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2.
Proc Natl Acad Sci U S A ; 116(51): 25491-25496, 2019 12 17.
Artículo en Inglés | MEDLINE | ID: mdl-31792172

RESUMEN

Water bodies (WBs), such as lakes, ponds, and impoundments, provide essential ecosystem services for human society, yet their characteristics and changes over large areas remain elusive. Here we used unprecedented data layers derived from all Landsat images available between 1984 and 2015 to understand the overall characteristics and changes of WBs between 2 epochs (i.e., 1984 to 1999 and 2000 to 2015) in China. Results show that the abundance estimate of WBs greater than 1 km2 and the total WB surface area were 0.3 to 1.5 times and 0.2 to 0.5 times more than the previous estimates, respectively. The size-abundance and shoreline-area relationships of WBs in China conformed to the classic power scaling law, in contradiction to most previous studies. WB changes with various occurrence probabilities show widespread coexistence of disappearance of existent and emergence of new WBs across China driven primarily by human activities and climate change. Our results highlight the importance of using appropriate long-term satellite data to reveal the true properties and dynamics of WBs over large areas, which is essential for developing scaling theories and understanding the relative impacts of human activities and climate change on water resources in the world.

3.
Science ; 353(6306): 1383-1387, 2016 09 23.
Artículo en Inglés | MEDLINE | ID: mdl-27708031

RESUMEN

Seasonally dry tropical forests are distributed across Latin America and the Caribbean and are highly threatened, with less than 10% of their original extent remaining in many countries. Using 835 inventories covering 4660 species of woody plants, we show marked floristic turnover among inventories and regions, which may be higher than in other neotropical biomes, such as savanna. Such high floristic turnover indicates that numerous conservation areas across many countries will be needed to protect the full diversity of tropical dry forests. Our results provide a scientific framework within which national decision-makers can contextualize the floristic significance of their dry forest at a regional and continental scale.


Asunto(s)
Biodiversidad , Conservación de los Recursos Naturales/métodos , Bosques , Árboles , Región del Caribe , Toma de Decisiones , Pradera , América Latina , Estaciones del Año , Clima Tropical , Madera
4.
Sci Rep ; 6: 32050, 2016 08 24.
Artículo en Inglés | MEDLINE | ID: mdl-27555345

RESUMEN

Cocoa butter is the pure butter extracted from cocoa beans and is a major ingredient in the chocolate industry. Global production of cocoa is in decline due to crop failure, diseases and ageing plantations, leading to price fluctuations and the necessity for the industry to find high quality cocoa butter alternatives. This study explored the potential of a wild mango (Mangifera sylvatica), an underutilised fruit in south-east Asia, as a new Cocoa Butter Alternative (CBA). Analyses showed that wild mango butter has a light coloured fat with a similar fatty acid profile (palmitic, stearic and oleic acid) and triglyceride profile (POP, SOS and POS) to cocoa butter. Thermal and physical properties are also similar to cocoa butter. Additionally, wild mango butter comprises 65% SOS (1, 3-distearoyl-2-oleoyl-glycerol) which indicates potential to become a Cocoa Butter Improver (an enhancement of CBA). It is concluded that these attractive properties of wild mango could be prompted by a coalition of policy makers, foresters, food industries and horticulturists to promote more widespread cultivation of this wild fruit species to realise the market opportunity.


Asunto(s)
Alimentos , Frutas/química , Mangifera/química , Grasas de la Dieta , Ácidos Grasos/análisis , Triglicéridos/análisis
5.
In. Ahmad, Rafi, ed. Natural hazards and hazard management in the greater Caribbean and Latin America : Proceedings of the second caribbean conference on natural hazards and disasters held in Kingston, Jamaica. Kingston, Jamaica. University of the West Indies. Unit for Disaster Studies, 1997. p.112-23, mapas, tab. (Publication, 3).
Monografía en En | Desastres | ID: des-10737

RESUMEN

Landslides are verry common on Jamaican roads, and the consequences of these slides are costly. We have corried out a rapid assessment of landslides hazard alone the Guinea Corn to Corner Shop Road, via Johns Hall in Central jamaican identify road sections where bio-engineering may be used for the effective road maintenance. This road is subject to recurrent landslide activity and flooding following every significant rainfall event in the Mahoe River watershed. The existing vegetation types along the road have been described in term of their fuction in arresting slope movements and the protective cover they offer against infiltration. In areas where vegetation cover is inadequate or instability observed, recommendations are made as to vegetation types and techniques which may be implemented for slope stabilization. Many of the initiatives currently practiced by local population alrealy make a positive contribution to road-side stabilization. This research programme has been initiated in jamaica jointly by Natural Resoreces Institute (UK) and Departments og Geography and Geology, and Life Sciences, University of the West Indies, Mona. (AU)


Asunto(s)
Deslizamientos de Tierra , Biología del Suelo , Ingeniería , Estabilización de la Matéria Orgánica , Jamaica , Geografía , Geología
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