Seguiment i valoració de l'aplicació de les TIC en dos centres de secundària de Ciutadella de Menorca

El motiu d'aquest pràcticum és fer el seguiment i la valoració de la introducció de les TIC en dos IES en el marc del projecte Xarxipèlag de les Illes Balears. Es tracta de veure de quina manera els docents han integrat o no l'ús de les TIC a les seves aules, així com també la incidència de la formació rebuda.

Estudi de la connectivitat de l’illa de Menorca

Com a objectius generals: Analitzar la connectivitat ecològica a nivell paisatgístic de Menorca a partir d’una diagnosi que permeti determinar els espais d’interès connector i els punts crítics. Desenvolupar un pla d’acció amb propostes per millorar la connectivitat actual. Objectius específics: Aplicar una metodologia capaç de parametritzar els diferents conceptes relacionats amb la connectivitat ecològica i que sigui aplicable en la planificació territorial. Identificar els espais i elements d’interès per a la correcta circulació dels fluxos ecològics (flora i fauna) i socials, clau pel manteniment del paisatge i de la connectivitat funcional, definint connectors fluvials, espais naturals protegits, matrius (forestal, agrícola i urbana), unitats paisatgístiques, patrimoni arquitectònic i arqueològic, senders i camins ramaders, etc. que permetin determinar Espais o Elements d’Interès Estratègic per a la Connectivitat (EIEC). Definir els punts clau per a la connectivitat i identificar els punts crítics, on les barreres i els elements de fragmentació (carreteres, torrents, sòl urbà, etc.) intercepten els EIEC

Effects of recreational fishing on three fish species from the Posidonia oceanica meadows off Minorca (Balearic archipelago, western Mediterranean)

Experimental fishing and visual censuses were conducted at nine Posidonia oceanica sites off Minorca exposed to different levels of fishing intensity to assess the effects of recreational fishing on the species that dominate the catch. Total catch per unit effort (CPUE) was highly seasonal and a statistically significant interaction term existed between the season and the level of fishing intensity. CPUE decreased everywhere at the end of the fishing season (autumn), but such a reduction was more intense at those sites exposed to the highest level of fishing. Visual censuses confirmed that there was a lower abundance of vulnerable fish in autumn. Differences vanished in spring probably because fish reshuffled between the considered sites throughout the winter, when the level of fishing intensity was extremely low. Although the average total lengths of Serranus scriba and Diplodus annularis were unaffected by the level of fishing intensity, the average total length of Coris julis was smaller at the most heavily fished sites. In conclusion, recreational fishing has a relevant impact on most of the exploited species and some of the seasonality reported for the Posidonia oceanica fish assemblages might be caused by the seasonality of the fishery.

Macromicets de l'illa de Menorca.II.

Donem a conèixer els resultats de les prospeccions micològiques realitzades a Menorca entre els anys 1980 i 1988, i els presentem en forma de catàleg. S'han estudiat 193 tàxons (10 Ascomycetes i 183 Basidiomycetes), dels quals 127 creiem corresponen a citacions noves per a l'illa, entre els quals destaquem: Agaricus pequinii (Boud.) Konr. & Maubl., Amanita boudieri Barla, Dermoloma pseudocuneifolium Henrink, Hebeloma sarcophyllum (Peck) Sacc., Inocybe tenebrosa Quél., Psathyrella ammophila (Dur. & Lev.) Orton, Lactarius cistophilus Bon & Trimb. Russula seperina Dupain i Battarraea phalloides (Dicks.) Pers

Aportacion al catalogo micologico de Menorca

Se presenta un catálogo micológico de cerca de 60 especies de Agaricales, principalmente terrícolas, recolectados en la isla de Menorca durante las campañas de exploración llevadas a cabo en Noviembre de los años 1978 y 1980.

Les pintures murals de la basílica paleocristiana de «Es Cap des Port» (Fornells, Menorca): materials i tècniques

[cat]El present treball ofereix una revisió de les pintures murals de la basílica de «Es Cap des Port» (Fornells, Menorca), així com un estudi de caracterització arqueomètrica deIs materials i tècniques per microscòpia òptica, tant amb lupa binocular com amb microscopi petrogràfic mitjançant làmina prima, difracció de raigs X i microscòpia electrònica de rastreig. Els resultats han permès identificar els pigments emprats, així com la seva tècnica d'aplicació. Igualment, han permès caracteritzar els morters i han desvelat l' existència de dos tipus diferents de suport. Malgrat aquestes diferències en els morters, els pigments són sempre els mateixos per a tots els conjunts pictòrics caracteritzats [eng] The present paper offers a revision of the wall paintings found at the early Christian church of 'Es Cap des Port' (Fornells, Menorca). Moreover, the materials and techniques employed have been archaeometrically studied by means of optical microscopy, both with steromicroscope and petrographic microscope by thin section, X-ray diffraction and scanning electron microscopy. The results enable to identify the pigments used, as well as the techniques of application. It has also been possible to characterize the mortars, revealing the existence of two different types of support. In spite of these differences in the mortars, the pigments used are the same ones for all the studied wall paintings

Habitat selection by grey mullets (Osteichthyes: Mugilidae) in Mediterranean estuaries: the role of salinity.

A stratified study of microhabitat use by grey mullet on the island of Minorca (Balearic archipelago, western Mediterranean) showed that the distribution of all the species was dramatically affected by salinity. Sites with a salinity level under 15 were positively selected in spring and summer by those species whose growth performance was the best in oligomesohaline water (Liza ramado and Mugil cephalus) but also by a species whose growth was not affected by salinity (Chelon labrosus). Liza aurata concentrated in polyhaline and euhaline sites, where growth was improved, a pattern also exhibited by Liza saliens. Both species avoided fresh water sites all year round. As a consequence, community structure was correlated with salinity. The above reported electivity patterns often disappeared in autumn, when most grey mullets migrate off-shore.

Los sedimentos de la plataforma continental balear

El análisis sedimentológico de distintos sectores de la plataforma continental balear (Bahia de Campos, Sur de Menorca y Canal de Menorca) ha puesto de manifiesto la existencia de siete grupos de facies: A) algales, B) de bivalvos, C) de gasterpodos, D) bioclsticas, E) mixtas, F) de fragmentos liticos y G) cementadas (costras algales y calcarenitas). La distribución de estas facies sedimentarias guarda una estrecha relación con la profundidad, excepto en el Sur de Menorca, y con las comunidades bentónicas que se desarrollan en la plataforma continental. Las facies que recubren actualmente la plataforma balear se depositaron durante la fase del ascenso del nivel del mar de la transgresión Versiliense.

Spatial distribution and biomass of aquatic rooted macrophytes and their relevance in the metabolism of a Mediterranean coastal lagoon

This work aims to characterise the current autotrophic compartment of the Albufera des Grau coastal lagoon (Menorca, Balearic Islands) and to assess the relationship between the submerged macrophytes and the limnological parameters of the lagoon. During the study period the submerged vegetation was dominated by the macrophyte Ruppia cirrhosa, which formed dense extensive meadows covering 79% of the surface. Another macrophyte species, Potamogeton pectinatus, was also observed but only forming small stands near the rushing streams. Macroalgae were only occasionally observed. Macrophyte biomass showed a clear seasonal trend, with maximum values in July. The biomass of R. cirrhosa achieved 1760 g DW m-2, the highest biomass ever reported for this species in the literature. The seasonal production-decomposition cycle of the macrophyte meadows appears to drive the nutrient dynamics and carbon fluxes in the lagoon. Despite the significant biomass accumulation and the absence of a washout of nutrients and organic matter to the sea, the lagoon did not experience a dystrophic collapse. These results indicate that internal metabolism is more important than exchange processes in the lagoon.

Los sedimentos de la plataforma continental balear

El análisis sedimentológico de distintos sectores de la plataforma continental balear (Bahia de Campos, Sur de Menorca y Canal de Menorca) ha puesto de manifiesto la existencia de siete grupos de facies: A) algales, B) de bivalvos, C) de gasterpodos, D) bioclsticas, E) mixtas, F) de fragmentos liticos y G) cementadas (costras algales y calcarenitas). La distribución de estas facies sedimentarias guarda una estrecha relación con la profundidad, excepto en el Sur de Menorca, y con las comunidades bentónicas que se desarrollan en la plataforma continental. Las facies que recubren actualmente la plataforma balear se depositaron durante la fase del ascenso del nivel del mar de la transgresión Versiliense.

Molecular dating of caprines using ancient DNA sequences of Myotragus balearicus, an extinct endemic Balearic mammal

Background: Myotragus balearicus was an endemic bovid from the Balearic Islands (Western Mediterranean) that became extinct around 6,000-4,000 years ago. The Myotragus evolutionary lineage became isolated in the islands most probably at the end of the Messinian crisis, when the desiccation of the Mediterranean ended, in a geological date established at 5.35 Mya. Thus, the sequences of Myotragus could be very valuable for calibrating the mammalian mitochondrial DNA clock and, in particular, the tree of the Caprinae subfamily, to which Myotragus belongs. Results: We have retrieved the complete mitochondrial cytochrome b gene (1,143 base pairs), plus fragments of the mitochondrial 12S gene and the nuclear 28S rDNA multi-copy gene from a well preserved Myotragus subfossil bone. The best resolved phylogenetic trees, obtained with the cytochrome b gene, placed Myotragus in a position basal to the Ovis group. Using the calibration provided by the isolation of Balearic Islands, we calculated that the initial radiation of caprines can be dated at 6.2 ± 0.4 Mya. In addition, alpine and southern chamois, considered until recently the same species, split around 1.6 ± 0.3 Mya, indicating that the two chamois species have been separated much longer than previously thought. Conclusion: Since there are almost no extant endemic mammals in Mediterranean islands, the sequence of the extinct Balearic endemic Myotragus has been crucial for allowing us to use the Messinian crisis calibration point for dating the caprines phylogenetic tree.

Lactarius tesquorum, especie nueva para las Islas Baleares

En la exploración micológica efectuada durante el mes de noviembre de 1980 en la isla de Menorca, recolectamos una especie de Lactarius perteneciente a la estirpe torminosus en un matorral de Cistus monspeliensis sobre sustrato acido. Según las claves de M. BON(1980) podría tratarse de Lactarius tesquorum Malenc.

La Cova des Pas de Ferreries: notícia de la seva troballa

Durant la primavera del 2005, tres espeleòlegs es varen endinsar al barranc de Trebalúger, a prop de Ferreries, al sud-est de l"illa de Menorca. El seu objectiu era el barranc; l"havien vist feia unes quantes setmanes i no podien deixar passar aquell forat, de difícil accés. No sabien que estaven a punt de fer una de les troballes més extraordinàries de la prehistòria menorquina. Varen assegurar les cordes al cim de la paret i, tot fent un ràpel de trenta-cinc metres, accediren a un petit forat, veí de la cova a la qual volien arribar. Des d"allà varen haver de reptar, penjats de l"espadat, per una mena de graó estret o postada, un pas obligat per arribar-hi, que acabaria donant nom a la petita cova. Quan varen accedir al graó d"entrada ja havien decidit que allò seria la cova des Pas.

Molecular dating of caprines using ancient DNA sequences of Myotragus balearicus, an extinct endemic Balearic mammal

Background: Myotragus balearicus was an endemic bovid from the Balearic Islands (Western Mediterranean) that became extinct around 6,000-4,000 years ago. The Myotragus evolutionary lineage became isolated in the islands most probably at the end of the Messinian crisis, when the desiccation of the Mediterranean ended, in a geological date established at 5.35 Mya. Thus, the sequences of Myotragus could be very valuable for calibrating the mammalian mitochondrial DNA clock and, in particular, the tree of the Caprinae subfamily, to which Myotragus belongs. Results: We have retrieved the complete mitochondrial cytochrome b gene (1,143 base pairs), plus fragments of the mitochondrial 12S gene and the nuclear 28S rDNA multi-copy gene from a well preserved Myotragus subfossil bone. The best resolved phylogenetic trees, obtained with the cytochrome b gene, placed Myotragus in a position basal to the Ovis group. Using the calibration provided by the isolation of Balearic Islands, we calculated that the initial radiation of caprines can be dated at 6.2 ± 0.4 Mya. In addition, alpine and southern chamois, considered until recently the same species, split around 1.6 ± 0.3 Mya, indicating that the two chamois species have been separated much longer than previously thought. Conclusion: Since there are almost no extant endemic mammals in Mediterranean islands, the sequence of the extinct Balearic endemic Myotragus has been crucial for allowing us to use the Messinian crisis calibration point for dating the caprines phylogenetic tree.

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