This is a rare occurrence, however, and is generally not considered a major threat to species in the rainforests. More than 35% of the world’s mangroves are already gone. These invaders cause massive disruptions in ecosystem function, reducing biodiversity, and degrade ecosystem health in our nation’s forests, prairies, mountains, wetlands, rivers, and oceans. Over the past thirty years or so, Sri Lanka’s coastal zone has witnessed a rapid conversion of it’s mangroves for various uses such as aquaculture and housing development. A forest ecosystem includes all of the organisms in the forest environment as well as the chemical and physical elements of that environment that influence them. The war is playing a major role in destroying the biodiversity of Pakistan. Forests have long been threatened by a variety of destructive agents. Tropical deforestation is a potentially catastrophic problem because of the vital ecological services at risk, the high rate of tropical deforestation, and its growing contribution to global warming. Temperate deciduous forests They are found in areas with moderate temperatures. IUCN’s forest work tackles the role of trees and forests in building resilience to climate change in several ways: Combatting deforestation and forest degradation in areas of high biodiversity and cultural significance, such as primary forests and World Heritage sites. Unsustainable cutting and burning of forests, along with diseases and insects, are the chief threats to forest ecosystems. This makes the plants grow well, but is lethal to any animal that happens to wander in. Threats to Pakistan Ecosystem: Pakistan has one of the most diverse landscapes on Earth, from 0 m at sea level to 8,611 m at the peak of K2. Unsustainable cutting and burning of forests, along with diseases and insects, are the chief threats to forest ecosystems. – Habitat fragmentation. Climate change is one of the greatest challenges currently facing humankind. Today, the frequency, intensity and timing of fire events, hurricanes, droughts, ice storms and insect outbreaks are shifting as a result of human activities and global climate change, making forest ecosystems even more prone to damage. Forest Ecosystem.ppt - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. This issue of Unasylva examines the threats posed by a number … Forest ecology is the study of such ecosystems, which tend to be both … Terrestrial ecosystems, including forests, grasslands, and savannas, are facing myriad threats globally, resulting in high rates of habitat loss and degradation (CBD 2010a). Tropical deforestation is a potentially catastrophic problem because of the vital … This helps conserve the benefits that people and societies get from forests, including forest carbon stocks and … Forest ecosystems provide ecological services far greater in value than the value of raw materials obtained from forests. Drought - Droughts initially weaken the canopy of the rainforest by reducing local humidity and rainfall. What Are the Major Threats to Forest Ecosystems? have major trees including broad leaf deciduous trees like oak, hickory and animals like deer, fox, bear, etc., Characteristics of forest ecosystems 1. Unsustainable logging is a major threat to forest ecosystems • The first step in harvesting trees is to build roads for access and timber removal, but they can cause the following problems: – Increased erosion and sediment runoff into waterways. Mangrove Forests: Threats Mangrove forests are one of the world’s most threatened tropical ecosystems. 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