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Record 1 of 493
Global Patterns in Human Consumption of Net Primary Production
Author and Affiliation:
Imhoff, Marc L.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Bounoua, Lahouari(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Ricketts, Taylor(World Wildlife Fund, Inc., Washington, DC, United States)
Loucks, Colby(World Wildlife Fund, Inc., Washington, DC, United States)
Harriss, Robert(National Center for Atmospheric Research, Environmental and Societal Impacts Group, Boulder, CO, United States)
Lawrence William T.(Bowie State Univ., Dept. of Natural Sciences, MD, United States)
Abstract: The human population and its consumption profoundly affect the Earth's ecosystems. A particularly compelling measure of humanity's cumulative impact is the fraction of the planet's net primary production that we appropriate for our Net primary production-the net amount of solar energy converted to plant organic matter through photosynthesis-can be measured in units of elemental carbon and represents the primary food energy source for the world's ecosystems. Human appropriation of net primary production, apart from leaving less for other species to use, alters the composition of the atmosphere, levels of biodiversity, flows within food webs and the provision of important primary production required by humans and compare it to the total amount generated on the landscape. We then derive a spatial ba!mce sheet of net primary production supply and demand for the world. We show that human appropriation of net primary production varies spatially from almost zero to many times the local primary production. These analyses reveal the uneven footprint of human consumption and related environmental impacts, indicate the degree to which human populations depend on net primary production "imports" and suggest policy options for slowing future growth of human appropriation of net primary production.
Publication Date: Jan 01, 2004
Document ID:
20040171603
(Acquired Dec 02, 2004)
Subject Category: EXOBIOLOGY
Document Type: Preprint
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 10p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: BIOLOGICAL DIVERSITY; DEMAND (ECONOMICS); ECOSYSTEMS; ORGANIC MATERIALS; POPULATIONS; FOOTPRINTS; PHOTOSYNTHESIS; PLANETS; POLICIES; TOPOGRAPHY
Availability Source: Other Sources
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