نتایج جستجو برای: stand structure
تعداد نتایج: 1598992 فیلتر نتایج به سال:
[This corrects the article DOI: 10.1098/rsos.160136.].
11 0. Introduction 15 0.1 Two slices of life 17 0.2 Interactive products 18 0.3 Interaction design 19 0.4 Research through design 19 0.5 The structure of this thesis 22 1. Dematerialization 27 1.0 In this chapter 29 1.1 Dematerialization 29 1.2 Designing the digital: an overview 35 1.3 Inspirational interaction frameworks 40 1.4 Definition of three stands 47 1.5 First research questions 50 2. T...
More frequent fire activity associated with climate warming is expected to increase the extent of young forest stands in fire-prone landscapes, yet growth rates and biomass allocation patterns in young forests that regenerated naturally following stand-replacing fire have not been well studied. We assessed the structural and functional characteristics of young, postfire lodgepole pine (Pinus co...
Secondary forests cover large areas of the tropics and play an important role in the global carbon cycle. During secondary forest succession, simultaneous changes occur among stand structural attributes, soil properties, and species composition. Most studies classify tree species into categories based on their regeneration requirements. We use a high-resolution secondary forest chronosequence t...
This investigation was conducted to compare the photosynthetic indices in ironwood trees infected by Viscum album L. and healthy trees located both in stand and out of stand in plain forest of Tamishan, Nour city. In each position, five healthy and five infected trees were selected and photosynthetic parameters, stomatal conductance, transpiration and internal CO2 were examined. Results showed ...
Forest ecosystem management, based partly on a greater understanding of natural disturbance regimes, has many variations but is generally considered the most promising approach to accommodating biodiversity concerns in managed forested regions. Using the Lake Duparquet Forest in the southeastern Canadian boreal forest as an example, we demonstrate an approach that attempts to integrate forest a...
This study investigated the variability of the center of pressure (COP) trajectory during voluntary whole-body oscillations. While standing upright on a force platform, eight subjects leaned forward and backward so as to perform reciprocal aiming movements with their COP at a prescribed frequency (F) and amplitude (A) using online visual feedback of their COP location. A total of 25 F-A combina...
We explored the role of stand-level forest structure and spatial extent of forest sampling in models of avian occurrence in northern hardwood-conifer forests for two species: black-throated blue warbler (Dendroica caerulescens) and ovenbird (Seiurus aurocapillus). We estimated site occupancy from point counts at 20 sites and characterized the forest structure at these sites at three spatial ext...
Aboveground wood carbon (AWC) stocks in forest ecosystems are mediated by biotic and abiotic variables. Understanding the internal regulatory mechanisms of forests is important for future management global climate change mitigation. However, how these factors affect AWC subtropical mixed remains poorly understood. Using a database from National Forest Inventory (NFI) China, we observed effects ...
Plant growth regulators (PGRs) are commonly used in commercial farming to control lodging in cereals. PGRs have been shown to alter yield formation and plant stand structure, other than the straw length. To study their potential in Northern growing conditions PGRs and their application time impacts on plant stand structure and yield formation in tall and short statured cultivars of barley, oat,...
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