Results 91 to 100 of about 308,445 (318)

Topmost trees and foremost species underlie tropical forest structure, diversity and biomass through opposing mechanisms

, 2020
Tropical forests play a main role in the global carbon cycle due to their higher exchange capacity of carbon dioxide with the atmosphere than any other forest type on the Earth.
Wang, Li-Qiu, Mattsson, Eskil,, Arshad, Ali, Nissanka, S.P   +3 more
core   +1 more source

Forest Carbon Density Estimation Using Tree Species Diversity and Stand Spatial Structure Indices

, 2023
The forest spatial structure and diversity of tree species, as the important evaluation indicators of forest quality, are key factors affecting forest carbon storage.
Ming-Yang Li, Yi Wu, Tao Li, Xiao-Can Wu
core   +1 more source

A Two‐Stage Questionnaire and Actigraphy Screening for iRBD in a Multicenter Retrospective Cohort

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Isolated rapid‐eye‐movement sleep behavior disorder is a prodromal marker of synucleinopathies. However, most cases remain undiagnosed due to the insufficient predictive value of questionnaires and limited access to confirmatory video‐polysomnography. We assessed a two‐stage screening strategy combining a brief questionnaire on rapid‐
Caleb A. Massimi, Giorgio Ricciardiello Mejia, Andre Metzger, Kang Hyun Ryu, Salonee Marwaha, Eva Grzegorczyk, Li Zhou, Eliana Jacobs, Boris Gilyadov, Claudia Kunney, Liqhwa Ncube, Ankit Parekh, Emmanuel Mignot, Fanny M. Elahi, Joseph Winer, Kathleen Poston, Andreas Brink‐Kjaer, Emmanuel H. During   +17 more
wiley   +1 more source

Biomass estimation as a function of vertical forest structure and forest height: potential and limitations for radar remote sensing

, 2010
One common method to estimate biomass is measuring forest height and applying allometric equations to get forest biomass. Conditions like changing forest density or changing forest structure bias the allometric relations or biomass estimation fails ...
Papathanassiou, Kostas, Biber, Peter, Torano Caicoya, Astor, Pretzsch, Hans, Hajnsek, Irena, Kugler, Florian   +5 more
core  

Biodiversity in young versus old forest [PDF]

, 2008
This introductory essay has been written with the purpose to form a foundation for my PhD-study. My research task is to analyze how optimal selections of forest reserves can be made, considering biodiversity as well as economy.
Lundström, Johanna
core  

Ownership Patterns Drive Multi-Scale Forest Structure Patterns across a Forested Region in Southern Coastal Oregon, USA

, 2020
Research Highlights: We used airborne lidar to assess the multi-scalar patterns of forest structure across a large (471,000 hectare), multi-owner landscape of the Oregon Coast Range, USA.
Ryan Haugo, Van Kane, Bryce Kellogg, Vivian Griffey   +3 more
core   +1 more source

Assessment of Multiple Scattering in LiDAR Canopy Waveform

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Multiple scattering of laser ray leads to distance calculation error and accumulated intensity error in LiDAR waveform. This study quantitatively assesses multiple scattering in LiDAR canopy waveform and explores its relationship with sensor ...
Xuebo Yang, Cheng Wang, Xiaohuan Xi, Zheng Niu, Dong Li, Sheng Nie, Kaiyi Bi, Ran Wang   +7 more
doaj   +1 more source

Neurochemical Endpoints to Inform Early‐Stage Trials of Spinocerebellar Ataxia 2 and 3 in a Multisite Setting

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Neurochemical levels measured by brain MR spectroscopy (MRS) have been proposed as endpoints for clinical trials in early‐stage spinocerebellar ataxia (SCA) trials. We tested their trial‐readiness by quantifying neurochemicals in three affected brain regions in early‐stage cohorts of SCA2 and SCA3, examining their reproducibility in ...
James M. Joers, Yaqiao Wei, Dinesh K. Deelchand, Adam Berrington, Young Woo Park, Guita Banan, Michal Povazan, Jens T. Rosenberg, André J. W. van der Kouwe, Tetsuo Ashizawa, Khalaf O. Bushara, Chiadi U. Onyike, Sub H. Subramony, Jeremy D. Schmahmann, Brian J. Soher, Peter B. Barker, Thomas H. Mareci, Eva‐Maria Ratai, Lynn E. Eberly, Gülin Öz   +19 more
wiley   +1 more source

Combining spaceborne lidar from the Global Ecosystem Dynamics Investigation with local knowledge for monitoring fragmented tropical landscapes: A case study in the forest–agriculture interface of Ucayali, Peru

Ecology and Evolution
Improving our ability to monitor fragmented tropical ecosystems is a critical step in supporting the stewardship of these complex landscapes. We investigated the structural characteristics of vegetation classes in Ucayali, Peru, employing a co‐production
Savannah S. Cooley, Naiara Pinto, Milagros Becerra, Jorge Washington Vela Alvarado, Jocelyn C. Fahlen, Ovidio Rivera, G. Andrew Fricker, Augusto Rafael De Los Ríos Dantas, Naikoa Aguilar‐Amuchastegui, Yunuen Reygadas, Julie Gan, Ruth DeFries, Duncan N. L. Menge   +12 more
doaj   +1 more source

Clinical Significance of Therapeutic Drug Level Monitoring for Mycophenolate in Patients With Extrarenal Systemic Lupus Erythematosus—A Systematic Review and Meta‐Analysis

Arthritis Care &Research, EarlyView.
Objective Clinical response to mycophenolic acid (MPA) is highly heterogeneous; thus, therapeutic drug level monitoring (TDM) may help improve treatment efficacy. This systematic review and meta‐analysis examined therapeutic ranges for MPA levels associated with better outcomes and safety in patients with systemic lupus erythematosus (SLE ...
Zahraa Qamhieh, Dalia Sriwi, Callie Saric, Tripti Singh, Christie M. Bartels, Shivani Garg   +5 more
wiley   +1 more source