Die chronologische Liste zeigt aktuelle Veröffentlichungen aus dem Forschungsbetrieb der Hochschule Weihenstephan-Triesdorf. Zuständig ist das Zentrum für Forschung und Wissenstransfer (ZFW).
8 Ergebnisse
M.Sc. David Gackstetter,
Malte von Bloh,
Dr. Veronika Hannus,
PD Dr. Sebastian Meyer,
Prof. Dr. Wolfgang W. Weisser,
Claudia Luksch,
Prof. Dr. Senthold Asseng
Understanding the interaction of terrestrial freshwater and seawater in the subterranean estuary (STE) is an important factor when considering nutrient fluxes from land to sea. State-of-the-art research describes the STE by a tide-induced upper saline recirculation cell, a freshwater discharge tube and a deep saltwater wedge. However, recent numerical modelling and shallow hydrogeochemical investigations for high-energy beaches indicate that multiple saline recirculation cells may exist and affect the land-sea interaction. Electrical Resistivity Tomography (ERT) and Direct Push (DP) technologies are common tools to explore the subsurface. Due to their sensitivity to the electrical conductivity of pore water, they permit investigating the STE. This study combines ERT and DP to image the salinity distribution within the STE of a meso-tidal, high-energy beach. We actively incorporate the DP data into the ERT inversion and use geostatistical regularization for closing the resolution gap. For the first time, our experimental results confirm the existence of several 10–20 m deep reaching upper saline recirculation cells and corresponding brackish discharge locations generated by a pronounced runnel-ridge beach system in 2019, whereas in 2021 only a single cell was displayed for a flat topography at the time.
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Dr. Daniel Kuptz,
Carina Kuchler,
Elisabeth Rist,
Robert Mack,
Claudia Schön,
Dr. Tim Eickenscheidt,
Prof. Dr. Matthias Drösler,
Dr. Hans Hartmann
Trockengelegte Moore zu renaturieren ist ein Gewinn für den Klimaschutz. Viele dieser ehemaligen Moorflächen sind landwirtschaftliche Nutzflächen und sollen auch nach der Wiedervernässung weiter genutzt werden. Im Verbundprojekt „MOORuse“ wurden der Anbau und die Nutzung von Paludikulturen (Rohrkolben, Schilf, Rohrglanzgras und Seggen) untersucht, darunter auch die Verbrennung in kleinen Biomassekesseln zur Wärmeerzeugung. Die Praxisversuche des TFZ mit Pellets aus Paludikulturen zeigen, dass eine solche Nutzung anspruchsvoll ist.
This dataset contains a classification of 432 arthropod families into five functional groups (herbivores, predators, parasitoids, parasites, detritivores) and three moving types (flying, crawling, jumping). The families were classified based on available literature, considering the trophic level and moving behavior of the majority of associated species in their adult stages. Families with unknown information or containing omnivores that could not be assigned to a single trophic group were excluded from classification. The selection of families is based on Malaise trap data collected in 2019 within three research projects conducted in Bavaria, Southern Germany. Arthropod families were identified via Metabarcoding, using CO1-5P (mitochondrial cytochrome oxidase 1).
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Shubhangi Srivastava,
Ann Mary Kollemparembil,
Viktoria Zettel,
Timo Claßen,
Mohammad Mobarak,
Prof. Dr. Bernhard Gatternig,
Antonio Delgado,
Mario Jekle,
Bernd Hitzmann
Plant functional traits (FTs) are important for understanding plant ecological strategies (e.g., drought avoidance), especially in the nutrient-poor soils of serpentine ecosystems. In the Mediterranean areas, such ecosystems are characterized by climatic factors (e.g., summer drought) that exert a filtering effect. In our study, we analyzed 24 species with varying serpentine affinity, from strictly serpentine plants to generalist plants, from two ultramafic shrublands in southern Spain, considering four FTs: plant height (H), leaf area (LA), specific leaf area (SLA), and stem specific density (SSD). Additionally, we also identified the species’ dominant strategies to avoid drought and those strategies’ relationship to serpentine affinity. We used principal component analysis to identify combinations of FTs, and cluster analysis to define Functional Groups (FGs).We defined eight FGs, which suggests that such Mediterranean serpentine shrublands are composed of species with wide-ranging of FTs. Indicator traits explained 67–72% of the variability based on four strategies: (1) lower H than in other Mediterranean ecosystems; (2) middling SSD; (3) low LA; and (4) low SLA due to thick and/or dense leaves, which contribute to long leaf survival, nutrient retention, and protection from desiccation and herbivory. Generalist plants had higher SLA than obligate serpentine plants, whereas the obligate serpentine plants showed more drought avoidance mechanisms than the generalists. Although most plant species inhabiting Mediterranean serpentine ecosystems have shown similar ecological adaptations in response to the Mediterranean environment, our results suggest that serpentine obligate plant species could present greater resilience to climate change. Given greater number and more pronounced drought avoidance mechanisms in these species compared with generalists, and the high number of FGs identified, the serpentine plants have shown adaptation to severe drought.
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