Browsing Naturwissenschaften, Mathematik und Informatik by Referee "Ammer, Christian Prof. Dr."
Now showing items 21-40 of 58
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Influence of competition and other factors on crown and stem characteristics of northern red oak
(2022-03-10)Native to northeastern America and southeastern Canada, northern red oak (Q. rubra L.) was introduced to Europe in 1691 and initially planted in parks and gardens. In the following centuries, three silvicultural ... -
Kronenstruktur und -dynamik von Rein- und Mischbeständen aus Buche, Fichte und Douglasie
(2022-01-13)In this study, crown traits were examined in order to analyze their change depending on the neighborhood of individual trees and based on this, to compare the crown structure and use of space in pure and mixed stands. The ... -
Assembly of root-associated fungi in different soil layers and nitrogen uptake by ectomycorrhizae in temperate forests
(2021-07-30)Fungi are a remarkably highly diverse group of organisms on Earth, playing a pivotal role in ecosystem functioning. Belowground, they act as decomposers, pathogens or symbionts. Members of these functional categories are ... -
Influence of intra- and interspecific competition on timber quality of European beech
(2021-01-21)The timber quality of a single tree is considerably influenced by interactions with other individual trees. These competitive effects from neighbouring trees may be regulated through silvicultural treatments. Consequently, ... -
Ökonomische Analyse forstlicher Bestandesbehandlung
(2020-11-18)The economic analysis of forest stand management serves the understanding of an efficient timber production in a world of scarce resources. Following Möhring (2009), the present study aims to build a bridge between economic ... -
Quantifying the impact of forest management intensity and tree species diversity on individual tree shape and three-dimensional stand structure
(2020-11-04)The three-dimensional distribution of trees and their crowns is an essential characteristic of forest ecosystems that is directly related to several ecosystem functions and services. Silvicultural interventions modify the ... -
Quantifying stand structure and structural complexity along a management gradient in temperate forests
(2020-10-01)The structure and structural complexity of forests influence many important characteristics of forest ecosystems, as well as their functions and services, such as ecosystem stability, maintenance of biodiversity and carbon ... -
Compositional and functional shifts in belowground fungal communities in tropical land-use systems
(2020-06-23)Tropical low-land rainforests are one of the most diverse ecosystems in the world and provide valuable ecosystem services such as climate change mitigation. They are immensely threatened by expanding human land-use. ... -
Implications of forest structure on carbon dioxide fluxes
(2020-05-07)Forests provide numerous crucial ecosystem services to society that are sensitive to climate and to extreme climate events such as droughts. One of the services of interest is the ability to sequester the greenhouse gas ... -
Interconnection of a Forest Growth Model and a Structural Model for Young Poplar Trees (Populus spp.)
(2020-03-20)When planting fast-growing tree species such as poplars and willows on agricultural land in short rotation coppice plantations, site selection and the associated yield potential pose a central decision for the practitioner. ... -
Genetic analyses to determine the genetic variation and region of origin of introduced northern red oak (Quercus rubra L.) populations
(2020-03-20)Northern red oak (Quercus rubra L.) has its natural distribution area in the eastern and north-eastern USA and south-eastern Canada and was first introduced at the end of the 17th century in France. Later, Q. rubra was ... -
Zuwachspotenziale und Klimasensitivität eingeführter Baumarten in Nordrhein-Westfalen
(2020-02-14)The ongoing global change with increasing mean annual temperatures, altered conditions in precipitation and a higher expected frequency and magnitude of extreme weather events leads to unpredictable environmental conditions ... -
The effect of neighborhood identity on seasonal tree growth responses and ecophysiological characteristics of European beech (Fagus sylvatica L.)
(2020-01-17)Climate change related rise in mean surface (air) temperature, altered intra-annual thermal and precipitation regimes as well as an expected increase of extreme weather events which are also prognosticated for large parts ... -
Der Einfluss von Stickstoff und Trockenheit auf die Vitalität einer Hainbuchen- und Kiefernverjüngung
(2019-05-29)Due to its physical properties Biochar has the potential of stabilizing a forest rejuvenation during periods of drought. To verify this, a field trial was set up in 2014 in the Hessian Ried. The observed mortality of the ... -
Drone-based assessments of crowns, canopy cover and land use types in and around an oil palm agroforestry experiment
(2019-04-11)Oil palm cultivation has vastly expanded in the last decades and led to high economic returns, but has also induced environmental problems including reduced biological diversity and impaired ecosystem services. One potential ... -
Process optimization of thermal modification of Chilean Eucalyptus nitens plantation wood
(2019-02-22)Eucalyptus nitens is one of the most important fast growing plantation species in Chile. Currently it is mostly used for pulp and paper, but in recent years there has been a growing market for solid wood products to increase ... -
Zu den gesundheitsfördernden Effekten von Waldaufenthalten
(2018-04-11)According to a forecast people of the high-income countries will suffer most on the two civilization diseases heart diseases and depression in year 2030. Currently, these diseases already lead to considerable financial ... -
Laubholz mit niedriger Umtriebszeit in Nordwestdeutschland - Charakterisierung der Vorkommen, Wachstumsmodellierung und waldbauliche Steuerung
(2018-03-02)The supply of short-lived deciduous trees (ALn) in Lower Saxony was analysed using data from the German national forest inventory (NFI, 2002 and 2012). The standard results of the NFI were augmented by own calculations, ... -
Wood anatomy and cytokinin-related responses in poplar (Populus sp.) under environmental stress
(2018-02-09)Woody plants like poplar are of great importance as a second generation bioenergy crop. However, wood formation is dynamic and strongly affected by exogenous factors such as drought or seasonality, and endogenous factors. ... -
Quantifying three-dimensional stand structure and its relationship with forest management and microclimate in temperate forest ecosystems
(2018-02-01)Summary Forest management modifies the spatial structure of forest ecosystems, which is considered to be relevant for habitat availability and biodiversity as well as several ecosystem processes and functions. Contrary ...