Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/143486
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Occurrence vs abundance models: Differences between species with varying aggregation patterns |
Autor: | Estrada, Alba CSIC ORCID; Arroyo, Beatriz CSIC ORCID | Palabras clave: | Circus cyaneus Favourability function Predictive models Montagu’s harrier Circus pygargus Hen harrier |
Fecha de publicación: | 2012 | Editor: | Elsevier | Citación: | Biological Conservation 152: 37-45 (2012) | Resumen: | Predicting distribution has become a fundamental component in conservation or wildlife management. Modelling is increasingly used to identify important areas (e.g., those areas more suitable for a species or more likely to hold high densities). Models often use presence/absence rather than abundance data, partly because measuring abundance is more difficult than measuring presence. We aimed to test if the relationship between occurrence models and predicted abundance varied for two sibling species that differ in the level of nest aggregation: the Montagu's harrier (a semi-colonial raptor species) and the hen harrier (more territorial). We modelled presence/absence distribution and the number of pairs of each species with GLM and large-scale environmental variables, and compared predicted results of both sets of models. In the case of the hen harrier, predictions of the presence/absence model reliably identified areas with highest densities for the species. In contrast, in the Montagu's harrier, there were large apparently favourable areas where predicted breeding density was low. Our results indicate that breeding system is likely to shape the relationship between presence/absence vs density models. In species that are randomly or evenly spaced, even if spatial variations in density occur, using results of presence/absence models is likely to be adequate for population monitoring. In contrast, in the case of semi-colonial species, it is necessary to take into account both occurrence and abundance models to identify areas of conservation importance or concern. There are a considerable number of birds which are semi-colonial or aggregated species, thus these results could have general implications. | Versión del editor: | http://dx.doi.org/10.1016/j.biocon.2012.03.031 | URI: | http://hdl.handle.net/10261/143486 | DOI: | 10.1016/j.biocon.2012.03.031 | Identificadores: | doi: 10.1016/j.biocon.2012.03.031 issn: 0006-3207 |
Aparece en las colecciones: | (IREC) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
aggregationpatterns.pdf | 281,63 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
36
checked on 21-abr-2024
WEB OF SCIENCETM
Citations
35
checked on 27-feb-2024
Page view(s)
348
checked on 24-abr-2024
Download(s)
1.645
checked on 24-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.