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Plant-induced differentiation of soil variables and nematode community structure in a Mediterranean serpentine ecosystem


TitlePlant-induced differentiation of soil variables and nematode community structure in a Mediterranean serpentine ecosystem
Publication TypeJournal Article
Year of Publication2014
AuthorsMonokrousos N, Charalampidis G, Boutsis G, Sousanidou V, Papatheodorou EM, Argyropoulou MD
JournalSoil Research
Volume52
Issue6
Pagination593-603
KeywordsGreece, Heavy metals, maquis, nematode functional profile, phrygana, ultramafic soil
Abstract

Abiotic and biotic components of a serpentine Mediterranean soil were studied in terms of heavy metal and nutrient concentrations, microbial biomass, and structural and functional characteristics of the soil nematode community. We explored differentiations of the soil environment imposed by vegetation, sampling the bare soil and soil under /Buxus sempervirens/, /Juniperus oxycedrus/, /Cistus creticus/ and /Thymus sibthorpii/. Organic matter, microbial biomass, nutrient availability and calcium/magnesium (Ca/Mg) ratio of the serpentine site were similar to those of degraded, non-serpentine Mediterranean ecosystems; the serpentine site showed potassium deficiency and high heavy metal load. Soil nematode abundance, especially of phytoparasites, was very low. Low enrichment and structure indices and high channel index values indicated a degraded, low-resource, stressful environment where fungal decomposition predominates. There was no differentiation of heavy metal concentrations among microsites. Bare soil exhibited high pH, low water content, low Ca/Mg (0.68), low nutrient concentrations, low abundance of most nematode groups, low values of maturity and plant parasitic indices, low nematode diversity and a distinct generic composition. Rhizosphere soil was differentiated according to the evergreen–sclerophyllous or seasonal–dimorphic habit of shrubs. This was reflected in soil nutrients and in all parameters of the soil nematode community.  

URLhttp://dx.doi.org/10.1071/SR14011
DOI10.1071/SR14011
Short TitleNematodes in serpentine mediterranean soils
Refereed DesignationRefereed