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تعداد نتایج: 275 فیلتر نتایج به سال:
The need to support life in degraded landscapes is a pressing challenge of our time. Models from ecology, computing, architecture, and engineering can the design construction habitat features contexts where human intervention necessary urgent. For example, anthropogenic change causing many arboreal habitats disappear due diminishing populations large old trees. Current management approaches pro...
Abstract Background Longleaf pine ( Pinus palustris Mill.) ecosystems were historically widespread in the North American Coastal Plain and some southeastern piedmont montane settings. The naval stores industry, deforestation, other human activities resulted an extensive loss (c. 97% loss) of original woodlands savannas. are maintained by frequent surface fire which promotes successful regenerat...
There is a trade-off between leaving coarse woody debris (CWD) in the stand, providing desirable ecosystem services, and harvesting it. To consider this trade-off, forest management needs to model describing decomposition of CWD. When trunk lying on ground, it can be attacked by microorganisms faster than when still standing. Current models fail account for these local differences processes, wh...
Deadwood is one of the main structural features forest ecosystems and plays an important role in nutrient cycle, maintaining production environmental heterogeneity, acts as indicator for assessing biodiversity ecosystems. This research was conducted with aim evaluating quantitative qualitative characteristics deadwood according to influence accessibility indicators a comparison between natural ...
Gradients in local environmental characteristics may favour the abundance of species with particular traits, while other decline, or different traits at same time, without an increase average abundances. Therefore, we asked: do variations and differ along gradients deadwood variables? Do trait occurrence change richness within between functional groups? Thus, analysed beetle assemblages five fo...
Deadwood provides a habitat for large number of species and acts as significant carbon storage. Thus, deadwood mapping allows planning various actions related to biodiversity conservation forest management. Airborne laser scanning (ALS) an efficient means monitoring forested areas is thus potential method mapping. Machine learning (ML) can be used automating detection from ALS data. However, ML...
We analyse two very simple Petri nets inspired by the Oregonator model of the Belousov-Zhabotinsky reaction using our stochastic Petri net simulator. We then perform the Krohn-Rhodes holonomy decomposition of the automata derived from the Petri nets. The simplest case shows that the automaton can be expressed as a cascade of permutation-reset cyclic groups, with only 2 out of the 12 levels havi...
Deforestation and habitat fragmentation that arise largely due to the conversion of forests to other agricultural land-use types and over-utilization of forest resources to satisfy the food and energy requirements of the increasing population are major environmental concerns in northern Ethiopia. Understanding plant species diversity and spatial distribution along environmental gradients is cru...
Deforestation and habitat fragmentation that arise largely due to the conversion of forests to other agricultural land-use types and over-utilization of forest resources to satisfy the food and energy requirements of the increasing population are major environmental concerns in northern Ethiopia. Understanding plant species diversity and spatial distribution along environmental gradients is cru...
The early colonization of newly created coarse woody material (CWM) by beetles was studied in aspen mixedwood forests at two locations in north-central Alberta. Healthy trembling aspen (Populus tremuloides Michx.) trees, in old (>100 years) and mature (40–80 years) stands, were cut to provide three types of CWM: stumps, bolts on the ground (logs), and bolts suspended above the ground to simulat...
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