Results 11 to 20 of about 5,700 (247)

Automatic detection of standing dead trees based on improved YOLOv7 from airborne remote sensing imagery [PDF]

Frontiers in Plant Science
Detecting and localizing standing dead trees (SDTs) is crucial for effective forest management and conservation. Due to challenges posed by mountainous terrain and road conditions, conducting a swift and comprehensive survey of SDTs through traditional ...
Hongwei Zhou, Shangxin Wu, Zihan Xu, Hong Sun   +3 more
doaj   +2 more sources

Dead standing pine trees in a boreal forest landscape in the Kalevala National Park, northern Fennoscandia: amount, population characteristics and spatial pattern

Forest Ecosystems, 2017
Background After their death, Scots pine trees can remain standing for decades and sometimes up to 200 years, forming long-lasting and ecologically important structures in boreal forest landscapes.
Timo Kuuluvainen, Tuomas Aakala, Gergely Várkonyi   +2 more
doaj   +3 more sources

Standing-dead tree component of the boreal forest in central Saskatchewan

Forest Ecology and Management, 2000
Abstract The standing-dead tree component was assessed in part of the upland forests in the mixedwood boreal forest in central Saskatchewan. Comparisons of the average number of dead trees per hectare were made between softwood stands, softwood-dominant mixedwood stands, hardwood-dominant mixedwood stands and hardwood stands.
Grief, G.E., Archibold, O.W.
exaly   +3 more sources

Identifying Sources and Oxidation of Methane in Standing Dead Trees in Freshwater Forested Wetlands [PDF]

Frontiers in Environmental Science, 2022
Wetlands are large sources of methane (CH4), therefore it is vital to understand the pathways, mechanisms, and sources to anticipate future positive feedbacks to climate change. Plant mediated transport of CH4 from sediment-borne gases is thought to be a
Melinda Martinez, Marcelo Ardón, Mary Jane Carmichael   +2 more
doaj   +2 more sources

Detection of Standing Dead Trees after Pine Wilt Disease Outbreak with Airborne Remote Sensing Imagery by Multi-Scale Spatial Attention Deep Learning and Gaussian Kernel Approach

Remote Sensing, 2022
The continuous and extensive pinewood nematode disease has seriously threatened the sustainable development of forestry in China. At present, many studies have used high-resolution remote sensing images combined with a deep semantic segmentation ...
Zemin Han, Wenjie Hu, Shoulian Peng, Haoran Lin, Jian Zhang, Jingjing Zhou, Pengcheng Wang, Yuanyong Dian   +7 more
doaj   +3 more sources

Silvi-Net – A dual-CNN approach for combined classification of tree species and standing dead trees from remote sensing data

International Journal of Applied Earth Observation and Geoinformation, 2021
Forest managers and nature conservationists rely on precise mapping of single trees from remote sensing data for efficient estimation of forest attributes. In recent years, additional quantification of dead wood in particular has garnered interest. However, tree-level approaches utilizing segmented single trees are still limited in accuracy and their ...
Sebastian Briechle, George Vosselman
exaly   +5 more sources

When a tree falls: Controls on wood decay predict standing dead tree fall and new risks in changing forests.

PLoS ONE, 2018
When standing dead trees (snags) fall, they have major impacts on forest ecosystems. Snag fall can redistribute wildlife habitat and impact public safety, while governing important carbon (C) cycle consequences of tree mortality because ground contact ...
Brad Oberle, Kiona Ogle, Amy E Zanne, Christopher W Woodall   +3 more
doaj   +4 more sources

Non-negligible role of dead organic matter in a rainforest remnant in Northeast Brazil [PDF]

Rodriguésia, 2022
Dead organic matter represents an essential reservoir of carbon, especially that allocated in standing dead trees, coarse woody debris, and fine litter, playing a pivotal role in nutrient cycling and habitat provisioning. However, necromass is frequently
Pedro Henrique Albuquerque Sena, Nathan Castro Fonsêca, Ana Carolina Borges Lins-e-Silva   +2 more
doaj   +1 more source

Drivers of greenhouse gas emissions from standing dead trees in ghost forests [PDF]

Biogeochemistry, 2021
Abstract Coastal freshwater forested wetlands are rapidly transitioning from forest to marsh, leaving behind many standing dead trees (snags) in areas often called ‘ghost forests’. Snags can act as conduits for soil produced greenhouse gases (GHG) and can also be sources as they decompose.
Melinda Martinez, Marcelo Ardón
openaire   +2 more sources

Modeling of Dead Wood Potential Based on Tree Stand Data [PDF]

Forests, 2020
Here we present a framework for identifying areas with high dead wood potential (DWP) for conservation planning needs. The amount and quality of dead wood and dying trees are some of the most important factors for biodiversity in forests. As they are easy to recognize on site, it is widely used as a surrogate marker for ecological quality of forests ...
Leikola, Niko, Halme, Panu, Heinaro, Einari, Lahtinen, Ari, Tanhuanpää, Topi, Mikkonen, Ninni   +6 more
openaire   +3 more sources