scholarly journals Vegetation Productivity Losses Linked to Mediterranean Hot and Dry Events

2021 ◽  
Vol 13 (19) ◽  
pp. 4010
Author(s):  
Tiago Ermitão ◽  
Célia M. Gouveia ◽  
Ana Bastos ◽  
Ana C. Russo
Keyword(s):  
Remote Sensing ◽  
Iberian Peninsula ◽  
Western Europe ◽  
Negative Impact ◽  
Eastern Mediterranean ◽  
Gross Primary Production ◽  
Tree Cover ◽  
Vegetation Productivity ◽  
Vegetation Activity ◽  
The Mediterranean

Persistent hot and dry conditions play an important role in vegetation dynamics, being generally associated with reduced activity. In the Mediterranean region, ecosystems are adapted to such conditions. However, prolonged and intense heat and drought or the occurrence of compound hot and dry events may still have a negative impact on vegetation activity. This work aims to study how the productivity of Mediterranean vegetation is affected by hot and dry events, examining a set of severe episodes that occurred in three different regions (Iberian Peninsula, Eastern Mediterranean and Western Europe) between 2001 and 2019. The analysis relies on remote sensing products, namely Gross Primary Production from MODIS to detect and monitor vegetative stress and LST from MODIS and SM from ESA CCI to evaluate the influence of temperature and soil water availability on stressed vegetation. Of all events, the 2005 episode in the Iberian Peninsula was the most significant, affecting large sectors of low tree cover areas and crops and leading to reductions of annual plant productivity in affected vegetation of ~47 TgC/year. The obtained results highlight the influence of land-atmosphere coupling on vegetation productivity and clarified the role of warm springs on vegetation activity and soil moisture that may amplify summer temperatures. The functional recovery of affected vegetation productivity after these episodes varied across events, ranging from months to years. This work highlights the influence of hot and dry events on vegetation productivity in the Mediterranean basin and the usefulness of remote-sensing products to assess the response of different land covers to such episodes.

VI—Some Rock-cut Tombs and Habitation Caves in Mallorca

Archaeologia ◽  
1927 ◽  
Vol 76 ◽  
pp. 121-160 ◽  
Author(s):  
W.J. Hemp
Keyword(s):  
Western Europe ◽  
Eastern Mediterranean ◽  
Balearic Islands ◽  
Common Origin ◽  
Central Position ◽  
Western Basin ◽  
Direct Route ◽  
The Mediterranean ◽  
Principal Subject ◽  
Burial Cave

It has been claimed that in its general form the type of burial cave which is the principal subject of this paper is in some way linked with the longbarrows of Britain; that is to say they must have had a common origin, and both must have been built by people dominated by some very powerful tradition—the cult of the dead. So far as western Europe is concerned, it is here assumed that the original home of this cult, or at any rate of many of its attributes, is to be sought for in or around the eastern Mediterranean, and that a great deal, if not all, of its influence reached Britain by way of Spain, or by the more direct route on which lie the Aries group of caves and those of the Marne. Therefore, in view of the central position of the Balearic Islands in the western basin of the Mediterranean, there is at least a possibility that the monuments of megalithic type to be found in them may bear a definite, even if remote, relation to those of Britain.

Caloplaca squamuloisidiata, a new lichen species from Portugal and Spain

2006 ◽  
Vol 38 (6) ◽  
pp. 529-535 ◽  
Author(s):  
Pieter P. G. van den BOOM ◽  
Víctor J. RICO
Keyword(s):  
Iberian Peninsula ◽  
Mediterranean Region ◽  
Western Europe ◽  
Lichen Species ◽  
Acid Rock ◽  
The Mediterranean ◽  
Western Half ◽  
Pale Green ◽  
Rock Faces

Caloplaca squamuloisidiata van den Boom & V. J. Rico is described as new to science. It is a saxicolous species, pale green to grey, with olivaceous patches, with a rimose-areolate, squamulose, lobulate and isidiate thallus, growing on inland exposed acid rock faces in the western half of the Iberian Peninsula in the Mediterranean region. Its ecology and distribution, and the lichen communities in which it was found are presented. A key to the isidiate and granular-isidiate Caloplaca species in Western Europe is also included.

scholarly journals "European Islam" or "Islam in Europe": two concepts in the context of European integration

2005 ◽  
pp. 13-21
Author(s):  
Yu.M. Kochubey
Keyword(s):  
Iberian Peninsula ◽  
European Integration ◽  
Ottoman Empire ◽  
Central Europe ◽  
Western Europe ◽  
North African ◽  
The Balkans ◽  
The North ◽  
Colonial Expansion ◽  
The Mediterranean

Speaking of Islam or Muslims, they have long been known in Western Europe, starting with the conquest of the Iberian Peninsula, the Mediterranean, the Battle of Guiatti. Later, there were the Crusades, the expansion of the Ottomans in the Balkans and Central Europe, the North African corsairs, and the colonial expansion of Europeans on Muslim land, in particular, under the Ottoman Empire.

Transnational Patriotism in the Mediterranean, 1800-1850

2018 ◽  
Author(s):  
Konstantina Zanou
Keyword(s):  
Western Europe ◽  
Political Space ◽  
The Balkans ◽  
Italian Peninsula ◽  
Nation States ◽  
Multicultural Context ◽  
The Common ◽  
Ugo Foscolo ◽  
The Mediterranean ◽  
The Republic

Transnational Patriotism in the Mediterranean, 1800–1850: Stammering the Nation investigates the long process of transition from a world of empires to a world of nation-states by narrating the biographies of a group of people who were born within empires but came of age surrounded by the emerging vocabulary of nationalism, much of which they themselves created. It is the story of a generation of intellectuals and political thinkers from the Ionian Islands who experienced the collapse of the Republic of Venice and the dissolution of the common cultural and political space of the Adriatic, and who contributed to the creation of Italian and Greek nationalisms. By uncovering this forgotten intellectual universe, Transnational Patriotism in the Mediterranean retrieves a world characterized by multiple cultural, intellectual, and political affiliations that have since been buried by the conventional narrative of the formation of nation-states. The book rethinks the origins of Italian and Greek nationalisms and states, highlighting the intellectual connection between the Italian peninsula, Greece, and Russia, and re-establishing the lost link between the changing geopolitical contexts of western Europe, the Mediterranean, and the Balkans in the Age of Revolutions. It re-inscribes important intellectuals and political figures, considered ‘national fathers’ of Italy and Greece (such as Ugo Foscolo, Dionysios Solomos, Ioannis Kapodistrias, and Niccolò Tommaseo), into their regional and multicultural context, and shows how nations emerged from an intermingling, rather than a clash, of ideas concerning empire and liberalism, Enlightenment and religion, revolution and conservatism, and East and West.

scholarly journals Mitogenomics of the endangered Mediterranean monk seal (Monachus monachus) reveals dramatic loss of diversity and supports historical gene-flow between Atlantic and eastern Mediterranean populations

2020 ◽  
Author(s):  
Alba Rey-Iglesia ◽  
Philippe Gaubert ◽  
Gonçalo Espregueira Themudo ◽  
Rosa Pires ◽  
Constanza De La Fuente ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Gene Flow ◽  
North Atlantic ◽  
Marine Mammals ◽  
Eastern Mediterranean ◽  
The Black Sea ◽  
Mediterranean Populations ◽  
Geographic Ranges ◽  
Western Sahara ◽  
The Mediterranean

Abstract The Mediterranean monk seal Monachus monachus is one of the most threatened marine mammals, with only 600–700 individuals restricted to three populations off the coast of Western Sahara and Madeira (North Atlantic) and between Greece and Turkey (eastern Mediterranean). Its original range was from the Black Sea (eastern Mediterranean) to Gambia (western African coast), but was drastically reduced by commercial hunting and human persecution since the early stages of marine exploitation. We here analyse 42 mitogenomes of Mediterranean monk seals, from across their present and historical geographic ranges to assess the species population dynamics over time. Our data show a decrease in genetic diversity in the last 200 years. Extant individuals presented an almost four-fold reduction in genetic diversity when compared to historical specimens. We also detect, for the first time, a clear segregation between the two North Atlantic populations, Madeira and Cabo Blanco, regardless of their geographical proximity. Moreover, we show the presence of historical gene-flow between the two water basins, the Atlantic Ocean and the Mediterranean Sea, and the presence of at least one extinct maternal lineage in the Mediterranean. Our work demonstrates the advantages of using full mitogenomes in phylogeographic and conservation genomic studies of threatened species.

scholarly journals Impact of air–sea coupling on the climate change signal over the Iberian Peninsula

2021 ◽  
Author(s):  
Alba de la Vara ◽  
William Cabos ◽  
Dmitry V. Sein ◽  
Claas Teichmann ◽  
Daniela Jacob
Keyword(s):  
Climate Change ◽  
Iberian Peninsula ◽  
Mediterranean Sea ◽  
Large Scale ◽  
Regional Distribution ◽  
Coupled Model ◽  
Climate Change Signal ◽  
The North ◽  
The Mediterranean ◽  
The Impact

AbstractIn this work we use a regional atmosphere–ocean coupled model (RAOCM) and its stand-alone atmospheric component to gain insight into the impact of atmosphere–ocean coupling on the climate change signal over the Iberian Peninsula (IP). The IP climate is influenced by both the Atlantic Ocean and the Mediterranean sea. Complex interactions with the orography take place there and high-resolution models are required to realistically reproduce its current and future climate. We find that under the RCP8.5 scenario, the generalized 2-m air temperature (T2M) increase by the end of the twenty-first century (2070–2099) in the atmospheric-only simulation is tempered by the coupling. The impact of coupling is specially seen in summer, when the warming is stronger. Precipitation shows regionally-dependent changes in winter, whilst a drier climate is found in summer. The coupling generally reduces the magnitude of the changes. Differences in T2M and precipitation between the coupled and uncoupled simulations are caused by changes in the Atlantic large-scale circulation and in the Mediterranean Sea. Additionally, the differences in projected changes of T2M and precipitation with the RAOCM under the RCP8.5 and RCP4.5 scenarios are tackled. Results show that in winter and summer T2M increases less and precipitation changes are of a smaller magnitude with the RCP4.5. Whilst in summer changes present a similar regional distribution in both runs, in winter there are some differences in the NW of the IP due to differences in the North Atlantic circulation. The differences in the climate change signal from the RAOCM and the driving Global Coupled Model show that regionalization has an effect in terms of higher resolution over the land and ocean.

scholarly journals Detecting the Cool Island Effect of Urban Parks in Wuhan: A City on Rivers

2020 ◽  
Vol 18 (1) ◽  
pp. 132
Author(s):  
Qijiao Xie ◽  
Jing Li
Keyword(s):  
Remote Sensing ◽  
Negative Impact ◽  
Remote Sensing Data ◽  
Urban Parks ◽  
High Water ◽  
Water Bodies ◽  
Green Spaces ◽  
Heat Island ◽  
Island Effect ◽  
Urban Heat

As a nature-based solution, development of urban blue-green spaces is widely accepted for mitigating the urban heat island (UHI) effect. It is of great significance to determine the main driving factors of the park cool island (PCI) effect for optimizing park layout and achieving a maximum cooling benefit of urban parks. However, there have been obviously controversial conclusions in previous studies due to varied case contexts. This study was conducted in Wuhan, a city with high water coverage, which has significant differences in context with the previous case cities. The PCI intensity and its correlation with park characteristics were investigated based on remote sensing data. The results indicated that 36 out of 40 urban parks expressed a PCI effect, with a PCI intensity of 0.08~7.29 °C. As expected, larger parks with enough width had stronger PCI intensity. An increased density of hardened elements in a park could significantly weaken PCI effect. Noticeably, in this study, water bodies in a park contributed the most to the PCI effect of urban parks, while the vegetated areas showed a negative impact on the PCI intensity. It implied that in a context with higher water coverage, the cooling effect of vegetation was weakened or even masked by water bodies, due to the interaction effect of different variables on PCI intensity.

scholarly journals High-Resolution Monitoring and Assessment of Evapotranspiration and Gross Primary Production Using Remote Sensing in a Typical Arid Region

Land ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 396
Author(s):  
Junxia Yan ◽  
Yanfei Ma ◽  
Dongyun Zhang ◽  
Zechen Li ◽  
Weike Zhang ◽  
...  
Keyword(s):  
Remote Sensing ◽  
High Resolution ◽  
Land Surface ◽  
Arid Region ◽  
Management Practices ◽  
Gross Primary Production ◽  
Irrigation District ◽  
Heihe River ◽  
Freshwater Resource ◽  
Oasis Area

Land surface evapotranspiration (ET) and gross primary productivity (GPP) are critical components in terrestrial ecosystems with water and carbon cycles. Large-scale, high-resolution, and accurately quantified ET and GPP values are important fundamental data for freshwater resource management and help in understanding terrestrial carbon and water cycles in an arid region. In this study, the revised surface energy balance system (SEBS) model and MOD17 GPP algorithm were used to estimate daily ET and GPP at 100 m resolution based on multi-source satellite remote sensing data to obtain surface biophysical parameters and meteorological forcing data as input variables for the model in the midstream oasis area of the Heihe River Basin (HRB) from 2010 to 2016. Then, we further calculated the ecosystem water-use efficiency (WUE). We validated the daily ET, GPP, and WUE from ground observations at a crop oasis station and conducted spatial intercomparisons of monthly and annual ET, GPP, and WUE at the irrigation district and cropland oasis scales. The site-level evaluation results show that ET and GPP had better performance than WUE at the daily time scale. Specifically, the deviations in the daily ET, GPP, and WUE data compared with ground observations were small, with a root mean square error (RMSE) and mean absolute percent error (MAPE) of 0.75 mm/day and 26.59%, 1.13 gC/m2 and 36.62%, and 0.50 gC/kgH2O and 39.83%, respectively. The regional annual ET, GPP, and WUE varied from 300 to 700 mm, 200 to 650 gC/m2, and 0.5 to 1.0 gC/kgH2O, respectively, over the entire irrigation oasis area. It was found that annual ET and GPP were greater than 550 mm and 500 gC/m2, and annual oasis cropland WUE had strong invariability and was maintained at approximately 0.85 gC/kgH2O. The spatial intercomparisons from 2010 to 2016 revealed that ET had similar spatial patterns to GPP due to tightly coupled carbon and water fluxes. However, the WUE spatiotemporal patterns were slightly different from both ET and GPP, particularly in the early and late growing seasons for the oasis area. Our results demonstrate that spatial full coverage and reasonably fine spatiotemporal variation and variability could significantly improve our understanding of water-saving irrigation strategies and oasis agricultural water management practices in the face of water shortage issues.

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