Artículo
Effects of phytochemical crusts formed under two desert shrubs on physical properties of soils in arid ecosystems
Fecha de publicación:
09/2022
Editorial:
Elsevier
Revista:
Journal of Arid Environments
ISSN:
0140-1963
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Xerophytic shrubs are usually dominant in arid environments. Because of environmental pressures both biotic and abiotic, many plants have developed a huge diversity of carbon based secondary metabolites (CBSM). Several functions have been found for these CBSM, although their fate after being released is not clear. One of the hypothesis, tested here, is that CBSM accumulate in the soil under the plant's canopy. Particularly, we tested the hypothesis that terpene and polyphenolic resins present in Grindelia chiloensis (Asteraceae) and Larrea divaricata (Zigophyllaceae) would accumulate in the soil under their canopies and change its physical properties. Our results show that resins accumulate in the soil, and increase hardiness and hydrophobicity, while they reduce water infiltration. These changes in soil properties, compared to non-CBSM producing shrubs and bare soil, were more evident close to the plants' center and decreased towards the edge and surrounding soil. As they alter water dynamics, chemical crusts may have consequences both to the individual plant and to the ecosystem, and should be present in other arid lands, outside Patagonia.
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Identificadores
Colecciones
Articulos(CCT - PATAGONIA CONFLUENCIA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA CONFLUENCIA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA CONFLUENCIA
Citación
Rajnoch, María Gimena; Pérez, D. R.; Ravetta, Damián Andrés; Effects of phytochemical crusts formed under two desert shrubs on physical properties of soils in arid ecosystems; Elsevier; Journal of Arid Environments; 204; 9-2022; 1-8
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