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1

The key role of a Ring Ouzel Tardus torquatus wintering population in seed dispersal of the endangered endemic Juniperus cedrus in an insular environment

100%
Rumeu B., Padilla D. P., Nogales M.
Acta Ornithologica
|
2009
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tom 44
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nr 2
Although the Ring Ouzel has been considered accidental in the Canary Islands, it has been observed for the last five years in the high mountain zone of Tenerife (Canary Islands), showing it to be a regular winter visitor. Its interaction with female Juniperus cedrus cones and seeds was studied by analysing its wintering diet during January-April 2008. This juniper is endemic to the Canaries and Madeira and is classified as endangered by the IUCN. Previously, its sole long-distance disperser was known to be the Raven Corvus corax, which is unfortunately now extinct in the distribution range of J. cedrus. The results show that the diet of T. torquatus in Tenerife consists mostly of female J. cedrus cones (95% of the biomass consumed). Due to the large amount of seeds dispersed by Ring Ouzels and the effectiveness in seed germination, this winter visitor constitutes an important vector in the dispersal of J. cedrus that appears to have gone undetected in the past. This passerine plays a key role in its seed dispersal system, being able to move seeds over long distances, thus connecting fragmented populations of this plant. The present work is one of the few cases described in which a plant endemic to an oceanic island is so dependent on a winter visitor, and highlights the importance of insular environments in the wintering range of the Ring Ouzel. Owing to the absence of native long-distance seed dispersers, the future fate of this conifer is now probably dependent on the wintering population of this thrush.
2
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Evaluation of Acanthamoeba isolates from environmental sources in Tenerife, Canary Islands, Spain

100%
Lorenzo-Morales J., Monteverde-Miranda C. A., Jimenez C., Tejedor M. L., Valladares B., Ortega-Rivas A.
Annals of Agricultural and Environmental Medicine
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2005
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tom 12
|
nr 2
233-236
Tests for potentially pathogenic amoebae were carried out in order to determine the presence of free-living amoebae of genus Acanthamoeba in soil and beach sand sources related to human environments in Tenerife, Canary Islands, Spain. Acanthamoeba identification was based on the morphology of cyst and trophozoite forms and PCR amplification with a genus specific primer pair. The pathogenical potential of Acanthamoeba isolates was characterized by temperature and osmotolerance assays and PCR reactions with two primer pairs related to Acanthamoeba pathogenesis. The results demonstrate the presence of potential pathogenic strain in both sources. Thus, some of the amoebae found in these habitats could act as opportunistic pathogens and may present a risk to human health.
3

Prey size selection of insular lizards by two sympatric predatory bird species

80%
Padilla D. P., Nogales M., Marrero P.
Acta Ornithologica
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2007
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tom 42
|
nr 2
167-172
4

Soil ciliates from Saudi Arabia, including descriptions of two new genera and six new species

80%
Foissner W., Quintela-Alonso P., Al-Rasheid K.
Acta Protozoologica
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2008
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tom 47
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nr 4
317-352
5

Breeding biology of Grey Wagtail Motacilla cinerea canariensis on Tenerife, Canary Islands

80%
Rodriguez B., Rodriguez A.
Acta Ornithologica
|
2007
|
tom 42
|
nr 2
195-199
6

Isolation and molecular identification of vahlkampfiid amoebae from an Island [Tenerife, Spain]

80%
De Jonckheere J. F.
Acta Protozoologica
|
2006
|
tom 45
|
nr 1
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