Biodiversity Hotspots
Introduction
Biodiversity hotspots are regions on Earth that are exceptionally rich in plant and animal life, particularly species that are found nowhere else, and are also facing extreme threats due to habitat destruction. These are the most biologically rich yet highly endangered terrestrial ecosystems.
Criteria for Biodiversity Hotspot Designation
- To be classified as a biodiversity hotspot, a region must fulfill two specific criteria. First, it must contain at least 1,500 species of vascular plants that are endemic, meaning they are found nowhere else on Earth. Second, it must have lost at least 70 percent of its original native vegetation. These criteria ensure that hotspots are not only rich in unique biodiversity but are also areas where urgent conservation efforts are needed.
Global Distribution and Examples
- Currently, there are 36 biodiversity hotspots recognized around the world. Some of the most remarkable examples include the Tropical Andes in South America and the Sundaland region in Southeast Asia, each of which hosts approximately 15,000 endemic plant species. In some hotspots, the loss of native vegetation has reached as high as 95 percent, making their conservation critically important.
Conservation Focus and the Role of CEPF
- The Critical Ecosystem Partnership Fund (CEPF) directs its conservation efforts exclusively toward biodiversity hotspots. Given the global scale of species extinction and the limited availability of conservation funds, this focused approach ensures that investments have the greatest possible impact. Hotspots contain a vast number of irreplaceable species and are under multiple, urgent threats. CEPF works with civil society and local communities within these regions to support sustainable conservation strategies.
Human Presence in Biodiversity Hotspots
- Biodiversity hotspots are home to nearly two billion people, many of whom belong to some of the world’s poorest communities. These populations depend directly on the natural resources and ecosystem services provided by the local environment for their livelihoods, such as clean water, fertile soil, and climate regulation. While population density is often high in these areas, it is not the primary cause of biodiversity decline. Rather, it is human activity such as deforestation, pollution, and overexploitation of resources that poses the most significant threats.
Ecological Importance and Benefits
- Biodiversity hotspots play a vital role in maintaining ecological balance. They provide essential services including pollination, carbon sequestration, water purification, and nutrient cycling. Conservation of these areas supports not only environmental health but also economic growth and regional stability. Healthy ecosystems reduce the risk of conflict by supporting sustainable livelihoods and food security.
Origin and Evolution of the Hotspot Concept
- The concept of biodiversity hotspots was introduced in 1988 by British ecologist Norman Myers, who initially identified 10 tropical forest regions that were both rich in species and severely threatened. In 1989, Conservation International adopted Myers’ idea as its organizational strategy. In 1999, a global reassessment led to the introduction of strict quantitative criteria for hotspot designation, which increased the number of recognized hotspots to 25. By 2005, this number had expanded to 34. In 2011, the Forests of East Australia became the 35th hotspot, and in 2016, the North American Coastal Plain was designated as the 36th hotspot following a detailed scientific review.
