Climate change impacts on rainfed agriculture in the Guadiana river basin (Portugal)

Valverde, Pedro; Carvalho, Mário de; Serralheiro, Ricardo; Maia, Rodrigo; Ramos, Vanessa Martins; Oliveira, Bruno

doi:10.1016/j.agwat.2014.11.008

Cited by 45 publications

(30 citation statements)

References 12 publications

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“…An important vulnerability of rainfed agriculture in the Mediterranean is the combination of high air temperature and water deficit coupled to marked inter-annual and intra-annual climate variability and scarce water resources (Costa et al, 2007;Lopes et al, 2014;Rogiers and Clarke, 2013;Valverde et al, 2015). In the case of Vitis vinifera, Mediterranean climate may limit yield and berry quality because most of the berry growth and ripening period occurs under conditions of high air temperature and soil water deficit (Medrano et al, 2003;Chaves et al, 2007Chaves et al, , 2010 Lereboullet et al, 2013a,b;.…”

Section: Constraints (Environment and Socio-economic)mentioning

confidence: 99%

Modern viticulture in southern Europe: Vulnerabilities and strategies for adaptation to water scarcity

Costa

Vaz

Escalona

et al. 2016

Agricultural Water Management

170

114

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b s t r a c tWater is now considered the most important but vulnerable resource in the Mediterranean region. Nevertheless, irrigation expanded fast in the region (e.g. South Portugal and Spain) to mitigate environmental stress and to guarantee stable grape yield and quality. Sustainable wine production depends on sustainable water use in the wine's supply chain, from the vine to the bottle. Better understanding of grapevine stress physiology (e.g. water relations, temperature regulation, water use efficiency), more robust crop monitoring/phenotyping and implementation of best water management practices will help to mitigate climate effects and will enable significant water savings in the vineyard and winery. In this paper, we focused on the major vulnerabilities and opportunities of South European Mediterranean viticulture (e.g. in Portugal and Spain) and present a multi-level strategy (from plant to the consumer) to overcome region's weaknesses and support strategies for adaptation to water scarcity, promote sustainable water use and minimize the environmental impact of the sector. © 2015 Published by Elsevier B.V. The wine grape industry in south Mediterranean EuropeWorld's wine production are located in a wide geographical Q2and climatic range, often in mid-latitude regions characterized by climate variability and stressful environments, such as the Mediterranean region (Fraga et al., 2013;Lionello et al., 2014). The European Union , is the world's leader in wine production with about 50% of world's vine-growing area and about 60% of total volume of production (USDA, 2014). France, Italy, Spain, Germany and Portugal are the five leading EU wine producers and altogether they represent 90% of EU production (USDA, 2014). Spain has the largest vineyard area in the world (950,541 ha in 2014) with an increasing irrigated area (36% of the total, in 2014) (MAGRAMA, 2014) (Fig. 1). Portugal is the EU's 5th largest wine producer with a total of 6.7 Mhl in 2013 and it has a cultivated area estimated to be about 224,000 ha (IVV, 2015). In 2010, the irrigated area was estimated in 15% of the total area of vineyards (INE, 2010). However, irrigation continued expanding in the recent years in Portugal, in particular in the Alentejo region, and presently, the percentage of irrigated vines should be slightly higher and around 20%. * Corresponding author.E-mail address: miguelc@itqb.unl.pt (J.M. Costa).Mediterranean fresh water resources are under high pressure due to fast-growing population, increased water scarcity, extreme climate variability and intensive water use in agriculture, industry and tourism activities (Lange et al., 2005;Costa et al., 2007; EEA, 2012a,b; Lereboullet et al., 2013a,b;Blum, 2014). Water is now considered by EU experts as the most important but vulnerable resource in the Mediterranean region (EU-ERANETMED, 2014). In addition, climate scenarios for South Mediterranean Europe are not favourable for agriculture. The predicted lower precipitation, higher air and soil temperatures, more frequent and l...

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Section: Constraints (Environment and Socio-economic)mentioning

confidence: 99%

Modern viticulture in southern Europe: Vulnerabilities and strategies for adaptation to water scarcity

Costa

Vaz

Escalona

et al. 2016

Agricultural Water Management

170

114

View full text Add to dashboard Cite

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“…There is evidence that precipitation has decreased and temperatures increased in MCRs over the last century, which are probably associated with CC [11][12][13][14]. In addition, most climate models forecast further decreases in precipitation and temperature increases in MCRs by the end of the 21st century [2,15,16].…”

Section: Climate Change Effects On Mediterranean Agriculturementioning

confidence: 99%

Climate Change Impacts and Adaptation Strategies of Agriculture in Mediterranean-Climate Regions (MCRs)

et al. 2019

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The world’s five Mediterranean-climate regions (MCRs) share unique climatic regimes of mild, wet winters and warm and dry summers. Agriculture in these regions is threatened by increases in the occurrence of drought and high temperature events associated with climate change (CC). In this review we analyze what would be the effects of CC on crops (including orchards and vineyards), how crops and cropping and farming systems could adapt to CC, and what are the social and economic impacts, as well as the strategies used by producers to adapt to CC. In rainfed areas, water deficit occurs mostly during the flowering and grain filling stages (terminal drought stress), which has large detrimental effects on the productivity of crops. Orchards and vineyards, which are mostly cultivated in irrigated areas, will also be vulnerable to water deficit due to a reduction in water available for irrigation and an increase in evapotranspiration. Adaptation of agriculture to CC in MCRs requires integrated strategies that encompass different levels of organization: the crop (including orchards and vineyards), the cropping system (sequence of crops and management techniques used on a particular agricultural field) and the farming system, which includes the farmer.

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“…below 1.8 t ha À1 ) increased from 8% to 24%, where the highest differences were observed in the northeastern and southeastern regions and in the flat areas. In Portugal, Valverde et al (2015) used a water balance approach combined with the Stewart method and CMIP3 climate projections datasets and simulated yield losses between 6% and 10% for the 2011-2041 period, and 11-19% for the 2041-2070 period. In these southern regions, sunflower will be more prone to the direct effect of heat stress at anthesis and drought during its growing cycle if no adaptation is introduced.…”

Section: Impacts On Crop Yieldmentioning

confidence: 99%

Sunflower crop and climate change: vulnerability, adaptation, and mitigation potential from case-studies in Europe

Debaeke¹,

Casadebaig²,

Flénet

et al. 2017

OCL

113

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-Climate change is characterized by higher temperatures, elevated atmospheric CO 2 concentrations, extreme climatic hazards, and less water available for agriculture. Sunflower, a springsown crop often cultivated in southern and eastern regions of Europe, could be more vulnerable to the direct effect of heat stress at anthesis and drought during its growing cycle, both factors resulting in severe yield loss, oil content decrease, and fatty acid alterations. Adaptations through breeding (earliness, stress tolerance), crop management (planting dates), and shifting of growing areas could be developed, assessed and combined to partly cope with these negative impacts. New cultivation opportunities could be expected in northern parts of Europe where sunflower is not grown presently and where it could usefully contribute to diversify cereal-based cropping systems. In addition, sunflower crop could participate to the mitigation solution as a low greenhouse gas emitter compared to cereals and oilseed rape. Sunflower crop models should be revised to account for these emerging environmental factors in order to reduce the uncertainties in yield and oil predictions. The future of sunflower in Europe is probably related to its potential adaptation to climate change but also to its competitiveness and attractiveness for food and energy.Keywords: CO 2 / temperature / crop model / biotic stress / water deficit Résumé -Culture du tournesol et changement climatique : vulnérabilité, adaptation et potentiel d'atténuation via des études de cas en Europe. Le changement climatique se caractérise par des températures élevées, de plus fortes concentrations atmosphériques en CO 2 , des risques climatiques extrêmes et moins d'eau disponible pour l'agriculture. Le tournesol, culture semée au printemps dans le sud et l'est de l'Europe, pourrait être plus exposé à l'avenir aux fortes températures et à un déficit hydrique marqué dès la floraison, avec pour conséquences des pertes de rendement, une diminution de la teneur en huile et une altération de la composition en acides gras. Des adaptations sont possibles à court et moyen terme par la sélection (précocité, tolérance aux stress), la conduite de culture (date de semis) et le déplacement des zones de production, permettant de faire face en partie aux impacts négatifs attendus. Ainsi le tournesol pourrait être cultivé plus au nord participant utilement à la nécessaire diversification des bassins céréaliers. En outre, la culture de tournesol étant faiblement émettrice de gaz à effet de serre par rapport aux céréales ou au colza pourrait contribuer davantage à la solution climatique apportée par l'agriculture. Les modèles de culture devraient être revus pour mieux tenir compte de ces facteurs environnementaux émergents si l'on veut réduire les incertitudes dans les prédictions de rendement et de teneur en huile. L'avenir du tournesol en Europe est probablement lié à son potentiel d'adaptation au changement climatique, mais dépendra aussi de sa compétitivité et de son attractivité en t...

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Climate change impacts on rainfed agriculture in the Guadiana river basin (Portugal)

Cited by 45 publications

References 12 publications

Modern viticulture in southern Europe: Vulnerabilities and strategies for adaptation to water scarcity

Modern viticulture in southern Europe: Vulnerabilities and strategies for adaptation to water scarcity

Climate Change Impacts and Adaptation Strategies of Agriculture in Mediterranean-Climate Regions (MCRs)

Sunflower crop and climate change: vulnerability, adaptation, and mitigation potential from case-studies in Europe

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