Biodiversity

**Historical Development of the Term Biodiversity:**
– 1916: J. Arthur Harris introduced ‘biological diversity.’
– 1967: Raymond F. Dasmann referenced biological diversity.
– 1974: John Terborgh coined ‘natural diversity.’
– 1980: Thomas Lovejoy popularized ‘biological diversity.’
– 1985: W. G. Rosen coined the term ‘biodiversity.’

**Definition and Scope of Biodiversity:**
– Biodiversity encompasses genes, species, and ecosystems.
– Key aspects include taxonomic, ecological, morphological, and functional diversity.
– Biological diversity was explicitly defined by Bruce A. Wilcox.
– The 1992 UN Earth Summit defined biodiversity as variability among living organisms.
– Gaston and Spicer described biodiversity as variation at all biological levels.

**Current Status and Distribution of Biodiversity:**
– Approximately 8.7 million terrestrial species and 2.2 million oceanic species exist.
– Tropical regions host a significant portion of Earth’s biodiversity.
– Marine coastal biodiversity peaks in the Western Pacific.
– 36 hotspot regions globally require attention for biodiversity conservation.
– Forests are crucial for Earth’s biodiversity conservation.

**Threats to Biodiversity and Conservation Efforts:**
– Habitat destruction, overexploitation, and climate change are major threats.
– Wildlife populations have declined significantly since 1970.
– Up to 30% of all species may face extinction by 2050.
– Conservation efforts are crucial for preserving biodiversity.
– International cooperation and public awareness are vital for conservation.

**Role, Benefits, and Importance of Biodiversity:**
– Biodiversity provides ecosystem services valued at US$33 trillion annually.
– Greater species diversity stabilizes ecosystems and enhances services.
– Biodiversity influences agriculture, human health, and industry.
– Drug discovery heavily relies on biodiversity for medicinal resources.
– Earth’s biodiversity provides essential resources for human use.