Results 11 to 20 of about 234,107 (311)

Predicting Tree Species From 3D Laser Scanning Point Clouds Using Deep Learning

open access: yesFrontiers in Plant Science, 2021
Automated species classification from 3D point clouds is still a challenge. It is, however, an important task for laser scanning-based forest inventory, ecosystem models, and to support forest management.
Dominik Seidel   +8 more
doaj   +1 more source

A Comparison of the Effectiveness of Pitfall Traps and Winkler Litter Samples for Characterization of Terrestrial Ant (Formicidae) Communities in Temperate Savannas [PDF]

open access: yes, 2018
Relatively few studies in temperate environments have compared pitfall traps and Winkler litter samples, two of the most commonly used ant (Formicidae) sampling protocols.
Menke, Sean B, Vachter, Nicole
core   +2 more sources

Allometric equations, stem density and biomass expansion factors for Cryptomeria japonica in Mount Halla, Jeju Island, Korea

open access: yesJournal of Ecology and Environment, 2014
This study was conducted to develop allometric equations and to determine the stem density and biomass expansion factor (BEF) for the estimation of the aboveground and belowground biomass of Cryptomeria japonica in Jeju Island, Korea.
Sung Cheol Jung   +3 more
doaj   +1 more source

Size-resolved aerosol fluxes above a temperate broadleaf forest [PDF]

open access: yes, 2018
Aerosol fluxes were measured by eddy-correlation for 8 weeks of the summer and fall of 2011 above a temperate broadleaf forest in central Ontario, Canada.
Geddes, Jeffrey A.   +3 more
core   +1 more source

Advanced Aboveground Spatial Analysis as Proxy for the Competitive Environment Affecting Sapling Development

open access: yesFrontiers in Plant Science, 2019
Tree saplings are exposed to a competitive growth environment in which resources are limited and the ability to adapt determines general vitality and specific growth performance.
Peter Annighöfer   +3 more
doaj   +1 more source

Variations in genetic diversity in cultivated Pistacia chinensis

open access: yesFrontiers in Plant Science, 2022
Identification of the evolution history and genetic diversity of a species is important in the utilization of novel genetic variation in this species, as well as for its conservation.
Biao Han   +9 more
doaj   +1 more source

Global analysis of threat status reveals higher extinction risk in tropical than in temperate bird sister species [PDF]

open access: yes, 2019
Given increasing pressures upon biodiversity, identification of species’ traits related to elevated extinction risk is useful for more efficient allocation of limited resources for nature conservation.
Reif, Jiří, Štěpánková, Klára
core   +2 more sources

Assessing Understory Complexity in Beech-dominated Forests (Fagus sylvatica L.) in Central Europe—From Managed to Primary Forests

open access: yesSensors, 2019
Understory vegetation influences several ecosystem services and functions of European beech (Fagus sylvatica L.) forests. Despite this knowledge on the importance of understory vegetation, it is still difficult to measure its three-dimensional ...
Katharina Willim   +7 more
doaj   +1 more source

How a measure of tree structural complexity relates to architectural benefit‐to‐cost ratio, light availability, and growth of trees

open access: yesEcology and Evolution, 2019
Aboveground tree architecture is neither fully deterministic nor random. It is likely the result of mechanisms that balance static requirements and light‐capturing efficiency.
Dominik Seidel   +9 more
doaj   +1 more source

Ozone and haze pollution weakens net primary productivity in China [PDF]

open access: yes, 2017
Atmospheric pollutants have both beneficial and detrimental effects on carbon uptake by land ecosystems. Surface ozone (O3) damages leaf photosynthesis by oxidizing plant cells, while aerosols promote carbon uptake by increasing diffuse radiation and ...
Feng, Zhaozhong   +8 more
core   +4 more sources

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