Biodiversity management in the 21st. century

There is general agreement among ecologists on how human activity is causin g global change. Deforestation, atmospheric ozone depletion, increased conc entration of greenhouse gases, erosion, desertification, and species extinc tions are a few examples of the global effects of human activity. These tre nds are expected to continue into an era known as the Homogeocene, when hum an effects on Earth will be even more obvious than today. There is disagree ment among ecologists on how to approach the conservation of the world's bi odiversity, both today and in the Homogeocene. Ecosystem management with a focus on function is advocated as the approach for the conservation of biod iversity. Such an approach values all species, including alien species, and uses multiple seeding, ecosystem self-design and resilience, and land reha bilitation as the guiding principles of conservation.