Republic of Georgia.
Control de Calidad Counts are conducted by experienced and less experienced bird-watchers that volunteer to count at least two weeks. Count-coordinators screen, select and schedule volunteers such that each station can be staffed by a team consisting of one coordinator and 6 to 12 counters, depending on migration intensity, diversity and also counter availability. We try to enter records always immediately to enable the double count detection in later phase. Digital photography has become an important tool to aid identification of easily confused species.

Descripción de la metodología paso a paso:

  1. At the end of each day count-coordinators go through the records to check for major errors (using simple criteria such as large flocks of rare birds, or specific age and sex combinations), and where possible correct them by discussing these observations with their daily count team. Observations that are suspect due to insufficient information (for example, a large eagle cannot be identified without being aged) are degraded to a less specific level (large eagle spec.).
  2. At the end of each season the data is verified with an automated script in the open source R software (R Core Team 2017) that validates each single record, ensures count protocol integrity and changes the identification of the species-level of those records with insufficient information.
  3. An important final step in the production of the NLBIF data product is to detect all double counts in the overlapping count zones between the two stations. An automated procedure written in R detects potential double counts in different spatial and temporal windows for different species.

Referencias Bibliográficas

  1. Wehrmann J, de Boer F, Benjumea R, Cavaillès S, Engelen D, Jansen J, Verhelst B, Vansteelant WMG (2019) Batumi Raptor Count: autumn raptor migration count data from the Batumi bottleneck, Republic of Georgia. ZooKeys 836: 135-157. https://doi.org/10.3897/zookeys.836.29252
  2. Verhelst B, Jansen J, Vansteelant WMG (2011) South West Georgia: an important bottleneck for raptor migration during autumn. Ardea 99: 137–146. https://doi.org/10.5253/078.099.0203

Metadatos Adicionales

Information about killed and injured birds during the Autumn raptor monitoring is given in the extension ExtendedMeasurementOrFact. Due to a technical error (which is under review at GBIF) this extension does not automatically link data in this extension with the occurrence dataset. Therefore these data will not be shown at the GBIF portal. However, these data can be retrieved from DwCA in the file "extendedmeasurementorfact.txt".

Propósito Monitoring the abundance, demography and timing of migrant raptors and selected threatened species in the East African-Palearctic flyway. In addition the data collected may be useful for studying the influence of weather on diel and seasonal migration dynamics of soaring birds.
Descripción de mantenimiento Dataset is annually maintained.
Identificadores Alternativos d19c0287-15ee-45fd-b810-d30e8026a785
http://ipt.nlbif.nl/ipt/resource?r=brc-autumn_migration_counts