Results 91 to 100 of about 339,965 (305)

Germination responses to light of four Neotropical forest tree species along an elevational gradient in the southern Central Andes [PDF]

open access: yes, 2020
Seed germination is a key part of plants' life cycle and is mostly affected by the genetic background, the environmental conditions experienced by the mother plant and the seedbed conditions.
Caron, Maria Mercedes   +4 more
core   +1 more source

Breeding Systems of Tree Species of a Lowland Tropical Community [PDF]

open access: yesEvolution, 1974
Little information is available on the breeding systems of tropical forest trees. Yet a knowledge of reproductive methods is essential for an understanding of the patterns of gene flow and genetic differentiation within and between populations. Such information, in turn, is fundamental to an understanding of speciation and the genetic relationships ...
openaire   +2 more sources

Automated Feature Extraction and Classification of Submerged Cultural Heritage Assets in the Puck Lagoon via Multisensor Remote Sensing

open access: yesArchaeological Prospection, EarlyView.
ABSTRACT This study presents a strong framework for the detection and classification of Submerged Cultural Heritage Assets (SCHA) in shallow marine environments using the integration of multibeam echosounder and airborne LiDAR bathymetry with object‐based image analysis and fuzzy logic–based classification.
Łukasz Janowski   +4 more
wiley   +1 more source

Valorization of the peel and husk of guaraná (Paullinia cupana): oil extraction, chemical composition, cytotoxicity, and antitumor potential

open access: yesBiofuels, Bioproducts and Biorefining, EarlyView.
Abstract Guaraná (Paullinia cupana) is a fruit native to the Amazon region. Due to its widespread use, primarily in beverages, its production has grown over the years. The seed is the only commercially valuable part of the fruit so the guaraná production chain generates byproducts, including peel, husk, and spent seed.
Leiliane do Socorro Sodré de Souza   +9 more
wiley   +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

Dendroclimatology using tropical broad-leaved tree species – a review

open access: yesErdkunde, 2017
Global change has led to the warming of the atmosphere and oceans, the diminishment of snow and ice, while the sea level is rising. These changes have widespread impacts on human and natural systems on all continents and across the oceans. In tropical regions, ecosystems and socio-economic cultures become more and more affected by the high ...
openaire   +2 more sources

Does degradation from selective logging and illegal activities differently impact forest resources? A case study in Ghana [PDF]

open access: yes, 2016
Degradation, a reduction of the ecosystem’s capacity to supply goods and services, is widespread in tropical forests and mainly caused by human disturbance.
Cazzolla Gatti, R.   +11 more
core   +1 more source

Quantifying plant dispersal: New methods from multiple disciplines

open access: yes
Applications in Plant Sciences, EarlyView.
Lauren L. Sullivan   +3 more
wiley   +1 more source

A review of the historic and present ecological role of aquatic and shoreline wood, from forest to deep sea

open access: yesBiological Reviews, EarlyView.
ABSTRACT The ecology of forests, their losses, and terrestrial wood decomposition dynamics have been intensively studied and reviewed. In the aquatic realm, reviews have concentrated on large wood (LW) in rivers and the transition from freshwater to marine environments in the Pacific Northwest of North America. However, a comprehensive global synthesis
Jon Dickson   +9 more
wiley   +1 more source

Is interlocked grain an adaptive trait for tropical tree species in rainforest? [PDF]

open access: yes, 2009
Many trees in tropical rain forest exhibit interlocked grain. This phenomenon was observed, using a splitting method, on 10 trees from different genera in French Guiana. There were rather strong variations between and within trees. Different indexes were
Beauchêne, Jacques   +2 more
core  

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