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

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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 thesecond and third largest areasof tropical rainforest. Rainforests also exist on some the Caribbean islands, in Central America, in India, on scattered islands in the South Pacific, inMadagascar, 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.

雷竞技体育下载热带雨林提供重要的生态服务,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,lol赔率雷电竞 ,New Guinea,Sulawesi,Forests in Brazil, etc), appendices, and other resources.

There is also a version of the site geared toward younger readers atkids.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 estimated229-247 billion tons of carbon) through photosynthesis;influencing precipitation patterns and weather;moderating flood and drought cycles; andfacilitating 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

雷竞技官网欢迎热带雨林diver雷竞技体育下载sit最大的支持y 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 thatforests 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.

但是战斗还远未结束。日益增长的人口n 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

Mining may contribute to deforestation more than previously thought, report says(Apr 20 2023)
- A new report from WWF says there are still considerable discrepancies about how mining-related deforestation is occurring, and why.
- Most mining-related deforestation is driven by gold and coal. Other minerals like bauxite, iron ore and copper are also major drivers.
- Mining clears the forest to dig excavation pits and access roads. But the report stressed that more attention needs to be paid to the indirect impacts of mining, such as the construction of infrastructure for energy, processing and storage, as well as local economic development that leads to in-migration and settlements.

EU parliament passes historic law forcing companies to track deforestation(Apr 20 2023)
- A law passed by the European Parliament requires companies working in cattle, cocoa, coffee, palm oil, rubber, soy and wood to demonstrate their products aren’t sourced to deforested land or land with forest degradation, or else risk heavy fines.
- Companies will have to submit “due diligence” reports showing they took proper steps to verify the origins of their products while also complying with countries’ local regulations on human rights and impacts on Indigenous people.
- Critics say the legislation may still lack the teeth to prevent deforestation, especially if political pressure from traders forces EU countries to overlook their noncompliance with the new regulations.

Study attempts to foresee the future of Amazonian mammals if the rainforest turns into savanna(Apr 18 2023)
- What could become of the some 300 species of mammals living in Amazonia if deforestation and global warming lead to the savannization of the rainforest?
- Researchers analyzed images from 400 photo traps placed in four natural enclaves of the Cerrado biome in southern Amazonia to find some answers; analysis of the photos showed that, when given the choice between preserved Amazon Rainforest and preserved Cerrado, most species chose the rainforest.
- Another study analyzed rainforests around the world, finding that savannization may happen sooner than expected; in Amazonia, this occurrence will mean reduced population and range for mammals like jaguars, tapirs and deer.

Return of the GEDI: Space-based, forest carbon-mapping laser array saved(Apr 17 2023)
- Since 2018, the GEDI mission has been firing lasers from the International Space Station to measure aboveground biomass on Earth.
- The information gleaned from it has been crucial for scientists to understand how deforestation contributes to worsening climate change.
- The mission was supposed to be decommissioned earlier this year, with the lasers fated to be jettisoned from the ISS and burned up in the atmosphere.
- However, NASA made a last-minute decision to extend the mission after a push from the scientists involved in it: the GEDI equipment will be put into storage for 18 months, then reinstated to resume operations for as long as the ISS continues to run.

Power of traditional beliefs lies at the heart of an anti-mine campaign in PNG(Apr 17 2023)
- A newly published study published explores the important role that traditional Papua New Guinean beliefs play in an ongoing campaign against a copper and gold mine on a tributary of the Sepik River.
- Critics say the controversial mine project could potentially pollute one of the most biologically and culturally diverse places on Earth, while supporters point to potential development benefits.
- The Save the Sepik campaign against the mine harnesses traditional governance structures and beliefs, acknowledging the spirits of ancestors, the land and river, in a declaration that has become a rallying cry for the campaign.
- The campaign’s success so far — licenses haven’t been awarded for the mine project — is part of a growing global movement that acknowledges the close relationship some communities have with a sentient environment.

World’s newest great ape faces habitat loss, multiple threats: Will it survive?(Apr 14 2023)
- Scientists designated the Tapanuli orangutan (Pongo tapanuliensis) as a new species in 2017, and it was immediately noted as being the rarest and most threatened great ape with fewer than 800 individuals in western Indonesia.
- The IUCN estimated the apes’ population fell by 83% in recent decades, and the species continues to face grave threats due to habitat loss, a gold mine, a hydroelectric plant and the expansion of croplands.
- While some conservation efforts offer hope, researchers say a coordinated plan is needed to ensure the species survives.

‘They have conned us out of our lands’: Conflict brews in Peru as Mennonite settlers clear forest(Apr 14 2023)
- Mennonite groups began arriving in the Peruvian town of the district of Padre Márquez in Peru’s Loreto region in 2020.
- Settling near the town of Tiruntán, one Mennonite colony has cleared hundreds of hectares of old growth rainforest since 2021.
- Tiruntán community members claim they were given plots of public land by the town mayor, which were then sold to “the Mennonites, some Chinese business owners, and a logging company” in an effort to get around regulations that prohibit the clearing of forested land.
- Similar situations are playing out in other parts of Peru, as well as elsewhere in South America.

Mexico kills climate change fund, casting doubt on future environmental spending(Apr 13 2023)
- Mexico’s Supreme Court ruled against an injunction that was filed to revive the country’s Climate Change Fund, which was designed to channel public and private funding into actions to fight climate change.
——该基金帮助支持当地和国家按工程cts for reducing deforestation rates, restoring degraded landscapes, developing sustainable agricultural practices and investing in renewable energy, among other things.
- Without the fund, it’s unclear how much of Mexico’s national budget will be allocated to climate-related issues, since spending is discretionary.

International mercury regulations fail to protect the environment, public health: study(Apr 13 2023)
- Mercury is one of the most concerning chemicals affecting public health and the environment. The chemical can enter local watersheds and poison flora and fauna, while leaving humans with memory loss, seizures, vomiting and lung damage, among other problems.
- A recent study found that data collection for mercury use is so inconsistent that it can’t be relied on for understanding trends in artisanal and small-scale mining.
- The UN Minamata Convention on Mercury, which went into effect in 2017, requires countries to collect data on mercury use but doesn’t say how that data should be collected, resulting in inconsistencies between countries.

Forests & finance: Protection and restoration in Cameroon and Senegal, fire threat in Angola(Apr 13 2023)
- A new project aims to reform Cameroon’s domestic timber market and reduce unregulated felling of trees.
- Scientists fear pockets of species-rich afromontane forest in Angola’s Namba Mountains will be lost if uncontrolled fires continue.
- A Senegalese association is protecting and restoring southern Senegal’s tree cover by establishing community forests.
- Forests & Finance is Mongabay’s bi-weekly bulletin of briefs about Africa’s forests.

厄瓜多尔禁止天然气燃除在一年前。为什么it still happening?(Apr 12 2023)
- In September 2021, a provincial court gave oil companies 18 months to eliminate gas flaring in the Amazon because of its role in spiking cancer rates among local residents.
- That deadline expired in March, but today oil companies continue to use gas flares more than ever. Before the court ruling, there were an estimated 447 gas flares in the country. Today, there are 475.
- Activists say they still have some legal avenues for pressuring the government to enforce the ban, including impeaching ministers that fail to comply with the court’s order.

Report: Indonesia’s ‘food estate’ program repeating failures of past projects(Apr 11 2023)
- Some of the large-scale food plantations established by the Indonesian government under a “food estate” program have reportedly been abandoned.
- A field investigation in 2022 and 2023 found wild shrubs and abandoned excavators on plots of lands that had been cleared for cassava and rice in Central Kalimantan province.
- Activists say the program’s failings were apparent from the start, with a lack of proper impact assessments carried out prior to selecting sites and clearing forests for crops ill-suited to the soil.
- The program’s trajectory mirrors that of the Mega Rice Project from the mid-1990s, which failed spectacularly to boost yields, and left in its wake widespread destruction of carbon-rich peatlands.

Flawed count puts ‘glorified’ Javan rhinos on path to extinction, report says(Apr 11 2023)
- Javan rhinos, a critically endangered species found only in a single park in Indonesia, may be on a population decline that could see the species go extinct within a decade, a new report warns.
- The report highlights questionable practices in the Indonesian government’s official population count, which has shown a steady increase in rhino numbers since 2011.
- Notably, the official count includes rhinos that haven’t been spotted or recorded on camera traps in years; at least three of these animals are known to have died since 2019.
- The report, by environmental NGO Auriga Nusantara, also highlights an increase in reported poaching activity in Ujung Kulon National Park, and a general lack of official transparency that’s common to conservation programs for other iconic species such as Sumatran rhinos and orangutans.

To build its ‘green’ capital city, Indonesia runs a road through a biodiverse forest(Apr 10 2023)
- A new toll road in Indonesia’s East Kalimantan province is under construction to improve access to the interior of Borneo, including to the nation’s new capital city, Nusantara.
- Construction of the road, however, poses immediate environmental risks, as the route cuts through a forested area with high conservation value that connects the Sungai Wain protected forest, coastal mangroves, and Balikpapan Bay.
- Prior to road construction, the integrated forest and coastal ecosystem supported populations of orangutans, sun bears, proboscis monkeys and Irrawaddy dolphins.
- Conservationists say the construction of this toll road belies the Indonesian government’s claims that the development of the new capital will be green and sustainable.

Indonesian Indigenous group AMAN wins Skoll Award for defending land rights(Apr 10 2023)
- Indonesia’s main Indigenous alliance, AMAN, has won a 2023 Skoll Award for Social Innovation for its work in advocating for Indigenous rights.
- The group’s work includes mapping Indigenous territories and lobbying for legislation that supports and protects Indigenous rights to their lands.
——阿曼说这个奖项燃料其精神工作前夕n harder, as there’s still much work to be done, with many Indigenous communities still lacking legal recognition of their land rights and an Indigenous rights bill being stalled in Parliament.
- Four other organizations have won this year’s award, including Conexsus, a Brazilian NGO that promotes sustainable forest management and forest-based economies by centering community-led efforts and Indigenous ecological knowledge.