Dokumente Fakultät für Biologie und Psychologie (inkl. GAUSS) nach Gutachter "Scheu, Stefan Prof. Dr."
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Oribatid mite community structure and trophic ecology along a forest land-use gradient: effect of dead wood, time and root-trenching
(2016-10-26)Oribatid mites are involved in decomposition processes, formation of soil structure and nutrient cycling in most soils worldwide. The main habitats of oribatid mites are litter and soil but they also occur numerously on ... -
Ploidy-dependent effect of prolonged photoperiod on mode of reproduction and photosynthesis in the Ranunculus auricomus complex (Ranunculaceae)
(2021-07-23)Polyploidy, whole-genome duplication, enhances stress-tolerance to drastic environmental compared to their diploid progenitor by enabling more extensive adaptation as advantages of gene and genome duplication. Polyploidy ... -
Reproductive strategies of alpine apomictic plants under different ecological conditions
(2019-06-06)The origin of apomixis in natural populations is still not well understood. Apomictic plants tend to expand their distribution range more to higher latitudes and altitudes compared to their sexual progenitors, a phenomenon ... -
Der Rotmilan (Milvus milvus) im Unteren Eichsfeld.
(2013-11-19)In the present study were examined population density, habitat use and composition, young bird rearing, food and predation on Red Kite (Milvus milvus). Essential questions were how stable is the stock in the area and what ... -
Social organisation of the narrow-striped mongoose (Mungotictis decemlineata) in Kirindy Forest C.N.F.E.R.E.F., Madagascar
(2016-02-16)The diversity of ecological and behavioural adaptations of the Carnivora makes them an exemplary group for studying patterns of mammalian social evolution. In particular, species displaying sex-specific forms of social ... -
Soil fauna in lowland rainforest and agricultural systems of Sumatra: Changes in community composition and trophic structure with focus on Collembola
(2022-02-17)Rainforest conversion to agricultural plantations such as rubber and oil palm in Indonesia is increasing in the last decades. In this thesis, I investigated effects of rainforest conversion to rubber and oil palm plantations ... -
Soil protists in tropical systems: From morphological variation to trophic groups
(2022-03-17)In the studies of this thesis, I used two different approaches to shed light on soil protist diversity and ecology in two tropical regions, the montane rainforest of Southern Ecuador and the lowland rainforest of Sumatra, ... -
Spider food webs: influence of cropping cycle and landscape heterogeneity in Philippine rice ecosystems
(2022-04-14)Rice is the most important staple crop of the world, providing approximately 19% of the world population’s caloric uptake and being cultivated on 163 million ha. Rice provides food and income to an estimated 200 million ... -
The conservation biology of the leopard (Panthera pardus)in Gabon
(2009-06-23)The leopard (Panthera pardus) has the greatest geographic distribution of the wild cats, and is the most abundant large felid in Africa. Tropical rainforests comprise a large part of ... -
The effect of the mycorrhizal type on root-rhizosphere interactions in AM and ECM tree species: field studies and mesocosm experiments
(2019-02-20)Based on the two main types of mycorrhizal associations in temperate forests, which are arbuscular (AM) and ectomycorrhiza (ECM), the idea of a mycorrhizal-associated nutrient economy framework developed (Phillips et al., ... -
The Evolution of the Australian Amitermes group
(2022-04-05)Although the Australian Amitermes Group (AAG) is the most diverse and speciose group of higher termites (Termitidae) in Australia, relatively little is known about the origin and evolution of the group. Recent phylogenetic ... -
The role of plant diversity, plant functional groups, and mineral nitrogen for soil microbial functioning and soil mesofauna in temperate grassland
(2021-03-16)Soil-derived ecosystem functions such as decomposition and element cycling are crucial for ecosystem services such as production of food, fodder and biofuels; in short, they are essential prerequisites for human and animal ... -
The role of root-derived carbon in trophic interactions within soil food webs as indicated by analyses of stable isotope, lipids and amino acids in microarthropods (collembola)
(2021-07-12)A considerable amount of photosynthates is released into soil via living roots as rhizodeposits. This root-derived carbon (C) is an important source of energy and nutrients for microorganisms and higher trophic levels in ... -
Topology and stability of complex foodwebs
(2012-03-09)Since the early twentieth century, different general laws have been investigated to understand mechanisms driving stability in natural ecosystems, but until today the mechanisms are still generally unexplored. The main ... -
Transposable elements in sexual and asexual animals
(2015-01-15)The prevalence of sexual reproduction among eukaryotes despite its marked disadvantages is one of the most elusive problems in evolutionary biology. The observation that most asexual eukaryotes are recent offshoots scattered ... -
Trophic structure of soil animal food webs of deciduous forests as analyzed by stable isotope labeling
(2016-10-26)Forest soil invertebrates are extremely diverse and form complex food webs. Trophic interactions are concealed from direct observation by the heterogeneous soil system and small size of soil invertebrates and their basal ... -
Unravelling mechanisms linking plant diversity to plant-disease suppression
(2015-09-01)The use of microbes for biological control of plant diseases represents an environmentally friendly and promising approach. Plant diversity is known to increase numerous ecosystem functions and also increases the resistance ... -
Using body mass, metabolism and stoichiometry to assess ecological impacts in a changing environment
(2016-03-01)Earth’s ecosystems are composed of living organisms and their biotic and abiotic environment. In order to understand the structure and functioning of these ecosystems, ecologists study the interactions of organisms with ... -
Volatile-mediated arthropod-fungus interactions
(2019-01-24)Fungi are considered as main decomposers in terrestrial ecosystems and, due to their diverse lifestyles, engaged in a plethora of interactions with soil invertebrates. Determining the underlying mechanisms that regulate ...