Results 41 to 50 of about 5,719 (114)

Are the vegetation structure and composition of the shrubby Caatinga free from edge influence? A estrutura e a composição da vegetação da Caatinga arbustiva são livres da influência de borda?

Acta Botânica Brasílica, 2008
Edge influence, or edge effect, drives many biological changes in fragmented landscapes. This has been extensively studied in many forest ecosystems, but it remains to be described for the Brazilian Caatinga.
André Maurício de Melo Santos, Bráulio Almeida Santos   +1 more
doaj   +1 more source

IECAU-Net: A Wood Defects Image Segmentation Network Based on Improved Attention U-Net and Attention Mechanism

BioResources
Saw wood cracks are defects that affect the appearance and mechanical strength of sawn wood. Crack defects in the surface of sawn wood can be readily detected.
Yingda Dong, Chunguang He, Xiaoyang Xiang, Yuhan Cui, Yongkang Kang, Anning Ding, Huaqiong Duo, Ximing Wang   +7 more
doaj  

A narrow window of summer temperatures associated with shrub growth in Arctic Alaska

Environmental Research Letters, 2020
Warming in recent decades has triggered shrub expansion in Arctic and alpine tundra, which is transforming these temperature-limited ecosystems and altering carbon and nutrient cycles, fire regimes, permafrost stability, land-surface climate-feedbacks ...
Laia Andreu-Hayles, Benjamin V Gaglioti, Logan T Berner, Mathieu Levesque, Kevin J Anchukaitis, Scott J Goetz, Rosanne D’Arrigo   +6 more
doaj   +1 more source

Topographic Roughness as an Emergent Property of Geomorphic Processes and Events

AGU Advances
Earth's terrestrial surfaces commonly exhibit topographic roughness at the scale of meters to tens of meters. In soil‐ and sediment‐mantled settings topographic roughness may be framed as a competition between roughening and smoothing processes.
T. H. Doane, J. H. Gearon, H. K. Martin, B. J. Yanites, D. A. Edmonds   +4 more
doaj   +1 more source

Short-term impacts of nitrogen fertilization on the cover of vascular plant and bryophyte species in boreal Scots pine and Norway spruce stands

Silva Fennica
Nitrogen (N) fertilization increases carbon sequestration and wood production in boreal upland forests and thus supports climate change mitigation. Excess N may, however, alter the cover, biomass and biodiversity of the ground vegetation.
Elisa Männistö, Johanna Jetsonen, Heli Peltola, Teemu Rouvinen, Samuli Launiainen, Annamari Laurén, Marjo Palviainen   +6 more
doaj   +1 more source

PLANT SPECIES DIVERSITY AND ECOSYSTEM FUNCTIONING IN NATIVE SAVANNAS AND GRASSLANDS OF THE PLATEAU IN THE META DEPARTMENT, COLOMBIA

Tropical and Subtropical Agroecosystems
Background: livestock farming has been based on establishing extensive breeding systems (i.e., low density of individuals per unit area). Despite the high diversity of flora in the savanna in the Orinoco plateau of Colombia, there is still a knowledge ...
Jhon Alexander Carrillo-Rozo, Jeisson Rodriguez-Valenzuela, Sergio David Parra-González   +2 more
doaj   +1 more source

Annotated list of vascular plants of Zarafshan National Natural Park (Uzbekistan)

Acta Biologica Sibirica
The article provides an annotated list of vascular plants growing since the beginning of the formation of the Zarafshan State Reserve in 1975 and then in 2018 transferred to another category of protected area – Zarafshan National Natural Park.
Flora Kabulova, Shuhrat Valiev, Noila Jumakulova, Shoxira Atayeva   +3 more
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PATRIMONIAL LIABILITY OF FORESTRY PERSONNEL IN LIGHT OF EMERGENCY ORDINANCE NO. 59/2000 REGARDING THE STATUS OF THE FORESTRY PERSONNEL AND THE JUDICIAL PRACTICE IN THE MATTER [PDF]

Challenges of the Knowledge Society, 2019
The present article aims at carrying out a brief analysis of the patrimonial liability of the forestry personnel, regarding the payment of the value of illegally cut shrubs from the forest fund under their guard, taking into account both the ...
Beatrice-Ștefania NICULAE
doaj  

Belowground biomass and its annual increment in a montane beech forest in Mavrovo National Park, north-west Macedonia

Journal of Forest Science, 2012
The aim of this paper is to present the results of the investigation on belowground biomass and its annual increment in a beech ecosystem (Calamintho grandiflorae-Fagetum) in Mavrovo National Park, Republic of Macedonia. Belowground biomass was estimated
S. Hristovski, Lj. Melovski, M. Šušlevska, Lj. Grupče   +3 more
doaj   +1 more source

Bio-based Lubricants: Progress in Research

BioResources
Biomass is widely distributed, inexpensive, and easily obtainable. As a transportable and storable organic carbon source, biomass has significant advantages in terms of sustainability, environmental friendliness, resource richness, and versatility.
Yinan Hao, Kai Zhang, Jingwen Wang, Renfei Wang, Guo Zhang, Rao Duan, Mengyao Li, Zhiyuan Ren, Shuo Wang, Ximing Wang   +9 more
doaj