Mediterranean Transition Zone Research Articles

Doğu Akdeniz Geçit Kuşağında Bazı Soya (Glycine max. (L.) Merr.) Genotiplerinin Önemli Tarımsal Özellikleri ve Adaptasyonunun Belirlenmesi

This research was carried out to determine the yield and agronomic characteristics of some soybean genotypes under main crop conditions in the Eastern Mediterranean Transition Zone in the years 2021-2022. In the research, 13 varieties (Adel, AP-3773, Arısoy, Asya, Atakişi, Atlas-3616, J-112, Lider, Planet, Racer, Sonya, Winchester, Yemsoy) 1 genotype (Yeniköy-9) were used. The experiment was conducted in a randomized block design with three replications. It was determined that the average plant height varied between 64.05 cm (J-112) and 114.25 cm (Winchester). The lowest average first pods height (1.74 cm) was obtained from J-112 variety while the highest value (13.69 cm) was obtained from Yemsoy variety. The lowest number of branches per plant values i.e. 1.83 no. plant-1 and 2.13 no. plant-1 were recorded from J-112 and Planet variety respectively. In the experiment, the number of pods per plant varied between 72.20 pods plant-1 (Arısoy) to 105.61 pods plant-1 (AP-3773). However, the average weight of 100 seeds varied between 15.07 g (Asya) to 22.10 g (Lider). The lowest average protein content (33.58%) was obtained from Yemsoy variety while the highest value (41.50%) was obtained from J-112 variety. It was determined that the average seed yield varied between 379.74 kg da-1 (Arısoy) and 580.73 kg da-1 (Lider). According to the data obtained as a result of the experiment, Lider variety was come front with the highest seed yield (580.73 kg da-1) and, J-112 variety had the high protein content with 41.50%, Planet (21.96 g) and Yeniköy-9 (20.87 g) varieties had the highest 100 seed weight. According to production goals, one of this superior varieties may be prefer to grow in the Eastern Mediterranean Transition Zone.

Bazı Yerfıstığı Çeşitlerinin Yağ Kalitesi Özellikleri ve Yağ Asidi Bileşimlerinin Belirlenmesi

The aim of this study was to determine the oil properties and fatty acid compositions of peanut cultivars (Arachis hypogaea L.) grown as the main crop in the Eastern Mediterranean transition zone of Turkey. The field experiment was conducted at the Oil Seed Research Institute experiment area in the main crop seasons of 2018 and 2019. The experiment was designed according to the randomized complete block design (RCBD) with three replications. Oil ratio, saturated fatty acids (palmitic acid, stearic acid), unsaturated fatty acids (oleic acid, linoleic acid), iodine value, and oleic/linoleic acid ratios were investigated in the experiment. Runner (Georgia Green), Spanish (Florispan), and Virginia market types (Sultan, Brantley, BATEM-Cihangir, BATEM-5025, Arioglu-2003, Halisbey, NC-7, Flower-22, Wilson, NC-V-11, Com, Osmaniye-2005, Gazipasa) varieties were used as plant materials. As a result of this study, NC-V-11 (52.23%) cultivar with the highest oil content was determined, followed by Florispan (52.16%), Brantley (52.10%), and Gerogia Green (51.54%). The lowest oil content was obtained from BATEM-Cihangir (44.57%) variety. Brantley variety was found to have the least palmitic acid ratio with 8.04%, while Florispan variety was found the highest with 12.24%. In terms of stearic acid ratios, the lowest value (1.38%) was determined in Com variety, while the highest value (2.91%) was found in Brantley variety. Brantley variety was found to have the highest oleic acid content (71.83%), which is one of the unsaturated fatty acids. Florispan variety had the lowest oleic acid content (43.70%). While Brantley variety had the lowest linoleic acid ratio (9.78%), it was determined that Com variety had the highest linoleic acid ratio (35.77%). The iodine value varied between 78.71-100.71, the lowest value was in Brantley and the highest value was in Com. The oleic acid/linoleic acid ratio was determined to vary between 1.22 and 7.35, the lowest value was in Florispan and the highest value was in Brantley. As a result of the research, it was determined that the variety with the highest oleic acid ratio in the Eastern Mediterranean Transition Zone was Brantley. Peanuts with high oleic acid content are preferred by producers and consumers because they have good quality and extend the shelf life of products producing with them.

Establishment of warm‐season turfgrasses in a Mediterranean transition zone under simulated waterlogging

AbstractThe Mediterranean region is expected to experience increased extreme precipitation events with the risk of inland flooding because of climate change. This may adversely affect the establishment of warm‐season turf species, usually selected for low water consumption. A simulated waterlogging experiment was conducted at the University of Padua in northeastern Italy during the summers of 2017 and 2018. Four bermudagrass (Cynodon spp.) cultivars (La Paloma, Transcontinental, SR 9554, and Jackpot), ‘Pure Dynasty’ seashore paspalum (Paspalum vaginatum Swartz), and ‘SWI 2000’ buffalograss [Buchloë dactyloides (Nutt.) Engelm.] were compared under waterlogging conditions. The response of the three warm‐season species to four waterlogging events during establishment at two different seeding rates was investigated. The number of seedlings, percentage green coverage, and NDVI were measured. At the end of the experimental periods, the dry weights of the above‐ground biomass and roots were also determined. All the cultivars tested demonstrated high tolerance to waterlogging in the early stages of establishment. Moreover, they produced a significantly higher number of seedlings per unit area when sown at the higher seeding rate.

Doğu Akdeniz geçit kuşağında farklı pazar tipi yerfıstıklarının (Arachis hypogaea L.) ikinci ürün yetitiriciliğinde bazı kalite ve özelliklerinin belirlenmesi

This study was carried out in Osmaniye location of Oil Seed Research Institute in 2020-2021 in order to determine some yield and quality characteristics in second crop cultivation of peanuts with different market types in the Eastern Mediterranean transition zone. Eleven different genotypes of Runner (Georgia Green) Virginia (NC 7, Masal, Halisbey, Wilson, Çom, Brantley, Sultan, Düziçi 1) Spanish (Florispan, Nigeria 1) types of peanut were used in the study. In the study, number of pods per plant, 1st quality pod ratio, pod weight per plant, 100 pod and seed weight, shelling percentage, pod yield, oil content and, protein content parameters were investigated. The number of pods per plant is between 20.8 (Nigeria 1) and 51.4 (Düziçi 1); pod weight per plant varied between between 12.3 g (Nigeria-1) and 64.9 g (Halisbey). It was determined that 100 pod weight and 100 seed weights varied between 66.8-289.0 g and 29.6-106.5 g, respectively. Pod yield varied between 1963 kg ha-1 (Nigeria 1) and 4846 kg ha-1 (Düziçi 1). As a result, it was determined that Düziçi 1 genotype, Brantley and Halisbey cultivars came to the fore in terms of the investigated characteristics in the Eastern Mediterranean Passage zone. In the study, while the second crop peanut variety suitable for the Eastern Mediterranean Transition zone was determined, the varieties to be used as breeding material were also determined.

Morphological and pomological characterization of some genotypes Sumac (Rhus coriaria L.) obtained by selection breeding

Sumac (R. coriaria L.) is a subtropic and temperate climate plant with medicinal and aromatic properties which has a natural distribution in many regions of Anatolia. Sumac which is used as a food additive in the food industry due to the flavoring substances has been in high demand in recent years. Besides the beneficial secondary metabolites, it is used in the field of medicine and pharmacy. Sumac (R. coriaria) which grows spontaneously in the natural environment without any agricultural practices is collected by the local people in the region and supplied to the local market. Since this situation, the ideas of creating modern orchards for sumac have begun to emerge. For this reason, selection breeding studies have been planned in sumac (R. coriaria L.). This study was carried out at the East Mediterranean Transition Zone Agricultural Research Institute during 2019-2021 years. Approximately 300 different sumac genotypes were observed and botanically 92 genotypes were found positive in this study. It was determined that the wet weight values of the clusters in the examined sumac genotypes varied between 5.63-87.74 g as a result of the statistical analysis. The highest cluster weight varied between 87.74, 78.92, and 70.81 g in GN26, GN86, and GN90 genotypes respectively. The lowest cluster wet weight was found in GN28 (5.63 g) and GN41 (6.00 g) genotypes in the study. It was found in the study that the cluster powder efficiency values varied between 30.62% and 72.49% and the average cluster powder efficiency was 49.15%. It was determined that the results obtained from about 20 sumac genotypes were found to be positive in the statistical analyzes made on the characteristics examined in this study. It is aimed to use this sumac (R. coriaria L.) genotypes in the modern sumac cultivation planned for the future.

Effect of Planting Times on the Yield and Quality of Fenugreek (Trigonella Foenum-Graecum L.) Under the Conditions of Kahramanmaraş

This study was performed in the 2013-2014 cultivation season with the purpose of determining the most suitable planting season of fenugreek under the ecological conditions of Kahramanmaraş. The trial was established in two different cultivation periods as winter and spring at the Eastern Mediterranean Transition Zone Agricultural Research Station in according to factorial randomized block design with three replications. In the study, the Gürarslan fenugreek variety as well as Candicate Line-1 and Genotype-1 fenugreek genotypes were used as material. In the study, features such as plant height, first pod height, number of branches per plant, pod length, number of pods per plant, number of seeds per pod, seed yield per plant, seed yield per decare, thousand seed weight, mucilage rate, fixed oil ratio, fixed oil yield, crude protein ratio, humidity, raw ash ratio, and the rates of linoleic acid, alpha linoleic acid, oleic acid, palmitic acid, stearic acid as important fatty acids were studied. Variance analysis made on the data obtained by using SPSS statistical package program. In the comparison of the means, Duncan multiple comparison test was used. As a result, in this study, was found that in the region where the study was performed, the most suitable planting season for fenugreek cultivators is the winter planting dated winter planting when the highest values of plant height, number of pods per plant, seed yield per plant were obtained. From the features studied in the research the difference between genotypes was found significant only from the perspective of seed yield per plant and fixed oil ratio. While the best results were obtained from Genotype-1 for seed yield per plant, the best results for fixed oil yield were obtained from Candicate Line-1.

Determination of Saturated and Unsaturated Fatty Acids in Second Crop Season Peanut Cultivation in the Eastern Mediterranean

In this study; the saturated and unsaturated fatty acid composition of 11 different peanut cultivars, Runner (Georgia Green) Virginia (NC-7, Masal, Halisbey, Wilson, Com, Brantley, Duzici-1) Spanish (Florispan, Nigeria-1), widely grown in the eastern Mediterranean Transition Zone were determined. The research was carried out for two years (2020 to 2021) under second crop season conditions in the trial areas of the Oil Seeds Research Institute. The experiment was set up in a randomized block design with 3 replications. In the research, palmitic acid, stearic acid, arachidonic acid, oleic acid, linoleic acid, oleic/linoleic ratio, iodin value, behenic acid, arachidic acid properties were investigated. The highest oleic acid ratio was obtained from Masal (79.71%), the highest palmitic acid from florispan (11.06%), and the highest linoleic acid (34.08%) from florispan. The behenic acid ratio was found between 2.51% (Wilson) and 3.14% (Georgia Green).

Seeding Time Affects Bermudagrass Establishment in the Transition Zone Environment

Bermudagrass is becoming increasingly popular in the Mediterranean transition zone of Europe for establishing new sports and recreational turfgrasses. In these regions, the quality and winter hardiness of bermudagrass turf is influenced by the establishment. It has been demonstrated that an early establishment of bermudagrass results in a longer growing season with a greater stolon and rhizome production, which favors cold hardiness and a quicker green up after the first winter. Dormant seeding is reported to be beneficial for an early establishment. However, the response to early seeding depends on local environmental conditions. A field study was conducted in northeastern Italy during spring 2018 and 2019. Four bermudagrass cultivars (“Transcontinental”, “Jackpot”, “SR9554”, and “La Paloma”) were compared under three seeding times from March to May to evaluate whether early spring seeding allows anticipating the establishment of bermudagrass compared with late spring seeding which generally benefits of better temperatures for germination and growth. The number of days from seeding to the emergence and from seeding to the full establishment were determined, and the number of seedlings was counted in each plot. Late March seeding assured the earliest establishment. This result could be due to the quick lateral spreading of seedlings as the emergence occurred about 15 days later in the late March seeding compared with April and May seedings. Results also displayed that the speed of establishment was positively related to the number of emerged seedlings. “Transcontinental”, “Jackpot”, and “SR9554” performed similarly, whereas “Jackpot” showed a slower establishment.

Seashore paspalum in the Mediterranean transition zone: phenotypic traits of twelve accessions during and after establishment

The use of warm-season turfgrasses is consolidated in the transitional areas of Mediterranean countries and some field trials have provided information on the adaptability of seashore paspalum to Mediterranean environment. Nonetheless, little is known on the performance of the different commercial cultivars of <em>Paspalum vaginatum</em> in this climatic zone. Furthermore, considering the high degree of variability of this species, ecotypes have the potential to supply new plant material with desired turf characteristics. The research aimed at comparing growth characteristics and morphological traits of eight commercial cultivars of seashore paspalum (Platinum, Salam, SeaDwarf, Sea Isle 1, Sea Isle 2000, Velvetene, Marina and Sea Spray) and four ecotypes (CeRTES 101, CeRTES 102, CeRTES 103, CeRTES 104), during establishment and on mature turf grown in two Italian locations (Pisa and Palermo). Probably due to higher mean minimum temperatures a clear effect of location was recorded during the establishment year with fastest stolon growth rate and higher ground cover at 133 days after planting being registered in Palermo. Internode length and diameter, node density, horizontal stem density, turf quality and colour gave instead higher values in Pisa. On mature turf best colour ratings were of SeaDwarf and the ecotype CeRTES 104. The finest leaves were found in Sea Isle 2000 (1.5 mm) while the denser cultivars, and potentially the most wear resistant were Sea Isle 1, CeRTES 104, and Platinum. Top quality was scored for Sea Isle 1, Sea Isle 2000 and Platinum. Best performances for fall colour retention and spring green up were frequently associated with commercial cultivars. The relative ranking of the commercial cultivars for aesthetic and functional performance can be a tool for the decisions of turf managers while data of ecotype CeRTES 104 as to colour, shoot density and quality stimulate further research for the identifications of ecotypes with superior traits of visual quality and wear resistance.

Genetic differentiation between Mediterranean and Atlantic populations of the common prawn Palaemon serratus (Crustacea: Palaemonidae) reveals uncommon phylogeographic break

The Atlantic–Mediterranean transition zone between the Alborán Sea and the Gulf of Cádiz constitutes the most prominent marine geographic barrier in European waters and includes known phylogeographic breaks such as the Strait of Gibraltar and the Almería-Oran Front. A genetic shift in this area has been previously documented for the European littoral shrimp Palaemon elegans. Here we carried out a phylogeographic analysis with the congeneric and sympatric species Palaemon serratus to test for similar intraspecific genetic differentiation and geographic structure. This littoral prawn is distributed in the Northeastern Atlantic Ocean, the Mediterranean Sea and the Black Sea. We compared DNA sequences from the mitochondrial genes Cox1 and to a lesser extent from 16S rRNA of several Atlantic and Mediterranean populations. Furthermore, sequences from the nuclear gene Enolase were included for corroborating differences between Mediterranean and Atlantic individuals. A pronounced genetic differentiation was detected between the Mediterranean and Atlantic populations, amounting to 10.14% in Cox1 and 2.0% in 16S, indicating the occurrence of two independent evolutionary lineages. Interestingly, specimens from the Atlantic Gulf of Cadiz cluster together with the Mediterranean individuals, indicating that a biogeographic barrier appears to be located west of the Strait of Gibraltar.

A legacy of contrasting spatial genetic structure on either side of the Atlantic–Mediterranean transition zone in a marine protist

The mechanisms that underpin the varied spatial genetic structures exhibited by free-living marine microorganisms remain controversial, with most studies emphasizing a high dispersal capability that should redistribute genetic diversity in contrast to most macroorganisms whose populations often retain a genetic signature of demographic response to historic climate fluctuations. We quantified the European phylogeographic structure of the marine flagellate Oxyrrhis marina and found a marked difference in spatial genetic structure, population demography, and genetic diversity between the northwest Atlantic and Mediterranean Sea that reflects the persistent separation of these regions as well as context-dependent population responses to contrasting environments. We found similar geographic variation in the level of genetic diversity in the sister species Oxyrrhis maritima. Because the capacity for wide dispersal is not always realized, historic genetic footprints of range expansion and contraction persist in contemporary populations of marine microbes, as they do in larger species. Indeed, the well-described genetic effects of climatic variation on macroorganisms provide clear, testable hypotheses about the processes that drive genetic divergence in marine microbes and thus about the response to future environmental change.

Establishment and Performance of Bluegrass Species and Tall Fescue under Reduced-input Maintenance in a Temperate Mediterranean Environment

Turfgrass water conservation has become important in many parts of the world, including the transition zones of Mediterranean Europe. Species selection is considered one of the most important factors influencing turfgrass water use, and drought-tolerant cool-season species are encouraged to be used in areas where long dormancy periods of warm-season grasses is unacceptable. A field study was conducted from Mar. 2007 to Sept. 2009 at Padova University, Italy, to evaluate establishment and performance of nine turfgrass cultivars under reduced-input maintenance. The study included hybrid bluegrass (Poa pratensis × P. arachnifera) cultivars Solar Green, Thermal Blue, and Thermal Blue Blaze; kentucky bluegrass (Poa pratensis) cultivars Cocktail, Cynthia, and Geronimo; and tall fescue (Festuca arundinacea) cultivars Apache, Murray, and Regiment. Establishment rate was assessed after two seeding dates (20 Mar. and 20 Sept.), and grasses were subsequently fertilized with 15 g·m−2 nitrogen per year and irrigated once every 2 weeks at 40% of reference evapotranspiration from June to August. Turfgrass and weed cover were estimated 60 days after seeding (DAS), and turf quality was evaluated weekly on a scale of 1 (worst) to 9 (best). Normalized difference vegetation index (NDVI) was measured weekly during 2009. Tall fescue cultivars exhibited greater quality than hybrid bluegrass or kentucky bluegrass, under both spring and autumn seeding. Hybrid bluegrass had similar quality to kentucky bluegrass cultivars, although they performed well only when sown in autumn. Our results suggest that among the tested grasses, tall fescue performed better under the reduced irrigation in a Mediterranean transition zone climate than kentucky bluegrass or hybrid bluegrass.

Strong genetic differentiation on a fragmentation gradient among populations of the heterocarpic annual Catananche lutea L. (Asteraceae)

In landscapes which are predominately characterised by agriculture, natural ecosystems are often reduced to a mosaic of scattered patches of natural vegetation. Species with formerly connected distribution ranges now have restricted gene flow among populations. This has isolating effects upon population structure, because species are often confined by their limited dispersal capabilities. In this study, we test the effects of habitat fragmentation, precipitation, and isolation of populations on the genetic structure (AFLP) and fitness of the Asteraceae Catananche lutea. Our study area is an agro-dominated ecosystem in the desert–Mediterranean transition zone of the Southern Judea Lowlands in Israel. Our analysis revealed an intermediate level of intra-population genetic diversity across the study site with reduced genetic diversity on smaller scale. Although the size of the whole study area was relatively small (20 × 45 km), we found isolation by distance to be effective. We detected a high level of genetic differentiation among populations but genetic structure did not reflect spatial patterns. Population genetic diversity was correlated neither with position along the precipitation gradient nor with different seed types or other plant fitness variables in C. lutea.

Scale-dependent determinants of plant species richness in a semi-arid fragmented agro-ecosystem

Aims: (1) Understanding how the relationship between species richness and its determinants depends on the interaction between scales at which the response and explanatory variables are measured. (2) Quantifying the relative contributions of local, intermediate and large-scale determinants of species richness in a fragmented agro-ecosystem. (3) Testing the hypothesis that the relative contribution of these determinants varies with the grain size at which species richness is measured. Location: A fragmented agro-ecosystem in the Southern Judea Lowland, Israel, within a desert–Mediterranean transition zone. Methods: Plant species richness was estimated using hierarchical nested sampling in 81 plots, positioned in 38 natural vegetation patches within an agricultural matrix (mainly wheat fields) among three land units along a sharp precipitation gradient. Explanatory variables included position along that gradient, patch area, patch isolation, habitat heterogeneity and overall plant density. We used general linear models and hierarchical partitioning of variance to test and quantify the effect of each explanatory variable on species richness at four grain sizes (0.0625, 1, 25 and 225 m2). Results: Species richness was mainly affected by position along a precipitation gradient and overall plant density, and to a lesser extent by habitat heterogeneity. It was also significantly affected by patch area and patch isolation, but only for small grain sizes. The contribution of each explanatory variable to explained variance in species richness varied with grain size, i.e. scale-dependent. The influence of geographic position and habitat heterogeneity on species richness increased with grain size, while the influence of plant density decreased with grain size. Main conclusions: Species richness is determined by the combined effect of several scale-dependent determinants. Ability to detect an effect and effect size of each determinant varies with the scale (grain size) at which it is measured. The combination of a multi-factorial approach and multi-scale sampling reveals that conclusions drawn from studies that ignore these dimensions are restricted and potentially misleading.

The structure of the Atlantic–Mediterranean transition zone from the Alboran Sea to the Horseshoe Abyssal Plain (Iberia–Africa plate boundary)

The diffusive plate boundary between Iberia and Africa has been analyzed by means of already published and new 28 multichannel seismic profiles covering most of the Atlantic margins of SW Spain and NW Morocco. This region includes the prolongation of the Betic–Rifean tectonic units along the Gibraltar Arc. One of the most characteristic units in the study area is the Miocene seismically chaotic unit that has been divided in a tectonic and a gravitational domains in accordance to previous interpretation by Torelli et al. [Torelli, L., Sartori, R., Zitellini, N., 1997. The giant chaotic body in the Atlantic Ocean off Gibraltar: new results from a deep seismic reflection survey. Marine and Petroleum Geology 14, 125–138.]. In this work we redefine the limits of both domains and rename them as the Gulf of Cadiz Imbricate Wedge and the Horseshoe Gravitational Unit. We interpret the Gulf of Cadiz Imbricate Wedge as a west-migrating thick thrust system that build up in a relatively short period of time. This unit constitutes the continuation of the Miocene chaotic units observed onshore to the front of the External Units in the Betics and the Rif (the Guadalquivir Allochthonous Unit and the Rides Prerifaines). The Horseshoe Gravitational Unit, covering an approximate area of 18 000 km 2 with a volume of around 23 000 km 3, is interpreted as giant submarine debris flows sourced from the up-building of the Gulf of Cadiz Imbricate Wedge, surrounding basement highs and the continental Iberian Slope. The fast westward migration of the Flysch units, the External Units and the Gulf of Cadiz Imbricate Wedge, from the Early Miocene to the Late Tortonian corresponds to a different tectonic process than the protracted but slow NNW to NW convergence of Africa. Our interpretation favours the westward slab retreat theory to form the arcuate shape of the Atlantic side of the Iberia–Africa plate boundary. The subduction mechanism as well as potential roll-over was only active from late Early Miocene to Late Miocene spanning about 12 Myr.

Seedling survival responses to irradiance are differentially influenced by low-water availability in four tree species of the Iberian cool temperate–Mediterranean ecotone

Abstract Inter-specific differences in seedling survival responses along a sun-shade gradient and the influence of low-water availability were examined for four Iberian tree species (Q uercus robur L., Quercus pyrenaica Willd., Pinus sylvestris L. and Pinus pinaster Ait.) typical of the cool temperate–Mediterranean transition zone. Seedlings were grown under controlled conditions in a factorial experiment with four levels of irradiance (1%, 6%, 20% and 100% of full sunlight) and two levels of water availability. Five censuses (from late spring to autumn) leading to four regular intervals (T 0 → T I ; T I → T II ; T II → T III ; T III → T IV ) were established. Statistical models of seedling survival as a function of irradiance were calibrated throughout the whole experiment (T 0 → T IV ) and also for each time interval and water availability level. Seedling survival responses among different species diverged both in the type of functional response to irradiance and in their response to water stress. Ranking of species according to shade tolerance ( Q. pyrenaica > Q. robur > P. sylvestris > P. pinaster ) contrasted with tolerance of high irradiance and conformed to a hypothetical sun-shade trade-off for survival (i.e. species having higher survival in low irradiance—oaks—had poorer survival at high irradiance and vice-versa). Low-water availability also differentially affected each species, with pines being more drought tolerant than oaks. At an intra-specific level, low-water availability decreased survival of Q. pyrenaica under both high and low irradiance. For Q. robur , however, low-water availability exerted a relatively stronger effect under low irradiance. Consequences of the interplay between irradiance and water availability for explaining segregation and coexistence of forest tree species at the ecotone between cool temperate and Mediterranean forests are discussed.

Lithospheric structure in the Atlantic–Mediterranean transition zone (southern Spain, northern Morocco): a simple approach from regional elevation and geoid data

A new methodology for automatic modelling of crustal and lithospheric thickness or density variations that integrates both elevation and geoid anomalies is presented. We used this algorithm to image the main lithospheric heterogeneities within the Atlantic–Mediterranean transition zone. Main assumptions in the modelling are local isostasy and a two-layered model comprising crust and lithospheric mantle with constant densities, plus sea water and asthenosphere. The results show a wide zone of thickened lithosphere, oriented NE–SW and located beneath the western Betics and Rif, the Gulf of Cadiz and the northwestern Atlantic Moroccan margin. In addition, a zone of thinned lithosphere with the same orientation is shown beneath the Atlas Mountains and the eastern Alboran Basin. To cite this article: J. Fullea Urchulutegui et al., C. R. Geoscience 338 (2006).

The Mediterranean transition zone

Economic AffairsVolume 12, Issue 1 p. 22-23 the Mediterranean transition zone Edward Fenech-Adaml, Edward Fenech-Adaml Edward Fenech-Adaml is Prime Minister of Malta. He was educated at the Royal University of Malta. He entered politics in 1961 and became a member of Parliament in 1969, becoming Leader of the Opposition in 1977. He was Editor of II-Popiu.Search for more papers by this author Edward Fenech-Adaml, Edward Fenech-Adaml Edward Fenech-Adaml is Prime Minister of Malta. He was educated at the Royal University of Malta. He entered politics in 1961 and became a member of Parliament in 1969, becoming Leader of the Opposition in 1977. He was Editor of II-Popiu.Search for more papers by this author First published: November 1991 https://doi.org/10.1111/j.1468-0270.1991.tb00830.xAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume12, Issue1November 1991Pages 22-23 RelatedInformation