RAINFOREST INFORMATION

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

Sections:

What is a rainforest?

Characteristics of a rainforest

Rainforest biodiversity

Rainforest canopy

Rainforest floor

Rainforest waters

Rainforest peoples

Deforestation

Consequences of deforestation

How to save the rainforest

The Amazon

The Congo

Rainforest Facts

For kids

Rainforest photos

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

Borneo project hopes to prove that forests and oil palms can coexist (May 15 2025)
- Monoculture palm oil production has come at the cost of rainforest habitat, particularly in Malaysia and Indonesia.
- Researchers are conducting experimental trials in Malaysian Borneo to see if native trees can be planted in oil palm plantations without significantly reducing palm oil yields.
- While still in the initial stages, the experiment is so far showing there are no detrimental effects to oil palm growth.
- In fact, interplanting with native forest trees may benefit oil palm, with the researchers finding oil palm trees had more leaf growth in agroforestry plots than in monoculture ones.

Lack of funds, cattle ranchers challenge Brazil’s sustainable farmers (May 13 2025)
In 2005, the Brazilian government created PDS Brasília, a sustainable settlement in the state of Pará. The settlement was designed to encourage 500 families to practice small-scale family farming, while also collectively using a standing forest to harvest its fruits and nuts, Mongabay’s Fernanda Wenzel reported in March. The 19,800-hectare (49,000-acre) settlement was created following the […]

Attacks on Cambodian environmental journalist continue to pile up (May 12 2025)
- Cambodian environmental journalist Ouk Mao was attacked by a group of men, apparently including a former police officer, while documenting illegal logging in Prey Lang Wildlife Sanctuary, following a pattern of escalating harassment and threats.
- Mao has faced numerous legal challenges, including defamation and incitement charges, that he claims are retaliation for exposing environmental crimes, with local officials allegedly trying to silence his work.
- Cambodia’s crackdown on critical journalism has intensified, with Mao’s case reflecting a broader decline in press freedom, as highlighted by the country’s plummeting rank in the 2025 Reporters Without Borders Press Freedoms Index.
- Advocacy groups like the Committee to Protect Journalists and Cambodian Journalists Alliance Association warn that the lack of accountability for attacks on journalists has created a dangerous environment for those reporting on illegal logging and other sensitive issues.

In Côte d’Ivoire a changing climate hits farmers and markets alike (May 9 2025)
- Towns across Côte d’Ivoire are facing shortages of staple foods like plantain and tomatoes, due to erratic weather.
- Prolonged drought and heavy rains have affected growers in towns like Soubré, who are struggling to maintain sufficient production to supply local markets.
- An expert says adapting to the new climate reality is key, and proposes training farmers in new agricultural techniques and improving natural resource management.

Warming climate is already too hot to handle for 2% of amphibians, study shows (May 8 2025)
- Researchers found 2% of amphibian species are already experiencing temperatures beyond their physiological limits, potentially increasing to 7.5% with continued climate warming.
- The study revealed an unexpected pattern where tropical species in the Southern Hemisphere face greater heat risk, while in the Northern Hemisphere, species at higher latitudes are more vulnerable.
- Habitat plays a crucial role in vulnerability, with aquatic species facing the lowest risk, tree-dwelling species at moderate risk, and ground-dwelling species experiencing the highest risk of overheating.
- Conservation efforts should focus on maintaining water bodies and shaded areas, as these serve as critical thermal refuges that can help amphibians survive extreme heat events.

Seeds rescued from India’s coffee farms could help forest restoration (May 8 2025)
Coffee agroforests in India’s Western Ghats mountains, where coffee shrubs are grown under the shade of trees, could be a good source of seeds for forest restoration efforts, according to a recent study, reports Mongabay India’s Simrin Sirur. Much of India’s coffee is grown in the rain-rich Western Ghats, a global biodiversity hotspot. Coffee farms […]

Alwyn Gentry died young, but left a forest’s worth of ideas behind (May 7 2025)
Founder’s Briefs: An occasional series where Mongabay founder Rhett Ayers Butler shares analysis, perspectives and story summaries. Long before “biodiversity hotspot” became a conservation cliché, Alwyn Howard Gentry was painstakingly mapping them — one vine, one tree, one tenth-hectare transect at a time. His early death in 1993 at age 48, in a plane crash […]

How Mongabay Indonesia grew into a trusted environmental voice: Interview with Ridzki Sigit  (May 6 2025)
- This series features interviews with Mongabay leaders about their personal and professional journeys, beginning with Ridzki Sigit, Program Director of Mongabay Indonesia.
- Ridzki joined Mongabay when it was a novel concept in Indonesia, helping transform it into one of the country’s most influential environmental news platforms since its 2012 launch.
- With a background in forestry and documentary filmmaking, Ridzki brought storytelling and environmental expertise to Mongabay, leading investigations that have influenced policy and spotlighted urgent conservation issues.
- He emphasizes creativity, collaboration, and local empowerment, viewing environmental journalism as both a mission and legacy to protect Indonesia’s biodiversity for future generations.

Indonesia’s deforestation claims under scrutiny over ‘cherry-picked’ data (May 6 2025)
- Researchers say Indonesia’s claim of a 90% deforestation drop over the past decade is misleading due to cherry-picked data and an extreme baseline year.
- The actual decline is closer to 50-69%, driven by earlier policies and reduced forest availability in many regions.
- Deforestation is rising again, especially in Papua and Sulawesi, fueled by palm oil, pulpwood, and mining expansion.
- Civil society groups are crucial in tracking and exposing forest loss amid conflicting government policies and rising environmental threats.

International Leopard Day celebrates the resilient, yet often-overlooked, big cat (May 2 2025)
Shy, solitary leopards might lose out to tigers and lions in the game of charisma, but the rosette-patterned big cats are incredibly adaptable — they can survive in the densest of cities just as easily as in forests, grasslands and high mountains. While highly adaptable, leopards (Panthera pardus), listed as vulnerable on the IUCN Red […]

New report reinforces critical role of Amazonian protected areas in climate fight (May 1 2025)
- A new report has found that protected areas and Indigenous territories in the Amazon store more aboveground carbon than the rest of the rainforest.
- Protected areas and Indigenous territories were also found to serve as significant carbon sinks between 2013 and 2022, absorbing 257 million metric tons of carbon dioxide.
- Protected areas in Colombia, Brazil, Suriname and French Guiana were found to be significant carbon sinks.
- The report underscores the need to protect these areas that aren’t currently threatened by deforestation as they play a critical role in offsetting emissions from other parts of the forest.

Gold rush moves closer to Amazon’s second-tallest tree (May 1 2025)
Illegal gold miners are now operating very close to the second-tallest tree in the Amazon Rainforest, Mongabay’s Fernanda Wenzel reported in April. Six giant trees, including a red angelim (Dinizia excelsa) that stands 85 meters (279 feet) tall, are found inside the Iratapuru River Sustainable Development Reserve in Brazil’s Amapá state. Despite the area’s protected status, […]

Abel Rodríguez, artist who drew a vanishing forest from memory, died April 9, age unknown (May 1 2025)
Founder’s Briefs: An occasional series where Mongabay founder Rhett Ayers Butler shares analysis, perspectives and story summaries. In a modest home on the edge of Bogotá, a forest lived in exile. Redrawn leaf by leaf from memory with ink and conviction, it existed not on maps or in satellite imagery, but on sheets of paper, […]

Study suggests there are more jaguars in the Amazon than previously thought (May 1 2025)
Jaguar numbers in the Amazon Rainforest may be higher than previous estimates, according to a new large-scale study that offers the most comprehensive population snapshot to date. Using camera-trap images of jaguars (Panthera onca) across the Brazilian, Colombian, Peruvian and Ecuadorian Amazon, researchers calculated an average density of three jaguars per 100 square kilometers (about […]

Indigenous stewardship plays a key role in protecting imperiled primates (Apr 30 2025)
Founder’s Briefs: An occasional series where Mongabay founder Rhett Ayers Butler shares analysis, perspectives and story summaries. While most people are familiar with monkeys, the great apes, and possibly lemurs, fewer may realize that there are more than 500 known species of primates, making them one of the most diverse groups of mammals. These species […]