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Primary productivity
The transformation of chemical or solar energy to biomass. Most primary production occurs through photosynthesis, whereby green plants convert solar energy, carbon dioxide, and water to glucose and eventually to plant tissue. In addition, some bacteria in the deep sea can convert chemical energy to biomass through chemosynthesis. (source: WCMC) Background from Wikipedia Global oceanic and terrestrial photoautotroph abundance, from September 1997 to August 2000. As an estimate of autotroph biomass, it is only a rough indicator of primary production potential, and not an actual estimate of it. Provided by the SeaWiFS Project, NASA/Goddard Space Flight Center and ORBIMAGE. Primary production is the production of organic compounds from atmospheric or aquatic carbon dioxide, principally through the process of photosynthesis, with chemosynthesis being much less important. All life on earth is directly or indirectly reliant on primary production. The organisms responsible for primary production are known as primary producers or autotrophs, and form the base of the food chain. In terrestrial ecosystems, these organisms are mainly plants, while in aquatic ecosystems algae are primarily responsible. Primary production is distinguished as either net or gross, the former accounting for losses to processes such as cellular respiration, the latter not. Nature.com (subscription),Primary productivity, as measured by chlorophyll concentration, has fallen by 40% during the past 30 years, reflecting a dwindling of the spring bloom of Science & Tech - Oct 16, 2007 The California Aggie Online,By JENNIFER WOLF Humans consume nearly a quarter of Earth's productivity Primary productivity is performed by photosynthetic organisms which have the Trees and Their Roots in a Changing World - Sep 25, 2007 CO2 Science Magazine,...they report that "recent analysis in experiments with elevated CO2 concentrations have shown increases of the forest net primary productivity by about The Last Ice Sheet Recession Along the East Antarctic Margin: A ... - Oct 11, 2007 The New York Academy of Sciences,...and the Holocene is characterized by varved couplets deposited during a short interval of extremely high primary productivity in a fjord-like setting. Discussions about Energy and Our Future - Oct 2, 2007 The Oil DrumIt is a discussion of Net Primary Productivity and Net Ecosystem Productivity, as well as the USDA/DOE billion ton vision - Biomass as feedstock for a What Have We Done? - Oct 4, 2007 PR-GB.com (press release),We humans, a single species among millions, consume about forty percent of Earth’s primary productivity, forty percent of all there is. Bad news for Didymo, good news for fish - Sep 28, 2007 Rapid City Journal,..."The fertilizer did increase the primary productivity in areas below where it was released," Carreiro said. "But we might not see the effects (on fish) Letters: Oct. 5: Reshuffling students won’t end crowding - Oct 5, 2007 Corvallis Gazette Times,...including decreased primary productivity of lakes (6–9% per year) and declining numbers of soil invertebrates (more than 10% per year). Humans appropriate 24% of Earth's productivity - Jul 25, 2007 Mongabay.comKlagenfurt University show that humans are presently appropriating 23.8% of potential net primary productivity -- 15.6 pentagram of carbon per year. Indirect radiative forcing of climate change through ozone effects ... - Jul 25, 2007 Nature.com (subscription),Tropospheric ozone is known to damage plants, reducing plant primary productivity and crop yields 5 , yet increasing atmospheric carbon dioxide Catastrophic nature of Global Warming - Aug 15, 2007 Ceylon Daily News,The consequences will be ever larger if warming affects basic ecological processes such as primary productivity, reef building, and the lifestyles Anderton Speech: Rural & Associated Contractors - Jul 29, 2007 Scoop.co.nz,It’s my pleasure to be here to open this conference − and to welcome those of you from other regions to Canterbury. With the start of the NPC, Aegean Sea Seen As Driver Of Changes In The Eastern Mediterranean - Jul 23, 2007 Science Daily (press release)...which is otherwise consumed by decomposition of organic material raining down from the surface waters where primary productivity occurs. Full Text - Apr 12, 2007 Science Magazine (subscription)To understand the impact of a fishery upon an ecosystem, we need information on how it influences lower trophic level organisms, primary productivity, Dire predictions - Apr 10, 2007 Daily News & Analysis,This will impact boundaries of forest types and areas, primary productivity, species population and migration, occurrence of pests and diseases and forest <p><center><img border=1 src=http://image2.sina.com.cn/edu/en/2007 ... - Apr 2, 2007 新浪网,The primary productivity of the epipelagic waters above the submerged peak can often be enhanced by the hydrographic conditions of the seamount. Caribbean coral reefs result of mass extinction, rise of isthmus - Mar 12, 2007 Mongabay.com..."The existence of the C. megalodon shark shows how the Caribbean was very different to how it is today - that there was enough primary productivity in the Himalayan concerns - Feb 27, 2007 Frontline,Also, the increase in atmospheric CO 2 and warming could result in a 70 to 100 per cent increase in the Net Primary Productivity (NPP) of forests. Mangalore: Mangrove to protect coastline against floods - Feb 19, 2007 Bellevision,These elements contribute mainly to the primary productivity. Apart from this, faunal elements like zooplankton are responsible for secondary productivity Climate Change Roundtable - Feb 27, 2007 Foreign Policy In FocusIt turns out that plankton make up half of the planet's primary productivity but, in the face of increasing concentrations of atmospheric CO2—affecting Rising heat is killing us softly - Feb 15, 2007 Daily News & Analysis,This will impact boundaries of forest types and areas, primary productivity, species population and migration, occurrence of pests and diseases and forest Assessing Microbial Community Diversity Using Amplicon Length ... - Mar 12, 2007 Soil Science Society of America Journal (subscription)The vast majority of the planet's net primary productivity flows through microorganisms, fueling key steps in the biogeochemical cycles of C, N, 71 Percent of Remote Office Workers Surveyed Experience ... - Dec 4, 2006 Business Wire (press release),In addition, 40 percent of respondents found that application response time over the WAN is the primary productivity issue faced by the distributed The Effect of Elevated CO2 on Respiration from Soil in Which Pine ... - Dec 19, 2006 CO2 Science Magazine,Net primary productivity of a CO2-enriched deciduous forest and the implications for carbon storage. Ecological Applications 12: 1261-1266. Plantecology: The cost of leafing - Nov 29, 2006 Nature.com (subscription),..."Looking at Amazonia, we tend to find that incorporating these data into our models leads to changes in leaf longevity and primary productivity of about Full Text - Nov 23, 2006 Science Magazine (subscription)...for substantially higher erosion and/or mineralization rates is one of continuously decreasing terrestrial primary productivity toward the present. Tsunami-Triggered Waves Impact Northern California - Nov 30, 2006 The Log Newspaper,...their ideas imply that bacteria may be actively changing the chemistry of seawater in ways that fundamentally influence primary productivity in the sea. Global gene expression of Prochlorococcus ecotypes in response to ... - Oct 4, 2006 Nature.com (subscription),Owing to its abundance, Prochlorococcus contributes significantly to global primary productivity and, ultimately, influences the composition of the Earth's ... DreamBox releases Security Management System for DreamBox ... - Sep 25, 2006 Security Park,DreamBox’s Security Management System can serve as the primary productivity and management tool in the security control room, providing real-time information ... Capitol Energy Announces Waterflood Pilot Approval - Sep 25, 2006 CNW Telbec (Communiqués de presse),...by increasing pressure and a reduction in gas/oil ratios in the offsetting producing oil wells, followed by reductions in primary productivity declines and ... Melting Arctic Ocean Ice Raises Warming Concerns - Sep 23, 2006 TheDay (subscription),...shelf. “The more open water will stimulate a little bit of extra primary productivity� among plankton and algae, he said. But ... News index | RSS | News Feed Advertisements: Organic Apparel from Patagonia | Insect-repelling clothing |
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