The Importance Of Biological Diversity

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Biological diversity defines according to article two of The Convention on Biological Diversity (CBD) which entered into force on 29 December 1993 as the variability among living organisms from all sources including, inter alia, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are part; this includes diversity within species, between species and of ecosystems. Many studies try to estimate the number of living species in the earth starting from 15,000 describe species and 500,000 estimated species (Poinar, 1983) then from 3–5 million (Tangley 1997) and 50 million (May 1998) then last but not least 11 million with around 18000 species described each year (Chapman 2009) .but all studies gives an estimation number according The word recognized the importance of biodiversity for our life, its provide us with use values and non-use values such as food security , sustainability of livelihood, dietary health, medicine , control of infection disease, economics, social and culture importance, climate change adaptations…etc (Groombrige 1992,UN CBD cop10, Edwards and Abivardi1998, Markandya etal 2008, Young, 1992; after Barbier, 1991 ) . Biodiversity lost is a fact nowadays, many reason that affect the loss of biodiversity, Mainly loss of habitat is the Biggest threat that cause biodiversity lost (Murray 2015, Travis 2003, Fleschutz 2016, Groom 2006). Degradation" refers to a change of state with a negative value assessment that is
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