As the evolutionary significance of hybridization is largely dictated by its extent beyond the first generation, we broadly surveyed patterns of introgression across a sympatric zone of two native poplars (Populus balsamifera, Populus deltoides) in Quebec, Canada within which European exotic Populus nigra and its hybrids have been extensively planted since the 1800s. Single nucleotide polymorph...

1 Graduate Student, Information Technology, Department of Computer Science, Faculty of Science, Khon Kaen University, Thailand 2 Assistant Professor, Computer Science, Department of Computer Science, Faculty of Science, Khon Kaen University, Thailand * corresponding author, e-mail: [email protected] Abstract Community forests are essential to the local population of Thailand. The problem is that...

This paper presents a non-parametric approach for segmenting trees from airborne LiDAR data in deciduous forests. Based on the LiDAR point cloud, the approach collects crown information such as steepness and height on-the-fly to delineate crown boundaries, and most importantly, does not require a priori assumptions of crown shape and size. The approach segments trees iteratively starting from t...

abstract background: studies have shown that, with regard to social, cultural, and institutional contexts, several factors affect family decision-making on organ donation. this study aimed to investigate the effective factors in organ donation by family members with brain-dead patients. materials and methods: this was a descriptive-comparative study in which a researcher-made questionnaire was ...

Pine wilt disease is a that affects ecosystems by rapidly killing trees in short period of time due to the close interaction between three factors such as trees, mediates, and pathogens. There no 100% mortality infectious forest pests. According Korea Forest Service survey, April 2019, damage pine re-nematode was about 490,000 dead 117 cities, counties wards across country. It's fatal condition...

To determine if bats prefer certain ages of aspen mixedwood forest for roosting and foraging, and to predict the impacts of logging on bats, we compared the relative abundances and foraging activities of bats in young, mature, and old stands in  and , using bat detectors. In , we also assessed post-logging bat abundances in two of the mature and two of the old stands. We tracked rad...

Urban greenery is an essential characteristic of the urban ecosystem, which offers various advantages, such as improved air quality, human health facilities, storm-water run-off control, carbon reduction, and increase in property values. Therefore, identification continuous monitoring vegetation (trees) vital importance for our lifestyle. This paper proposes a deep learning-based network, Siame...

Windthrow is a common occurrence in boreal forests, affecting wood supply and presenting regeneration challenges for forest managers. Salvage harvesting often conducted afterwards to extract valuable improve access renewal activities. Research efforts, however, are generally limited the effects of windthrow salvage first few years following disturbance. In 2006, catastrophic wind event occurred...

Management strategies for old growth pine forests have recently begun to include prescribed burns. Fire could influence interactions between bark beetles and mature pine trees, but we cannot predict the effects because we know too little about the numeric and functional responses of bark beetle populations to fire, and because we do not know how fire affects the oleoresin defense system of pine...

Abstract This paper is a continuation of the research on application artificial intelligence in counting trees with use methods for automatic analysis photogrammetric data forests continental region. devoted to AI accelerating decision making processes forest management. It also discusses how RGB imagery from drones could replace aerial and satellite hyperspectral automatically detect unhealthy...