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

A ‘lost’ Philippine pigeon reappears after 20 years — but its forest is disappearing (Sep 3 2026)
- Philippine conservation nonprofit CCIPH and Indigenous Iraya Mangyan forest patrollers documented a Mindoro bleeding-heart pigeon, providing the first confirmed image of the critically endangered species in two decades.
- Two independent ornithologists confirmed the identification based on the bird’s orange-red breast marking, iridescent green plumage, and other distinctive features.
- The image was recorded at an elevation above 900 meters (about 3,000 feet), higher than the species’ typical lowland range of 400-88 m (1,300-2,600 ft).
- Experts called for expanded camera-trap surveys, a comprehensive population. assessment, stronger habitat protection, and measures to address logging, poaching and accidental trapping.

Invaders storm Indigenous Amazon land, threatening isolated people (Sep 2 2026)
- About 200 people have invaded the Ituna/Itatá Indigenous Land in Brazil’s Pará state since August 13, breaking through Brazil’s Indigenous Affairs Agency (Funai) gates, removing signs and establishing camps.
- The invasion followed the creation of the Bacajaí Environmental Protection Area that completely overlaps with the federally protected Indigenous Land — creating legal confusion which authorities say has been exploited by individuals who wish to occupy the area.
- Federal authorities have warned of an imminent risk of confrontation and potentially genocide against Indigenous people living in voluntary isolation and have called for the urgent deployment of the National Force and Federal Police.
- On August 26, a federal court ordered the Union and Funai to send teams from the Public Security Force within 48 hours to contain the invasion but the deadline has passed and the teams have not yet arrived.

Logging operations uncovered at Cambodian senator’s dam in the Cardamoms (Sep 2 2026)
- Construction of the Stung Russei Chrum Kandal hydropower dam inside Phnom Kravanh National Park, one of Cambodia’s largest protected rainforests, began in 2023.
- Satellite imagery suggests forest clearance and large-scale logging are happening beyond the authorized construction sites.
- Experts say the images reflect a wider pattern in Cambodia of exploitation of licenses for dam development to further illegal logging operations.

Scientists use mining data to build malaria alert system in the Amazon (Sep 1 2026)
- Researchers have found a direct link between illegal mining, miners’ routes, and malaria cases in the Yanomami Indigenous Territory in Brazil.
- Now, they’re working on an alert system that will rely on mining data to warn local health agents about the risk of a malaria outbreak.
- The number of malaria cases dropped sharply after authorities expelled illegal miners from the Yanomami land, but Indigenous people worry the potential return of a right-wing government after October’s election could revive the humanitarian crisis.

For 50 years, Philip Fearnside has calculated the costs of losing the Amazon (Aug 31 2026)
- Philip Fearnside has spent 50 years studying the practical limits of Amazon development, beginning with the agricultural settlements built along Brazil’s Trans-Amazonian Highway. His work repeatedly asked who benefits from projects and who bears their longer-term costs.
- He produced influential research on deforestation, forest carbon, tropical dams, and the wider effects of roads, often challenging official assumptions about emissions and economic viability. He later contributed to the IPCC’s work on climate change.
- Fearnside has paired research with public engagement, publishing in Portuguese, writing for Amazônia Real and Mongabay, speaking to journalists, and testifying on projects including the BR-319 highway. That role has also made him a target of hostility, including at a 2021 public hearing where his microphone was cut.
- Former students and colleagues credit him with generous, exacting mentorship and an unusual command of the scientific literature. At a recent tribute at Brazil’s National Institute for Amazonian Research, he rejected any suggestion of a farewell: he intends to keep working.

‘They will do it legally or illegally’: Interview with James Giahyue on Liberia’s cocoa boom (Aug 26 2026)
- In July, Mongabay published a feature investigation and video report about deforestation in southeastern Liberia dude to cacao cultivation.
- The remote region contains some of West Africa’s last intact rainforests, many of which are under threat due to the emergence of the cacao industry there.
- Liberian journalist James Giahyue told Mongabay that poverty and the involvement of local politicians are helping to drive deforestation there.

Ashéninka leader reportedly killed while patrolling Indigenous territory is found alive (Aug 26 2026)
- Ashéninka leader Américo Pascuala Tumisha was reportedly shot and killed Aug. 23 while patrolling the territory of the Onconashari Indigenous community in Peru’s Ucayali region. He was subsequently found to be alive.
- Onconashari residents have reported incursions linked to unauthorized copaiba extraction since at least 2020, including threats against community members who objected.
- The community has a long history of territorial monitoring and in 2025 received formal government recognition for its Forest Surveillance and Control Committee, which Pascuala later coordinated.
- Global Witness has documented more than 60 killings and disappearances of environmental and land defenders in Peru since 2012; AIDESEP says at least 38 Indigenous defenders were killed in the Peruvian Amazon between 2014 and 2026.

Can REDD+ deliver for Philippines’ Iraya Mangyan? (Aug 26 2026)
- The Mindoro Forest and Biodiversity Conservation Programme combines Indigenous forest patrols, ancestral-domain support, carbon monitoring and livelihood projects to protect more than 40,000 hectares (nearly 99,000 acres) of Iraya Mangyan forest.
- Indigenous patrollers and local officials say the program has already strengthened monitoring and helped reduce timber poaching and small-scale mining, while surveys have documented hundreds of plant and animal species across the project area.
- Community nurseries and paid conservation roles are creating early livelihood opportunities, but many benefits remain limited and uneven while the project awaits verification, a finalized benefit-sharing agreement and carbon revenue expected no earlier than around 2029.
- Whether the program can deliver lasting benefits will depend on finalizing a transparent revenue-sharing agreement, sustaining patrols and livelihoods during the long wait for carbon income, and ensuring the Iraya retain a meaningful role in decisions over their forests.

US proposes rescinding Roadless Rule protections for national forests (Aug 25 2026)
Aug. 25 is a National Day of Action to support U.S. national parks and public lands. One focus of the event is the U.S. government’s intention to rescind a rule that bans road construction and industrial logging across more than 23 million hectares (57 million acres) of national forest land. The 2001 Roadless Rule, has […]

Why carbon markets alone won’t save Southeast Asia’s concessions forests (Aug 19 2026)
New research suggests a “massive and untapped” opportunity for conservation within commercial concessions in Southeast Asia, reports Mongabay’s Carolyn Cowan. Using satellite data, researchers identified roughly 42 million hectares (104 million acres) of intact forest still standing inside logging, timber, rubber and oil palm concessions across Cambodia, Indonesia, Malaysia and Myanmar. The study suggests that […]

Mariano Cenamo, advocate for a sustainable Amazon bioeconomy, has died, aged 46 (Aug 10 2026)
- Mariano Cenamo spent more than two decades trying to make standing forests economically competitive with cattle ranching and other activities driving Amazon deforestation, helping establish Idesam and later backing a new generation of sustainable businesses.
- His work evolved from early efforts on forest carbon and REDD+ to agroforestry, bioeconomy ventures, investment, and entrepreneurship, always centered on creating practical sources of income for people living in the Amazon.
- Drawing on Cenamo’s own writings and interviews, as well as Vanessa Adachi’s posthumous portrait in Reset, this obituary explores the ideas, motivations, and personal style behind one of the Amazon’s most influential environmental entrepreneurs.
- Cenamo died on July 10 after several years with cancer. He was 46.

Amazon deforestation alerts fall to lowest level since 2013, Brazilian data show (Aug 9 2026)
- INPE’s DETER system recorded 2,874 sq km of Amazon deforestation alerts from August 2025 through July 2026, down 36% from the previous year and 55.6% below the preceding 10-year average.
- The total is the lowest since 2013 when earlier DETER data are included. If the trend is confirmed by the higher-resolution PRODES system, Brazil could record its lowest official Amazon deforestation rate since monitoring began in 1988.
- The decline has coincided with stronger environmental enforcement under President Luiz Inácio Lula da Silva. Alerts also fell in the Cerrado, Caatinga, Atlantic Forest, and Pampa, with the Cerrado reaching a five-year low.
- Despite the decline in clear-cutting, the Amazon remains vulnerable to logging, drought, forest degradation, and fire, which can cause substantial ecological damage without immediately appearing in deforestation statistics.

Suriname moves to evict Mennonites and illegal Amazon settlers (Aug 7 2026)
- The government in Suriname has created a task force to crack down on land developers who illegally clear the Amazon Rainforest for agriculture and cattle ranching.
- Many areas under development are connected to Mennonites who migrated to the country from other parts of the region to help meet a domestic demand for food production.
- Conservationists warn that the group’s history of industrial-scale clearing and unauthorized ranching in other nations puts the rainforest at risk.
- Some Mennonites have received a deurwaardersexploot, a written notice delivered by a bailiff to appear in court, according to Suriname President Jennifer Geerlings-Simons.

Tree cover is not the same as ecological recovery (Aug 7 2026)
Founder’s Briefs: An occasional series where Mongabay founder Rhett Ayers Butler shares analysis, perspectives and story summaries. A harpy eagle needs large trees for nesting and enough surrounding forest for its young to learn to fly. The Amazon also depends on the eagle. By controlling populations of monkeys, sloths, and other animals, the predator helps […]

On the frontlines of conservation in Sumatra: Rangers safeguard Batutegi forest (Aug 7 2026)
- In southern Sumatra, a small team of forest rangers is racing to protect Batutegi forest, an important watershed and refuge for endangered wildlife such as tigers and slow lorises.
- Batutegi faces persistent pressures from forest encroachment and the need to balance conservation with local livelihoods.
- Experts say protecting Batutegi will require sustained collaboration with local communities, alongside long-term conservation and forest management efforts.