Search results for "endemic"

Concordancia entre observadores en la detección por palpación de bocio en población escolar de 6 a 14 años

2009

Mª José López García (Maria.J.Lopez-Garcia@uv.es) Fundamento: Estimar la concordancia entre observadores en la detección de bocio por palpación manual en la población escolar. Métodos. Durante un periodo de 5 meses durante el curso escolar 2001/2002 se estudió la presencia de bocio en una muestra representativa de 845 escolares de 6 a 14 años de 18 colegios de una Área de Salud de la Comunidad Valenciana. La exploración fue realizada de forma enmascarada por dos observadores (siempre los mismos). El tamaño tiroideo se estableció en seis grados (OA, OB, I, II, III y IV). Se consideró bocio a partir del grado OB inclusive. La concordancia se valoró en relación a variables como edad, sexo, mas…

Euphosantianane E–G: Three New Premyrsinane Type Diterpenoids from Euphorbia sanctae-catharinae with Contribution to Chemotaxonomy

2019

Euphorbia species were widely used in traditional medicines for the treatment of several diseases. From the aerial parts of Egyptian endemic plant, Euphorbia sanctae-catharinae, three new premyrsinane diterpenoids, namely, euphosantianane E&ndash

Physiological,anatomical and biomass partitioning responses to ozone in the Mediterranean endemic plant Lamottea dianae

2011

Ozone effects on the perennial forb Lamottea dianae were studied in an open-top chamber experiment. Ozone was found to induce reductions in CO 2 assimilation and water use efficiency in the leaves of this species. These reductions were mainly related to a decline in the in vivo CO 2 fixation capacity of Rubisco (V c,max), rather than to stomatal limitations or photoinhibitory damage (F v:F m). In addition to chloroplast degeneration, other observed effects were callose accumulation, formation of pectinaceous wart-like cell wall exudates and phloem alterations. Moreover, ozone exposure significantly reduced root dry biomass. The possible relevance of these adverse effects for Mediterranean f…

Flora italiana di interesse comunitario: risultati del IV Report e Piano nazionale di monitoraggio

2020

I popolamenti faunistici pleistocenici della Sicilia.

2008

Pleistocene Calabrian and Sicilian bioprovinces

2002

During the Pleistocene, southern Calabria was the area through which several mammalian taxa dispersed into the Sicilian island via the Straits of Messina. The rich fossil record of Sicily allowed for the construction of a fairly detailed bio-chronological frame that is dated by correlation of vertebrate bearing deposits with marine deposits. At present five Faunal Complexes (F.C.), characterised by the occurrence of different taxa, have been recognised. The two older Faunal Complexes (Monte Pellegrino F.C.'xes Elephas falconeri F.C.) include taxa with differently marked endemic features denoting the occurrence of an insular system made up of geographically isolated small islands, with very …

Pylogenetic history and biogeographic aspects of fossil and extant Terricola (Mammalia, Rodentia) of Southern Italy: a case study

2009

Assessing Effects of Temperature Change on Four Limonium Species from Threatened Mediterranean Salt-Affected Habitats

2018

[EN] Evaluation of tolerance to temperatures in the germination stage is an important tool to foresee the possible effect of global warming. Moreover, establishing germination protocols for endemic and threatened species is most interesting for restoration and management plans that focus on habitat conservation. Seed germination was analysed in four species of the genus Limonium (L. virgatum, L. narbonense, L. girardianum and L. santapolense) growing in two saline habitats on the eastern coast of the Iberian Peninsula. The study aim was to compare responses of seed germination to different temperature regimes. Seeds were collected in two protected areas, `L¿Albufera de Valencia¿ (province o…

Seed germination reports of high mountain species native to Mount Etna (Sicily)

2020

The germination ability of five endemic species from the high mountain belt of Mt. Etna were studied; they are Astragalus siculus, Erysimum etnense, Senecio squalidus subsp. aethnensis, Silene italica subsp. sicula, and Tanacetum vulgare subsp. siculum. Mature seeds were collected in the field, within an elevation range of 1700–2000 m a.s.l. Different experimental conditions were tested and the best methods with optimal germination results are provided and compared for each species. First germination records are given for 4 out of 5 of the investigated taxa.

In vitro propagation of Lithodora rosmarinifolia (Ten.) Johnst., a rare endemic Sicilian shrub with potential as ornamental plant.

2007

Lithodora rosmarinifolia is a rare shrub endemic to the Mediterranean island of Sicily and its minor islands. Propagation of Lithodora rosmarinifolia by standard methods is difficult due to erratic seed production and low percentage of rooted cuttings. As the plant is suited for domestication, the possibility of establishing an efficient in vitro technique for propagation and conservation of this threatened species was investigated. Nodal segments from shoot tips were used as primary explants to establish in vitro culture. A 2 X 5 factorial experiment with five concentrations (0 to 17.74 mM) of N6-benzyladenine (BA) and two concentrations (0 and 2.46 mM) of indole-3-butyric acid (IBA) was u…