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ECOSEO: Protecting the Amazon Rainforest in the Guiana Shield

The immense Guiana Shield is located in northern South America, between the Amazon and Orinoco rivers. With an area of 270 million hectares, it encompasses approximately one third of Amazonia. The 1.7 billion-year-old geological formation is covered by a vast and diverse tropical forest.  Ranging from lowlands and mid-altitude terrain to the heights of tepuis, geological formations perched above the alluvial plain that are typical of the region, the Guiana Shield is home to a very large variety of habitats, some of which are unique in the world. Still relatively untouched by industrial and extractivist development, which has caused significant destruction elsewhere in Amazonia, the region constitutes one of the rare expanses of well-preserved tropical forest left in the world. Still, it is under threat from gold mining and deforestation and its unique and exceptional biodiversity must be protected.

A vast reservoir of biodiversity, carbon and freshwater for Amazonia

The Amazon rainforest, in particular the forests of the Guiana Shield, are host to an exceptional and rich fauna, with iconic Amazonian animals such as jaguars, Harpy eagles, tapirs and giant otters as well as a large number of endemic species, such as the Guianan Cock-of-the-rock.

It also plays a crucial role in the fight against climate change. The tropical rainforests of the Guiana Shield contain considerable stocks of carbon, in trees and their roots and the soil, as well as in the thousands of plant species they host. It is estimated that close to 18% of the carbon stored in the world’s tropical forests is located in the Guiana Shield.

Huge reserves of freshwater


The Guianas region has huge reserves of freshwater, estimated at about 10% of the world’s reserves.


Water is also omnipresent in this part of Amazonia, to which it lends its name. In Arawak, one of the region’s indigenous languages, Guiana means “land of many waters”. Shared between three huge drainage basins – those of the Amazon, the Orinoco and the rivers of the Atlantic coast, such as the Maroni river between Suriname and French Guiana –, the region’s freshwater represents between 10% and 15% of the world’s reserves.

Together, these components – biodiversity, carbon and water – are the three pillars of natural capital. Little is known about this capital, which has only been infrequently or poorly assessed and must be preserved in order to maintain ecosystems in good condition and functional. The natural capital of the Guiana Shield is still immense, but it is coming under growing pressure from human activities.

The Guiana Plateau The Guiana Plateau
The Guiana Plateau

Forests and watercourses are under increasing pressure from human activities, including gold mining

Despite having one of the highest rates of forest cover in the world – an average of 86% – and relatively low deforestation – less than 1% between 2000 and 2015 – compared to other regions of Amazonia, the ecosystems of the Guiana Shield are facing increasing pressure from human activities, starting with gold mining.

Whether legal or illegal, gold mining is one of the main causes of deforestation in the region. Between the early 1990s and 2018, roughly 215,000 ha of forests and creek and riverbeds were destroyed, in particular over the last decade, during which the affected area tripled. That increase nevertheless progressed relatively differently depending on the territory. The increase observed in 2008-2018 (+ 145,000 ha) was particularly worrisome in the western part of the Guiana Shield, with 61% occurring in Guyana, 32% in Suriname, 5% in French Guiana and 2% in Amapá. Impact levels can be explained by differences in the geological context, but above all in socioeconomic and regulatory conditions. For example, while mercury has been prohibited in French Guiana since 2006, that powerful neurotoxin is still very frequently used in Suriname and Guyana. A project aiming to ban the use of mercury in gold mining, in which WWF is a partner, is currently underway in those two countries. Mercury pollutes watercourses, accumulates in food chains and contaminates indigenous populations, whose diet relies heavily on fish caught locally.

Map of the deforestation due to gold mining on the Guiana Shield up to 2018

Spatial planning in these territories, and in particular the expansion of agricultural and urban areas, also contributes to fragmenting and degrading the forest. Roughly 300,000 ha were converted for agriculture and 85,000 ha were artificialized between 2000 and 2015 at the scale of the four territories studied (Guyana, Suriname, French Guiana and Amapá). These phenomena can be explained by significant population growth in the Guianas and by the very marked increase in the population’s needs for housing, infrastructure, energy and food resources. While ensuring that these vital needs are met, it is essential to adhere to a fair and sustainable development trajectory in order to preserve the long-term balance of the region’s ecosystems.

WWF’s Actions

In 1999,  WWF created a regional office in the Guianas covering Guyana and Suriname, implementing complex multi-donor conservation programs. WWF uses five means of action to achieve its aim of protecting the forests of the Guiana Shield over the long term.

First, together with WWF’s offices in Suriname, Guyana and Brazil, we support a regional cooperation network, the only pertinent scale for action to fight against the environmental pressures whose causes reach beyond administrative and political borders. As part of efforts to protect the Guiana Shield’s forest ecosystems, we have set up a unique and ambitious initiative to assess the region’s natural resources and the benefits the local population derives from them through the project for an Observatory of Ecosystem Services, ECOSEO, with our partners at the government agencies responsible for forestry and the environment in Guyana, Suriname, French Guiana and the Brazilian state of Amapá.

We have thus been able to create a unique set of land use maps at the scale of the four territories, which for the first time ever provides us with a vision of the changes that took place over 15 years, in particular of the deforested areas and the causes behind them. In continuity with earlier initiatives, this work has also made it possible to update mapping of the deforestation due to mining activities using satellite observation, which today allows us to go back almost 20 years (2001-2018). Thus we are the only organization to have produced this valuable indicator illustrating the progression of the phenomenon at a regional scale.



Simplified concept of  the Natural  Capital assessment in 2000 and 2015 on the Guiana Shield


Those ecosystem services are particularly important along the Maroni river, whose drainage basin is shared between Suriname and French Guiana. The region is above all a living area, home to a large population including indigenous Amerindian and Maroon (descendants of runaway slaves) communities, whose ways of life are closely tied to their natural surroundings. Creeks and rivers enable transport by canoe, the forest supplies building materials, food and medicine, and freshwater fish constitute the basis of their diet. Our work made it possible to carry out an initial assessment of these services at the scale of the Maroni river basin, using scientific methods and field data. Our results have highlighted the importance of these services for the local population while at the same time emphasizing the pressures that threaten them, starting with the impacts of gold mining.



Examples of ecosystem services on the Guiana shield

Finally, through its work, WWF seeks to showcase the exceptional natural and cultural heritage of the Guiana Shield beyond the region’s borders, in order to draw attention to the need to preserve it while enabling balanced economic and social development beneficial to local populations. It was to that end that WWF organized an event devoted to the Natural Capital of the Guiana Shield during the IUCN World Conservation Congress in Marseille, France in 2021,  at which the results of the ECOSEO project were presented. Representatives of the Amerindian communities of the Upper Maroni river, from French Guiana and Suriname, were invited to attend to alert the public to the difficulties they are facing in their territory, linked in particular to the degradation of their environment.


Above all, our work, carried out in collaboration with our partners, has made it possible to test, for the first time at such a large scale, a method to assess natural capital, Ecosystem Natural Capital Accounting or ENCA, which is able to qualify and quantify changes taking place in the three major ecosystem compartments: carbon, water and biodiversity. Although it is still partially experimental, this method, recognized by the Convention on Biological Diversity (CBD), confirmed for the Guiana Shield the global importance of its stocks of carbon and freshwater as well as of its vast biodiversity, but also their marked degradation over 15 years, mainly in areas subjected to the pressure of gold mining. This work shows that, beyond their impact on deforestation, which is low when compared to the vastness of these territories, extractive activities affect all ecosystem compartments and the services they deliver to populations.


Video summary of the Natural Capital outcomes presented at the IUCN World conservation congress ni Marseille, France, september 2021




Summary - ECOSEO project booklet

Main steps and outcomes of the ECOSEO project, Ecosystem services observatory of the Guiana Shield

Report - Mapping land use land cover change in the Guiana Shield from 2000 to 2015

Land use and land cover changes maps in Guyana, Suriname, French Guiana and Amapá state in Brazil, between 2000 and 2015

Report - Monitoring the impact of gold mining on the forest cover and freshwater in the Guiana Shield from 2001 to 2018

Maps of the  impact of gold mining in Guyana, Suriname, French Guiana and Amapá state in Brazil from 2001 to 2018

Report - Ecosystem natural capital accounting in the Guiana Shield in 2000 and 2015

Natural capital assessment and changes in 2000 and 2015 on the Guiana Shield

Report - Mapping and assessment of ecosystem services in French Guiana and Suriname

Capacity of the natural habitats to provide ecosystem services in  French Guiana and Suriname

Report - Ecosystem services in the Maroni basin

Overview of the ecosystem services of the transboundary Maroni river basin  and their uses by local communities