Results 41 to 50 of about 3,711 (200)

Development of a portable leaf photosynthesis and volatile organic compounds emission system. [PDF]

open access: yes, 2020
Understanding how plant carbon metabolism responds to environmental variables such as light is central to understanding ecosystem carbon cycling and the production of food, biofuels, and biomaterials. Here, we couple a portable leaf photosynthesis system
de Oliveira Piva, Luani Rosa   +4 more
core   +3 more sources

Chemical Composition and Biological Activities of Essential Oils from Fresh Vismia guianensis (Aubl.) Choisy and Vismia cayennensis (Jacq.) Pers. Leaves

open access: yesResearch, Society and Development, 2021
The Vismia Vand. genus encompasses many species indigenous to the Amazon rain forest where they are popularly known as “Lacre” bark and leaves are widely employed by locals to treat dermatophytoses. The aim of this study was to investigate the chemical composition of essential oils (EOs) extracted from the aerial parts of the species Vismia guianensis (
Antonia Tavares Barbosa   +8 more
openaire   +2 more sources

Migration Patterns of Epiphyllous Bryophyte Metapopulations in Amazonian Fragmented Landscape Inferred From Census and Genomic Data

open access: yesBiotropica, Volume 57, Issue 5, September 2025.
We examined the long‐term genetic consequences of habitat fragmentation on two epiphyllous bryophyte species in experimentally fragmented Amazonian forests. Using genotyping and demographic data, we found species‐specific responses and metapopulation dynamics in relation to their mating system.
Adriel M. Sierra   +3 more
wiley   +1 more source

Florística e estrutura de fragmento florestal em área de transição na Amazônia Matogrossense no município de Sinop Floristics and structure of a forest fragment at a transitional zone at the Amazon in Mato Grosso State, Municipality of Sinop

open access: yesActa Amazonica, 2009
A fragmentação do ambiente é intensa na amazônia matogrossense e é esperado como consequência, além do desaparecimento da vegetação original, que a flora dos fragmentos seja transicional, com elementos de floresta amazônica e de cerrado e que já ...
Rosalia de Aguiar Araujo   +5 more
doaj   +1 more source

Plant functional constraints on foliar N:P ratios in a tropical forest landscape [PDF]

open access: yes, 2009
Although large scale analyses of foliar N:P ratios suggest and overall pattern of P limitation in tropical forests, analyses within the biome are less indicative of a consistent pattern of nutrient limitation.
Carlos A. Sierra
core   +1 more source

Anthropogenic disturbances alter the trophic niche structure and ecological relationships of understory bat communities in the Ecuadorian Andean Chocó

open access: yesWildlife Biology, Volume 2025, Issue 3, May 2025.
Human disturbances have reduced the three basic niche dimensions for the survival of some mammalian species (space, time, and resources). Anthropic activities cause the extinction of ecological functionalities faster than species extinctions. In this study, we identified four types of habitats in the Ecuadorian Andean Chocó: primary forest (PF ...
Marco Antonio Rodríguez‐Segovia   +1 more
wiley   +1 more source

Physiological responses of Vismia guianensis to contraisting light environments. [PDF]

open access: yes, 2013
Investigou-se por um período de 60 dias em câmara de crescimento, sob alto (800-1000 μmol m-2 s-1) e baixo (120-200 μmol m-2 s-1) regimes de luz os padrões de crescimento e distribuição de biomassa e as trocas gasosas de Vismia guianensis (Aubl.
DIAS-FILHO, M. B.
core  

Non‐floral scent sources of orchid bees: Observations and significance

open access: yesBiotropica, Volume 57, Issue 1, January 2025.
We observed male euglossines collecting scent at 21 different non‐floral sources in Central and South America, strengthening the view that these sources play a central role in euglossine perfume biology. A Protium tree provided over 50% of the perfumes for Eufriesea corusca and was repeatedly revisited.
Jonas Henske   +2 more
wiley   +1 more source

Bird perches and artificial bat roosts increase seed rain and seedling establishment in tropical bracken‐dominated deforested areas

open access: yesRestoration Ecology, Volume 32, Issue 7, September 2024.
Tropical forests are being reduced by human activities. The use of fire for agricultural expansion generates areas dominated by the bracken fern Pteridium, where forest regeneration is slow. This may be caused by seed limitation, especially of animal‐dispersed seeds, due to the absence of seed dispersers from the forest in deforested areas, calling for
Cesar Mayta   +5 more
wiley   +1 more source

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