Results 21 to 30 of about 789,108 (324)

Congo Basin forest loss dominated by increasing smallholder clearing

open access: yesScience Advances, 2018
Congo Basin forest loss is dominated by smallholder agriculture with accelerating primary forest loss mirroring population growth. A regional assessment of forest disturbance dynamics from 2000 to 2014 was performed for the Congo Basin countries using ...
A. Tyukavina   +7 more
semanticscholar   +1 more source

Equilibrium ion distribution in the presence of clearing electrodes and its influence on electron dynamics

open access: yes, 2007
Here we compute the ion distribution produced by an electron beam when ion-clearing electrodes are installed. This ion density is established as an equilibrium between gas ionization and ion clearing.
Christian Spethmann   +3 more
core   +2 more sources

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

open access: yesPopulation Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source

CLEAR - Orthokeratology.

open access: yesContact lens & anterior eye : the journal of the British Contact Lens Association, 2021
The CLEAR initiative was facilitated by the BCLA, with financial support by way of Educational Grants for collaboration, publication and dissemination provided by Alcon and CooperVision.
Vincent, Stephen J.   +10 more
openaire   +4 more sources

Network topology drives population temporal variability in experimental habitat networks

open access: yesPopulation Ecology, EarlyView.
Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu   +3 more
wiley   +1 more source

MACS: Rapid Aqueous Clearing System for 3D Mapping of Intact Organs

open access: yesAdvancement of science, 2020
Tissue optical clearing techniques have provided important tools for large‐volume imaging. Aqueous‐based clearing methods are known for good fluorescence preservation and scalable size maintenance, but are limited by long incubation time, insufficient ...
Jingtan Zhu   +12 more
semanticscholar   +1 more source

Mapping and analysis of changes in the riparian landscape structure of the Lockyer Valley Catchment, Queensland, Australia [PDF]

open access: yes, 2002
[Abstract]: A case study of the Lockyer Valley catchment in Queensland, Australia, was conducted to develop appropriate mapping and assessment techniques to quantify the nature and magnitude of riparian landscape structural changes within a catchment ...
Apan, Armando   +2 more
core   +1 more source

Geographic variation in walking activity in the red flour beetle Tribolium castaneum

open access: yesPopulation Ecology, EarlyView.
This study examined whether there is geographic variation in field populations, focusing on the moving activity in the red flour beetle Tribolium castaneum. Results showed significant differences in moving activity among field populations but no correlation with latitude or meteorological factors.
Kentarou Matsumura
wiley   +1 more source

Central Clearing Valuation Adjustment

open access: yes, 2017
This paper develops an XVA (costs) analysis of centrally cleared trading, parallel to the one that has been developed in the last years for bilateral transactions.
Armenti, Yannick, Crépey, Stéphane
core   +2 more sources

Between Droughts and Floods: The Seasonal Response of Freshwater Snails in Artificial Reservoirs in the Brazilian Semiarid Region

open access: yesPopulation Ecology, EarlyView.
We investigate the seasonal dynamics of two freshwater snails, Biomphalaria straminea and Melanoides tuberculata, in artificial reservoirs of the Brazilian semiarid region. Despite regulated hydrology, B. straminea exhibited strong seasonal fluctuations associated with dry periods, while M. tuberculata maintained stable populations throughout the year,
Lucas Henrique Sousa da Silva   +6 more
wiley   +1 more source

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