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

Can selective logging help the Congo Basin store more carbon? (Jul 2 2026)
- A recent study created a machine-learning program that estimated the amount of carbon dioxide already stored, and sequestered annually, by rainforests in Central Africa’s Congo Basin, the planet’s largest forested carbon sink.
- They found that managed logging concessions, which remove a small number of large trees annually and strictly control other human activities, made up more than half of the net carbon removed by Congo Basin rainforests.
- The authors say these results suggest that expanding logging concessions could help the Congo Basin sequester more carbon while also providing locals with a source of income.
- Other experts, however, argue that addressing local conflicts that lead to illegal forest clearing would be a better way to benefit these forests.

Illegal timber imports from Cambodia, Laos skirt Vietnam safeguards, report reveals (Jul 2 2026)
- A new report from the Environmental Investigation Agency (EIA) reveals persistent trafficking of illegal timber from Cambodia and Laos into Vietnam.
- The illegal cross-border trade fuels deforestation and undermines what the report describes as “significant progress” by Vietnam in recent years to clean up its timber supply chains.
- Multiple mechanisms perpetuate the illicit trade, including the falsification of paperwork, manipulation of harvesting quotas and economic land concessions, and the use of intermediary criminal networks to facilitate the trade, the report says.
- The report calls on Vietnam’s timber authorities to close regulatory gaps in its timber verification system and urges regional governments to improve levels of independent oversight.

Targeted conservation in Brazil could help protect the Amazon’s flying rivers (Jul 2 2026)
- The Amazon’s atmospheric moisture flows known as “flying rivers” provide over 70% of rainfall in parts of southern Peru and northern Bolivia, but they are threatened by deforestation in the Brazilian Amazon.
- According to a new report by the NGO Amazon Conservation, the lack of protections for areas known as undesignated public forests and road development projects pose a deforestation risk that would disrupt the flying rivers during dry and transition seasons.
- Research shows that the Amazon is already experiencing longer dry seasons, which in turn affects the forest’s capacity to recycle moisture for the flying rivers.
- Conservation targeting the forests that are most important for recycling atmospheric moisture could help maintain the flying rivers, the report proposes.

New analysis breaks down 2025 Amazon deforestation, with good news and bad news (Jun 24 2026)
- Amazon Conservation’s Mapping of the Andes Amazon Project (MAAP) published its annual analysis of 2025 forest loss in the Amazon Rainforest, using the data developed by the University of Maryland’s GLAD Lab.
- Last year, there were 736,484 hectares (1,819,891 acres) of deforestation, largely from agriculture, mining, and roads and infrastructure. Nearly 132,000 hectares (326,179 acres) of it was illegal, occurring inside protected areas and Indigenous territories, the analysis found.
- Researchers said this year could be far worse than 2025 as the current El Niño continues to warm up the Pacific Ocean, creating heat waves and dry conditions that lead to more forest fires.

Fire surge in 2025 threatened isolated peoples in Brazil (Jun 24 2026)
- In 2025, fires caused a significant spike in forest loss in Indigenous territories in Brazil that are home to peoples living in voluntary isolation: Alto Turiaçu, Uru-Eu-Wau-Wau, and Apiaká do Pontal e Isolados.
- According to data from Global Forest Watch, fires were responsible for nearly all of the forest loss in each of the territories, destroying mostly primary forest.
- Indigenous leaders told Mongabay that fires are a threat to their way of life, including those living in voluntary isolation, negatively impacting health, vegetation, biodiversity, and food security.
- A climate expert warns the upcoming El Niño, predicted to be stronger than the 2023-2024 event, will likely lead to warmer temperatures and drier conditions across the Amazon Basin, making it more prone to fires.

Global pressure on ayahuasca threatens Amazonian plants and knowledge systems (Jun 23 2026)
- The rising global popularity of ayahuasca, driven by religious, therapeutic, and tourism purposes, has increased pressure on the Amazonian plant species used in its preparation, with reports of growing scarcity in some parts of the rainforest.
- The beverage’s distribution chain connects the forest to international markets through opaque flows that often border on illegality, in a scenario of regulatory gaps and lack of effective oversight.
- Researchers warn about the lack of basic data on the distribution, abundance, and exploitation of these plants, which makes it difficult to create management strategies and increases the risk of environmental degradation.
- Indigenous leaders also denounce the appropriation of traditional knowledge systems and call for global responses, such as the World Ayahuasca Forum, to expand their participation in decisions about the use of the beverage.

Old fire hoses become lifelines for Malaysia’s endangered langurs (Jun 23 2026)
On Malaysia’s Penang Island, conservationist Yap Jo Leen is turning old fire hoses into lifesaving bridges that help endangered monkeys cross busy roads in residential areas. The idea took root after she witnessed a female dusky langur and her infant get struck by a vehicle in 2016, Yap told Mongabay’s Phil Jacobson and AFP’s Isabelle […]

Pulp and paper giant APRIL’s supplier choices put FSC remedy process to the test (Jun 23 2026)
- APRIL’s decision to lower its deforestation cutoff date and source wood from two companies associated with extensive recent forest loss in Indonesia is drawing fresh scrutiny of its efforts to re-enter the Forest Stewardship Council (FSC).
- FSC told Mongabay it is reviewing APRIL’s updated sourcing policies and said it was “concerned” that such an analysis had become necessary.
- Environmental groups say accepting suppliers linked to extensive recent deforestation undermines the spirit of FSC’s remedy process, which is intended to encourage companies to repair past harms before regaining acceptance.
- APRIL says the changes align with evolving global standards and could help improve sustainability practices across Indonesia’s forestry sector, but critics warn the move risks eroding trust in both APRIL and FSC.

World Rainforest Day: Deforestation must be nearly halved to meet 2030 target (Jun 22 2026)
Every year, June 22 marks World Rainforest Day, an awareness day launched by Rainforest Partnership in 2017 to advocate for the immediate protection and restoration of the world’s tropical forests. These ecosystems support at least half of all known plant and animal species. They also regulate rainfall and stabilize the global climate. In 2025, less […]

South America’s farms depend, in part, on a healthy Amazon (Jun 22 2026)
- The Amazon is not only a carbon store; it is also a major source of atmospheric moisture that helps sustain rainfall across much of South America.
- A new Nature study finds that deforestation lowers the warming threshold at which large parts of the Amazon could lose stability.
- Recent droughts, El Niño conditions, and fire risk show why degraded forests are less able to withstand climate stress and recover afterward.
- Protecting intact forests, restoring degraded areas, and reducing fire are increasingly important for climate resilience, biodiversity, and South America’s food system.

Death and exile: A war plagues Indigenous Jiw and Nukak in the Colombian Amazon (Jun 19 2026)
- By late May, at least 48 people were killed in rural areas of Colombia following clashes between the FARC guerrilla dissident groups controlled by the aliases “Calarcá” and “Iván Mordisco.”
- Conflicts have displaced 10 Indigenous Jiw families from the municipality of Mapiripán, Meta department. They had to reach the urban area of San José del Guaviare for protection.
- The clashes occurred near the Tomachipán-Cumare road, an illegal trail used by dissident armed cells as a strategic corridor to mobilize and transport drug trafficking supplies in the Guaviare department.
- Experts warn that controlling this disputed area is important for armed groups, as it means dominating strategic zones in the department and also being closer to the Venezuelan border.

Suriname will not be saved by soybeans (commentary) (Jun 19 2026)
- Suriname should be wary of promises that foreign agribusiness will modernize agriculture, create jobs, and bring broad prosperity, argues Mark Plotkin, ethnobotanist and President of The Amazon Conservation Team.
- Across tropical America, this model has too often proved a costly folly: forests are cleared, rivers are polluted, and local communities are left with fewer resources while wealth flows elsewhere.
- Rather than expanding export-oriented soy and cattle production, Suriname should strengthen food security, support local producers, protect rivers and forests, and seek the input of the communities most affected.
- This article is a commentary. The views expressed are those of the author, not necessarily of Mongabay.

In search of the ‘rare and beautiful’ in an Ivorian rainforest (Jun 18 2026)
- In late May, Mongabay visited the Taï National Park in southwestern Cote d’Ivoire.
- The park protects the largest remnant of Upper Guinean forests in West Africa, which is itself home to unique animals.
- One of these is the white-necked picathartes, a bird that builds its mud-cup nests on rock walls deep inside the rainforest.
- A Mongabay correspondent accompanied a member of the Ivorian Office of Parks and Reserves to visit a rare nesting site in the hope of spotting its elusive occupants.

Pulp and paper giant APRIL adds major deforesters as suppliers after revising sustainability policy (Jun 18 2026)
- The changes include lowering its deforestation cutoff date to the end of 2020, which allows APRIL to source wood from two companies responsible for some of Indonesia’s largest recent forest losses.
- APRIL says the move aligns with global standards and helps address fibre shortages caused by permit revocations affecting 15% of its wood supply.
- But critics say the changes weaken a longstanding no-deforestation safeguard and have questioned why APRIL selected these two suppliers among Indonesia’s many fibre producers.
- APRIL says its new suppliers will undergo satellite monitoring, compartment-level traceability and annual independent audits, but critics say transparency concerns remain.

Illegal miners adapt their strategies in Yanomami Amazon territory (Jun 17 2026)
- Illegal miners are adapting their tactics in the Yanomami Indigenous Territory in Brazil’s Amazonas and Roraima states to evade efforts in the last few years to remove them, found researchers.
- Miners are fragmenting into smaller groups instead of concentrating near airstrips, going deeper into the middle of the Amazon forest, moving to specific border areas with Venezuela and paying high prices to continue their activities.
- Illegal mining is significantly down in the territory due to the government operation, said Indigenous people and authorities, though concerns remain for the health of isolated Indigenous people.
- Brazil’s government says it is in the phase of “scavenging the territory” to remove miners deep in the forest which are unable to be detected by satellite imagery and require long walks into the Amazon.