agDrylands casestudy

agDrylands casestudy - Biodiversity:DrylandsCasestudy...

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Biodiversity: Drylands Casestudy Biodiversity definition: ‘the variability among living organisms from all sources… this includes diversity with  species, between species and of ecosystems’ (UNCBD, 1992) Biodiversity hotspot  habitat loss (>70% of original habitat). 1.4% of land is considered biodiversity hotspot: containing 44% of plant and 35% of  vertebrate species. ENDEMISM   when a species is unique to a particular geographic location. --- Value of biodiversity: o Ecological (ecosystem services, carbon cycling, nutrient cycling, etc) o Economic (medicine, food, tourism, etc) o Social (livelihoods, religious, cultural, etc) Dryland biodiversity: o Temporally and spatially dynamic systems o Dryland biodiversity-livelihoods nexus: People depend on dryland biodiversity o For agricultural production o For resilience (more diverse = less vulnerable) o For diversified incomes (= more security) o For income from natural resources Dryland livelihood options: o Pastoralism (livestock keeping)
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This note was uploaded on 02/22/2012 for the course AG 2373 taught by Professor Staff during the Fall '10 term at Texas State.

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agDrylands casestudy - Biodiversity:DrylandsCasestudy...

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