TY - JOUR A1 - Monhonval, Arthur A1 - Strauss, Jens A1 - Thomas, Maxime A1 - Hirst, Catherine A1 - Titeux, Hugues A1 - Louis, Justin A1 - Gilliot, Alexia A1 - D'Aische, Eleonore du Bois A1 - Pereira, Benoit A1 - Vandeuren, Aubry A1 - Grosse, Guido A1 - Schirrmeister, Lutz A1 - Jongejans, Loeka Laura A1 - Ulrich, Mathias A1 - Opfergelt, Sophie T1 - Thermokarst processes increase the supply of stabilizing surfaces and elements (Fe, Mn, Al, and Ca) for mineral-organic carbon interactions JF - Permafrost and periglacial processes N2 - The stabilizing properties of mineral-organic carbon (OC) interactions have been studied in many soil environments (temperate soils, podzol lateritic soils, and paddy soils). Recently, interest in their role in permafrost regions is increasing as permafrost was identified as a hotspot of change. In thawing ice-rich permafrost regions, such as the Yedoma domain, 327-466 Gt of frozen OC is buried in deep sediments. Interactions between minerals and OC are important because OC is located very near the mineral matrix. Mineral surfaces and elements could mitigate recent and future greenhouse gas emissions through physical and/or physicochemical protection of OC. The dynamic changes in redox and pH conditions associated with thermokarst lake formation and drainage trigger metal-oxide dissolution and precipitation, likely influencing OC stabilization and microbial mineralization. However, the influence of thermokarst processes on mineral-OC interactions remains poorly constrained. In this study, we aim to characterize Fe, Mn, Al, and Ca minerals and their potential protective role for OC. Total and selective extractions were used to assess the crystalline and amorphous oxides or complexed metal pools as well as the organic acids found within these pools. We analyzed four sediment cores from an ice-rich permafrost area in Central Yakutia, which were drilled (i) in undisturbed Yedoma uplands, (ii) beneath a recent lake formed within Yedoma deposits, (iii) in a drained thermokarst lake basin, and (iv) beneath a mature thermokarst lake from the early Holocene period. We find a decrease in the amount of reactive Fe, Mn, Al, and Ca in the deposits on lake formation (promoting reduction reactions), and this was largely balanced by an increase in the amount of reactive metals in the deposits on lake drainage (promoting oxidation reactions). We demonstrate an increase in the metal to C molar ratio on thermokarst process, which may indicate an increase in metal-C bindings and could provide a higher protective role against microbial mineralization of organic matter. Finally, we find that an increase in mineral-OC interactions corresponded to a decrease in CO2 and CH4 gas emissions on thermokarst process. Mineral-OC interactions could mitigate greenhouse gas production from permafrost thaw as soon as lake drainage occurs. KW - Arctic KW - organic carbon stabilization KW - permafrost KW - redox processes KW - thaw KW - Yedoma Y1 - 2022 U6 - https://doi.org/10.1002/ppp.2162 SN - 1045-6740 SN - 1099-1530 VL - 33 IS - 4 SP - 452 EP - 469 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Monhonval, Arthur A1 - Strauss, Jens A1 - Mauclet, Elisabeth A1 - Hirst, Catherine A1 - Bemelmans, Nathan A1 - Grosse, Guido A1 - Schirrmeister, Lutz A1 - Fuchs, Matthias A1 - Opfergelt, Sophie T1 - Iron redistribution upon thermokarst processes in the Yedoma domain JF - Frontiers in Earth Science N2 - Ice-rich permafrost has been subject to abrupt thaw and thermokarst formation in the past and is vulnerable to current global warming. The ice-rich permafrost domain includes Yedoma sediments that have never thawed since deposition during the late Pleistocene and Alas sediments that were formed by previous thermokarst processes during the Lateglacial and Holocene warming. Permafrost thaw unlocks organic carbon (OC) and minerals from these deposits and exposes OC to mineralization. A portion of the OC can be associated with iron (Fe), a redox-sensitive element acting as a trap for OC. Post-depositional thaw processes may have induced changes in redox conditions in these deposits and thereby affected Fe distribution and interactions between OC and Fe, with knock-on effects on the role that Fe plays in mediating present day OC mineralization. To test this hypothesis, we measured Fe concentrations and proportion of Fe oxides and Fe complexed with OC in unthawed Yedoma and previously thawed Alas deposits. Total Fe concentrations were determined on 1,292 sediment samples from the Yedoma domain using portable X-ray fluorescence; these concentrations were corrected for trueness using a calibration based on a subset of 144 samples measured by inductively coupled plasma optical emission spectrometry after alkaline fusion (R (2) = 0.95). The total Fe concentration is stable with depth in Yedoma deposits, but we observe a depletion or accumulation of total Fe in Alas deposits, which experienced previous thaw and/or flooding events. Selective Fe extractions targeting reactive forms of Fe on unthawed and previously thawed deposits highlight that about 25% of the total Fe is present as reactive species, either as crystalline or amorphous oxides, or complexed with OC, with no significant difference in proportions of reactive Fe between Yedoma and Alas deposits. These results suggest that redox driven processes during past thermokarst formation impact the present-day distribution of total Fe, and thereby the total amount of reactive Fe in Alas versus Yedoma deposits. This study highlights that ongoing thermokarst lake formation and drainage dynamics in the Arctic influences reactive Fe distribution and thereby interactions between Fe and OC, OC mineralization rates, and greenhouse gas emissions. KW - permafrost KW - thaw KW - redox processes KW - carbon stabilization KW - arctic KW - subarctic Y1 - 2021 U6 - https://doi.org/10.3389/feart.2021.703339 SN - 2296-6463 VL - 9 PB - Frontiers Media CY - Lausanne ER - TY - JOUR A1 - Strauß, Sophie A1 - Bondü, Rebecca A1 - Roth, Felix T1 - Justice sensitivity in middle childhood BT - measurement and location in the temperamental and social skills space JF - Journal of personality assessment N2 - Research suggested that justice sensitivity (JS)-the tendency to perceive and negatively respond to injustice-may already manifest in middle childhood, but empirical evidence is sparse. We, therefore, examined the measurement of JS in this age range and its associations with prosocial behavior, aggressive behavior, temperamental traits, and social skills. We had 361 children between 6 and 10 years of age and/or their parents rate the children's JS and its potential correlates. We replicated the JS-factor structure with three correlated subscales in both child and parent-ratings that showed strict measurement invariance. In line with previous findings in older age groups, victim JS positively predicted aggressive and negatively predicted prosocial behavior, whereas observer and perpetrator JS positively predicted prosocial and perpetrator JS negatively predicted aggressive behavior. The JS perspectives showed expected links with temperamental traits. All three subscales were positively related to empathy and theory of mind, but victim JS was negatively related to affective self-regulation. Findings suggest that interpersonal differences in JS may reliably and validly be measured in middle childhood and that JS is associated with aggressive and prosocial behavior already in childhood. Thus, future research should consider the role of JS for moral and personality development and developmental psychopathology. Y1 - 2020 U6 - https://doi.org/10.1080/00223891.2020.1753754 SN - 0022-3891 SN - 1532-7752 VL - 103 IS - 4 SP - 476 EP - 488 PB - Routledge, Taylor & Francis Group CY - Philadelphia, Pa. [u.a] ER - TY - THES A1 - Strauß, Sophie T1 - Justice sensitivity in middle childhood T1 - Ungerechtigkeitssensibilität in der mittleren Kindheit T2 - exploring the measurement and manifestation of a trait in a sensitive developmental phase and its relations to variables from the social and moral development space T2 - Erforschung der Messung und Manifestation eines Traits in einer sensiblen Entwicklungsphase und seiner Beziehungen zu Variablen der sozialen und moralischen Entwicklung N2 - Justice structures societies and social relations of any kind; its psychological integration provides a fundamental cornerstone for social, moral, and personality development. The trait justice sensitivity captures individual differences in responses toward perceived injustice (JS; Schmitt et al., 2005, 2010). JS has shown substantial relations to social and moral behavior in adult and adolescent samples; however, it was not yet investigated in middle childhood despite this being a sensitive phase for personality development. JS differentiates in underlying perspectives that are either more self- or other-oriented regarding injustice, with diverging outcome relations. The present research project investigated JS and its perspectives in children aged 6 to 12 years with a special focus on variables of social and moral development as potential correlates and outcomes in four cross-sectional studies. Study 1 started with a closer investigation of JS trait manifestation, measurement, and relations to important variables from the nomological network, such as temperamental dimensions, social-cognitive skills, and global pro- and antisocial behavior in a pilot sample of children from south Germany. Study 2 investigated relations between JS and distributive behavior following distributive principles in a large-scale data set of children from Berlin and Brandenburg. Study 3 explored the relations of JS with moral reasoning, moral emotions, and moral identity as important precursors of moral development in the same large-scale data set. Study 4 investigated punishment motivation to even out, prevent, or compensate norm transgressions in a subsample, whereby JS was considered as a potential predictor of different punishment motives. All studies indicated that a large-scale, economic measurement of JS is possible at least from middle childhood onward. JS showed relations to temperamental dimensions, social skills, global social behavior; distributive decisions and preferences for distributive principles; moral reasoning, emotions, and identity; as well as with punishment motivation; indicating that trait JS is highly relevant for social and moral development. The underlying self- or other-oriented perspectives showed diverging correlate and outcome relations mostly in line with theory and previous findings from adolescent and adult samples, but also provided new theoretical ideas on the construct and its differentiation. Findings point to an early internal justice motive underlying trait JS, but additional motivations underlying the JS perspectives. Caregivers, educators, and clinical psychologists should pay attention to children’s JS and toward promoting an adaptive justice-related personality development to foster children’s prosocial and moral development as well as their mental health. N2 - Gerechtigkeit strukturiert Gesellschaften und soziale Beziehungen jeglicher Art; ihre psychologische Integration stellt einen grundlegenden Eckpfeiler für die soziale, moralische und Persönlichkeitsentwicklung dar. Ungerechtigkeitssensibilität (justice sensitivity; JS) erfasst als Trait individuelle Unterschiede in der Reaktion auf wahrgenommene Ungerechtigkeit (Schmitt et al., 2005, 2010). JS hat bei Erwachsenen und Jugendlichen substanzielle Zusammenhänge mit sozialem und moralischem Verhalten gezeigt; in der mittleren Kindheit wurde sie jedoch noch nicht untersucht, obwohl die mittlere Kindheit eine sensible Phase für die Persönlichkeitsentwicklung ist. JS differenziert sich in zugrunde liegende Perspektiven, die in Bezug auf Ungerechtigkeit entweder stärker selbst- oder fremdorientiert sind, mit divergierenden Outcome Beziehungen. Das vorliegende Forschungsprojekt untersuchte JS und seine Perspektiven bei Kindern im Alter von 6 bis 12 Jahren mit besonderem Augenmerk auf Variablen der sozialen und moralischen Entwicklung als mögliche Korrelate und Outcomes in vier Querschnittsstudien. Studie 1 begann mit einer näheren Untersuchung der Manifestation und Messung von JS sowie der Beziehungen zu wichtigen Variablen des nomologischen Netzwerks, wie z. B. Temperamentsdimensionen, sozial-kognitiven Fähigkeiten und globalem pro- und antisozialen Verhalten in einer Pilotstichprobe mit Kindern aus Süddeutschland. Studie 2 untersuchte Beziehungen zwischen JS und distributivem Verhalten nach distributiven Prinzipien in einem groß angelegten Datensatz mit Kindern aus Berlin und Brandenburg. Studie 3 untersuchte die Beziehungen zwischen JS und moralischem Schlussfolgern, moralischen Emotionen und moralischer Identität als wichtigen Vorläufern der moralischen Entwicklung in demselben Datensatz. Studie 4 untersuchte Bestrafungsmotivation zum Ausgleich, zur Verhinderung oder zur Kompensation von Normübertretungen in einer Teilstichprobe, wobei JS als potenzieller Prädiktor für verschiedene Bestrafungsmotive betrachtet wurde. Alle Studien zeigten, dass eine groß angelegte, ökonomische Messung von JS mindestens ab der mittleren Kindheit möglich ist. JS zeigte Beziehungen zu Temperamentsdimensionen, sozialen Fähigkeiten, globalem Sozialverhalten; distributiven Entscheidungen und Präferenzen für distributive Prinzipien; moralischem Schlussfolgern, Emotionen und Identität sowie mit Bestrafungsmotivation. Dies deutet darauf hin, dass Trait JS für die soziale und moralische Entwicklung von großer Bedeutung ist. Die zugrunde liegenden selbst- oder fremdorientierten Perspektiven zeigten divergierende Korrelat- und Outcome Beziehungen, die größtenteils mit der Theorie und früheren Befunden aus Jugendlichen- und Erwachsenenstichproben übereinstimmten, aber auch neue theoretische Ideen über das Konstrukt und seine Differenzierung lieferten. Die Ergebnisse deuten auf ein frühes internalisiertes Gerechtigkeitsmotiv hin, das Trait JS zugrunde liegt, aber auch auf zusätzliche Motivationen, die den JS-Perspektiven zugrunde liegen. Eltern, Betreuungspersonen, Pädagog:innen und klinische Psycholog:innen sollten die JS von Kindern beachten und eine adaptive gerechtigkeitsbezogene Persönlichkeitsentwicklung unterstützen, um die prosoziale und moralische Entwicklung der Kinder sowie ihre psychische Gesundheit zu fördern. KW - justice sensitivity KW - moral development KW - middle childhood KW - distributive justice KW - personality development KW - justice development KW - Ungerechtigkeitssensibilität KW - Verteilungsgerechtigkeit KW - Gerechtigkeitsentwicklung KW - mittlere Kindheit KW - moralische Entwicklung KW - Persönlichkeitsentwicklung Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-591944 ER -