Model-based geomorphology of Malpelo Island and spatial distribution of breeding seabirds
The spatial distribution of seabird nests present on Malpelo Island, the main characteristics of the islandʼs topography, and the types of substratum available for nesting were addressed using a Digital Elevation Model (DEM). The model is based on data from remote sensors (satellite images, aerial photography and panoramic photography), and from field data processed through a geographical information system. The nests of Sula granti prevail on the surfaces of Malpelo Island and neighboring islets, while those of the remaining species (S. sula, Creagrus furcatus, Anous stolidus, A. minutus and Gygis alba) are spatially restricted to the cliff margins and to crevices or caverns at different heights. The presence of terrestrial predators and predatory birds (Fregata spp.) seems to mainly explain the marginal distribution of other breeding species. The cartographic data presented here differ significantly from past and current representations, especially those concerning the islandʼs emerged surface and other geomorphologic features. This new cartographical information will support future studies on the terrestrial fauna and flora of Malpelo Island and its islets.
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Format: | Journal Contribution biblioteca |
Language: | English |
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INVEMAR, Santa Marta, Colombia
2006
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Subjects: | Geographical distribution, Marine birds, Nests, |
Online Access: | http://hdl.handle.net/1834/1970 |
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dig-aquadocs-1834-19702021-05-19T06:32:48Z Model-based geomorphology of Malpelo Island and spatial distribution of breeding seabirds Modelación geomorfológica de la Isla Malpelo y distribución espacial de aves marinas anidantes López-Victoria, M. Rozo, D.M. Geographical distribution Marine birds Nests Geographical distribution The spatial distribution of seabird nests present on Malpelo Island, the main characteristics of the islandʼs topography, and the types of substratum available for nesting were addressed using a Digital Elevation Model (DEM). The model is based on data from remote sensors (satellite images, aerial photography and panoramic photography), and from field data processed through a geographical information system. The nests of Sula granti prevail on the surfaces of Malpelo Island and neighboring islets, while those of the remaining species (S. sula, Creagrus furcatus, Anous stolidus, A. minutus and Gygis alba) are spatially restricted to the cliff margins and to crevices or caverns at different heights. The presence of terrestrial predators and predatory birds (Fregata spp.) seems to mainly explain the marginal distribution of other breeding species. The cartographic data presented here differ significantly from past and current representations, especially those concerning the islandʼs emerged surface and other geomorphologic features. This new cartographical information will support future studies on the terrestrial fauna and flora of Malpelo Island and its islets. Published Seabirds, Nest distribution, Digital Elevation Model 2007-10-22T08:39:19Z 2007-10-22T08:39:19Z 2006 Journal Contribution Boletín de investigaciones marinas y costeras, 35. p. 111-131 0122-9761 http://hdl.handle.net/1834/1970 en http://www.invemar.org.co/siad/descarga.jsp?type=documento&id=453 Malpelo island Colombia INVEMAR, Santa Marta, Colombia |
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Geographical distribution Marine birds Nests Geographical distribution Geographical distribution Marine birds Nests Geographical distribution |
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Geographical distribution Marine birds Nests Geographical distribution Geographical distribution Marine birds Nests Geographical distribution López-Victoria, M. Rozo, D.M. Model-based geomorphology of Malpelo Island and spatial distribution of breeding seabirds |
description |
The spatial distribution of seabird nests present on Malpelo Island, the main characteristics of the islandʼs topography, and the types of substratum available for nesting were addressed using a Digital Elevation Model (DEM). The model is based on data from remote sensors (satellite images, aerial photography and panoramic photography), and from field data processed through a geographical information system. The nests of Sula granti prevail on the surfaces of Malpelo Island and neighboring islets, while those of the remaining species (S. sula, Creagrus furcatus, Anous stolidus, A. minutus and Gygis alba) are spatially restricted to the cliff margins and to crevices or caverns at different heights. The presence of terrestrial predators and predatory birds (Fregata spp.) seems to mainly explain the marginal distribution of other breeding species. The cartographic data presented here differ significantly from past and current representations, especially those concerning the islandʼs emerged surface and other geomorphologic features. This new cartographical information will support future studies on the terrestrial fauna and flora of Malpelo Island and its islets. |
format |
Journal Contribution |
topic_facet |
Geographical distribution Marine birds Nests Geographical distribution |
author |
López-Victoria, M. Rozo, D.M. |
author_facet |
López-Victoria, M. Rozo, D.M. |
author_sort |
López-Victoria, M. |
title |
Model-based geomorphology of Malpelo Island and spatial distribution of breeding seabirds |
title_short |
Model-based geomorphology of Malpelo Island and spatial distribution of breeding seabirds |
title_full |
Model-based geomorphology of Malpelo Island and spatial distribution of breeding seabirds |
title_fullStr |
Model-based geomorphology of Malpelo Island and spatial distribution of breeding seabirds |
title_full_unstemmed |
Model-based geomorphology of Malpelo Island and spatial distribution of breeding seabirds |
title_sort |
model-based geomorphology of malpelo island and spatial distribution of breeding seabirds |
publisher |
INVEMAR, Santa Marta, Colombia |
publishDate |
2006 |
url |
http://hdl.handle.net/1834/1970 |
work_keys_str_mv |
AT lopezvictoriam modelbasedgeomorphologyofmalpeloislandandspatialdistributionofbreedingseabirds AT rozodm modelbasedgeomorphologyofmalpeloislandandspatialdistributionofbreedingseabirds AT lopezvictoriam modelaciongeomorfologicadelaislamalpeloydistribucionespacialdeavesmarinasanidantes AT rozodm modelaciongeomorfologicadelaislamalpeloydistribucionespacialdeavesmarinasanidantes |
_version_ |
1756075706263011328 |