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Dr. Nathalie Soethe

Lebenswissenschaftliche Fakultät · Albrecht Daniel Thaer-Institut für Agrar- und Gartenbauwissenschaften · Urbane Ökophysiologie der Pflanzen

Projekte

Themen

Agrarökologie Analytische Chemie Biodiversitätsschutz Empirische Forschung Ernährungssicherheit Feldversuche Klimawandel Lateinamerika Nachhaltige Entwicklung Nachhaltige Landwirtschaft Nährstoffmanagement Pflanzenphysiologie

Zusammenfassung

Die Forschungsarbeiten von Dr. Nathalie Soethe umfassen zwei Hauptbereiche: die Pflanzenphysiologie und ökologische Landwirtschaft sowie die Sozialpsychologie des Umwelt- und Naturschutzes. Im agrarwissenschaftlichen Teil untersucht sie Nährstoffmanagement, Pflanzenwachstum und ökologische Schädlingsbekämpfung, oft mit Fokus auf tropische Bergwälder in Lateinamerika und nachhaltige Anbaumethoden. Parallel dazu analysiert sie die psychologischen Determinanten und sozialen Bewegungen, die zu engagiertem Handeln für Biodiversität und Klimaschutz führen. Die Methodik verbindet empirische Feldversuche und analytische Chemie mit qualitativen und quantitativen sozialwissenschaftlichen Ansätzen.

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Stammdaten

Identität, Organisation und Kontakt aus HU-FIS.

Dr. Nathalie Soethe

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Fakultät: Lebenswissenschaftliche Fakultät
Institut: Albrecht Daniel Thaer-Institut für Agrar- und Gartenbauwissenschaften
Arbeitsgruppe: Urbane Ökophysiologie der Pflanzen
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Forschungsprojekte

Blattbehandlungsexperiment zur Wirksamkeit des Organismus Agrobasidium pullulans gegen Bakterienbrand bei Süßkirschen
Quelle ↗
Förderer: Wirtschaftsunternehmen / gewerbliche Wirtschaft Zeitraum: 03/2022 - 07/2022 Projektleitung: Dr. Nathalie Soethe

Publikationen

23Auswahl der wichtigsten Publikationen — Quelle: OpenAlex.

Elevation effects on the carbon budget of tropical mountain forests (S Ecuador): the role of the belowground compartment
2010
Global Change Biology · DOI
Carbon storage and sequestration in tropical mountain forests and their dependence on elevation and temperature are not well understood. In an altitudinal transect study in the South Ecuadorian Andes, we tested the hypotheses that (i) aboveground net primary production (ANPP) decreases continuously with elevation due to decreasing temperatures, whereas (ii) belowground productivity (BNPP) remains constant or even increases with elevation due to a shift from light to nutrient limitation of tree growth. In five tropical mountain forests between 1050 and 3060 m a.s.l., we investigated all major above- and belowground biomass and productivity components, and the stocks of soil organic carbon (SOC). Leaf biomass, stemwood mass and total aboveground biomass (AGB) decreased by 50% to 70%, ANPP by about 70% between 1050 and 3060 m, while stem wood production decreased 20-fold. Coarse and large root biomass increased slightly, fine root biomass fourfold, while fine root production (minirhizotron study) roughly doubled between 1050 and 3060 m. The total tree biomass (above- and belowground) decreased from about 320 to 175 Mg dry mass ha−1, total NPP from ca. 13.0 to 8.2 Mg ha−1 yr−1. The belowground/aboveground ratio of biomass and productivity increased with elevation indicating a shift from light to nutrient limitation of tree growth. We propose that, with increasing elevation, an increasing nitrogen limitation combined with decreasing temperatures causes a large reduction in stand leaf area resulting in a substantial reduction of canopy carbon gain toward the alpine tree line. We conclude that the marked decrease in tree height, AGB and ANPP with elevation in these mountain forests is caused by both a belowground shift of C allocation and a reduction in C source strength, while a temperature-induced reduction in C sink strength (lowered meristematic activity) seems to be of secondary importance.
Nutrient availability at different altitudes in a tropical montane forest in Ecuador

Abstract We measured macronutrient concentrations in soils and leaves of trees, shrubs and herbs at 1900, 2400 and 3000 m in an Ecuadorian tropical montane forest. Foliar N, P, S and K concentrations in trees were highest at 1900 m (21.7, 2.2, 1.9 and 10.0 mg g −1 ). At 2400 and 3000 m, foliar concentrations of N, P, S and K were similar to nutrient concentrations in tropical trees with apparent nutrient deficiency, as presented in literature. Unlike foliar nutrient concentrations, the amounts of plant-available nutrients in mineral soil were not affected by altitude or increased significantly with increasing altitude. High C:N ratios (25:1 at 2400 m and 34:1 at 3000 m) and C:P ratios (605:1 at 2400 m and 620:1 at 3000 m) in the soil organic layer suggested slow mineralization of plant litter and thus, a low availability of N and P at high altitudes. Foliar N:P ratios were significantly higher at 2400 m (11.3:1) than at 3000 m (8.3:1), indicating that at high altitudes, N supply was more critical than P supply. In conclusion, the access of plants to several nutrients, most likely N, P, S and K, decreased markedly with increasing altitude in this tropical montane forest.

The missing pillar: Eudemonic values in the justification of nature conservation

2017

Journal of Environmental Planning and Management · DOI

The public justification for nature conservation currently rests on two pillars: hedonic (instrumental) values, and moral values. Yet, these representations appear to do little motivational work in practice; biodiversity continues to decline, and biodiversity policies face a wide implementation gap. In seven EU countries, we studied why people act for nature beyond professional obligations. We explore the motivations of 105 committed actors for nature in detail using life-history interviews, and trace these back to their childhood. Results show that the key concept for understanding committed action for nature is meaningfulness. People act for nature because nature is meaningful to them, connected to a life that makes sense and a difference in the world. These eudemonic values (expressing the meaningful life) constitute a crucial third pillar in the justification of nature conservation. Important policy implications are explored, e.g. with respect to public discourse and the encounter with nature in childhood.