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Giorgos Maneas
Department of Physical Geography, Stockholm University, 10691 Stockholm, Sweden

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Journal article
Published: 31 March 2021 in Atmosphere
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The Eastern Mediterranean is a highly populated area with air quality problems. It is also where climate change is already noticed by higher temperatures and s changing precipitation pattern. The anthropogenic aerosol affects health and changing concentrations and properties of the atmospheric aerosol affect radiation balance and clouds. Continuous long-term observations are essential in assessing the influence of anthropogenic aerosols on climate and health. We present six years of observations from Navarino Environmental Observatory (NEO), a new station located at the south west tip of Peloponnese, Greece. The two sites at NEO, were evaluated to show the influence of the local meteorology and to assess the general background aerosol possible. It was found that the background aerosol was originated from aged European aerosols and was strongly influenced by biomass burning, fossil fuel combustion, and industry. When subsiding into the boundary layer, local sources contributed in the air masses moving south. Mesoscale meteorology determined the diurnal variation of aerosol properties such as mass and number by means of typical sea breeze circulation, giving rise to pronounced morning and evening peaks in pollutant levels. While synoptic scale meteorology, mainly large-scale air mass transport and precipitation, strongly influenced the seasonality of the aerosol properties.

ACS Style

Hans-Christen Hansson; Peter Tunved; Radovan Krejci; Eyal Freud; Nikos Kalivitis; Tabea Hennig; Giorgos Maneas; Evangelos Gerasopoulos. The Atmospheric Aerosol over Western Greece-Six Years of Aerosol Observations at the Navarino Environmental Observatory. Atmosphere 2021, 12, 445 .

AMA Style

Hans-Christen Hansson, Peter Tunved, Radovan Krejci, Eyal Freud, Nikos Kalivitis, Tabea Hennig, Giorgos Maneas, Evangelos Gerasopoulos. The Atmospheric Aerosol over Western Greece-Six Years of Aerosol Observations at the Navarino Environmental Observatory. Atmosphere. 2021; 12 (4):445.

Chicago/Turabian Style

Hans-Christen Hansson; Peter Tunved; Radovan Krejci; Eyal Freud; Nikos Kalivitis; Tabea Hennig; Giorgos Maneas; Evangelos Gerasopoulos. 2021. "The Atmospheric Aerosol over Western Greece-Six Years of Aerosol Observations at the Navarino Environmental Observatory." Atmosphere 12, no. 4: 445.

Preprint content
Published: 04 March 2021
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The EUs Water Framework Directive, was adopted on October 2000, and it has been the basis for water management in all the EU countries since then (EU-WFD, 2000). According to the EUs-WFD, the use of groundwater bodies can be considered as sustaibale only when the portion of the overall recharge not needed by the ecology is abstracted (EU-WFD, 2000). Nonetheless, there are still cases where the implementation of the EUs-WFD faces challenges, and there is a need to better communicate the above message to water users. But how can we achieve this at a local scale?

In this work, we present the example of SW Messinia, Greece, an interlinked coastal-inland area in the Eastern Mediterranean region. In this case study, the water supply for all water uses (agriculture, tourism, domestic use) depends on groundwater resources which are also the main freshwater provider to a coastal wetland with high ecological and commercial value (Birds directive 2009/147/EC; Habitats Directive 92/43/EEC). Due to man-made interventions over the last 70 years, the wetland has passed the tipping point of being brackish (Maneas et al., 2019), and at present it is characterized as saline with hypersaline conditions for nearly 30% of the year (Manzoni et al., 2020). Unless freshwater inputs are enhanced by restoring hydrologic connectivity between the wetland and the surrounding freshwater bodies, salinity in the lagoon is expected to increase even more under future drier and warmer conditions (Manzoni et al., 2020). But how can we balance between societal and ecological groundwater needs, and how future decision making can get a broader acceptance by the society?

Under COASTAL EU project (COASTAL, 2019), we use System Dynamic (SD) models for communicating with local stakeholders towards improving land-sea interactions. In this work, we present a model which describes how inland groundwater abstraction has impacts to the wetland’s salinity. The model is used as a basis for a discussion with stakeholders and the co-creation of sustainable decision making with broader acceptance.

Literature

EU WFD, 2000. Available at: https://ec.europa.eu/environment/water/water-framework/index_en.html (Accessed on 20-01-2021).

Birds Directive 2009/147/EC (2009). The European Union Birds Directive. Available online at: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=
CELEX:32009L0147 (accessed November 2, 2020) .

Habitats Directive 92/43/EEC (1992). The European Union Habitats Directive. Available online at: https://ec.europa.eu/environment/nature/legislation/
habitatsdirective/index_en.htm (accessed September 2, 2019).

Maneas, G., Makopoulou, E., Bousbouras, D., Berg, H., and Manzoni, S. (2019). Anthropogenic changes in a Mediterranean coastal wetland during the last century-the case of Gialova Lagoon, Messinia, Greece. Water 11:350. doi: 10.3390/w11020350 

Manzoni, S., Maneas, G., Scaini, A., Psiloglou, B. E., Destouni, G., and Lyon, S. W. (2020). Understanding coastal wetland conditions and futures by closing their hydrologic balance: the case of Gialova Lagoon, Greece. Hydrol. Earth Syst. Sci. 24, 3557–3571. doi: 10.5194/hess-24-3557-2020

Maneas G, Bousbouras D, Norrby V and Berg H (2020). Status and Distribution of Waterbirds in a Natura 2000 Area: The Case of Gialova Lagoon, Messinia, Greece. Front. Ecol. Evol. 8:501548. doi: 10.3389/fevo.2020.501548

COASTAL [Collaborative Land-Sea Integration Platform] (2019). European Union’s H2020 Research and Innovation Programme Under Grant Agreement No. 773782. Available online at: https://h2020-coastal.eu/ (accessed 03 February, 2019).

ACS Style

Giorgos Maneas; Erasmia Kastanidi; Ioannis Panagopoulos. System-Dynamic models for groundwater management in SW Messinia, Greece. . 2021, 1 .

AMA Style

Giorgos Maneas, Erasmia Kastanidi, Ioannis Panagopoulos. System-Dynamic models for groundwater management in SW Messinia, Greece. . . 2021; ():1.

Chicago/Turabian Style

Giorgos Maneas; Erasmia Kastanidi; Ioannis Panagopoulos. 2021. "System-Dynamic models for groundwater management in SW Messinia, Greece. ." , no. : 1.

Original research article
Published: 22 December 2020 in Frontiers in Ecology and Evolution
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Located at the south-western most part of the Balkan peninsula, along an important migration route (the Mediterranean/Black Sea Flyway), the Gialova Lagoon wetland is one of the few remaining Important Bird Areas (IBAs) along the south-west coast of Greece, also designated as a Special Protection Area. The wetland serves as the first suitable stopover for many spring migrants who have flown non-stop over the Mediterranean Sea, and the last before their journey back to Africa in the autumn. In this study, we conducted monthly field visits during the period October 2016 to January 2019 with the aim to complement existing information about the site, to evaluate the current status and distribution of waterbirds, to provide insights for the management of the area and to re-assess the IBA/Ramsar criteria. A total of 149 bird species representing 43 families and 15 orders were recorded, including 36 threatened species at an International, European or/and national level, and 40 species listed in the Annex I of the EUs Birds Directive (21 species were listed as both threatened and under Annex I). 81 species were identified as wetland related species, of which 66 species were identified as waterbirds (7 orders, 11 families). Waterbirds richness and abundance were higher during the Wet season and corresponding periods (Wintering and Spring migration). All parts of the wetland supported waterbirds and threatened species, with the S. Wetland sub-area being the most diverse during the Breeding/Nesting, and both migration periods. The abundance of most waterbirds and IBA species have declined over the last 20 years, but this does not necessarily mean that the area no longer fulfills Ramsar criterion 6 (and equivalent IBA criterion A4i). However, this outcome should not be overlooked by the site managers and conservation actions, such as the restoration of fresh water inflows which could improve habitats and water conditions for IUCN and IBA species, should be implemented with high priority. In addition, our results indicate that the area meets Ramsar criterion 4 and criterion 2, and thus we suggest that it should be further investigated and evaluated to potentially become the eleventh Greek Ramsar site.

ACS Style

Giorgos Maneas; Dimitris Bousbouras; Viggo Norrby; Håkan Berg. Status and Distribution of Waterbirds in a Natura 2000 Area: The Case of Gialova Lagoon, Messinia, Greece. Frontiers in Ecology and Evolution 2020, 8, 1 .

AMA Style

Giorgos Maneas, Dimitris Bousbouras, Viggo Norrby, Håkan Berg. Status and Distribution of Waterbirds in a Natura 2000 Area: The Case of Gialova Lagoon, Messinia, Greece. Frontiers in Ecology and Evolution. 2020; 8 ():1.

Chicago/Turabian Style

Giorgos Maneas; Dimitris Bousbouras; Viggo Norrby; Håkan Berg. 2020. "Status and Distribution of Waterbirds in a Natura 2000 Area: The Case of Gialova Lagoon, Messinia, Greece." Frontiers in Ecology and Evolution 8, no. : 1.

Journal article
Published: 10 December 2020 in Sustainability
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People perceive the importance of benefits from ecosystem services in different ways, depending on their values, beliefs, and needs. Acknowledging and integrating this diversity into decision-making processes can support informed natural resource management. Our empirical study unpicks the multiple ways stakeholder groups perceive the benefits derived from wetland ecosystem services (WES) in the area surrounding the “Gialova” coastal wetland in Messenia, Greece. The inhabitants from this region benefit from a range of WES, and most livelihoods are closely linked to agriculture and tourism. We aim to understand the patterns in commonly held stakeholder views on WES using “Q methodology”, a participatory mixed-methods approach. We identified five distinct perspectives on WES from a sample of 32 stakeholders. Alongside diverse perceptions of the relative importance of different WES, we observed a range of explanations of why certain WES are important and analyzed these through the lens of “value pluralism”. This identified tension between relational and instrumental values. Such analyses move beyond ecosystem service identification towards an understanding of value justifications and conflicts, and can support the deliberation of conflicted views, and policy design in alignment with people’s values.

ACS Style

Sofia Maniatakou; Håkan Berg; Giorgos Maneas; Tim Daw. Unravelling Diverse Values of Ecosystem Services: A Socio-Cultural Valuation Using Q Methodology in Messenia, Greece. Sustainability 2020, 12, 10320 .

AMA Style

Sofia Maniatakou, Håkan Berg, Giorgos Maneas, Tim Daw. Unravelling Diverse Values of Ecosystem Services: A Socio-Cultural Valuation Using Q Methodology in Messenia, Greece. Sustainability. 2020; 12 (24):10320.

Chicago/Turabian Style

Sofia Maniatakou; Håkan Berg; Giorgos Maneas; Tim Daw. 2020. "Unravelling Diverse Values of Ecosystem Services: A Socio-Cultural Valuation Using Q Methodology in Messenia, Greece." Sustainability 12, no. 24: 10320.

Special issue
Published: 27 August 2020 in International Social Science Journal
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In response to the interconnected character of societal challenges, there is a growing interest in transdisciplinary sustainability research. However, for transdisciplinary research to be able to support the generation of new knowledge in a participatory and reflexive manner, a number of challenges have been identified in each stage of the transdisciplinary research process. In this paper, we respond specifically to the challenge of initiating transdisciplinary research projects, by proposing a process for performing transdisciplinary project scoping. Our group of early‐career researchers share experiences from scoping for transdisciplinary research potential, bridging local stakeholder needs with researchers’ interests across departments and national contexts. We present our methodological approach,which includes tools for stakeholder identification, systems thinking, and gap‐mapping. The approach was applied in the local context of the Navarino Environmental Observatory, Messinia, Greece. The findings identify regional sustainability concerns related to, for example, tourism, agriculture, and environmental management issues. The gap‐map highlights overlaps (e.g., in terms of existing research on the effects of agriculture on water resources), but also how previous research has been conducted on spatial and temporal scales not directly relevant to local actors. We believe that the approach can be used beyond this case study to identify the potential for problem‐oriented inter‐and transdisciplinary research.

ACS Style

Therese Bennich; Giorgos Maneas; Sofia Maniatakou; Luigi Piemontese; Christina Schaffer; Marie Schellens; Carl Österlin. Transdisciplinary research for sustainability: scoping for project potential. International Social Science Journal 2020, 1 .

AMA Style

Therese Bennich, Giorgos Maneas, Sofia Maniatakou, Luigi Piemontese, Christina Schaffer, Marie Schellens, Carl Österlin. Transdisciplinary research for sustainability: scoping for project potential. International Social Science Journal. 2020; ():1.

Chicago/Turabian Style

Therese Bennich; Giorgos Maneas; Sofia Maniatakou; Luigi Piemontese; Christina Schaffer; Marie Schellens; Carl Österlin. 2020. "Transdisciplinary research for sustainability: scoping for project potential." International Social Science Journal , no. : 1.

Journal article
Published: 15 July 2020 in Hydrology and Earth System Sciences
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Coastal wetlands and lagoons are under pressure due to competing demands for freshwater resources and climatic changes, which may increase salinity and cause a loss of ecological functions. These pressures are particularly high in Mediterranean regions with high evaporative demand compared to precipitation. To manage such wetlands and maximize their provision of ecosystem services, their hydrologic balance must be quantified. However, multiple channels, diffuse surface water exchanges, and diverse groundwater pathways complicate the quantification of different water balance components. To overcome this difficulty, we developed a mass balance approach based on coupled water and salt balance equations to estimate currently unknown water exchange fluxes through the Gialova lagoon, southwestern Peloponnese, Greece. Our approach facilitates quantification of both saline and freshwater exchange fluxes, using measured precipitation, water depth and salinity, and estimated evaporation rates over a study period of 2 years (2016–2017). While water exchanges were dominated by evaporation and saline water inputs from the sea during the summer, precipitation and freshwater inputs were more important during the winter. About 40 % and 60 % of the freshwater inputs were from precipitation and lateral freshwater flows, respectively. Approximately 70 % of the outputs was due to evaporation, with the remaining 30 % being water flow from the lagoon to the sea. Under future drier and warmer conditions, salinity in the lagoon is expected to increase, unless freshwater inputs are enhanced by restoring hydrologic connectivity between the lagoon and the surrounding freshwater bodies. This restoration strategy would be fundamental to stabilizing the current wide seasonal fluctuations in salinity and maintain ecosystem functionality but could be challenging to implement due to expected reductions in water availability in the freshwater bodies supporting the lagoon.

ACS Style

Stefano Manzoni; Giorgos Maneas; Anna Scaini; Basil E. Psiloglou; Georgia Destouni; Steve W. Lyon. Understanding coastal wetland conditions and futures by closing their hydrologic balance: the case of the Gialova lagoon, Greece. Hydrology and Earth System Sciences 2020, 24, 3557 -3571.

AMA Style

Stefano Manzoni, Giorgos Maneas, Anna Scaini, Basil E. Psiloglou, Georgia Destouni, Steve W. Lyon. Understanding coastal wetland conditions and futures by closing their hydrologic balance: the case of the Gialova lagoon, Greece. Hydrology and Earth System Sciences. 2020; 24 (7):3557-3571.

Chicago/Turabian Style

Stefano Manzoni; Giorgos Maneas; Anna Scaini; Basil E. Psiloglou; Georgia Destouni; Steve W. Lyon. 2020. "Understanding coastal wetland conditions and futures by closing their hydrologic balance: the case of the Gialova lagoon, Greece." Hydrology and Earth System Sciences 24, no. 7: 3557-3571.

Data description paper
Published: 13 May 2020 in Earth System Science Data
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Geography and associated hydrological, hydroclimate and land-use conditions and their changes determine the states and dynamics of wetlands and their ecosystem services. The influences of these controls are not limited to just the local scale of each individual wetland but extend over larger landscape areas that integrate multiple wetlands and their total hydrological catchment – the wetlandscape. However, the data and knowledge of conditions and changes over entire wetlandscapes are still scarce, limiting the capacity to accurately understand and manage critical wetland ecosystems and their services under global change. We present a new Wetlandscape Change Information Database (WetCID), consisting of geographic, hydrological, hydroclimate and land-use information and data for 27 wetlandscapes around the world. This combines survey-based local information with geographic shapefiles and gridded datasets of large-scale hydroclimate and land-use conditions and their changes over whole wetlandscapes. Temporally, WetCID contains 30-year time series of data for mean monthly precipitation and temperature and annual land-use conditions. The survey-based site information includes local knowledge on the wetlands, hydrology, hydroclimate and land uses within each wetlandscape and on the availability and accessibility of associated local data. This novel database (available through PANGAEA https://doi.org/10.1594/PANGAEA.907398; Ghajarnia et al., 2019) can support site assessments; cross-regional comparisons; and scenario analyses of the roles and impacts of land use, hydroclimatic and wetland conditions, and changes in whole-wetlandscape functions and ecosystem services.

ACS Style

Navid Ghajarnia; Georgia Destouni; Josefin Thorslund; Zahra Kalantari; Imenne Åhlén; Jesús A. Anaya-Acevedo; Juan F. Blanco-Libreros; Sonia Borja; Sergey Chalov; Aleksandra Chalova; Kwok P. Chun; Nicola Clerici; Amanda Desormeaux; Bethany B. Garfield; Pierre Girard; Olga Gorelits; Amy Hansen; Fernando Jaramillo; Jerker Jarsjö; Adnane Labbaci; John Livsey; Giorgos Maneas; Kathryn McCurley Pisarello; Sebastián Palomino-Ángel; Jan Pietroń; René M. Price; Victor H. Rivera-Monroy; Jorge Salgado; A. Britta K. Sannel; Samaneh Seifollahi-Aghmiuni; Ylva Sjöberg; Pavel Terskii; Guillaume Vigouroux; Lucia Licero-Villanueva; David Zamora. Data for wetlandscapes and their changes around the world. Earth System Science Data 2020, 12, 1083 -1100.

AMA Style

Navid Ghajarnia, Georgia Destouni, Josefin Thorslund, Zahra Kalantari, Imenne Åhlén, Jesús A. Anaya-Acevedo, Juan F. Blanco-Libreros, Sonia Borja, Sergey Chalov, Aleksandra Chalova, Kwok P. Chun, Nicola Clerici, Amanda Desormeaux, Bethany B. Garfield, Pierre Girard, Olga Gorelits, Amy Hansen, Fernando Jaramillo, Jerker Jarsjö, Adnane Labbaci, John Livsey, Giorgos Maneas, Kathryn McCurley Pisarello, Sebastián Palomino-Ángel, Jan Pietroń, René M. Price, Victor H. Rivera-Monroy, Jorge Salgado, A. Britta K. Sannel, Samaneh Seifollahi-Aghmiuni, Ylva Sjöberg, Pavel Terskii, Guillaume Vigouroux, Lucia Licero-Villanueva, David Zamora. Data for wetlandscapes and their changes around the world. Earth System Science Data. 2020; 12 (2):1083-1100.

Chicago/Turabian Style

Navid Ghajarnia; Georgia Destouni; Josefin Thorslund; Zahra Kalantari; Imenne Åhlén; Jesús A. Anaya-Acevedo; Juan F. Blanco-Libreros; Sonia Borja; Sergey Chalov; Aleksandra Chalova; Kwok P. Chun; Nicola Clerici; Amanda Desormeaux; Bethany B. Garfield; Pierre Girard; Olga Gorelits; Amy Hansen; Fernando Jaramillo; Jerker Jarsjö; Adnane Labbaci; John Livsey; Giorgos Maneas; Kathryn McCurley Pisarello; Sebastián Palomino-Ángel; Jan Pietroń; René M. Price; Victor H. Rivera-Monroy; Jorge Salgado; A. Britta K. Sannel; Samaneh Seifollahi-Aghmiuni; Ylva Sjöberg; Pavel Terskii; Guillaume Vigouroux; Lucia Licero-Villanueva; David Zamora. 2020. "Data for wetlandscapes and their changes around the world." Earth System Science Data 12, no. 2: 1083-1100.

Preprint content
Published: 18 December 2019
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Geography and associated hydrological, hydroclimate and land use conditions and their changes determine the states and dynamics of wetlands and their ecosystem services. The influences of these controls are not limited to just the local scale of each individual wetland, but extend over larger landscape areas that integrate multiple wetlands and their total hydrological catchment – the wetlandscape. However, the data and knowledge of conditions and changes over entire wetlandscapes are still scarce, limiting the capacity to accurately understand and manage critical wetland ecosystems and their services under global change. We present a new database, consisting of geographic, hydrological, hydroclimate and land use information and data for 27 wetlandscapes around the world. This combines survey-based local information with geographic shapefiles and gridded datasets of large-scale hydroclimate and land use conditions and their changes over whole wetlandscapes. Temporally, the database contains 30-year time series of data for mean monthly precipitation and temperature, and annual land use conditions. The survey-based site information includes local knowledge on the wetlands, hydrology, hydroclimate and land uses within each wetlandscape, and on the availability and accessibility of associated local data. This novel database (available through PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.907398; Ghajarnia et al., 2019) can support site assessments, cross-regional comparisons, and scenario analyses of the roles and impacts of land use, hydroclimatic and wetland conditions and changes on whole-wetlandscape functions and ecosystem services.

ACS Style

Navid Ghajarnia; Georgia Destouni; Josefin Thorslund; Zahra Kalantari; Imenne Åhlén; Jesús A. Anaya-Acevedo; Juan F. Blanco-Libreros; Sonia Borja; Sergey Chalov; Aleksandra Chalova; Kwok P. Chun; Nicola Clerici; Amanda Desormeaux; Bethany B. Garfield; Pierre Girard; Olga Gorelits; Amy Hansen; Fernando Jaramillo; Jerker Jarsjö; Adnane Labbaci; John Livsey; Giorgos Maneas; Kathryn McCurley; Sebastián Palomino-Ángel; Jan Pietroń; René Price; Victor H. Rivera-Monroy; Jorge Salgado; A. Britta K. Sannel; Samaneh Seifollahi-Aghmiuni; Ylva Sjöberg; Pavel Terskii; Guillaume Vigouroux; Lucia Licero-Villanueva; David Zamora. Data for wetlandscapes and their changes around the world. 2019, 2019, 1 -20.

AMA Style

Navid Ghajarnia, Georgia Destouni, Josefin Thorslund, Zahra Kalantari, Imenne Åhlén, Jesús A. Anaya-Acevedo, Juan F. Blanco-Libreros, Sonia Borja, Sergey Chalov, Aleksandra Chalova, Kwok P. Chun, Nicola Clerici, Amanda Desormeaux, Bethany B. Garfield, Pierre Girard, Olga Gorelits, Amy Hansen, Fernando Jaramillo, Jerker Jarsjö, Adnane Labbaci, John Livsey, Giorgos Maneas, Kathryn McCurley, Sebastián Palomino-Ángel, Jan Pietroń, René Price, Victor H. Rivera-Monroy, Jorge Salgado, A. Britta K. Sannel, Samaneh Seifollahi-Aghmiuni, Ylva Sjöberg, Pavel Terskii, Guillaume Vigouroux, Lucia Licero-Villanueva, David Zamora. Data for wetlandscapes and their changes around the world. . 2019; 2019 ():1-20.

Chicago/Turabian Style

Navid Ghajarnia; Georgia Destouni; Josefin Thorslund; Zahra Kalantari; Imenne Åhlén; Jesús A. Anaya-Acevedo; Juan F. Blanco-Libreros; Sonia Borja; Sergey Chalov; Aleksandra Chalova; Kwok P. Chun; Nicola Clerici; Amanda Desormeaux; Bethany B. Garfield; Pierre Girard; Olga Gorelits; Amy Hansen; Fernando Jaramillo; Jerker Jarsjö; Adnane Labbaci; John Livsey; Giorgos Maneas; Kathryn McCurley; Sebastián Palomino-Ángel; Jan Pietroń; René Price; Victor H. Rivera-Monroy; Jorge Salgado; A. Britta K. Sannel; Samaneh Seifollahi-Aghmiuni; Ylva Sjöberg; Pavel Terskii; Guillaume Vigouroux; Lucia Licero-Villanueva; David Zamora. 2019. "Data for wetlandscapes and their changes around the world." 2019, no. : 1-20.

Preprint content
Published: 19 August 2019
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ACS Style

Stefano Manzoni; Giorgos Maneas; Anna Scaini; Basil E. Psiloglou; Georgia Destouni; Steve W. Lyon. Supplementary material to "Understanding coastal wetland conditions and futures by closing their hydrologic balance: the case of Gialova lagoon, Greece". 2019, 1 .

AMA Style

Stefano Manzoni, Giorgos Maneas, Anna Scaini, Basil E. Psiloglou, Georgia Destouni, Steve W. Lyon. Supplementary material to "Understanding coastal wetland conditions and futures by closing their hydrologic balance: the case of Gialova lagoon, Greece". . 2019; ():1.

Chicago/Turabian Style

Stefano Manzoni; Giorgos Maneas; Anna Scaini; Basil E. Psiloglou; Georgia Destouni; Steve W. Lyon. 2019. "Supplementary material to "Understanding coastal wetland conditions and futures by closing their hydrologic balance: the case of Gialova lagoon, Greece"." , no. : 1.

Preprint content
Published: 19 August 2019
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Coastal wetlands and lagoons are under pressure due to competing demands for freshwater resources and climatic changes, which may increase salinity and cause loss of ecological functions. These pressures are particularly high in Mediterranean regions with high evaporative demand compared to precipitation. To manage such wetlands and maximize their provision of ecosystem services, their hydrologic balance must be quantified. However, multiple channels, diffuse surface water exchanges, and diverse groundwater pathways complicate the quantification of different water balance components. To overcome this difficulty, we developed a mass balance approach based on coupled water and salt balance equations to estimate currently unknown water exchange fluxes through the Gialova lagoon, SW Peloponnese, Greece. Our approach facilitates quantification of both saline and freshwater exchange fluxes, using measured precipitation, water depth and salinity, and estimated evaporation rates over a study period of two years (2016–2017). While water exchanges were dominated by evaporation and saline water inputs from the sea during the summer, precipitation and freshwater inputs were more important during the winter. About 40 % and 60 % of the freshwater inputs were from precipitation and lateral freshwater flows, respectively. Approximately 70 % of the outputs was due to evaporation, with the remaining 30 % being water flow from the lagoon to the sea. Under future drier and warmer conditions, salinity in the lagoon is expected to increase, unless freshwater inputs are enhanced by restoring hydrologic connectivity between the lagoon and the surrounding freshwater bodies. This restoration strategy would be fundamental to stabilize the current wide seasonal fluctuations in salinity and maintain ecosystem functionality, but could be challenging to implement due to expected reductions in water availability in the freshwater bodies supporting the lagoon.

ACS Style

Stefano Manzoni; Giorgos Maneas; Anna Scaini; Basil E. Psiloglou; Georgia Destouni; Steve W. Lyon. Understanding coastal wetland conditions and futures by closing their hydrologic balance: the case of Gialova lagoon, Greece. 2019, 2019, 1 -28.

AMA Style

Stefano Manzoni, Giorgos Maneas, Anna Scaini, Basil E. Psiloglou, Georgia Destouni, Steve W. Lyon. Understanding coastal wetland conditions and futures by closing their hydrologic balance: the case of Gialova lagoon, Greece. . 2019; 2019 ():1-28.

Chicago/Turabian Style

Stefano Manzoni; Giorgos Maneas; Anna Scaini; Basil E. Psiloglou; Georgia Destouni; Steve W. Lyon. 2019. "Understanding coastal wetland conditions and futures by closing their hydrologic balance: the case of Gialova lagoon, Greece." 2019, no. : 1-28.

Journal article
Published: 24 April 2019 in Ecological Indicators
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Modern intensive agricultural practices are causing stress on ecosystems worldwide, with the loss of biodiversity due to decreased landscape heterogeneity as well as high use of synthetic agro-chemicals. Organic farming is seen as an effective way of counteracting this trend. Despite this, relatively little research has been carried out on the effects of olive farming on biodiversity in Greece. This study uses bioacoustic monitoring for a first order assessment of the bird diversity in olive groves. It uses acoustic indices to compare the soundscape of eleven organic and eleven conventional olive groves in Messinia in southern Greece. Three bioacoustics indices: the Acoustic Complexity Index (ACI), the Acoustic Diversity Index (ADI) and the Bioacoustic Index (BIO) were used. Olive groves under organic farming had significantly higher values for the ACI and BIO indices, and a higher but not significant different value for the ADI index. Organic groves showed a much more heterogeneous and complex structure with a mixture of tree species and varying canopy height than conventional groves. Landscape variables were similar between management practices and did not influence the index results. Site level variables, especially underlying vegetation height, had a significant influence on the ACI and BIO indices. Our results suggest that bioacoustic indices could provide a cost effective and non-intrusive way for bird diversity monitoring.

ACS Style

David Myers; Håkan Berg; Giorgos Maneas. Comparing the soundscapes of organic and conventional olive groves: A potential method for bird diversity monitoring. Ecological Indicators 2019, 103, 642 -649.

AMA Style

David Myers, Håkan Berg, Giorgos Maneas. Comparing the soundscapes of organic and conventional olive groves: A potential method for bird diversity monitoring. Ecological Indicators. 2019; 103 ():642-649.

Chicago/Turabian Style

David Myers; Håkan Berg; Giorgos Maneas. 2019. "Comparing the soundscapes of organic and conventional olive groves: A potential method for bird diversity monitoring." Ecological Indicators 103, no. : 642-649.

Review
Published: 19 February 2019 in Water
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Human interventions during the last 70 years have altered the characteristics of the Gialova Lagoon, a coastal wetland that is part of a wider Natura 2000 site. In this study, we explore how human interventions and climate altered the wetland’s hydrological conditions and habitats, leading to changing wetland functions over time. Our interpretations are based on a mixed methodological approach combining conceptual hydrologic models, analysis of aerial photographs, local knowledge, field observations, and GIS (Geographic Information System) analyses. The results show that the combined effects of human interventions and climate have led to increased salinity in the wetland over time. As a result, the fresh and brackish water marshes have gradually been turned into open water or replaced by halophytic vegetation with profound ecological implications. Furthermore, current human activities inside the Natura 2000 area and in the surrounding areas could further impact on the water quantity and quality in the wetland, and on its sensitive ecosystems. We suggest that a more holistic understanding of the broader socio-ecological system is needed to understand the dynamics of the wetland and to achieve sustainable long-term management and conservation strategies.

ACS Style

Giorgos Maneas; Eirini Makopoulou; Dimitris Bousbouras; Håkan Berg; Stefano Manzoni. Anthropogenic Changes in a Mediterranean Coastal Wetland during the Last Century—The Case of Gialova Lagoon, Messinia, Greece. Water 2019, 11, 350 .

AMA Style

Giorgos Maneas, Eirini Makopoulou, Dimitris Bousbouras, Håkan Berg, Stefano Manzoni. Anthropogenic Changes in a Mediterranean Coastal Wetland during the Last Century—The Case of Gialova Lagoon, Messinia, Greece. Water. 2019; 11 (2):350.

Chicago/Turabian Style

Giorgos Maneas; Eirini Makopoulou; Dimitris Bousbouras; Håkan Berg; Stefano Manzoni. 2019. "Anthropogenic Changes in a Mediterranean Coastal Wetland during the Last Century—The Case of Gialova Lagoon, Messinia, Greece." Water 11, no. 2: 350.

Journal article
Published: 09 July 2018 in Horticulturae
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Olive farming is one of the most important occupations in Messenia, Greece. The region is considered the largest olive producer in the country and it is recognized as a Protected Designation of Origin (PDO) for Kalamata olive oil, which is considered extra fine. In response to the declining trend of organic olive farming in Greece, this study assesses to what extent organic olive farming in Messenia provides a financially and environmentally competitive alternative to conventional olive farming. In this study, 39 olive farmers (23 conventional and 16 organic) participated in interviews based on questionnaires. The results showed that organic olive farming is significantly more profitable than conventional farming, primarily because of a higher price for organic olive oil. Despite this, the majority of the conventional farmers perceived a low profit from organic farming as the main constraint to organic olive farming. All farmers agreed that organic olive farming contributed to a better environment, health and quality of olive oil. Organic farmers used fewer synthetic pesticides and fertilizers and applied more environmentally-friendly ground vegetation management techniques than conventional farmers. Overall, organic farming was found to provide a competitive and sustainable alternative to conventional olive farming in Messenia.

ACS Style

Håkan Berg; Giorgos Maneas; Amanda Salguero Engström. A Comparison between Organic and Conventional Olive Farming in Messenia, Greece. Horticulturae 2018, 4, 15 .

AMA Style

Håkan Berg, Giorgos Maneas, Amanda Salguero Engström. A Comparison between Organic and Conventional Olive Farming in Messenia, Greece. Horticulturae. 2018; 4 (3):15.

Chicago/Turabian Style

Håkan Berg; Giorgos Maneas; Amanda Salguero Engström. 2018. "A Comparison between Organic and Conventional Olive Farming in Messenia, Greece." Horticulturae 4, no. 3: 15.

Conference paper
Published: 05 October 2007 in Remote Sensing
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Spatial interpolation methods are widely applied in marine studies to evaluate the spatial distribution of oceanographic parameters and inter-compare time series of maps of selected variables. A variety of such methods are nowadays available and therefore, selection of the most appropriate for a specific case study is not an easy task. Within geography and other spatially oriented disciplines, and most of the times in the framework of a Geographical Information System, several attempts have been carried out to assess the efficiency of various spatial interpolators using diverse methodologies. In this paper, an attempt was carried out to evaluate the accuracy of spatial interpolators for mapping the distribution of organic carbon (weight %), an important indicator of marine sediments in the marine environment. Measurements of organic carbon were carried out in a network of 20 sampling sites in the Gulf of Gera, which is representative of a semi-enclosed and shallow marine ecosystem at the south-eastern part of the island of Lesvos, Greece. For the interpolators under study, the cross-validation error was calculated at each sampling station and calculation of the RMSE (root-mean-square error), the MAE (mean-absolute error) and the MBE (mean-bias error) was carried out to assess the accuracy of their performance. The results revealed the most appropriate interpolator for the given dataset which was then applied to develop the thematic map of the spatial distribution of organic carbon. Discussion on the potential increase of the surface accuracy is also carried out.

ACS Style

D. Kitsiou; T. Nitis; M. N. Kostopoulou; N. Maravelakis; G. Maneas. Evaluation of spatial interpolators in the framework of a geographical information system: a case study using oceanographic data. Remote Sensing 2007, 67490C -67490C-8.

AMA Style

D. Kitsiou, T. Nitis, M. N. Kostopoulou, N. Maravelakis, G. Maneas. Evaluation of spatial interpolators in the framework of a geographical information system: a case study using oceanographic data. Remote Sensing. 2007; ():67490C-67490C-8.

Chicago/Turabian Style

D. Kitsiou; T. Nitis; M. N. Kostopoulou; N. Maravelakis; G. Maneas. 2007. "Evaluation of spatial interpolators in the framework of a geographical information system: a case study using oceanographic data." Remote Sensing , no. : 67490C-67490C-8.