Browsing Naturwissenschaften, Mathematik und Informatik by Referee "Ammer, Christian Prof. Dr."
Now showing items 41-58 of 58
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Reaktion von Waldbeständen am Rande der südlichen Taiga auf Klimafaktoren, natürliche und waldbauliche Störungen
(2017-11-30)The northern Mongolian mountain forest steppe, the transition zone between taiga and open steppe, is rich in plant and animal life. It is the most productive region in the country in terms of agriculture and, as a result, ... -
Picea abies and climate change – does increasing thinning intensity prevent drought stress?
(2017-10-11)The predicted increase in frequency of intense and prolonged drought events challenges forest management. Centuries of forest management has led to Norway spruce (Picea abies [L.] Karst.) monocultures outside its natural ... -
Threatened tree species across conservation zones in a nature reserve of North-Western Vietnam
(2017-03-21)The high diversity of tree species in tropical forests is driven by a large proportion of rare species. Rare species are vulnerable and threatened to extirpation and extinction when their habitats are destroyed. This study ... -
Species-specific Effects on the Carbon and Nitrogen Cycle in Temperate Decidous Forest
(2017-02-20)Various studies suggest that the main mechanism of biodiversity effects on ecosystem function is niche complementarity, but it is challenging to assess complementarity among plant species understanding its key mechanisms. ... -
Kohlenstoffspeicherung als Teilziel der strategischen Waldbauplanung
(2016-08-09)Carbon sequestration in forests is a highly topical issue in the current climate change debate. The most important carbon pools are living and dead tree biomass, timber products and their substitution effects. The carbon ... -
Natürliche Waldentwicklung unter dem Einfluss des Borkenkäfers im Nationalpark Berchtesgaden
(2016-06-24)Disturbances are an integral part of forest ecosystems. Integrating single-tree dynamics to large-scale disturbances as windthrows, fire or insect calamities, disturbances influence natural species composition and regeneration ... -
Functional diversity of mycorrhiza in relation to land-use changes and ecosystem functions
(2016-02-19)Managing forest ecosystems has a long tradition in Germany. However, the influence of this intervention on the most important symbiosis partners of the trees, mycorrhizal fungi, is poorly understood. The fungal partner ... -
Nutrient response efficiency, tree-microbe competition for nutrients and tree neighborhood dynamics in a mixed-species temperate deciduous forest in central Germany
(2015-10-23)In most Central European countries, less than one percent of the remaining broadleaved forest is undisturbed and temperate forests face challenges such as species invasion, climate change and increased nitrogen deposition. ... -
Analyse von Schälschadensinventuren in Harz und Solling
(2015-06-18)The present work represents the continuation of a project that examined the causal relationships between environmental factors and the occurrence of bark stripping on spruce by red deer in the Harz and Solling mountains ... -
Quantifizierung der Feinwurzeln von Bäumen durch elektrische Verfahren
(2015-04-23)The quantification especially of fine roots of trees creates some difficulty because, contrary to the aboveground parts of the tree, roots are not readily visible. In recent years electrical methods have been developed for ... -
Modelle zur Abbildung asymmetrischer Kronenformen und zur Beschreibung der Zuwachsleistung für sechs Baumarten in Nordwestdeutschland
(2014-07-11)The canopy plays an important role in forest ecosystems: its structure, especially size and shape of the crowns and their position in relation to each other, determines the micro-climatic conditions at the forest floor, ... -
Competition mechanisms of native and exotic tree species
(2014-01-09)The amount of exotic plant species introduced to new regions by humans has considerably increased in the last two centuries. Worldwide, the invasion of exotic species represents an important threat to native biodiversity ... -
Tree water uptake partitioning and water use rates in a temperate mixed forest
(2014-01-09)Little information is available on the relationship between tree species diversity and forest stand water use although water availability is considered a major control of productivity in forests of central Europe and other ... -
New adaptive plot designs for sampling rare and clustered populations
(2012-02-07)In this methodological study, three new and more practical adaptive plot designs (I, II and III) are introduced with an overall objective to improve the efficiency of sampling rare and ... -
Diversity and abundance of medicinal plants among different forest-use types of the Pakistani Himalaya
(2012-02-06)Medicinal plants collected in the Himalayan forests are receiving increasing attention at the international level for a number of reasons and they play an important role in securing rural ... -
Surveillance of tick-parasitized voles, mice and roe deer in Germany: Arboviral infection rates in relation to population densities and host characteristics
(2010-11-17)This dissertation is focussed on the ecology of tick-borne encephalitis (TBE), an infectious disease of major medical significance. The thesis is organised as a series of 9 self-contained ... -
Tree transpiration inforest plantations: Effects of species, seasonality and diversity (Panama)
(2010-06-25)Forests serve many benefits worldwide such as providing renewable raw materials and energy, maintaining biodiversity and protecting land and water resources. However, they are threatened ... -
Kohlenstoffvorrat, Nährstoffvorräte und Wasserdynamik nach forstlichen Eingriffen in Fichtenreinbestände
(2010-06-22)Numerous spruce stands in Germany need to be harvested now or in the foreseeable future, due to either their age, the silvicultural objective of turning from even-aged pure stands to ...