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SciDev.Net (Reino Unido)
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In Rio de Janeiro, thousands at risk from disasters
Publicado em 30 junho 2018
[SÃO PAULO] As many as 155,000 people are exposed to the risk of landslides or floods in highland region of Rio de Janeiro, southeast Brazil, a study published in the International Journal of Disaster Risk Reduction has estimated.
Using a new methodology, researchers from the Brazil’s natural disasters early warning centre Cemaden cross-reference information about areas susceptible to natural disaster with demographic and socioeconomic data provided by the Brazilian Institute of Geography [...]
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Scientists decry Brazil’s move on biodiversity research
Publicado em 28 junho 2018[SÃO PAULO] A legal requirement put in place by the Brazilian government within the framework of a biodiversity law is likely to reduce research on the country’s biological diversity, scientists have warned. As of November last year, the country made it mandatory for local and international researchers and institutions whose work involves Brazilian biodiversity to register all their activities with the National System of Genetic Resource Management and Associated Traditional Knowledge [...]ver notícia -
Regenerative abilities mean sun coral threatens fishing
Publicado em 25 maio 2018[SÃO PAULO] The capacity to regenerate from tiny fragments has given an invasive coral the ability to spread along the Atlantic coast of Brazil, threatening commercial fish supplies, a research paper has found. The coral, known as sun coral, was first detected in Brazil in the late 1980s. It is believed the two species of sun coral discovered reached the Brazilian coast by embedding themselves into the hulls of commercial vessels or large towed structures used to build oil rigs. The sun [...]ver notícia -
Sugarcane ethanol benefits mapped out for Latin America
Publicado em 17 abril 2018[CURITIBA] Producing ethanol from sugarcane could reduce fossil fuel imports in Latin American countries other than Brazil, where sugarcane is already a big part of the energy mix. According to a study that analysed the potential of sugarcane as a cleaner energy source in the region, bagasse — the pulp left after juice is extracted from sugarcane — can also improve electricity access in many countries. Brazilian and Colombian researchers evaluated the potential benefits of this crop for [...]ver notícia -
Latin America’s tropical dry forests fading away
Publicado emSpeed read Tropical dry forests lost in Latin America, 13-year monitoring shows They prevent soil erosion, regulate water balance, support biodiversity Just one of 300 scientific papers on tropical rainforests relates to dry forests [SÃO PAULO] - Only 40 per cent of the “original extent” of tropical dry forests remains intact in Latin America, according to a 13-year-monitoring project. The rest have been irretrievably lost, mainly due to deforestation for pastureland, [...]ver notícia -
Malaria parasite route to Americas traced
Publicado em 27 fevereiro 2018Speed read Malaria parasites circulating in America come from Africa, Asia and Oceania P. vivax suffered more genetic mutations than P. falciparum Findings relevant to malaria symptoms in Brazil and other regions [SÃO PAULO] - Two of the main species of the malaria parasite arrived in the American continent after successive migratory waves and genetic crossbreeding of parasite lineages from Africa, South Asia and Western Pacific. Using blood samples from people infected with two [...]ver notícia -
Tiny pollutants intensify storms in the Amazon
Publicado em 07 fevereiro 2018Speed read Ultrafine particles contribute to storm intensity in Amazon rainforest They come from urban pollution, influence cloud formation Research needed on implications for climate shifts globally [SÃO PAULO] - Ultrafine aerosol particles found in polluted urban air can contribute to more intense storms in the Amazon rainforest, with potential knock-on effects for weather and climate patterns in the region and beyond, researchers have warned. Particles smaller than 50 nanometres [...]ver notícia -
Siren-like invasive toad call may cause Sao Paulo house price drop
Publicado em 30 novembro 2017Speed read Toad species introduced from Antilles makes siren-like sounds House prices expected to drop in Sao Paulo areas near calling sites Toad is one of several invasive species that worry local researchers [SÃO PAULO] The siren-like call of a species of toad introduced into Brazil from the Antilles islands may result in a “sharp drop” in house prices in a São Paulo neighbourhood, according to a study on invasive species. The tiny toad — about 3 centimetres [...]ver notícia -
Fire control harms biodiversity in Brazilian savannah
Publicado em 26 setembro 2017Speed read Biodiversity in Brazilian savannah is partly regulated by fire Suppressing human-caused fire has created more dense forest areas Result is a rise in carbon storage but also biodiversity losses [SÃO PAULO] Policies that prevent fires caused by people in El Cerrado (the Brazilian savannah) lead to biodiversity losses because they promote the expansion of forests with dense vegetation. This is the main conclusion of a study that examined impacts over the last 30 years in [...]ver notícia -
Ethanol to gasoline switch raises nanoparticles in air
Publicado em 14 setembro 2017Speed read Using gasoline instead of ethanol raises ultrafine particle levels by 30 per cent in Brazil Nanoparticles reach deep into the lungs, are not monitored anywhere in the world Sao Paulo has the country’s largest urban fleet of cars that can use either fuel [SAO PAULO] Using ethanol instead of gasoline as a car fuel can reduce emissions of ultrafine particles by a third, which benefits human health and the environment, according to a new study. The research, carried out in [...]ver notícia