Biodiversity & Human Well-being
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4.1 What is a "driver" and how does it affect biodiversity?The source document for this Digest states:
Box 3.1. Direct Drivers: Example from Southern African Sub-global Assessment Source & ©:
Millennium Ecosystem Assessment Chapter 3, p.47
4.2 What are indirect drivers of biodiversity change?The source document for this Digest states:
Source & ©: Millennium Ecosystem Assessment Chapter 3, p.49
4.3 Which direct drivers are critical in different ecosystems?The source document for this Digest states:
Source & ©: Millennium Ecosystem Assessment Chapter 3, p.47
4.4 How are specific direct drivers affecting biodiversity?
4.4.1 Habitat changeThe source document for this Digest states:
Figure 3.15 Click on any continent below to view maps which estimate the amount of: Source & ©: Millennium Ecosystem Assessment Chapter 3, p.51
4.4.2 Invasive alien speciesThe source document for this Digest states:
Source & ©: Millennium Ecosystem Assessment Chapter 3, p.52
4.4.3 OverexploitationThe source document for this Digest states:
Source & ©:
Millennium Ecosystem Assessment Chapter 3, p.53
4.4.4 Nutrient loading (/pollution)The source document for this Digest states:
Source & ©:
Millennium Ecosystem Assessment Chapter 3, p.53
4.5 How is climate change affecting biodiversity?The source document for this Digest states:
Source & ©:
Millennium Ecosystem Assessment Chapter 3, p.56
4.6 How quickly are drivers causing change?The source document for this Digest states:
Source & ©:
Millennium Ecosystem Assessment Chapter 3, p.57 What is the cause of the greatest loss of biodiversity?The main direct cause of biodiversity loss is land use change (primarily for large-scale food production) which drives an estimated 30% of biodiversity decline globally. Second is overexploitation (overfishing, overhunting and overharvesting) for things like food, medicines and timber which drives around 20%.
What is the greatest risk to loss of biodiversity?Habitat loss from exploitation of resources, agricultural conversion, and urbanization is the largest factor contributing to the loss of biodiversity. The consequent fragmentation of habitat results in small isolated patches of land that cannot maintain populations of species into the future.
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