نتایج جستجو برای: marine water

تعداد نتایج: 629893  

2003
K. Katsaros

Processes at the Mineral}Water and Particle}Water Interface in Natural Systems. New York: John Wiley & Sons. Summers RM (1989) Point and Non-point Source Nitrogen and Phosphorus Loading to the Northern Chesapeake Bay. Maryland Department of the Environment, Water Management Administration, Chesapeake Bay Special Projects Program, Baltimore, MD. Wiltshire KH (1992) The inSuence of microphytobent...

2006
Xueqing Gao Ola A. Olapade Mark W. Kershner Laura G. Leff

Algal-bacterial co-variation has been frequently observed in lentic and marine environments, but the existence of such relationships in lotic ecosystems is not well established. To examine possible co-variation, bacterial number and chlorophyll-a concentration in water and sediments of nine streams from different regions in the USA were examined. In the water, a strong relationship was found be...

Journal: :Nature nanotechnology 2009
John L Ferry Preston Craig Cole Hexel Patrick Sisco Rebecca Frey Paul L Pennington Michael H Fulton I Geoff Scott Alan W Decho Shosaku Kashiwada Catherine J Murphy Timothy J Shaw

Within the next five years the manufacture of large quantities of nanomaterials may lead to unintended contamination of terrestrial and aquatic ecosystems. The unique physical, chemical and electronic properties of nanomaterials allow new modes of interaction with environmental systems that can have unexpected impacts. Here, we show that gold nanorods can readily pass from the water column to t...

2007
James Roumasset

This paper develops a regional hydrologic-ecologic-economic model of groundwater use and a nearshore ecosystem. Particularly, we model coastal groundwater management and its effects on discharge, nearshore water quality, and marine biota (e.g., indigenous marine algae). We show that incorporating the external effects on nearshore resources increases the optimal steady-state head level. Numerica...

Journal: :Environmental science & technology 2009
Noreen Parks

Noreen Parks Environ. Sci. Technol., Article ASAP DOI: 10.1021/es901664n Publication Date (Web): June 24, 2009 Copyright © 2009 American Chemical Society With mounting evidence that ocean waters worldwide are turning more acidic, scientists have issued ever more urgent pleas for policy makers to recognize that this phenomenon is a direct and real consequence of rising levels of atmospheric CO2....

Journal: :The Science of the total environment 2016
Juan José Alava Frank A P C Gobas

To track the long term bioaccumulation of (137)Cs in marine organisms off the Pacific Northwest coast of Canada, we developed a time dependent bioaccumulation model for (137)Cs in a marine mammalian food web that included fish-eating resident killer whales. The model outcomes show that (137)Cs can be expected to gradually bioaccumulate in the food web over time as demonstrated by the increase o...

2013
Francisco Acosta David Kamanda Ngugi Ulrich Stingl

BACKGROUND Picoeukaryotes are protists ≤ 3 μm composed of a wide diversity of taxonomic groups. They are an important constituent of the ocean's microbiota and perform essential ecological roles in marine nutrient and carbon cycles. Despite their importance, the true extent of their diversity has only recently been uncovered by molecular surveys that resulted in the discovery of a substantial n...

2011
Stephen D. Simpson Andrew N. Radford Edward J. Tickle Mark G. Meekan Andrew G. Jeffs

Auditory information is widely used throughout the animal kingdom in both terrestrial and aquatic environments. Some marine species are dependent on reefs for adult survival and reproduction, and are known to use reef noise to guide orientation towards suitable habitat. Many others that forage in food-rich inshore waters would, however, benefit from avoiding the high density of predators reside...

2007
Robert McFarlane James Lester

The upper coast of Texas has potential for onshore and offshore wind farm installations. Seabirds are important apex predators of estuarine and nearshore marine ecosystems and may be impacted by electricity-generating wind turbines. The area also is a crossroads for trans-Gulf and circum-Gulf of Mexico migrating land birds. Determination of avian density on land is facilitated by laser rangefin...

Journal: :Malaysian family physician : the official journal of the Academy of Family Physicians of Malaysia 2013
F Ongkili Darlene Cheah Phee-Kheng

The North Borneo state of Sabah is known worldwide for its beautiful islands and dive sites. Local hospitals deal with a number of marine-related injuries, including marine fauna envenomation by Scorpaenidae and Synanceiidae families of fish. We report a case of a tourist who presented with excruciating pain on her right foot after stepping on a stonefish. Despite being given parenteral analges...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید