David A. Ramírez

ORCID: 0000-0003-4546-9745
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About
Contact & Profiles
Research Areas
  • Potato Plant Research
  • Plant Water Relations and Carbon Dynamics
  • Soil Carbon and Nitrogen Dynamics
  • Ecology and Vegetation Dynamics Studies
  • Plant Pathogens and Resistance
  • Irrigation Practices and Water Management
  • Greenhouse Technology and Climate Control
  • Fire effects on ecosystems
  • Tree-ring climate responses
  • Remote Sensing in Agriculture
  • Rangeland and Wildlife Management
  • Leaf Properties and Growth Measurement
  • Spectroscopy and Chemometric Analyses
  • Plant responses to water stress
  • Horticultural and Viticultural Research
  • Plant Ecology and Soil Science
  • Soil erosion and sediment transport
  • Rice Cultivation and Yield Improvement
  • Mycotoxins in Agriculture and Food
  • Soil Geostatistics and Mapping
  • Hydrology and Watershed Management Studies
  • Plant Virus Research Studies
  • Mediterranean and Iberian flora and fauna
  • Forest ecology and management
  • Agricultural Systems and Practices

International Potato Center
2015-2024

University of Quindío
2024

Universidade Federal de Lavras
2024

Universidad Nacional Agraria La Molina
2006-2022

Gansu Agricultural University
2016-2019

University of Castilla-La Mancha
2008-2018

Mississippi Delta Community College
2009

University of Alicante
2006-2007

Dominica State College
1995

Experiments suggest that biodiversity enhances the ability of ecosystems to maintain multiple functions, such as carbon storage, productivity, and buildup nutrient pools (multifunctionality). However, relationship between multifunctionality has never been assessed globally in natural ecosystems. We report here on a global empirical study relating plant species richness abiotic factors drylands, which collectively cover 41% Earth's land surface support over 38% human population....

10.1126/science.1215442 article EN Science 2012-01-12

Abstract Aim Geographical, climatic and soil factors are major drivers of plant beta diversity, but their importance for dryland communities is poorly known. The aim this study was to: (1) characterize patterns diversity in global drylands; (2) detect common environmental diversity; (3) test thresholds conditions driving potential shifts species composition. Location Global. Methods Beta quantified 224 from 22 geographical regions on all continents except Antarctica using four complementary...

10.1111/jbi.12377 article EN Journal of Biogeography 2014-07-21

Abstract The Andean region is the most important center of potato diversity in world. global warming trend which has taken place since 1950s, that 2-3 times reported and continuous presence extreme events makes this a live laboratory to study impact climate change. In review, we first present current knowledge on change Andes, as compared changes other mountain areas, globe general. Then, review describes ecophysiological strategies cope adapt atmospheric CO 2 levels, temperature soil water...

10.1515/opag-2018-0029 article EN cc-by Open Agriculture 2018-07-01

Abstract Multiple ecosystem functions need to be considered simultaneously manage and protect the several services that are essential people their environments. Despite this, cost effective, tangible, relatively simple globally relevant methodologies monitor in situ soil multifunctionality, is, provision of multiple by soils, have not been tested at global scale. We combined correlation analysis structural equation modelling explore whether we could find easily measured, field‐based...

10.1111/1365-2664.13540 article EN publisher-specific-oa Journal of Applied Ecology 2019-11-15

Fire is a major factor controlling global carbon (C) and nitrogen (N) cycling. While direct C N losses caused by combustion have been comparably well established, important knowledge gaps remain on postfire losses. Here, we quantified both as gaseous (N2 O, NO N2 ) leaching after high-intensity experimental fire in an old shrubland central Spain. Combustion of were 9.4 Mg C/ha 129 kg N/ha, respectively, representing 66% 58% initial aboveground vegetation litter stocks. Moreover, strongly...

10.1111/gcb.14388 article EN Global Change Biology 2018-07-11

We investigated the extent to which plant water and nutrient status are affected by intraspecific competition intensity microsite quality in a monodominant tussock grassland. Leaf gas exchange stable isotope measurements were used assess relations of Stipa tenacissima tussocks growing along gradient cover soil depth semi-arid catchment Southeast Spain. Stomatal conductance photosynthetic rate decreased with increasing during wet season, leading foliar delta(18)O delta(13)C enrichment. A high...

10.1111/j.1365-3040.2009.02002.x article EN Plant Cell & Environment 2009-06-10

Abstract Aims Climate and human impacts are changing the nitrogen ( N ) inputs losses in terrestrial ecosystems. However, it is largely unknown how these two major drivers of global change will simultaneously influence cycle drylands, largest biome on planet. We conducted a observational study to evaluate aridity impacts, together with biotic abiotic factors, affect key soil variables cycle. Location Two hundred twenty‐four dryland sites from all continents except A ntarctica widely...

10.1111/geb.12382 article EN Global Ecology and Biogeography 2015-10-07

Accurate determination of plant water status is mandatory to optimize irrigation scheduling and thus maximize yield. Infrared thermography (IRT) can be used as a proxy for detecting stomatal closure measure stress. In this study, an open-source software (Thermal Image Processor (TIPCIP)) that includes image processing techniques such thermal-visible segmentation morphological operations was developed estimate the crop stress index (CWSI) in potato crops. Results were compared CWSI derived...

10.3390/s20020472 article EN cc-by Sensors 2020-01-14

The search for plant traits associated with drought tolerance genetic improvement is an important issue in breeding acceleration programs. However, expression depends on the scenario, thus investigation of this dependence crucial tolerant related selection crops like potato. In study, six potato genotypes contrasted sensitivity were submitted to a long- (LTWR) from flower budding formation until harvest and short-term (STWR, 4 cycles) water restriction compared irrigated condition (control)....

10.1016/j.scienta.2019.05.052 article EN cc-by Scientia Horticulturae 2019-06-04
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