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Soil organic carbon stock capacity in karst dolines under different land uses
Mateja Breg Valjavec, Andraž Čarni, Daniel Žlindra, Matija Zorn, Aleksander Marinšek, 2022, izvirni znanstveni članek

Povzetek: The soil organic carbon (SOC) was determined in soils of enclosed karst depressions (dolines) (NW Dinaric Mts.) to define their potential for organic carbon sequestration. SOC was measured in the forest, succession (scrubland), and grassland plots at the bottom of dolines at four depths (0–40 cm) and for 40 cm soil layer SOC stock was calculated. We demonstrated that the prevailing fine soil fractions, the C/N ratio and soil thickness play a positive role in the storage capacity of SOC in dolines regardless land use type. Grasslands have the lowest SOC storage capacity (106 t/ha/40 cm), while the highest SOC storage capacity is in succession plots (130 t/ha/40 cm). The last are covered by shrub communities dominated by Prunus spinosa, forming dense communities, and are typical of abandoned croplands or meadows that have been impacted by high levels of nutrients during cultivation phase. At this stage, there is no additional nutrient input in studied plots, which lowers the nutrient content and increases the C/N ratio. C/N ratio is the highest in the forest, where SOC stock capacity is 116 t/ha/40 cm. Given the trend towards the abandonment of agricultural land at Kras Plateau (SW Slovenia), we can expect more overgrowth of dolines, and thus an increase in carbon stocks and stabilization of organic carbon in forest soils. In contrary, we noticed the alarming decrease in grasslands and increase in urban land. The SOC storage in 2020 was for 12,538 t/ha/40 cm lower than in 2002. Although grasslands showed the lowest SOC storage, their contribution to total SOC storage in dolines is very important. Since there is a lack of studies on carbon stocks in doline soils, our research is of great importance and a novelty and gives an important background for further research on SOC stock in karst landscapes worldwide.
Ključne besede: organic carbon sequestration, karst, grassland, forests, scrubland, dolines
Objavljeno v DiRROS: 20.04.2023; Ogledov: 64; Prenosov: 41
.pdf Celotno besedilo (6,74 MB)
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Control of organic contaminants in groundwater by passive sampling and multivariate statistical analysis
Anja Koroša, Nina Mali, 2022, izvirni znanstveni članek

Povzetek: Organic contaminants in groundwater are among the most challenging chemical compound contaminants today, particularly when it comes to understanding their occurrence, origin, and relations in groundwater, as well as the transport processes, fate, and environmental impacts involved. This paper presents the use of active carbon fibre (AFC) passive sampling and multivariate statistical processing of the results to predict the possible occurrence of organic compounds (OCs) in groundwater and to determine the origin of various anthropogenic activity. This study aims to deepen our knowledge on the control of OCs in groundwater by introducing a multi-analytical and multielemental holistic approach, using the Dravsko polje aquifer, the largest intergranular aquifer in Slovenia, as an example.
Ključne besede: compounds of concern, groundwater contaminants, organic compounds, passive sampling
Objavljeno v DiRROS: 22.06.2022; Ogledov: 324; Prenosov: 127
.pdf Celotno besedilo (11,61 MB)

Passive sampling with active carbon fibres in the determination of organic pollutants in groundwater
Primož Auersperger, Anja Koroša, Nina Mali, Brigita Jamnik, 2022, izvirni znanstveni članek

Povzetek: Legislation addressing the quality of groundwater and increasing concerns over public health calls for the development of analytical methods that can produce accurate and precise results at the ppt level. Passive sampling has been recognised as a helpful tool in identifying various organic pollutants in groundwater, even when their presence had not yet been identified through conventional groundwater quality monitoring. The article presents an analytical method involving a simple and cost-effective passive sampling device using Zorflex® activated carbon fibres (ACFs) for the qualitative monitoring of a broad range of organic pollutants in water in a single run. The applicability of the method developed was tested in three hydrogeological studies. In the first case, we present a non-targeted qualitative screening and a list of 892 different contaminants detected in the groundwater in Slovenia. In the second case, we discuss the presence and origin of organic compounds in the groundwater from a pilot area of the urban aquifer, Ljubljansko polje. The third case presents a comparison of results between passive and grab sampling. Passive sampling with ACFs confirmed the presence of a pollutant, even when it had not been previously detected through a quantitative method.
Ključne besede: GC-MS, organic pollutants, qualitative analysis, passive sampling, groundwater
Objavljeno v DiRROS: 03.03.2022; Ogledov: 409; Prenosov: 184
.pdf Celotno besedilo (3,83 MB)

Short-term impacts of harvesting intensity on the upper soil layers in high karst Dinaric fir-beech forests
Emira Hukić, Matjaž Čater, Aleksander Marinšek, Mitja Ferlan, Milan Kobal, Daniel Žlindra, Hamid Čustović, Primož Simončič, 2021, izvirni znanstveni članek

Povzetek: The present study addresses the short-term effects of different harvest intensities under close-to-nature selective management on the upper soil layers in Slovenian and Bosnian Dinaric karst fir-beech forests. The different harvest intensities coincided with the single-tree and irregular shelterwood management, common in the region. The effect of harvesting intensity on the upper soil layers (Ol, Of, Ol and 0%10 cm mineral soil) was investigated by a repeated measurements experiment in Slovenia on 27 research plots in close-to nature managed forests. The properties of the upper layers (concentration of SOC and TN, C/N ratio, weights, BD and SOC stocks) were analyzed twice, before (2011) and after (2014) treatment of 50% and 100% harvest intensity in relation to the total standing growing stock of trees. As a control, we used no-treatment <20% harvesting intensity plots. To extend this experiment, we added three comparable plots from the Bosnian site: one in an old-growth forest with 0% harvest intensity and two in the managed forest with <20% harvest intensity. The results of the assessment of mean differences indicated a significant influence of harvesting intensity on the decrease in SOC, TN concentrations, weights and SOC stocks in the organic layers and the increase in BD and SOC stocks in the 0%10 cm mineral soil. The highest relative decreases in Ol, Of and Oh SOC stocks occurred in 50% (%10 and %38%) and 100% (%16 and %49%) harvest intensities. Negligible relative differences in both organic and 0%10 cm mineral layers were found for the <20% harvest intensity in the region. The change in forest light conditions resulting from differences in canopy openness as a function of applied harvest intensity explained the significant difference in the properties of the upper soil layers. The impact of the short-term losses in SOC stocks, in terms of overall soil productivity, may depend on the regeneration dynamics and melioration methods.
Ključne besede: close-to-nature forest management, harvest intensity, Calcic Cambisol, forest soil, soil organic carbon
Objavljeno v DiRROS: 10.05.2021; Ogledov: 776; Prenosov: 568
.pdf Celotno besedilo (18,42 MB)
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Emerging organic compounds in European groundwater
S. Y. Bunting, D. J. Lapworth, E. J. Crane, J. Grima-Olmedo, Anja Koroša, A. Kuczyńska, Nina Mali, L. Rosenqvist, M. E. van Vliet, A. Togola, B. Lopez, 2021, izvirni znanstveni članek

Povzetek: In Europe, emerging organic compounds (EOCs) in groundwater is a growing research area. Prioritisationfor monitoring EOCs in Europe was formalised in 2019 through the development of thefirst voluntarygroundwater watch list (GWWL). Despite this, groundwater occurrence data in the peer reviewedliterature for Europe has not been reviewed to date. Questions surrounding the effect, toxicity, move-ment in the subsurface and unsaturated zone make the process of regulating EOC use difficult. The aim inEurope is to develop a unified strategy for the classification, and prioritisation of EOCs to be monitored ingroundwater. This paper compiles evidence from the recent published studies from across Europe, since2012, when the last major literature global review of EOCs in groundwater took place. A total of 39studies were identified for review based on specific selection criteria (geography, publication date,sample size>10, inclusion of EOCs data). Data on specific compounds, and associated meta-data, arecompiled and reviewed. The two most frequently detected EOCs, carbamazepine and caffeine, occurredin groundwater at concentrations of up to 2.3 and 14.8mg/L, respectively.
Ključne besede: emerging organic chemicals, environmental exposure, groundwater contaminants, compounds of concern, groundwater hazards
Objavljeno v DiRROS: 13.01.2021; Ogledov: 1158; Prenosov: 588
.pdf Celotno besedilo (1,90 MB)

KEYLINK : towards a more integrative soil representation for inclusion in ecosystem scale models : I. : review and model concept
Gabrielle I. Deckmyn, Omar Flores, Mathias Mayer, Xavier Domene, Andrea Schnepf, Katrin Kuka, Kris van Looy, Daniel P. Rasse, Maria J.I. Briones, Sébastien Barot, Matty Berg, E. I. Vanguelova, Ivika Ostonen, Harry Vereecken, Laura Martinez Suz, Beat Frey, Aline Frossard, Alexei Tiunov, Jan Frouz, Tine Grebenc, Maarja Öpik, Mathieu Javaux, Alexei Uvarov, Olga Vindušková, Paul Henning Krogh, Oskar Franklin, Juan Jiménez, Jorge Curiel Yuste, 2020, izvirni znanstveni članek

Povzetek: The relatively poor simulation of the below-ground processes is a severe drawback for many ecosystem models, especially when predicting responses to climate change and management. For a meaningful estimation of ecosystem production and the cycling of water, energy, nutrients and carbon, the integration of soil processes and the exchanges at the surface is crucial. It is increasingly recognized that soil biota play an important role in soil organic carbon and nutrient cycling, shaping soil structure and hydrological properties through their activity, and in water and nutrient uptake by plants through mycorrhizal processes. In this article, we review the main soil biological actors (microbiota, fauna and roots) and their effects on soil functioning. We review to what extent they have been included in soil models and propose which of them could be included in ecosystem models. We show that the model representation of the soil food web, the impact of soil ecosystem engineers on soil structure and the related effects on hydrology and soil organic matter (SOM) stabilization are key issues in improving ecosystem-scale soil representation in models. Finally, we describe a new core model concept (KEYLINK) that integrates insights from SOM models, structural models and food web models to simulate the living soil at an ecosystem scale.
Ključne besede: soil fauna, model, Soil Organic Matter, SOM, hydrology, pore size distribution, PSD, soil biota, ecosystem
Objavljeno v DiRROS: 23.09.2020; Ogledov: 1155; Prenosov: 961
.pdf Celotno besedilo (5,28 MB)
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