Characterization of water dissolved organic matter under woody vegetation patches in semi-arid Mediterranean soils

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Título: Characterization of water dissolved organic matter under woody vegetation patches in semi-arid Mediterranean soils
Autor/es: Cerdán, Mar | Sanchez Sanchez, Antonio | Jordá Guijarro, Juana Dolores | Amat Martínez, Beatriz | Cortina, Jordi | Ruiz-Vicedo, Nieves | El-Khattabi, Mounir
Grupo/s de investigación o GITE: Química Agrícola | Gestión de Ecosistemas y de la Biodiversidad (GEB)
Centro, Departamento o Servicio: Universidad de Alicante. Departamento de Agroquímica y Bioquímica | Universidad de Alicante. Departamento de Ecología | Universidad de Alicante. Instituto Multidisciplinar para el Estudio del Medio "Ramón Margalef"
Palabras clave: TOC | DOC | Fumaric | Phenols | Aridity
Área/s de conocimiento: Edafología y Química Agrícola | Ecología
Fecha de publicación: 15-may-2016
Editor: Elsevier
Cita bibliográfica: Science of The Total Environment. 2016, 553: 340-348. doi:10.1016/j.scitotenv.2016.02.091
Resumen: Woody patches in semiarid environments favor the establishment of other plants. Facilitation may be favored by an increase in soil fertility. Dissolved organic matter (DOM), is the most active fraction of soil organic matter and may contain compounds affecting plant establishment, as allelochemicals, hormone-like substances and metal carriers. However, information on DOM contents and composition in these environments is scarce. In this paper, we study the impact of woody patches on DOM in Stipa tenacissima L. steppes and discuss its implications for community dynamics. DOM under patch- and inter-patch areas, was analyzed for elemental composition, UV–Vis indices and organic acid content. Element concentration and composition in DOM, and organic acid concentration were similar in patch- and inter-patch areas. Yet, soils under patches were richer in DOC, aromatic species and organic acids (particularly fumaric acid) than soils in inter-patch areas. Dominant species affected organic matter concentration and quality in complex ways. Thus, patches dominated by Ephedra fragilis showed higher concentrations of TOC and aromatics than those dominated by other species. Rhamnus lycioides patches showed the highest accumulation of fumaric acid, which may contribute to its successful recruitment rate and expansion in the area. Our results show substantial differences in the amount and composition of DOM and specific compounds affecting soil functionality and plant dynamics. Further studies on the effects of such changes on seedling performance are needed to increase our understanding of plant–plant interactions in semiarid environments.
Patrocinador/es: The research is funded by the Spanish Ministry of Science and Innovation (projects UNCROACH, CGL2011-30581-C02-01 and GRACCIE Programa Consolider-Ingenio 2010, CSD2007-00067), the Spanish Ministry of the Environment, Rural and Marine Areas (Project RECUVES; 077/RN08/04.1) and Generalitat Valenciana (Programa G. Forteza; FPA/2009/029).
URI: http://hdl.handle.net/10045/63197
ISSN: 0048-9697 (Print) | 1879-1026 (Online)
DOI: 10.1016/j.scitotenv.2016.02.091
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: © 2016 Elsevier B.V.
Revisión científica: si
Versión del editor: http://dx.doi.org/10.1016/j.scitotenv.2016.02.091
Aparece en las colecciones:INV - GEB - Artículos de Revistas
INV - Química Agrícola - Artículos de Revistas

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