| Titre : | Estuaries 25(4B) - AUG 2002 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
D. J. Conley, Auteur ;
S. Markager, Auteur ;
J. Andersen, Auteur ;
T. Ellermann, Auteur ;
L. M. Svendsen, Auteur
Nutrient over-enrichment and cultural eutrophication are significant problems in the Danish marine environment. Symptoms of eutrophication include periods of hypoxia and anoxia in bottom waters, death of benthic-dwelling organisms during anoxia,[...]
Article
K. Segerson, Auteur ;
D. Walker, Auteur
Although the phenomenon of nutrient pollution can be studied using models from the environmental sciences, understanding both the human causes and the human effects of nutrient pollution requires a study of economics. The economic dimensions of [...]
Article
R. E. Turner, Auteur
Organic matter is the result of concentrating a few non-metals that are relatively rare in the earth's crust. Most of these essential elements are in a rough proportionality within phylogenetic groupings. Life is thus working against a concentra[...]
Article
O. C. Doering, Auteur
Most public decisions ultimately have economic content. Decisions that deal with externalities, such as pollution, carry costs as well as benefits for society. Actions that mitigate nutrient over-enrichment in the Gulf of Mexico would require ac[...]
Article
"A strikingly rich zone" - Nutrient enrichment and secondary production in coastal marine ecosystems
S. W. Nixon, Auteur ;
B. A. Buckley, Auteur
Despite a recent review concluding that there is little or no reason to expect that the production of fish and other animals will increase with nutrient enrichment or eutrophication, there is a variety of evidence that anthropogenic nutrients ca[...]
Article
D. Breitburg, Auteur
A reduction in dissolved oxygen concentration is one of the most important direct effects of nutrient over-enrichment of coastal waters on fishes. Because hypoxia can cause mortality, reduced growth rates, and altered distributions and behaviors[...]
Article
A. M. Szmant, Auteur
Coral reefs are degrading worldwide at an alarming rate. Nutrient over-enrichment is considered a major cause of this decline because degraded coral reefs generally exhibit a shift from high coral cover (low algal cover) to low coral cover with [...]
Article
L. A. Deegan, Auteur
Coastal ecosystems such as eelgrass beds and salt marshes have always been valued for their high productivity and rich bounty of fish and shellfish. High plant productivity, complex physical structure, and suitable environmental characteristics [...]
Article
D. F. Boesch, Auteur
Nutrient over-enrichment has resulted in major changes in the coastal ecosystems of developed nations in Europe, North America, Asia, and Oceania, mostly taking place over the narrow period of 1960 to 1980. Many estuaries and embayments are affe[...]
Article
H. W. Paerl, Auteur ;
R. L. Dennis, Auteur ;
D. R. Whitall, Auteur
Atmospheric deposition of nitrogen (AD-N) is a significant source of nitrogen enrichment to nitrogen (N)-limited estuarine and coastal waters downwind of anthropogenic emissions. Along the eastern U.S. coast and eastern Gulf of Mexico, AD-N curr[...]
Article
The role of science in federal policy development on a regional to global scale: Personal commentary
R. Bierbaum, Auteur
Nutrient enrichment of coastal waters is an example of the large-scale, highly complex environmental challenges facing decision makers today. Conventional monitoring networks and advanced observational capabilities permit the detection of change[...]
Article
S. P. Seitzinger, Auteur ;
C. Kroeze, Auteur ;
A. F. Bouwman, Auteur ;
N. Caraco, Auteur ;
F. Dentener, Auteur ;
R. V. Styles, Auteur
We examine the global distribution of dissolved inorganic nitrogen (DIN) and particulate nitrogen (PN) export to coastal systems and the effect of human activities and natural processes on that export. The analysis is based on DIN and PN models [...]
Article
N. N. Rabalais, Auteur ;
S. W. Nixon, Auteur
Article
P. Faeth, Auteur ;
S. Greenhalgh, Auteur
Surplus nitrogen from agricultural production is a leading cause of water quality problems in the U.S. It is also a source of nitrous oxide, the largest category of greenhouse gas emissions from agriculture. Any reduction in the amount of nitrog[...]
