scholarly journals The changing face of the Mediterranean – Land cover, demography and environmental change: Introduction and overview

The Holocene ◽  
2019 ◽  
Vol 29 (5) ◽  
pp. 703-707 ◽  
Author(s):  
Andrew Bevan ◽  
Alessio Palmisano ◽  
Jessie Woodbridge ◽  
Ralph Fyfe ◽  
C Neil Roberts ◽  
...  

This paper introduces a special issue on The Changing Face of the Mediterranean: Land Cover, Demography, and Environmental Change, which brings together up-to-date regional or thematic perspectives on major long-term trends in Mediterranean human–environment relations. Particularly, important insights are provided by palynology to reconstruct past vegetation and land cover, and archaeology to establish long-term demographic trends, but with further significant input from palaeoclimatology, palaeofire research and geomorphology. Here, we introduce the rationale behind this pan-Mediterranean research initiative, outline its major sources of evidence and method, and describe how individual submissions work to complement one another.

2019 ◽  
Vol 17 (4) ◽  
pp. 422-431
Author(s):  
Martin Conway

The concept of fragility provides an alternative means of approaching the history of democracy, which has often been seen as the ineluctable consequence of Europe’s social and political modernisation. This is especially so in Scandinavia, as well as in Finland, where the emergence of a particular Nordic model of democracy from the early decades of the twentieth century onwards has often been explained with reference to embedded traditions of local self-government and long-term trends towards social egalitarianism. In contrast, this article emphasises the tensions present within the practices and understandings of democracy in the principal states of Scandinavia during the twentieth century. In doing so, it provides an introduction to the articles that compose this Special Issue, as well as contributing to the wider literature on the fragility of present-day structures of democracy.


2020 ◽  
Author(s):  
Maria Adamo ◽  
Valeria Tomaselli ◽  
Francesca Mantino ◽  
Cristina Tarantino ◽  
Palma Blonda

<p>Coastal wetlands are one of the most threatened ecosystems worldwide. In the Mediterranean Region, wetlands are undergoing rapid changes due to the increasing of human pressures (e.g. land reclamation, water resources exploitation) and climate changes (e.g. coastal erosion), with a resulting habitat degradation, fragmentation, and biodiversity loss.</p><p>Long-term habitat mapping and change detection are essential for the management of coastal wetlands as well as for evaluating the impact of conservation policies.</p><p>Earth observation (EO) data and techniques are a valuable resource for long-term habitat mapping, thanks to the large amount of available data and their high spatial and temporal resolution. In this study, we propose an approach based on the integration of time series of Sentinel-2 images and ecological expert knowledge for land cover (LC) mapping and automatic translation to habitats in coastal wetlands. In particular, the research relies on the exploitation of ecological rules based on combined information related to plant phenology, water seasonality of aquatic species, pattern zonation, and habitat geometric properties.</p><p>The methodology is applied to two Natura2000 sites, “Zone umide della Capitanata” and “Paludi presso il Golfo di Manfredonia”, located in the northeastern part of the Puglia region. These two areas are the most extensive wetlands of the Italian peninsula and the largest components of the Mediterranean wetland system.</p><p>Land Cover classes are labelled according to the FAO-LCCS taxonomy, which offers a framework to integrate EO data with in situ and ancillary data. Output habitat classes are labelled according to EUNIS habitat classification.</p>


2022 ◽  
Vol 19 (1) ◽  
pp. 47-69
Author(s):  
Paula Maria Salgado-Hernanz ◽  
Aurore Regaudie-de-Gioux ◽  
David Antoine ◽  
Gotzon Basterretxea

Abstract. We estimated pelagic primary production (PP) in the coastal (<200 m depth) Mediterranean Sea from satellite-borne data, its contribution to basin-scale carbon fixation, its variability, and long-term trends during the period 2002–2016. Annual coastal PP was estimated at 0.041 Gt C, which approximately represents 12 % of total carbon fixation in the Mediterranean Sea. About 51 % of this production occurs in the eastern basin, whereas the western and Adriatic shelves contribute with ∼25 % each of total coastal production. Strong regional variability is revealed in coastal PP, from high-production areas (>300 g C m−2) associated with major river discharges to less productive provinces (<50 g C m−2) located in the southeastern Mediterranean. PP variability in the Mediterranean Sea is dominated by interannual variations, but a notable basin-scale decline (17 %) has been observed since 2012 concurring with a period of increasing sea surface temperatures in the Mediterranean Sea and positive North Atlantic Oscillation and Mediterranean Oscillation climate indices. Long-term trends in PP reveal slight declines in most coastal areas (−0.05 to −0.1 g C m−2 per decade) except in the Adriatic where PP increases at +0.1 g C m−2 per decade. Regionalization of coastal waters based on PP seasonal patterns reveals the importance of river effluents in determining PP in coastal waters that can regionally increase up to 5-fold. Our study provides insight into the contribution of coastal waters to basin-scale carbon balances in the Mediterranean Sea while highlighting the importance of the different temporal and spatial scales of variability.


Atmosphere ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 1172
Author(s):  
M. Carmen Alvarez-Castro ◽  
Pedro Ribera

The Mediterranean region is an area where prediction at different timescales (subseasonal to decadal or even longer) is challenging. In order to help constrain future projections, the study of past climate is crucial. By improving our knowledge about the past and current climate, our confidence in understanding the future climate will be improved. In this Special Issue, information about long-term climate variability in the Mediterranean region is assessed, including in particular historical climatology and model applications to assess past climate variability, present climate evolution, and future climate projections. The seven articles included in this Special Issue explore observations, proxies, re-analyses, and models for assessing the main characteristics, processes, and variability of the Mediterranean climate. The temporal range of these articles not only covers a wide period going from the present day to as far back as 25 centuries into the past but also covers projections of future climate over the next century.


Ecosphere ◽  
2015 ◽  
Vol 6 (10) ◽  
pp. art196 ◽  
Author(s):  
Marcos Texeira ◽  
Mariano Oyarzabal ◽  
Gervasio Pineiro ◽  
Santiago Baeza ◽  
Jose Maria Paruelo

1982 ◽  
Vol 9 (1) ◽  
pp. 43-49 ◽  
Author(s):  
Patricia A. Bliss-Guest ◽  
Stjepan Keckes

Regional marine programmes are by no means a new phenomenon, the first such activity (International Council for the Exploration of the Sea, ICES) having been in operation since 1902. While in most cases early regional activities began as research programmes, they frequently provided a foundation for the management of marine living resources and, approaching the 1970s, for the control of marine pollution.The 1972 United Nations Conference on the Human Environment (Stockholm) outlined a ‘master-plan’ for protecting the world's environment which linked environmental assessment, environmental management, and supporting measures, as basic and inseparable elements—also recognizing the advantages of a regional approach in contributing to the solution of global problems. The development of UNEP's Regional Seas Programme, since the Action Plan for the Mediterranean was adopted in 1975, demonstrates that the basic concepts formulated at Stockholm can effectively foster regional cooperation among interested States, and that such cooperation can and does benefit greatly from the support of the United Nations system as a whole.The viability of any long-term regional programme lies with the political and financial commitment of the Governments concerned. Within the UNEP Regional Seas Programme this commitment is usually formalized through binding regional legal agreements, and is manifested concretely through an agreed set of activities that are revised periodically by the Governments involved. It is expected that these activities will be adequately supported by financial resources put at the disposal of each of the regional programmes primarily by the Governments concerned.Although the degree of coordination and cooperation achieved generally within the regional programmes reviewed in this paper appears to be satisfactory, it would be surprising if some difficulties did not arise. This is especially true because of the complexity of the venture and the fact that, in many cases, an entirely new type of cooperation is called for and new activities are required in geographical areas with often little experience, limited facilities, and weak infrastructures. For the most part the Governments, their national institutions, and the international, intergovernmental, and regional, organizations involved, are doing their best to work together effectively. Their resources are, however, often very limited, and so it is essential that they be utilized to the best possible advantage.UNEP, as the major financial contributor to the initial phases of the action plans developed in the framework of the Regional Seas Programme, and as their overall coordinator, has a difficult task to perform if it is to see its early successes in the Mediterranean Region matched elsewhere with real action and positive results.


1996 ◽  
Vol 45 (2) ◽  
pp. 138-159 ◽  
Author(s):  
Sandy P. Harrison ◽  
Ge Yu ◽  
Pavel E. Tarasov

AbstractLake records from northern Eurasia show regionally coherent patterns of changes during the late Quaternary. Lakes peripheral to the Scandinavian ice sheet were lower than those today but lakes in the Mediterranean zone were high at the glacial maximum, reflecting the dominance of glacial anticyclonic conditions in northern Europe and a southward shift of the Westerlies. The influence of the glacial anticyclonic circulation attenuated through the late glacial period, and the Westerlies gradually shifted northward, such that drier conditions south of the ice sheet were confined to a progressively narrower zone and the Mediterranean became drier. The early Holocene shows a gradual shift to conditions wetter than present in central Asia, associated with the expanded Asian monsoon, and in the Mediterranean, in response to local, monsoon-type circulation. There is no evidence of mid-continental aridity in northern Eurasia during the mid-Holocene. In contrast, the circum-Baltic region was drier, reflecting the increased incidence of blocking anticyclones centered on Scandinavia in summer. There is a gradual transition to modern conditions after ca. 5000 yr B.P. Although these broad-scale patterns are interrupted by shorter term fluctuations, the long-term trends in lake behavior show a clear response to changes in insolation and glaciation.


PLoS ONE ◽  
2015 ◽  
Vol 10 (3) ◽  
pp. e0119330 ◽  
Author(s):  
Dimitrios Damalas ◽  
Christos D. Maravelias ◽  
Giacomo C. Osio ◽  
Francesc Maynou ◽  
Mario Sbrana ◽  
...  

2019 ◽  
Vol 11 (9) ◽  
pp. 1028
Author(s):  
Doxaran ◽  
Bustamante ◽  
Dogliotti ◽  
Malthus ◽  
Senechal

Coastal zones are sensitive areas responding at various scales (events to long-term trends) where the monitoring and management of physico-chemical, biological, morphological processes, and fluxes are highly challenging [...]


2020 ◽  
Vol 12 (2) ◽  
pp. 1217-1243 ◽  
Author(s):  
Han Liu ◽  
Peng Gong ◽  
Jie Wang ◽  
Nicholas Clinton ◽  
Yuqi Bai ◽  
...  

Abstract. Land cover is the physical material at the surface of the Earth. As the cause and result of global environmental change, land cover change (LCC) influences the global energy balance and biogeochemical cycles. Continuous and dynamic monitoring of global LC is urgently needed. Effective monitoring and comprehensive analysis of LCC at the global scale are rare. With the latest version of GLASS (Global Land Surface Satellite) CDRs (climate data records) from 1982 to 2015, we built the first record of 34-year-long annual dynamics of global land cover (GLASS-GLC) at 5 km resolution using the Google Earth Engine (GEE) platform. Compared to earlier global land cover (LC) products, GLASS-GLC is characterized by high consistency, more detail, and longer temporal coverage. The average overall accuracy for the 34 years each with seven classes, including cropland, forest, grassland, shrubland, tundra, barren land, and snow/ice, is 82.81 % based on 2431 test sample units. We implemented a systematic uncertainty analysis and carried out a comprehensive spatiotemporal pattern analysis. Significant changes at various scales were found, including barren land loss and cropland gain in the tropics, forest gain in the Northern Hemisphere, and grassland loss in Asia. A global quantitative analysis of human factors showed that the average human impact level in areas with significant LCC was about 25.49 %. The anthropogenic influence has a strong correlation with the noticeable vegetation gain, especially for forest. Based on GLASS-GLC, we can conduct long-term LCC analysis, improve our understanding of global environmental change, and mitigate its negative impact. GLASS-GLC will be further applied in Earth system modeling to facilitate research on global carbon and water cycling, vegetation dynamics, and climate change. The GLASS-GLC data set presented in this article is available at https://doi.org/10.1594/PANGAEA.913496 (Liu et al., 2020).


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