Identification of hydrologic and geochemical pathways using high frequency sampling, REE aqueous sampling and soil characterization at Koiliaris Critical Zone Observatory, Crete

Moraetis, Daniel; Stamati, Fotini; Kotronakis, Manolis; Fragia, Tasoula; Paranychnianakis, Nikolaos; Nikolaidis, Nikolaos P.

doi:10.1016/j.apgeochem.2011.03.055

Cited by 14 publications

(12 citation statements)

References 10 publications

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“…The Koiliaris CZO occupies an area of approximately 130 km 2 and is characterized by an intense topography extending from sea level to 2100 m. More details on Koiliaris CZO with regard to prevailing climatic conditions, pedology, soil evolution, and land use can be found in Moraetis et al . (, ).…”

Section: Methodsmentioning

confidence: 99%

“…The watershed consists of soils depleted in soil organic carbon and severely degraded due to intense agricultural practices and overgrazing. The Koiliaris CZO occupies an area of approximately 130 km 2 and is characterized by an intense topography extending from sea level to 2100 m. More details on Koiliaris CZO with regard to prevailing climatic conditions, pedology, soil evolution, and land use can be found in Moraetis et al (2011Moraetis et al ( , 2014.…”

Section: Study Area Descriptionmentioning

confidence: 99%

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Environmental drivers of soil microbial community distribution at the Koiliaris Critical Zone Observatory

Tsiknia

Paranychianakis

Varouchakis

et al. 2014

FEMS Microbiol Ecol

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Data on soil microbial community distribution at large scales are limited despite the important information that could be drawn with regard to their function and the influence of environmental factors on nutrient cycling and ecosystem services. This study investigates the distribution of Archaea, Bacteria and Fungi as well as the dominant bacterial phyla (Acidobacteria, Actinobacteria, Bacteroidetes, Firmicutes), and classes of Proteobacteria (Alpha- and Betaproteobacteria) across the Koiliaris watershed by qPCR and associate them with environmental variables. Predictive maps of microorganisms distribution at watershed scale were generated by co-kriging, using the most significant predictors. Our findings showed that 31-79% of the spatial variation in microbial taxa abundance could be explained by the parameters measured, with total organic carbon and pH being identified as the most important. Moreover, strong correlations were set between microbial groups and their inclusion on variance explanation improved the prediction power of the models. The spatial autocorrelation of microbial groups ranged from 309 to 2.226 m, and geographic distance, by itself, could explain a high proportion of their variation. Our findings shed light on the factors shaping microbial communities at a high taxonomic level and provide evidence for ecological coherence and syntrophic interactions at the watershed scale.

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Section: Methodsmentioning

confidence: 99%

Section: Study Area Descriptionmentioning

confidence: 99%

Environmental drivers of soil microbial community distribution at the Koiliaris Critical Zone Observatory

Tsiknia

Paranychianakis

Varouchakis

et al. 2014

FEMS Microbiol Ecol

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“…Due to chemical weathering of the primary minerals in rocks, the re-distribution of REE in weathering products has been the subject of attention for the past several decades (Hill et al, 2000;Patino et al, 2003). While REE may accumulate on particulates or in certain size fractions of nano-colloids (Moraetis et al, 2011;Neubauer, 2013), it may lead to fractionation of specific elements in particulate phases. REE fractionation has been observed within specific soil horizons (Germund, 2004;Stille et al, 2006) and in carbonate dominated areas (Johannesson et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Geochemistry of rare earth elements in soils under different land uses in a typical karst area, Guizhou Province, Southwest China

2017

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“…The redistribution of REE in the products of chemical weathering has been the subject of attention for several decades , which, in recent years, has shifted to tracing metal speciation, binding to naturally occurring colloids including organic matter (OM), and their transfer in different environments . Although, REE may accumulate on particulate matter or on nano‐colloids of some specific sizes , the process may lead to fractionation of specific elements in the particulate phases. Such fractionation of REE has been observed within specific soil horizons and in carbonate‐dominated areas .…”

Section: Introductionmentioning

confidence: 99%

Organic Matter Impact on Distribution of Rare Earth Elements in Soil Under Different Land Uses

Han

Tang

2017

CLEAN Soil Air Water

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This study investigated the enrichment and fractionation of rare earth elements (REE) in soils with different soil organic carbon (SOC) concentrations under diverse land uses. The results indicated that there were significant and important differences in soil REE behavior. Their fractionation was strongly and negatively correlated to the middle REE (MREE) and SOC implying that soil organic matter (SOM) acts as the host phase for the REE. Higher total REE concentrations in sites dominated by C4 plants than those dominated by C3 plants, and the significant negative correlation between δ13C and MREE indicated that the organic functional groups that adsorb REE change with the stable isotope composition of SOC. This observation demonstrates the potential use of REE for tracing natural influences on behavior of SOC in the profiles of SOC‐rich soils.

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Identification of hydrologic and geochemical pathways using high frequency sampling, REE aqueous sampling and soil characterization at Koiliaris Critical Zone Observatory, Crete

Cited by 14 publications

References 10 publications

Environmental drivers of soil microbial community distribution at the Koiliaris Critical Zone Observatory

Environmental drivers of soil microbial community distribution at the Koiliaris Critical Zone Observatory

Geochemistry of rare earth elements in soils under different land uses in a typical karst area, Guizhou Province, Southwest China

Organic Matter Impact on Distribution of Rare Earth Elements in Soil Under Different Land Uses

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