Results 31 to 40 of about 129,063 (307)

Do the recent severe droughts in the Amazonia have the same period of length? [PDF]

open access: yes, 2015
We propose a new measure based on drought period length to assess the temporal difference between the recent two severe droughts of 2005 and 2010 in the Amazonia.
Kurths, Jürgen   +4 more
core   +3 more sources

Changes in Soil-Borne Communities of Arbuscular Mycorrhizal Fungi during Natural Regrowth of Abandoned Cattle Pastures Are Indicative of Ecosystem Restoration

open access: yesAgronomy, 2021
Natural restoration of ecosystems includes the restoration of plant-microbial associations; however, few studies had documented those changes in tropical ecosystems.
Carlos H. Rodríguez-León   +4 more
doaj   +1 more source

Flower color variation in Digitalis purpurea: Pollination and soil influences across native and introduced populations

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Flower color, a key trait influencing plant–pollinator interactions, may be influenced by abiotic factors such as soil. We investigated association between pollinators, soil characteristics, and flower color variations in Digitalis purpurea across native populations in Sweden and introduced populations in Bolivia.
Sissi Lozada‐Gobilard   +6 more
wiley   +1 more source

Recovery of above-ground tree biomass after moderate selective logging in a central Amazonian forest

open access: yesiForest - Biogeosciences and Forestry, 2018
We examined the recovery and dynamics of living tree above-ground biomass (AGB) after selective logging in an Amazonian terra firme forest managed by a private company.
Otani T   +9 more
doaj   +1 more source

Genomic variation in a widespread Neotropical bird (Xenops minutus) reveals divergence, population expansion, and gene flow [PDF]

open access: yes, 2014
Elucidating the demographic and phylogeographic histories of species provides insight into the processes responsible for generating biological diversity, and genomic datasets are now permitting the estimation of histories and demographic parameters with ...
Brumfield, Robb T., Harvey, Michael G.
core   +3 more sources

Molecular Profiling of Genes Associated With Methylphenidate Pathway Therapy and Discovery of New Variants in Amazonian Amerindian Populations

open access: yesAmerican Journal of Medical Genetics Part B: Neuropsychiatric Genetics, EarlyView.
ABSTRACT In Attention Deficit Hyperactivity Disorder (ADHD), methylphenidate is one of the most widely used drugs, in which patient response significantly impacts prognosis. This study aimed to characterize the molecular profile of 10 genes associated with methylphenidate therapy.
Aline Pasquini Santos   +14 more
wiley   +1 more source

Impact of forest concessions on local jobs in central amazon

open access: yesTrees, Forests and People, 2020
In the humid tropics, forest concessions have become the main mechanism of access to public forest resources. In Brazil, forest concessions began in 2006 with the creation of local jobs as one of its assumptions.
Jime Rodrigues Ribeiro   +2 more
doaj   +1 more source

Efficient plot-based floristic assessment of tropical forests [PDF]

open access: yes, 2003
The tropical flora remains chronically understudied and the lack of floristic understanding hampers ecological research and its application for large-scale conservation planning.
Chuspe Zans, M.   +9 more
core   +1 more source

Sampling design may obscure species–area relationships in landscape-scale field studies [PDF]

open access: yes, 2020
We investigated 1) the role of area per se in explaining anuran species richness on reservoir forest islands, after controlling for several confounding factors.
Bueno, Anderson Saldanha   +3 more
core   +1 more source

Neuroanatomical diversity in Teleocichla with new volumetric and histological insights into the encephalon of Teleocichla monogramma Kullander 1988

open access: yesThe Anatomical Record, EarlyView.
Abstract Teleocichla comprises small cichlids that inhabit the rapid streams of Amazonian rivers; however, there has been limited research on their encephalon morphology. This study examined the neuroanatomy of four species, focusing on volumetric measurements of their encephalon subregions, and providing a histological description of the encephalon of
Renan Leão‐Reis   +4 more
wiley   +1 more source

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