Class Notes (834,820)
Canada (508,737)

global diversity outlook.docx

8 Pages
Unlock Document

Life Sciences
Luc Bernier

March 20 , 2013 Life Sci 2H03: Environmental Life Sciences Global Biodiversity Outlook What is the Millennium Ecosystem Assessment (MEA)? - called for by the UN Secreatary-General Kofi Annan in 2000 - objective of the MEA was to assess:  contribution of ecosystems to human well-being  consequences of ecosystem change for human well-being  scientific basis to enhance their sustainable use  based on a collective of studies done before  published in 2005 Ecosystem Services in Decline - ecosystem provide fresh water - pollination - capacity of agricultural systems to provide food for everyone with processes such as desertification leading to less land to produce crops Healthy Ecosystems: Foundation for Human Well-Being - ecosystem with low biodiversity: ability to provide a natural flow of energy is embedded when a specie disappear - in terms of the ability of the planet to filter our pollution: providing water and ability of the ecosystem to accommodate increasing word population - with increasing needs and population creating pressure on the ecosystem th - started in the 18 century - particularly in the developing countries - increasing demand for food - pressures are drivers of change , implications - we can generate models of what is happening in terms of the changes and what are the impacts on biodiversity - impacts on ecosystem services leads to more socioeconomic changes - feedback that is happening - what can be done at the socioeconomic level that would mediate the impacts on biodiversity and ecosystem services Consumption of Resources and Humanity’s Growing Footprint - increasing - we have exceed the capacity of our planet to provide these services - unequal distribution on demand of humans - some controls are using far less of their share - exceeded by about 20% of what the planet is actually able to provide - by increasing demographic pressure and the levels of consumption is leading to a decrease in biodiversity and the ability of ecosystems to provide goods we depend on - impact on different drivers on biodiversity - at the rate the drivers are modifying, in the future we see a very rapid increase of the impact - even the most remote systems are impacted Biodiversity Loss: Disrupts Ecosystem Functions - ecosystems more vulnerable to:  shocks and disturbances  less resilient  cannot provide the society with the necessary resources - damage from floods are more severe Loss of Wetlands in Mississippi Basin - as wetlands disappear, the amount of nitrogen being discharge has been increasing - same effect in phosphorous - impact of hurricane Katrina - as a result the fisheries in the Golf of Mexico are collapsing - low oxygen dead zone Loss of Primary Forest since 2000 - 6 million hectares/year - net losses encountered in South
More Less

Related notes for LIFESCI 2H03

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.