{"type": "FeatureCollection", "features": [{"id": "10.1021/acs.est.3c01816", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-28T16:17:26Z", "type": "Journal Article", "created": "2023-09-08", "title": "Effects of Climate Change on Soil Organic Matter C and H Isotope Composition in a Mediterranean Savannah (Dehesa): An Assessment Using Py-CSIA", "description": "Dehesas are Mediterranean agro-sylvo-pastoral systems sensitive to climate change. Extreme climate conditions forecasted for Mediterranean areas may change soil C turnover, which is of relevance for soil biogeochemistry modeling. The effect of climate change on soil organic matter (SOM) is investigated in a field experiment mimicking environmental conditions of global change scenarios (soil temperature increase, +2-3 \u00b0C, W; rainfall exclusion, 30%, D; a combination of both, W+D). Pyrolysis-compound-specific isotope analysis (Py-CSIA) is used for C and H isotope characterization of SOM compounds and to forecast trends exerted by the induced climate shift. After 2.5 years, significant \u03b413C and \u03b42H isotopic enrichments were detected. Observed short- and mid-chain n-alkane \u03b413C shifts point to an increased microbial SOM reworking in the W treatment; a 2H enrichment of up to 40\u2030 of lignin methoxyphenols was found when combining W+D treatments under the tree canopy, probably related to H fractionation due to increased soil water evapotranspiration. Our findings indicate that the effect of the tree canopy drives SOM dynamics in dehesas and that, in the short term, foreseen climate change scenarios will exert changes in the SOM dynamics comprising the biogeochemical C and H cycles.", "keywords": ["2. Zero hunger", "Take urgent action to combat climate change and its impacts", "Analytical pyrolysis", "Climate Change", "biomarkers", "nalyticalpyrolysis", "15. Life on land", "Mediterranean soil", "Trees", "\u03b42H", "\u03b413C \u03b42H", "Soil", "Isotopes", "13. Climate action", "Alkanes", "\u03b413C", "Climate change", "http://metadata.un.org/sdg/13", "climatechange", "Biomarkers", "Pyrolysis"]}, "links": [{"href": "https://pubs.acs.org/doi/pdf/10.1021/acs.est.3c01816"}, {"href": "https://doi.org/10.1021/acs.est.3c01816"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%20%26amp%3B%20Technology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1021/acs.est.3c01816", "name": "item", "description": "10.1021/acs.est.3c01816", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1021/acs.est.3c01816"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-09-08T00:00:00Z"}}, {"id": "10261/363568", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-28T16:23:50Z", "type": "Journal Article", "created": "2024-07-01", "title": "Impact of future scenarios of climate change on lignin dynamics in soil: A case study in a Mediterranean savannah", "description": "Lignin is an abundant and recalcitrant biopolymer of major relevance as soil organic matter (SOM) component playing a significant role in its stabilization. In this work, a factorial field experiment was established, where three climatic treatments (W, warming; D, drought; W\u00a0+\u00a0D, warming + drought), mimicking future climate change scenarios were installed over five years in a Mediterranean savannah 'dehesa', accounting for its landscape diversity (under the tree canopy and in open grassland). A combination of analytical pyrolysis (Py-GC/MS) and the study of biogeochemical proxies based on lignin monomers is used for the direct detection of lignin-derived phenols and to infer possible shifts in lignin dynamics in soil. A total of 27 main lignin-derived methoxyphenols were identified, exhibiting different patterns and proportions, mainly driven by the effect of habitat, hence biomass inputs to SOM. An accelerated decomposition of lignin moieties -(exhibited by higher LG/LS and Al/K\u00a0+\u00a0Ac ratios)- is particularly exacerbated by the effect of all climatic treatments. There is also an overall effect on increasing lignin oxidation of side chain in syringyl units, especially under the tree canopy due to the alteration in biomass degradation and potential stimulation of enzyme activities. Conversely, in open grassland these effects are slower since the microbial community is expected to be already adapted to harsher conditions. Our findings suggests that climate change-related temperature and soil moisture deviations impact soil lignin decomposition in dehesas threatening this productive Mediterranean agroecosystem and affecting the mechanism of soil carbon storage.", "keywords": ["Soil organic matter", "Dehesas", "Analytical pyrolysis", "Methoxyphenols"]}, "links": [{"href": "https://doi.org/10261/363568"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Science%20of%20The%20Total%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10261/363568", "name": "item", "description": "10261/363568", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10261/363568"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-10-01T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Analytical+pyrolysis&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Analytical+pyrolysis&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Analytical+pyrolysis&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Analytical+pyrolysis&offset=2", "hreflang": "en-US"}], "numberMatched": 2, "numberReturned": 2, "distributedFeatures": [], "timeStamp": "2026-07-28T21:11:19.222806Z"}