Regeneration of nitrogen by zooplankton and fish in the Northwest Africa and Peru upwelling ecosystems [electronic resource].
- Published
- Washington, D.C. : United States. Dept. of Energy, 1976.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- Pages: 27 : digital, PDF file
- Additional Creators
- Brookhaven National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- The availability of nutrients and light are the dominant controlling factors of the levels of primary production in the ocean. In the lower latitudes where most coastal upwelling areas are located, the amount of light is seldom below the critical level to inhibit productivity so nutrients are often the limiting factor in phytoplankton growth. Nutrients utilized in primary productivity are derived from two sources in upwelling areas. Nutrients are introduced to the euphotic zone from depth by the physical processes that create upwelling and nutrients are recycled by biological organisms that inhabit the area. Nitrate introduced into the euphotic zone by upwelling supports new productivity while ammonium and other excretory products regenerated by zooplankton and nekton supports regenerated productivity. Results are reported from studies off the coast of Northwest Africa and Peru using /sup 15/N as a tracer that showed that recycled ammonium may fulfill nearly half of the daily nitrogen requirement of phytoplankton and upwelled nitrate may provide the other half.
- Report Numbers
- E 1.99:bnl-21899
bnl-21899 - Subject(s)
- Other Subject(s)
- Fishes
- Productivity
- Phytoplankton
- Zooplankton
- Ammonia
- Atlantic Ocean
- Biomass
- Chemical Composition
- Chlorophyll
- Coastal Waters
- Depth
- Metabolism
- Mixing
- Nitrates
- Nutrients
- Oceanography
- Photochemistry
- Photosynthesis
- Seawater
- Tropical Regions
- Animals
- Aquatic Organisms
- Carboxylic Acids
- Chemical Reactions
- Chemistry
- Dimensions
- Energy Sources
- Heterocyclic Acids
- Heterocyclic Compounds
- Hydrides
- Hydrogen Compounds
- Nitrogen Compounds
- Nitrogen Hydrides
- Organic Acids
- Organic Compounds
- Organic Nitrogen Compounds
- Oxygen Compounds
- Photochemical Reactions
- Phytochromes
- Pigments
- Plankton
- Porphyrins
- Renewable Energy Sources
- Seas
- Surface Waters
- Synthesis
- Vertebrates
- Water
- Note
- Published through SciTech Connect.
01/01/1976.
"bnl-21899"
Whitledge, T E. - Funding Information
- E(30-1)-16
NSF-G-GX-33502
View MARC record | catkey: 13815146