Datos de investigación
Effect of biological soil crust (BSCs) composition on early establishment of vascular plants in eroded soils
Publicador:
Consejo Nacional de Investigaciones Científicas y Técnicas
Fecha de depósito:
21/03/2024
Fecha de creación:
01/04/2019-01/10/2019
Resumen
En este estudio, nos propusimos evaluar cómo afecta la composición de la costra biológica en la germinación y el establecimiento temprano de dos especies de plantas vasculares (Noticastrum marginatum y Jarava juncoide) presentes en áreas erosionadas de las Sierras Grandes de Córdoba, en el centro de Argentina. Para tal fin realizamos un experimento de laboratorio colocando semillas de las dos especies de plantas sobre distintos tipos de cobertura de suelo: cubierto por Diploschistes spp., Xanthoparmelia spp., Cladonia spp., Polytrichum sp. y un tratamiento control de suelo desnudo. Evaluamos el número de semillas germinadas y plántulas establecidas durante dos meses.
Métodos
Samples of soil covered with biological crusts were taken from an area in the Sierras Grandes de Córdoba, Argentina, 31°36'05.4"S, 64°51'44.8"W. The treatments were determined according to the dominant component of the BSC at the site: bryophytic or any of the three lichen growth forms, crustose, foliose or fruticose (including dimorphic lichens). Treatments with BSCs were composed as follows: bryophytes (Polytrichum sp.); crustose lichens (Diploschistes spp., mainly D. conceptionis and D. scruposus); foliose lichens (Xanthoparmelia spp. mainly X. taractica and X. santesonii), and fruticose lichens Cladonia spp. (mainly C. fimbriata, C. pixidata and C. melanopoda). Samples were placed on plastic trays (12 x 15 x 4 cm), with 15 trays being used for each treatment. Control treatment consisted of 15 trays containing bare soil obtained from the same collection site. Seeds (n=10) of each of the vascular plant species, N. marginatum and J. juncoides, were placed on the surface on these substrates. The trays were placed in a germination chamber under standardized environmental conditions: 25/15 °C and 12/12 h (light/darkness) photoperiod (Funes et al. 1999). Trays were regularly irrigated with distilled water to control moisture (Funes et al. 2009). Germination and early establishment were recorded every three days during two months. The criterion for germination was radicle emergence (2 mm); the results are expressed as percentage of germinated seeds (ISTA 2011). The criterion for determining early establishment was the presence of true leaves during the first two months after germination, a period considered sufficient to evaluate establishment of these species (García & Villamil 2001). Each individual was identified visually and species were identified with a pin of different color, which allowed us to measure survival.
Palabras clave:
CRIPTÓGAMAS,
JARAVA JUNCOIDES,
LIQUENES,
MUSGOS,
NOTICASTRUM MARGINATUM
Alcance geográfico
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Colecciones
Datos de Investigación(IIBYT)
Datos de Investigación de INSTITUTO DE INVESTIGACIONES BIOLOGICAS Y TECNOLOGICAS
Datos de Investigación de INSTITUTO DE INVESTIGACIONES BIOLOGICAS Y TECNOLOGICAS
Citación
Djukanovich-iturbe, Milenka; Herrero, María Lucrecia; Rodriguez, Juan Manuel; (2024): Effect of biological soil crust (BSCs) composition on early establishment of vascular plants in eroded soils. Consejo Nacional de Investigaciones Científicas y Técnicas. (dataset). http://hdl.handle.net/11336/231186
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