Fine roots of Prosopis flexuosa trees in the field. Plant and soil variables that control their growth and depth distribution
| العنوان: | Fine roots of Prosopis flexuosa trees in the field. Plant and soil variables that control their growth and depth distribution |
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| المؤلفون: | Aranzazú Guevara, Leandro Mastrantonio, Verónica A. Pancotto, Carla Valeria Giordano |
| المصدر: | Plant Ecology. 219:1399-1412 |
| بيانات النشر: | Springer Science and Business Media LLC, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | 0106 biological sciences, Prosopis, SOIL CORE AUGER, Plant Science, 010603 evolutionary biology, 01 natural sciences, Ciencias Biológicas, RHIZOTRON, PHENOLOGY, SOIL FERTILITY, Water content, Ciencias de las Plantas, Botánica, Topsoil, Ecology, biology, Rhizotron, Vegetation, SOIL WATER CONTENT, biology.organism_classification, Arid, Agronomy, ROOT PROLIFERATION, Soil water, Environmental science, Soil fertility, CIENCIAS NATURALES Y EXACTAS, 010606 plant biology & botany |
| الوصف: | Fine root growth in natural vegetation is difficult to predict due to its regulation by soil and plant factors. Field studies in arid ecosystems show a variety of root responses to soil resources and to plant aboveground phenology that sometimes differ from root responses predicted by controlled experiments. There is a pressing need to cover a greater diversity of plant species and ecological scenarios in field studies. In this paper, we have studied fine roots of Prosopis flexuosa trees living with or without access to phreatic water in an inter-dune valley and a dune flank, respectively, in the Central Monte Desert, Argentina. We have described fine root growth over time and at different depths by rhizotron observations and soil core auger samples in relation to soil water and nutrients, tree crown phenology, plant water and nutrient status. We have found that surface soil moisture from rainfall is the variable that best predicts seasonal topsoil fine root growth. Access to groundwater advanced leaf sprouting with respect to rainfall, but did not advance root growth that stayed linked to rainfall in valley and dune flank trees. Trees without access to phreatic water produced deeper and thicker or denser roots, which is consistent with the poor soil resource content of dunes. Variations in rainfall dynamics due to global climate change may have a particular impact on fine roots and ecosystem processes such as biogeochemistry and carbon budget in dune flank trees as well as in valley trees. Fil: Guevara, Aranzazú. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; Argentina Fil: Pancotto, Veronica Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Mastrantonio, Leandro Eloy. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias; Argentina Fil: Giordano, Carla Valeria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; Argentina |
| وصف الملف: | application/pdf |
| تدمد: | 1573-5052 1385-0237 |
| DOI: | 10.1007/s11258-018-0889-0 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2e2424d69a280501e825396846cd3f8 https://doi.org/10.1007/s11258-018-0889-0 |
| Rights: | RESTRICTED |
| رقم الانضمام: | edsair.doi.dedup.....f2e2424d69a280501e825396846cd3f8 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15735052 13850237 |
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| DOI: | 10.1007/s11258-018-0889-0 |