Dataset.
Gulls contribute to olive seed dispersal within and among islands in a Mediterranean coastal area [Dataset]
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/361474
Digital.CSIC. Repositorio Institucional del CSIC
- Ando, Haruko
- Martín-Vélez, Víctor
- Tavecchia, Giacomo
- Traveset, Anna
- Jiménez-Martín, Iciar
- Igual, José Manuel
- Martínez-Abraín, Alejandro
- Hervías-Parejo, Sandra
The data contains GPS locations of 20 individuals of yellow-legged gulls Larus michahellis and other parameters which were used to develop the seed dispersal models in this study., [Description of the Data and file structure] This is a csv file available for R packages used in this study. Parameter list:
fid: ID of each GPS point
location.long: Longitude of each GPS point
location.lat: Latitude of each GPS point
individual.local.identifier: ID of gull individual tags
Body.weight: Body weight of gulls (g)
study.local.timestamp: Timestamp of GPS positioning (yyyy/mm/dd hh:mm:ss)
Wild.olive.distribution: Presence (1) or absence (0) of wild olive vegetation in each GPS point
Night.stay: Nighttime GPS positioning (1) and daytime positioning (0)
Year: Year of data collection
individual_id: Individual ID separated by years
dist: Distances from the previous GPS point (m)
timediff: Time difference from the previous GPS point (s)
speed: Gulls' speed s/h at each GPS point (m/s)
inland: GPS position inland (1) or sea (0)
ID_LOC: Land use ID of CORINE Land Cover 2018
islands: Name of islands in each GPS point
Missing data is shown as "NA"., Aim: To analyse the role of non-frugivorous birds on seed dispersal, seed dispersal by gulls is expected to be especially instrumental in island ecosystems, as these have a smaller subset of frugivores when compared to the mainland, and because long-distance dispersal is required for plant colonization. Here we investigated the seed dispersal of olives by gulls among ten islands of the same archipelago to reveal if gulls contribute to long-distance seed dispersal including different islands, and how gulls’ adaptation to domestic olives and individual differences in foraging activities affect their seed dispersal pattern., Location: Balearic Islands in the Western Mediterranean Sea, Spain, Taxon: Yellow-legged gulls ( Larus michahellis), Domestic and wild Olives ( Olea europaea and O. europaea var. sylvestris), Methods: We developed seed dispersal models of the two ecotypes of olives dispersed by gulls across an archipelago, based on GPS tracking data, gut passage time, and seed viability., Results: Mean dispersal distances were 7.67 (±12.48) km in wild and 12.57 (±13.08) km in domestic olives. Seven-point one percent of wild and 8.5% of domestic olives were dispersed among islands. Among these, 8.2% of domestic seeds were transported from large to small islands where gull colonies are located, whereas wild olives were dispersed in more variable directions. Such dispersal pattern of two olive ecotypes were consistent despite the differences in dispersal distances among individuals., Main conclusions: Gulls contributed to long-distance olive seed dispersal including different islands. The seed dispersal of domestic olives to longer distances with specific directions may facilitate colonization and expansion of that variant if the conditions of seed deposition sites are suitable. Our findings indicate that gulls are relevant vectors for long-distance dispersal of large fleshy fruits in island ecosystems where specialist large frugivores are absent., Peer reviewed
DOI: http://hdl.handle.net/10261/361474
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/361474
HANDLE: http://hdl.handle.net/10261/361474
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/361474
Ver en: http://hdl.handle.net/10261/361474
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/361474
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1 Documentos relacionados
1 Documentos relacionados
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/361235
Artículo científico (article). 2024
GULLS CONTRIBUTE TO OLIVE SEED DISPERSAL WITHIN AND AMONG ISLANDS IN A MEDITERRANEAN COASTAL AREA
Digital.CSIC. Repositorio Institucional del CSIC
- Ando, Haruko
- Martín-Vélez, Víctor
- Tavecchia, Giacomo
- Traveset, Anna
- Jiménez-Martín, Iciar
- Igual, José Manuel
- Martínez-Abraín, Alejandro
- Hervías-Parejo, Sandra
[Aim] To analyse the role of non-frugivorous birds on seed dispersal, seed dispersal by gulls is expected to be especially instrumental in island ecosystems, as these have a smaller subset of frugivores when compared to the mainland, and because long-distance dispersal is required for plant colonisation. Here, we investigated the seed dispersal of olives by gulls among 10 islands of the same archipelago to reveal if gulls contribute to long-distance seed dispersal including different islands, and how gulls' adaptation to domestic olives and individual differences in foraging activities affect their seed dispersal pattern., [Location] Balearic Islands in the Western Mediterranean Sea, Spain., [Taxon] Yellow-legged gulls (Larus michahellis), Domestic and wild Olives (Olea europaea and O. europaea var. sylvestris)., [Methods] We developed seed dispersal models of the two ecotypes of olives dispersed by gulls across an archipelago, based on GPS tracking data, gut passage time and seed viability., [Results] Mean dispersal distances were 7.67 (±12.48) km in wild and 12.57 (±13.08) km in domestic olives. 7.1% of wild and 8.5% of domestic olives were dispersed among islands. Among these, 8.2% of domestic seeds were transported from large to small islands where gull colonies are located, whereas wild olives were dispersed in more variable directions. Such dispersal pattern of two olive ecotypes was consistent despite the differences in dispersal distances among individuals., [Main Conclusions] Gulls contributed to long-distance olive seed dispersal including different islands. The seed dispersal of domestic olives to longer distances with specific directions may facilitate colonisation and expansion of that variant if the conditions of seed deposition sites are suitable. Our findings indicate that gulls are relevant vectors for long-distance dispersal of large fleshy fruits in island ecosystems where specialist large frugivores are absent., Gull monitoring was partially funded by the CGL2017-85210-P project from the Spanish Government (EUFEDER funds). We thank ‘Parque Natural de Sa Dragonera’ for their help with logistics and granting the permission to monitor and capture gulls, the Cabrera National Park for their support and permission to collect gull pellets and fruits (CGL2017-88122-P) and ‘Centro de Estudio y Protección del Medio Natural La Granja’ (Valencia) for allowing us to perform seed retention experiments. We thank CEIP Son Oliva and the Institute La Salle for their support in capturing gulls in Palma city. Many thanks go to the Conselleria de Medi Ambient of the Balearic Government for their permission to capture and mark gulls at different sites., Peer reviewed
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1 Versiones
1 Versiones
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/361474
Dataset. 2023
GULLS CONTRIBUTE TO OLIVE SEED DISPERSAL WITHIN AND AMONG ISLANDS IN A MEDITERRANEAN COASTAL AREA [DATASET]
Digital.CSIC. Repositorio Institucional del CSIC
- Ando, Haruko
- Martín-Vélez, Víctor
- Tavecchia, Giacomo
- Traveset, Anna
- Jiménez-Martín, Iciar
- Igual, José Manuel
- Martínez-Abraín, Alejandro
- Hervías-Parejo, Sandra
The data contains GPS locations of 20 individuals of yellow-legged gulls Larus michahellis and other parameters which were used to develop the seed dispersal models in this study., [Description of the Data and file structure] This is a csv file available for R packages used in this study. Parameter list:
fid: ID of each GPS point
location.long: Longitude of each GPS point
location.lat: Latitude of each GPS point
individual.local.identifier: ID of gull individual tags
Body.weight: Body weight of gulls (g)
study.local.timestamp: Timestamp of GPS positioning (yyyy/mm/dd hh:mm:ss)
Wild.olive.distribution: Presence (1) or absence (0) of wild olive vegetation in each GPS point
Night.stay: Nighttime GPS positioning (1) and daytime positioning (0)
Year: Year of data collection
individual_id: Individual ID separated by years
dist: Distances from the previous GPS point (m)
timediff: Time difference from the previous GPS point (s)
speed: Gulls' speed s/h at each GPS point (m/s)
inland: GPS position inland (1) or sea (0)
ID_LOC: Land use ID of CORINE Land Cover 2018
islands: Name of islands in each GPS point
Missing data is shown as "NA"., Aim: To analyse the role of non-frugivorous birds on seed dispersal, seed dispersal by gulls is expected to be especially instrumental in island ecosystems, as these have a smaller subset of frugivores when compared to the mainland, and because long-distance dispersal is required for plant colonization. Here we investigated the seed dispersal of olives by gulls among ten islands of the same archipelago to reveal if gulls contribute to long-distance seed dispersal including different islands, and how gulls’ adaptation to domestic olives and individual differences in foraging activities affect their seed dispersal pattern., Location: Balearic Islands in the Western Mediterranean Sea, Spain, Taxon: Yellow-legged gulls ( Larus michahellis), Domestic and wild Olives ( Olea europaea and O. europaea var. sylvestris), Methods: We developed seed dispersal models of the two ecotypes of olives dispersed by gulls across an archipelago, based on GPS tracking data, gut passage time, and seed viability., Results: Mean dispersal distances were 7.67 (±12.48) km in wild and 12.57 (±13.08) km in domestic olives. Seven-point one percent of wild and 8.5% of domestic olives were dispersed among islands. Among these, 8.2% of domestic seeds were transported from large to small islands where gull colonies are located, whereas wild olives were dispersed in more variable directions. Such dispersal pattern of two olive ecotypes were consistent despite the differences in dispersal distances among individuals., Main conclusions: Gulls contributed to long-distance olive seed dispersal including different islands. The seed dispersal of domestic olives to longer distances with specific directions may facilitate colonization and expansion of that variant if the conditions of seed deposition sites are suitable. Our findings indicate that gulls are relevant vectors for long-distance dispersal of large fleshy fruits in island ecosystems where specialist large frugivores are absent., Peer reviewed
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