RAINFOREST INFORMATION

A Place Out of Time: Tropical Rainforests and the Perils They Face - information on tropical forests, deforestation, and biodiversity

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BACKGROUND INFORMATION ON THE RAINFOREST

Rainforests are forest ecosystems characterized by high levels of rainfall, an enclosed canopy and high species diversity. While tropical rainforests are the best-known type of rainforest and the focus of this section of the web site, rainforests are actually found widely around the world, including temperate regions in Canada, the United States, and the former Soviet Union.

Tropical rainforests typically occur in the equatorial zone between the Tropic of Cancer and Tropic of Capricorn, latitudes that have warm temperatures and relatively constant year-round sunlight. Tropical rainforests merge into other types of forest depending on the altitude, latitude, and various soil, flooding, and climate conditions. These forest types form a mosaic of vegetation types which contribute to the incredible diversity of the tropics.

The bulk of the world's tropical rainforest occurs in the Amazon Basin in South America. The Congo Basin and Southeast Asia, respectively, have the second and third largest areas of tropical rainforest. Rainforests also exist on some the Caribbean islands, in Central America, in India, on scattered islands in the South Pacific, in Madagascar, in West and East Africa outside the Congo Basin, in Central America and Mexico, and in parts of South America outside the Amazon. Brazil has the largest extent of rainforest of any country on Earth.

Rainforests provide important ecological services, including storing hundreds of billions of tons of carbon, buffering against flood and drought, stabilizing soils, influencing rainfall patterns, and providing a home to wildlife and Indigenous people. Rainforests are also the source of many useful products upon which local communities depend.

While rainforests are critically important to humanity, they are rapidly being destroyed by human activities. The biggest cause of deforestation is conversion of forest land for agriculture. In the past subsistence agriculture was the primary driver of rainforest conversion, but today industrial agriculture — especially monoculture and livestock production — is the dominant driver of rainforest loss worldwide. Logging is the biggest cause of forest degradation and usually proceeds deforestation for agriculture.

Organization of this site

The rainforest section of Mongabay is divided into ten "chapters" (the original text for the site was a book, but has since been adapted for the web), with add-on content in the form of special focal sections (e.g. The Amazon, the Congo, REDD, New Guinea, Sulawesi, Forests in Brazil, etc), appendices, and other resources.

There is also a version of the site geared toward younger readers at kids.mongabay.com.

ABOUT THE RAINFOREST (SUMMARY)

RAINFOREST DISTRIBUTION AND CHARACTERISTICS

Each rainforest is unique, but there are certain features common to all tropical rainforests.

• Location: rainforests lie in the tropics.
• Rainfall: rainforests receive at least 80 inches (200 cm) of rain per year.
• Canopy: rainforests have a canopy, which is the layer of branches and leaves formed by closely spaced rainforest trees some 30 meters (100 feet) off the ground. A large proportion of the plants and animals in the rainforest live in the canopy.
• Biodiversity: rainforests have extraordinarily highs level of biological diversity or “biodiversity”. Scientists estimate that about half of Earth's terrestrial species live in rainforests.
• Ecosystem services: rainforests provide a critical ecosystem services at local, regional, and global scales, including producing oxygen (tropical forests are responsible for 25-30 percent of the world's oxygen turnover) and storing carbon (tropical forests store an estimated 229-247 billion tons of carbon) through photosynthesis; influencing precipitation patterns and weather; moderating flood and drought cycles; and facilitating nutrient cycling; among others.

The global distribution of tropical rainforests can be broken up into four biogeographical realms based roughly on four forested continental regions: the Afrotropical, the Australiasian, the Indomalayan/Asian, and the Neotropical. Just over half the world's rainforests lie in the Neotropical realm, roughly a quarter are in Africa, and a fifth in Asia.

These realms can be further divided into major tropical forest regions based on biodiversity hotspots, including:

1. Amazon: Includes parts of Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Venezuela
2. Congo: Includes parts of Cameroon, Central African Republic, Democratic Republic of the Congo, Equatorial Guinea, Gabon, Republic of Congo
3. Australiasia: Includes parts of Australia, Indonesian half of New Guinea, Papua New Guinea
4. Sundaland: Includes parts of Brunei, Indonesia, Malaysia, Singapore
5. Indo-Burma: Includes parts of Bangladesh, Cambodia, China, India, Laos, Myanmar, Thailand, Vietnam
6. Mesoamerica: Includes parts of Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama
7. Wallacea: Sulawesi and the Maluku islands in Indonesia
8. West Africa: Includes parts of Benin, Cameroon, Côte d'Ivoire, Ghana, Guinea, Liberia, Nigeria, Sierra Leone, Togo
9. Atlantic forest: Includes parts of Argentina, Brazil, Paraguay
10. Choco: Includes parts of Colombia, Ecuador, Panama

Other countries that have large areas of rainforest include Bolivia, Cameroon, Central African Republic, Ecuador, Gabon, Guyana, India, Laos, Malaysia, Mexico, Myanmar, Papua New Guinea, Republic of Congo, Suriname, and Venezuela.

Cover and loss by rainforest region

RAINFOREST STRUCTURE

Rainforests are characterized by a unique vegetative structure consisting of several vertical layers including the overstory, canopy, understory, shrub layer, and ground level. The canopy refers to the dense ceiling of leaves and tree branches formed by closely spaced forest trees. The upper canopy is 100-130 feet above the forest floor, penetrated by scattered emergent trees, 130 feet or higher, that make up the level known as the overstory. Below the canopy ceiling are multiple leaf and branch levels known collectively as the understory. The lowest part of the understory, 5-20 feet (1.5-6 meters) above the floor, is known as the shrub layer, made up of shrubby plants and tree saplings.

RAINFOREST BIODIVERSITY

Tropical rainforests support the greatest diversity of living organisms on Earth. Although they cover less than 2 percent of Earth’s surface, rainforests house more than 50 percent of the plants and animals on the planet.

THE RAINFOREST CANOPY

In the rainforest most plant and animal life is not found on the forest floor, but in the leafy world known as the canopy. The canopy, which may be over 100 feet (30 m) above the ground, is made up of the overlapping branches and leaves of rainforest trees. Scientists estimate that more than half of life in the rainforest is found in the trees, making this the richest habitat for plant and animal life.

The conditions of the canopy are markedly different from the conditions of the forest floor. During the day, the canopy is drier and hotter than other parts of the forest, and the plants and animals that live there have adapted accordingly. For example, because the amount of leaves in the canopy can make it difficult to see more than a few feet, many canopy animals rely on loud calls or lyrical songs for communication. Gaps between trees mean that some canopy animals fly, glide, or jump to move about in the treetops. Meanwhile plants have evolved water-retention mechanisms like waxy leaves.

Scientists have long been interested in studying the canopy, but the height of trees made research difficult until recently. Today the canopy is commonly accessed using climbing gear, rope bridges, ladders, and towers. Researchers are even using model airplanes and quadcopters outfitted with special sensors — conservation drones — to study the canopy.

The rainforest floor

The rainforest floor is often dark and humid due to constant shade from the leaves of canopy trees. The canopy not only blocks out sunlight, but dampens wind and rain, and limits shrub growth.

Despite its constant shade, the ground floor of the rainforest is the site for important interactions and complex relationships. The forest floor is one of the principal sites of decomposition, a process paramount for the continuance of the forest as a whole. It provides support for trees responsible for the formation of the canopy and is also home to some of the rainforest's best-known species, including gorillas, tigers, tapirs, and elephants, among others.

Rainforest waters

Tropical rainforests support some of the largest rivers in the world, like the Amazon, Mekong, Negro, Orinoco, and Congo. These mega-rivers are fed by countless smaller tributaries, streams, and creeks. For example, the Amazon alone has some 1,100 tributaries, 17 of which are over 1,000 miles long. Although large tropical rivers are fairly uniform in appearance and water composition, their tributaries vary greatly.

Rainforest waters are home to a wealth of wildlife that is nearly as diverse as the biota on land. For example, more than 5,600 species of fish have been identified in the Amazon Basin alone.

But like rainforests, tropical ecosystems are also threatened. Dams, deforestation, channelization and dredging, pollution, mining, and overfishing are chief dangers.

Rainforest people

Tropical rainforests have long been home to tribal peoples who rely on their surroundings for food, shelter, and medicines. Today very few forest people live in traditional ways; most have been displaced by outside settlers, have been forced to give up their lifestyles by governments, or have chosen to adopt outside customs.

Of the remaining forest people, the Amazon supports the largest number of Indigenous people living in traditional ways, although these people, too, have been impacted by the modern world. Nonetheless, Indigenous peoples' knowledge of medicinal plants remains unmatched and they have a great understanding of the ecology of the Amazon rainforest.

In Africa there are native forest dwellers sometimes known as pygmies. The tallest of these people, also called the Mbuti, rarely exceed 5 feet in height. Their small size enables them to move about the forest more efficiently than taller people.

There are few forest peoples in Asia living in fully traditional ways. The last nomadic people in Borneo are thought to have settled in the late 2000's. New Guinea and the Andaman Islands are generally viewed as the last frontiers for forest people in Asia and the Pacific.

Deforestation

In recent decades there has been an important shift in deforestation trends. Today export-driven industries are driving a bigger share of deforestation than ever before, marking a shift from previous decades, when most tropical deforestation was the product of poor farmers trying to put food on the table for their families. There are important implications from this change. While companies have a greater capacity to chop down forests than small farmers, they are more sensitive to pressure from environmentalists. Thus in recent years, it has become easier—and more ethical—for green groups to go after corporations than after poor farmers.

Rainforests are also threatened by climate change, which is contributing to droughts in parts of the Amazon and Southeast Asia. Drought causes die-offs of trees and dries out leaf litter, increasing the risk of forest fires, which are often set by land developers, ranchers, plantation owners, and loggers.

Rainforest importance

While rainforests may seem like a distant concern, they are critically important for our well-being. Rainforests are often called the lungs of the planet for their role in absorbing carbon dioxide, a greenhouse gas, and producing oxygen, upon which all animals depend for survival. Rainforests also stabilize climate, house incredible amounts of plants and wildlife, and produce nourishing rainfall all around the planet.

Rainforests:

• Help stabilize the world’s climate: Rainforests help stabilize the world’s climate by absorbing carbon dioxide from the atmosphere. Scientists have shown that excess carbon dioxide in the atmosphere from human activities is contributing to climate change. Therefore, living rainforests have an important role in mitigating climate change, but when rainforests are chopped down and burned, the carbon stored in their wood and leaves is released into the atmosphere, contributing to climate change.
• Provide a home to many plants and animals: Rainforests are home to a large number of the world’s plant and animals species, including many endangered species. As forests are cut down, many species are doomed to extinction.
• Help maintain the water cycle: The role of rainforests in the water cycle is to add water to the atmosphere through the process of transpiration (in which plants release water from their leaves during photosynthesis). This moisture contributes to the formation of rain clouds, which release the water back onto the rainforest. In the Amazon, 50-80 percent of moisture remains in the ecosystem’s water cycle. When forests are cut down, less moisture goes into the atmosphere and rainfall declines, sometimes leading to drought. Rainforests also have a role in global weather patterns. For example researchers have shown that forests in South America affect rainfall in the United States, while forests in Southeast Asia influence rain patterns in southeastern Europe and China. Distant rainforests are therefore important to farmers everywhere.
• Protect against flood, drought, and erosion: Rainforests have been compared to natural sponges, moderating flood and drought cycles by slowing run-off and contributing moisture to the local atmosphere. Rainforests are also important in reducing soil erosion by anchoring the ground with their roots. When trees are cut down there is no longer anything to protect the ground, and soils are quickly washed away with rain. On steep hillsides, loss of forest can trigger landslides.
• Are a source for medicines and foods and support forest-dependent people: People have long used forests as a source of food, wood, medicine, and recreation. When forests are lost, they can no longer provide these resources. Instead people must find other places to get these goods and services. They also must find ways to pay for the things they once got for free from the forest.

Rainforest conservation

Rainforests are disappearing very quickly. The good news is there are a lot of people who want to save rainforests. The bad news is that saving rainforests will be a challenge as it means humanity will need to shift away from business-as-usual practices by developing new policies and economic measures to creative incentives for preserving forests as healthy and productive ecosystems.

Over the past decade there has been considerable progress on several conservation fronts. Policymakers and companies are increasingly valuing rainforests for the services they afford, setting aside large blocks of forests in protected areas and setting up new financial mechanisms that compensate communities, state and local governments, and countries for conserving forests. Meanwhile, forest-dependent people are gaining more management control over the forests they have long stewarded. Large international companies are finally establishing policies that exclude materials sourced via deforestation. People are abandoning rural areas, leading to forest recovery in some planes.

But the battle is far from over. Growing population and consumption means that rainforests will continue to face intense pressures. At the same time, climate change threatens to dramatically alter temperatures and precipitation patterns, potentially pushing some forests toward critical tipping points.

Thus the future of the world's rainforests in very much in our hands. The actions we take in the next 20 years will determine whether rainforests, as we currently know them, are around to sustain and nourish future generations of people and wildlife.

The Latest News on Rainforests

Bolivia Indigenous communities, local gov’ts help protect nearly 1 million hectares (Feb 6 2026)
- Bolivia has created four new protected areas covering 907,244 hectares (2.2 million acres) of Amazon lowlands and Andean highlands, creating corridors intended to improve wildlife migration and maintain forest-based economies for local families.
- Because the creation of nationally protected areas has slowed in Bolivia in recent years, conservation groups have looked to departmental and local governments for help protecting the rainforest.
- The new protected areas help strengthen wildlife corridors between larger national parks.

What’s next for the major pledge to halt & reverse Congo Basin deforestation? (Feb 5 2026)
- In January, high-level policymakers came together to discuss the implementation of the recent Belém Call to Action for the Congo Basin Forests, a $2.5 billion pledge to conserve the world’s second-largest rainforest.
- Central topics included the need for innovative funding approaches, such as moving beyond traditional donors in the Global North, direct funding for communities, the need to fund projects that link forest conservation with socioeconomic development and how to halt and reverse deforestation by 2030.
- For this commitment to work, where other environmental pledges have failed, panelists said there must be clear, traceable financing channels, strong institutional coordination, strong legal frameworks and genuine engagement of civil society and local actors.
- The Congo Basin, covering several Central African countries in a wide green canopy, is facing several threats, chronic underfunding — and attention — for its conservation.

Successful campaign proves Ghana’s forests are worth more than gold (commentary) (Feb 5 2026)
- An unprecedented campaign recently pushed Ghana’s government to repeal legislation allowing mining in forest reserves.
- Originally passed in 2022, the regulations had opened up nearly 90% of Ghana’s forest reserves to mining, but the campaign spurred nationwide protests, petitions, a strike and a prayer walk on the streets of Accra.
- “Together, we rallied behind the idea that our forests are more important to us than gold. But as momentous as repealing the legislation is, it’s only a staging post in a longer journey to end the devastation that mining is inflicting in Ghana,” a new op-ed argues.
- This article is a commentary. The views expressed are those of the author, not necessarily of Mongabay.

From above: Aerial Borneo (Feb 3 2026)
Aerial photography invites a level of uncertainty. The ground offers clues but rarely the full picture. Once the view lifts, certain patterns begin to register: peat-dark water cutting through forest, the abrupt change from canopy to cleared land, the geometry of river bends, or mountains rising in the distance. At times, the colors can be […]

The fair costs for forest rehabilitation in Indonesia (commentary) (Feb 2 2026)
- Aida Greenbury, a sustainability leader and forestry expert, argues that Indonesia’s plan to spend US$9.2 billion in public funds to rehabilitate degraded forests lacks transparency and risks placing the financial burden on taxpayers rather than those most responsible for deforestation.
- She points to consistent evidence showing that large corporations in sectors such as palm oil, timber, pulp and paper, and mining are the primary drivers of forest loss, raising questions about why national and regional budgets should pay for restoring landscapes damaged by private industry.
- Greenbury calls for clearer disclosure, stronger accountability mechanisms, and a public–private financing model that requires companies linked to deforestation to bear most of the restoration costs, while ensuring reforms are grounded in credible data and community consent.
- This article is a commentary. The views expressed are those of the author, not necessarily of Mongabay.

Drone-mounted eDNA hints at richness of life in the rainforest canopy (Jan 29 2026)
- Scientists have used a combination of drone technology and environmental DNA analysis to detect animals that live in the rainforest canopy in the Peruvian Amazon.
- Using the technology, researchers were able to draw a contrast between species detected from canopy samples and water samples.
- They found that water samples indicated the presence of more species, while canopy samples detected taxonomic groups not found in water samples, highlighting the need to use both methods complementarily.

Indonesia fast-tracks final permit for Papua rice megaproject without Indigenous consent (Jan 29 2026)
- Indigenous rights activists in Indonesia’s Papua region are condemning the government’s rapid approval of a massive rice plantation, arguing the government fast-tracked a key land permit without proper consultation or consent from Indigenous landowners.
- The activists say the process ignored Indigenous communities’ free, prior and informed consent (FPIC) and reflects a broader pattern under the food estate program that sidelines Indigenous rights and environmental safeguards in the name of national food security.
- Critics warn of widespread deforestation, land dispossession and social conflict, echoing past failures of similar schemes elsewhere in Indonesia.
- The government claims that procedures were followed, but Indigenous representatives and civil society groups say consultations were minimal, protests were ignored and the project amounts to forced land appropriation.

Brazil sets out its strategy for nature (Jan 28 2026)
  Brazil is the world’s most biodiverse country, and the title is not closely contested in absolute numbers: between 10% and 15% of all known species live within its borders. The country contains nearly two-thirds of the Amazon rainforest and supplies about a tenth of the world’s food. That combination of ecological wealth and economic […]

World Bank carbon program risks further infringing upon rights of Indonesian Indigenous community (commentary) (Jan 28 2026)
- The Indigenous Dayak Bahau community of Long Isun has long fought for recognition, land rights and justice in Indonesian Borneo, and while those disputes remain unresolved, a new threat to their sovereignty has appeared: the World Bank’s carbon program.
- The bank did not create the conflict, but by moving forward with a carbon offset project on this land that is still contested, it would risk reinforcing the status quo that enabled logging companies to operate on their territory without genuine consent.
- “A genuine response from the World Bank could set an important precedent: resolving customary land disputes before launching carbon projects,” a new op-ed argues.
- This post is a commentary. The views expressed are those of the authors, not necessarily of Mongabay.

Francis Hallé, the botanist who took a raft into the rainforest canopy (Jan 22 2026)
- The richest part of a tropical rainforest is often the hardest to study: the canopy, where much of its biodiversity lives beyond reach from the ground. Francis Hallé helped change that by finding ways to observe the treetops without cutting them down.
- A French botanist, biologist, and illustrator, he became known for the “canopy raft,” a platform set onto the crowns of trees by a balloon. It turned the upper forest from a place described in theory into one examined up close.
- Hallé was an expert in tropical forest ecology and “the architecture of trees,” a way of identifying trees by how they grow and branch. He paired field science with drawing and plain speech, and he was unsparing about the forces driving deforestation.
- In his later years he pursued a long-term plan to restore a “primeval forest” in Western Europe, left to evolve with minimal human interference over centuries. It was, in his view, a test of whether societies could think beyond the political moment.

Indonesia revokes forest and mine permits over role in deadly Sumatra landslides (Jan 22 2026)
- Indonesia has revoked the permits of 28 companies after a post–Cyclone Senyar audit found environmental violations that authorities say worsened deadly floods and landslides in Sumatra in late 2025, which killed about 1,200 people.
- The revoked permits cover about 1 million hectares of forests and include major players such as pulpwood producer PT Toba Pulp Lestari, marking a shift toward framing permit enforcement as post-disaster accountability.
- Two high-profile projects in the Batang Toru ecosystem were hit: a nearly completed hydropower plant and the Martabe gold mine, both long criticized for operating in landslide-prone terrain that’s the only habitat of the critically endangered Tapanuli orangutan.
- Environmental groups have welcomed the revocations, but warn the move is incomplete, calling for transparency, ecosystem restoration, protection against permit transfers to new operators, and broader action to halt deforestation in vulnerable watersheds.

How US intervention could deepen Venezuela’s environmental crisis (Jan 20 2026)
- Following the removal of Venezuelan President Nicolás Maduro, the U.S. has expressed interest in the country’s oil and minerals. But the current landscape means that a rushed investment could be disastrous for the environment, critics warn.
- Venezuela has an estimated 300 billion barrels of proven crude oil reserves, the largest in the world. But decaying infrastructure and corruption make investment almost impossible, with a high risk of spills inside sensitive ecosystems.
- The country also has massive mineral deposits, many of them in the rainforest and on Indigenous territory. The mines are largely controlled by criminal groups, making U.S. involvement there extremely complicated, critics said.

Too many African plants fall into the IUCN’s ‘not evaluated’ trap (commentary) (Jan 20 2026)
- Of the approximately 350,000 vascular plant species in the world, only about 18% have been assessed by the IUCN Red List, and the situation is starker still if one looks at just tropical African species.
- Further, IUCN’s “not evaluated” category simply means a species has not yet been assessed against Red List criteria, and in practice, African conservationists often meet a more confusing reality: Many species are not on the global Red List at all but are still informally talked about as if they are NE.
- “Here’s a constructive way forward via “Red List + Reality” decision rules…A stronger system could combine global assessments with local intelligence,” a new commentary suggests.
- This article is a commentary. The views expressed are those of the author, not necessarily of Mongabay.

Indonesia sues 6 companies over alleged links to deadly floods & landslides (Jan 19 2026)
- Indonesia’s environment ministry is seeking 4.8 trillion rupiah ($284 million) in environmental damages from six companies it has linked to deadly floods and landslides triggered by Cyclone Senyar in November.
- Following the disasters, the ministry launched an investigation into dozens of companies in the region; the findings determined six companies were responsible for alleged damage to watersheds in North Sumatra.
- The areas affected include Batang Toru, an ecologically fragile ecosystem home to the Tapanuli orangutan, the world’s rarest great ape.

Colombia poised for another drop in deforestation in 2025, data show (Jan 16 2026)
- Deforestation in Colombia appears to have declined in 2025, with notable reductions in several departments like Meta, Caquetá and Guaviare.
- The main drivers of deforestation include the spread of cattle ranching and agriculture, as well as illicit crops like coca, the primary ingredient in cocaine.
- Officials attributed the declining trend to collaboration with Indigenous communities and environmental zoning in rural areas, as well as ecotourism and a program providing financial incentives for communities involved in forest conservation.