The Experts below are selected from a list of 27198 Experts worldwide ranked by ideXlab platform

Carmen Galán - One of the best experts on this subject based on the ideXlab platform.

  • Variations in Cereal Crop phenology in Spain over the last twenty-six years (1986–2012)
    Climatic Change, 2015
    Co-Authors: Jose Oteros, Herminia García-mozo, Roser Botey, Antonio Mestre, Carmen Galán
    Abstract:

    Over recent years, the Iberian Peninsula has witnessed an increase both in temperature and in rainfall intensity, especially in the Mediterranean climate area. Plant phenology is modulated by climate, and closely governed by water availability and air temperature. Over the period 1986–2012, the effects of climate change on phenology were analyzed in five Crops at 26 sites growing in Spain (southern Europe): oats, wheat, rye, barley and maize. The phenophases studied were: sowing date, emergence, flag leaf sheath swollen, flowering, seed ripening and harvest. Trends in phenological response over time were detected using linear regression. Trends in air temperature and rainfall over the period prior to each phenophase were also charted. Correlations between phenological features, biogeographical area and weather trends were examined using a Generalized Lineal Mixed Model approach. A generalized advance in most winter-Cereal phenophases was observed, mainly during the spring. Trend patterns differed between species and phenophases. The most noticeable advance in spring phenology was recorded for wheat and oats, the “Flag leaf sheath swollen” and “Flowering date” phenophases being brought forward by around 3 days/year and 1 day/year, respectively. Temperature changes during the period prior to phenophase onset were identified as the cause of these phenological trends. Climate changes are clearly prompting variations in Cereal Crop phenology; their consequences could be even more marked if climate change persists into the next century. Changes in phenology could in turn impact Crop yield; fortunately, human intervention in Crop systems is likely to minimize the negative impact.

  • variations in Cereal Crop phenology in spain over the last twenty six years 1986 2012
    Climatic Change, 2015
    Co-Authors: Jose Oteros, Roser Botey, Antonio Mestre, Herminia Garciamozo, Carmen Galán
    Abstract:

    Over recent years, the Iberian Peninsula has witnessed an increase both in temperature and in rainfall intensity, especially in the Mediterranean climate area. Plant phenology is modulated by climate, and closely governed by water availability and air temperature. Over the period 1986–2012, the effects of climate change on phenology were analyzed in five Crops at 26 sites growing in Spain (southern Europe): oats, wheat, rye, barley and maize. The phenophases studied were: sowing date, emergence, flag leaf sheath swollen, flowering, seed ripening and harvest. Trends in phenological response over time were detected using linear regression. Trends in air temperature and rainfall over the period prior to each phenophase were also charted. Correlations between phenological features, biogeographical area and weather trends were examined using a Generalized Lineal Mixed Model approach. A generalized advance in most winter-Cereal phenophases was observed, mainly during the spring. Trend patterns differed between species and phenophases. The most noticeable advance in spring phenology was recorded for wheat and oats, the “Flag leaf sheath swollen” and “Flowering date” phenophases being brought forward by around 3 days/year and 1 day/year, respectively. Temperature changes during the period prior to phenophase onset were identified as the cause of these phenological trends. Climate changes are clearly prompting variations in Cereal Crop phenology; their consequences could be even more marked if climate change persists into the next century. Changes in phenology could in turn impact Crop yield; fortunately, human intervention in Crop systems is likely to minimize the negative impact.

Jose Oteros - One of the best experts on this subject based on the ideXlab platform.

  • Variations in Cereal Crop phenology in Spain over the last twenty-six years (1986–2012)
    Climatic Change, 2015
    Co-Authors: Jose Oteros, Herminia García-mozo, Roser Botey, Antonio Mestre, Carmen Galán
    Abstract:

    Over recent years, the Iberian Peninsula has witnessed an increase both in temperature and in rainfall intensity, especially in the Mediterranean climate area. Plant phenology is modulated by climate, and closely governed by water availability and air temperature. Over the period 1986–2012, the effects of climate change on phenology were analyzed in five Crops at 26 sites growing in Spain (southern Europe): oats, wheat, rye, barley and maize. The phenophases studied were: sowing date, emergence, flag leaf sheath swollen, flowering, seed ripening and harvest. Trends in phenological response over time were detected using linear regression. Trends in air temperature and rainfall over the period prior to each phenophase were also charted. Correlations between phenological features, biogeographical area and weather trends were examined using a Generalized Lineal Mixed Model approach. A generalized advance in most winter-Cereal phenophases was observed, mainly during the spring. Trend patterns differed between species and phenophases. The most noticeable advance in spring phenology was recorded for wheat and oats, the “Flag leaf sheath swollen” and “Flowering date” phenophases being brought forward by around 3 days/year and 1 day/year, respectively. Temperature changes during the period prior to phenophase onset were identified as the cause of these phenological trends. Climate changes are clearly prompting variations in Cereal Crop phenology; their consequences could be even more marked if climate change persists into the next century. Changes in phenology could in turn impact Crop yield; fortunately, human intervention in Crop systems is likely to minimize the negative impact.

  • variations in Cereal Crop phenology in spain over the last twenty six years 1986 2012
    Climatic Change, 2015
    Co-Authors: Jose Oteros, Roser Botey, Antonio Mestre, Herminia Garciamozo, Carmen Galán
    Abstract:

    Over recent years, the Iberian Peninsula has witnessed an increase both in temperature and in rainfall intensity, especially in the Mediterranean climate area. Plant phenology is modulated by climate, and closely governed by water availability and air temperature. Over the period 1986–2012, the effects of climate change on phenology were analyzed in five Crops at 26 sites growing in Spain (southern Europe): oats, wheat, rye, barley and maize. The phenophases studied were: sowing date, emergence, flag leaf sheath swollen, flowering, seed ripening and harvest. Trends in phenological response over time were detected using linear regression. Trends in air temperature and rainfall over the period prior to each phenophase were also charted. Correlations between phenological features, biogeographical area and weather trends were examined using a Generalized Lineal Mixed Model approach. A generalized advance in most winter-Cereal phenophases was observed, mainly during the spring. Trend patterns differed between species and phenophases. The most noticeable advance in spring phenology was recorded for wheat and oats, the “Flag leaf sheath swollen” and “Flowering date” phenophases being brought forward by around 3 days/year and 1 day/year, respectively. Temperature changes during the period prior to phenophase onset were identified as the cause of these phenological trends. Climate changes are clearly prompting variations in Cereal Crop phenology; their consequences could be even more marked if climate change persists into the next century. Changes in phenology could in turn impact Crop yield; fortunately, human intervention in Crop systems is likely to minimize the negative impact.

Roser Botey - One of the best experts on this subject based on the ideXlab platform.

  • Variations in Cereal Crop phenology in Spain over the last twenty-six years (1986–2012)
    Climatic Change, 2015
    Co-Authors: Jose Oteros, Herminia García-mozo, Roser Botey, Antonio Mestre, Carmen Galán
    Abstract:

    Over recent years, the Iberian Peninsula has witnessed an increase both in temperature and in rainfall intensity, especially in the Mediterranean climate area. Plant phenology is modulated by climate, and closely governed by water availability and air temperature. Over the period 1986–2012, the effects of climate change on phenology were analyzed in five Crops at 26 sites growing in Spain (southern Europe): oats, wheat, rye, barley and maize. The phenophases studied were: sowing date, emergence, flag leaf sheath swollen, flowering, seed ripening and harvest. Trends in phenological response over time were detected using linear regression. Trends in air temperature and rainfall over the period prior to each phenophase were also charted. Correlations between phenological features, biogeographical area and weather trends were examined using a Generalized Lineal Mixed Model approach. A generalized advance in most winter-Cereal phenophases was observed, mainly during the spring. Trend patterns differed between species and phenophases. The most noticeable advance in spring phenology was recorded for wheat and oats, the “Flag leaf sheath swollen” and “Flowering date” phenophases being brought forward by around 3 days/year and 1 day/year, respectively. Temperature changes during the period prior to phenophase onset were identified as the cause of these phenological trends. Climate changes are clearly prompting variations in Cereal Crop phenology; their consequences could be even more marked if climate change persists into the next century. Changes in phenology could in turn impact Crop yield; fortunately, human intervention in Crop systems is likely to minimize the negative impact.

  • variations in Cereal Crop phenology in spain over the last twenty six years 1986 2012
    Climatic Change, 2015
    Co-Authors: Jose Oteros, Roser Botey, Antonio Mestre, Herminia Garciamozo, Carmen Galán
    Abstract:

    Over recent years, the Iberian Peninsula has witnessed an increase both in temperature and in rainfall intensity, especially in the Mediterranean climate area. Plant phenology is modulated by climate, and closely governed by water availability and air temperature. Over the period 1986–2012, the effects of climate change on phenology were analyzed in five Crops at 26 sites growing in Spain (southern Europe): oats, wheat, rye, barley and maize. The phenophases studied were: sowing date, emergence, flag leaf sheath swollen, flowering, seed ripening and harvest. Trends in phenological response over time were detected using linear regression. Trends in air temperature and rainfall over the period prior to each phenophase were also charted. Correlations between phenological features, biogeographical area and weather trends were examined using a Generalized Lineal Mixed Model approach. A generalized advance in most winter-Cereal phenophases was observed, mainly during the spring. Trend patterns differed between species and phenophases. The most noticeable advance in spring phenology was recorded for wheat and oats, the “Flag leaf sheath swollen” and “Flowering date” phenophases being brought forward by around 3 days/year and 1 day/year, respectively. Temperature changes during the period prior to phenophase onset were identified as the cause of these phenological trends. Climate changes are clearly prompting variations in Cereal Crop phenology; their consequences could be even more marked if climate change persists into the next century. Changes in phenology could in turn impact Crop yield; fortunately, human intervention in Crop systems is likely to minimize the negative impact.

Antonio Mestre - One of the best experts on this subject based on the ideXlab platform.

  • Variations in Cereal Crop phenology in Spain over the last twenty-six years (1986–2012)
    Climatic Change, 2015
    Co-Authors: Jose Oteros, Herminia García-mozo, Roser Botey, Antonio Mestre, Carmen Galán
    Abstract:

    Over recent years, the Iberian Peninsula has witnessed an increase both in temperature and in rainfall intensity, especially in the Mediterranean climate area. Plant phenology is modulated by climate, and closely governed by water availability and air temperature. Over the period 1986–2012, the effects of climate change on phenology were analyzed in five Crops at 26 sites growing in Spain (southern Europe): oats, wheat, rye, barley and maize. The phenophases studied were: sowing date, emergence, flag leaf sheath swollen, flowering, seed ripening and harvest. Trends in phenological response over time were detected using linear regression. Trends in air temperature and rainfall over the period prior to each phenophase were also charted. Correlations between phenological features, biogeographical area and weather trends were examined using a Generalized Lineal Mixed Model approach. A generalized advance in most winter-Cereal phenophases was observed, mainly during the spring. Trend patterns differed between species and phenophases. The most noticeable advance in spring phenology was recorded for wheat and oats, the “Flag leaf sheath swollen” and “Flowering date” phenophases being brought forward by around 3 days/year and 1 day/year, respectively. Temperature changes during the period prior to phenophase onset were identified as the cause of these phenological trends. Climate changes are clearly prompting variations in Cereal Crop phenology; their consequences could be even more marked if climate change persists into the next century. Changes in phenology could in turn impact Crop yield; fortunately, human intervention in Crop systems is likely to minimize the negative impact.

  • variations in Cereal Crop phenology in spain over the last twenty six years 1986 2012
    Climatic Change, 2015
    Co-Authors: Jose Oteros, Roser Botey, Antonio Mestre, Herminia Garciamozo, Carmen Galán
    Abstract:

    Over recent years, the Iberian Peninsula has witnessed an increase both in temperature and in rainfall intensity, especially in the Mediterranean climate area. Plant phenology is modulated by climate, and closely governed by water availability and air temperature. Over the period 1986–2012, the effects of climate change on phenology were analyzed in five Crops at 26 sites growing in Spain (southern Europe): oats, wheat, rye, barley and maize. The phenophases studied were: sowing date, emergence, flag leaf sheath swollen, flowering, seed ripening and harvest. Trends in phenological response over time were detected using linear regression. Trends in air temperature and rainfall over the period prior to each phenophase were also charted. Correlations between phenological features, biogeographical area and weather trends were examined using a Generalized Lineal Mixed Model approach. A generalized advance in most winter-Cereal phenophases was observed, mainly during the spring. Trend patterns differed between species and phenophases. The most noticeable advance in spring phenology was recorded for wheat and oats, the “Flag leaf sheath swollen” and “Flowering date” phenophases being brought forward by around 3 days/year and 1 day/year, respectively. Temperature changes during the period prior to phenophase onset were identified as the cause of these phenological trends. Climate changes are clearly prompting variations in Cereal Crop phenology; their consequences could be even more marked if climate change persists into the next century. Changes in phenology could in turn impact Crop yield; fortunately, human intervention in Crop systems is likely to minimize the negative impact.

Kevin P. Smith - One of the best experts on this subject based on the ideXlab platform.

  • Quantifying Cereal Crop movement through hemispherical video analysis of agricultural plots
    Plant Methods, 2019
    Co-Authors: Alexander Q. Susko, Peter Marchetto, D. Jo Heuschele, Kevin P. Smith
    Abstract:

    Background Violent movement of Crop stems can lead to failure under high winds. Known as lodging, this phenomenon is particularly detrimental to cool-season Cereals such as oat, barley, and wheat; contributing to yield and economic losses. Phenotyping the movement of Cereal Crops in real-time could aid in the breeding and selecting of lodging resistant Cereals. Since no methods exist to quantify dynamic, real time plant responses in an agricultural setting, we devised a video analysis protocol to quantify mean frequency and amplitude of plant movement for a 360° field of view camera system. Results We present both the image analysis method for identifying predefined regions of a 2D field design as they appear on 360° field of view video, as well as a signal processing pipeline to quantify movement from time varying color signals from plot canopies within these predefined field regions. We detected significant differences in the natural frequency and amplitude of plant movement from video of 16 Cereal cultivars planted in a randomized complete block design on five different windy days. Natural frequencies quantified by this method averaged 1.37 Hz, while over 2.5-fold differences in amplitude within similar frequency ranges were detected across the 16 Cereal cultivars. Conclusions This method is sensitive enough to systematically differentiate small frequency and amplitude differences in cultivar movement, and shows promise for investigating the physiological basis for differences in Cereal movement and lodging resistance. The relative accuracy of the plot demarcation protocol suggests it could be used for other high-throughput phenotyping applications that require both high image resolution and a large field of view.

  • quantifying Cereal Crop movement through hemispherical video analysis of agricultural plots
    Plant Methods, 2019
    Co-Authors: Alexander Q. Susko, Peter M Marchetto, Jo D Heuschele, Kevin P. Smith
    Abstract:

    Violent movement of Crop stems can lead to failure under high winds. Known as lodging, this phenomenon is particularly detrimental to cool-season Cereals such as oat, barley, and wheat; contributing to yield and economic losses. Phenotyping the movement of Cereal Crops in real-time could aid in the breeding and selecting of lodging resistant Cereals. Since no methods exist to quantify dynamic, real time plant responses in an agricultural setting, we devised a video analysis protocol to quantify mean frequency and amplitude of plant movement for a 360° field of view camera system. We present both the image analysis method for identifying predefined regions of a 2D field design as they appear on 360° field of view video, as well as a signal processing pipeline to quantify movement from time varying color signals from plot canopies within these predefined field regions. We detected significant differences in the natural frequency and amplitude of plant movement from video of 16 Cereal cultivars planted in a randomized complete block design on five different windy days. Natural frequencies quantified by this method averaged 1.37 Hz, while over 2.5-fold differences in amplitude within similar frequency ranges were detected across the 16 Cereal cultivars. This method is sensitive enough to systematically differentiate small frequency and amplitude differences in cultivar movement, and shows promise for investigating the physiological basis for differences in Cereal movement and lodging resistance. The relative accuracy of the plot demarcation protocol suggests it could be used for other high-throughput phenotyping applications that require both high image resolution and a large field of view.