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Posts tagged ‘french guiana’

Study on leatherback turtle migration includes data from French Guiana and Suriname

November 11th, 2010

Leatherback turtle heading for the sea, French GuianaThe latest issue of the open-access journal PLoS ONE includes an article on the migratory patterns of Atlantic leatherback turtles. Contributing research was carried out in French Guiana and Suriname, with the assistance of WWF Guianas. Here’s an extract from the article abstract:

Sea turtles are long-distance migrants with considerable behavioural plasticity in terms of migratory patterns, habitat use and foraging sites within and among populations. However, for the most widely migrating turtle, the leatherback turtle Dermochelys coriacea, studies combining data from individuals of different populations are uncommon. Such studies are however critical to better understand intra- and inter-population variability and take it into account in the implementation of conservation strategies of this critically endangered species. Here, we investigated the movements and diving behaviour of 16 Atlantic leatherback turtles from three different nesting sites and one foraging site during their post-breeding migration to assess the potential determinants of intra- and inter-population variability in migratory patterns.

Intra- and inter-population behavioural variability may therefore be linked with initial hatchling drift scenarios and be highly influenced by environmental conditions. This high degree of behavioural plasticity in Atlantic leatherback turtles makes species-targeted conservation strategies challenging and stresses the need for a larger dataset (>100 individuals) for providing general recommendations in terms of conservation.

The complete article is available for your perusal at the PLoS ONE website.

[Photo: rustinpc]

vacancy: chief technical advisor, guiana shield facility project, undp guyana

October 12th, 2010

From UN Jobs:

Chief Technical Advisor, Guyana

Under the direct supervision of the DRR, the Chief Technical Advisor will have overall responsibility for co-coordinating and implementing the Guiana Shield Facility (GSF) project in the country office.

The GSF is a multi-donor funding facility, with the European Union being a key donor. The facility aims at supporting the conservation and sustainable development of the Guiana Shield eco-region. The Guiana Shield covers 250 million hectares, is bio-diverse and culturally rich, and contains about 10-15% of the earth’s freshwater supply.

The GSF is designed to enable the six Guiana shield countries (Brazil, Colombia, French Guiana, Guyana, Suriname and Venezuela) and their local communities to develop, finance, manage and benefit from their natural resources. This will be achieved through the delivery of support to activities that contribute to the design of financing mechanisms for forest and nature conservation and management, information sharing, and sustainable livelihood generation.

The Chief Technical Advisor will provide technical leadership to the GSF Project, and work in close collaboration with governments, other UNDP country offices within the Guiana Shield, international NGOs and civil society in the Guiana Shield countries to identify and support priorities for conservation and sustainable development.

Periodic travel to other Guiana Shield countries would be required.

Get more details at unjobs.org. The closing date for applications is Friday, October 15 2010.

report forthcoming on environmental impacts of mining in the guianas

October 12th, 2010

Sunrise over the forests of French GuianaThe Kaieteur News reports that today WWF Guianas will be publishing a report on the impacts of small and medium scale mining on forests in Guyana, Suriname, French Guiana and Northern Brazil:

WWF Guianas will … be presenting the results of an assessment done to determine the deforestation rates of small and medium scale mining in Guyana, the organization announced yesterday.

The assessment was funded by FFEM, DGIS and WWF-NL and falls under the Gold Mining Pollution Abatement component of the Guianas Sustainable Natural Resource Management Project 2007-2011.

In September 2008, WWF Guianas, in collaboration with the ONF (National Forestry Office, France) commissioned the assessment using satellite images and other digitized data to determine the rate of deforestation of areas in Guyana, Suriname French Guiana and Northern Brazil (Amapa) due to small and medium scale mining activities.

The studies were done for base year 2000 and correlated with 2008 to determine the rate over the eight-year period and corresponding maps were developed.

“WWF recognizes the urgent need for immediate action in the interior of the Guianas (Guyana, Suriname and French Guiana) to minimize degradation. The use of inappropriate mining practices is creating extensive damage to the fragile tropical environment in the mining areas.”

According to WWF Guianas, gold deposits in the Guianas are associated with the Greenstone Belt, an ancient metamorphic rock formation that cuts rights through the Guyanas from east to west, and has the potential for hosting precious metals such as gold.

“Hydraulic mining is the most common gold mining method used in the Guianas today. Current estimates suggest that there are about 5,000 to 8,000 mining units in operation; each unit employs about eight persons. Heavy equipment and powerful hydraulic jets are used to remove the overburden and the forest cover in order to expose the ore body.”

When heavy equipment is used large piles of overburden can be seen next to the excavated mining pits. Because the soil in these piles is loose it erodes quickly into nearby creeks and rivers causing increased turbidity and siltation. When the hydraulic system is used to remove the overburden it disappears as effluent into the waterways. No effort is made to protect the aesthetic or the physical values of some areas, the organization said.

Deforestation from gold mining causes significant erosion in the sloping landscapes of the mining areas, leading to changes in soil quality which slows down forest regeneration.

The large volume of discharge of effluent from hydraulic mining operations also causes turbidity and siltation downstream from the mining sites. Large plumes can be seen emerging from the creek that flow into the main rivers, discoloring the dark brown water into muddy brown.

These discharges are destroying floral ecosystems and causing a significant shift in fish populations, reducing the much desired species and allowing species that are not consumed to proliferate. Disturbances in terrain and hydrology also result in stagnant pools that become breeding places for malaria vectors. The illegal and uncontrolled gold mining is having an impact on nature conservation efforts in the Guianas.

I’ll update this post with a link to the report if/when I can find a copy online.

In the meantime have a look at the full article at the Kaieteur News website. Also of interest: more on WWF’s work in the Guianas, and information specifically about their goldmining pollution abatement efforts and their work on sustainable forest management.

[Photo: WWF-Canon / Roger LeGuen]

learning from pre-columbian agriculture in french guiana

April 19th, 2010

Nouragues, French GuianaIn French Guiana, a multi-disciplinary research team finds that ancient indigenous farming systems may provide lessons for modern agriculture and ecological studies.

The coastal plain of the Guianas plateau, from Cayenne Island to Guyana, is dotted with thousands of small mounds, which at first sight appear to be rather commonplace mounds of earth. Were these small elevated structures created by natural processes? For local inhabitants, their origin is mysterious, and a great range of notions abounds. Some believe, for example, that these mounds could have resulted from the repeated passage of cattle in these marshy savannas. However, archaeological studies carried out in the late 1980′s had already shown that these structures were created by humans.

This study confirms first of all that pre-Columbian farmers built the vast complexes of raised fields found in Guianan savannas. This coastal fringe, considered inhospitable, is subjected to seasonal flooding (an alternation of periods of rain and drought). The Amerindians constructed mounds to make well-drained soil, permitting intensive sedentary agriculture. They thus efficiently applied agricultural engineering to exploit lands that are today considered unsuitable for farming. The researchers succeeded in precisely dating some of these fields: one of the sites dates back to the 12th century, while the second is yet another century older.

These self-organized ecosystems are the depositories of the ecological legacy of the pre-Columbian inhabitants of Amazonia. The agricultural technique of raised fields, today largely forgotten, could be a source of ideas for designing ecologically intensive agricultural systems. These results show how some ecosystems have been conserved over centuries and help us better understand the history of Amazonian biodiversity.

Read more at Science Daily.

[Photo: Sean McCann]

passion flowers in french guiana

April 5th, 2010

Passion flowerBotanist John Vanderplank recently travelled to French Guiana on an expedition to study passion flowers. On his return, he spoke to the Guardian newspaper about his passion for these flowers.

The passion flower also has a fascinating history also because of its chemical properties. It has been used as a sedative and a wonderful perfume. It is also undergoing scientific trials in the US for treating diseases such as cancer.

An ancestor of the passion flower grows in Africa but the passion flower is mostly found in South America, the Caribbean and Australia.

But all is not well with the passion flower. Deforestation for cattle ranching and farming threatens their habitat. I am determined to try to conserve and study the passion flowers. One way I am doing this is growing them in my greenhouses in the UK, educating the public about them, showing them around the greenhouses, writing about them and learning more and more about them

In 2009 a new species of passion flower,Passiflora curva, was discovered in French Guiana [link to PDF file] by botanist Christian Feuillet, who shared photos of the new species on Flickr, along with many other wonderful photos from that field trip.

[Photo: TarikB at Flickr]

aquaculture network for the americas

March 31st, 2010

Dominica fishThe Aquaculture Network for the Americas was formally established last week in Brazil. With the support of the FAO, the Network aims to promote the sustainable development of aquaculture (also known as fish farming) in Latin America and the Caribbean.

The importance of the initiative was reaffirmed by FAO’s Regional representative for the Latin America, and the Caribbean, José Graziano da Silva. “The idea of an aquaculture network was originated in the area, but we couldn’t, until now, organize ourselves to show our strength,” said Mr. Graziano. Countries from Asia and the Pacific have their network since 17 years ago. “Now we have to reach them,” he said.

Mr Graziano emphasized the symbology in the fight against starvation. “The fish is associated with multiplication; it is a fertility symbol for several countries. It also comes to mind because of the expression ‘you cannot give the fish, but teach how to fish’. This idea of ‘we are going to teach how to fish’ is what will make the RAA even more than a productive sector,” asserted Mr. Graziano.

Caribbean countries represented in the network include Belize, Cuba, the Dominican Republic, Haiti, French Guiana and Trinidad and Tobago.

A 1999 FAO report on aquaculture was titled Aquaculture – new opportunities and a cause for hope:

Since 1984, global aquaculture output has increased at an average annual rate of about 10 percent, compared with a 3 percent increase for livestock meat and 1.6 percent increase for capture fisheries. Aquaculture is emerging as a major source of food and income, thus making it a significant contributor to food security.

However, there are significant environmental concerns about the practice of aquaculture and its intensification:

Aquaculture, the farming of aquatic organisms such as fish, molluscs, crustaceans and plants, is the fastest growing food production sector in the world, but its sustainability is not assured. Pollution, destruction of sensitive coastal habitats, threats to aquatic biodiversity and significant socio-economic costs must be balanced against the substantial benefits. Aquaculture has great potential for food production and the alleviation of poverty for people living in coastal areas, many of who are among the poorest in the world. A balance between food security and the environmental costs of production must be attained.

[Photo: Yelena Spasova at Flickr]