Reference Library: Nutrients

Chemical and biological impacts of ocean acidification along the west coast of North America

  • Posted on: Fri, 12/16/2016 - 10:17
  • By: jackie

The continental shelf region off the west coast of North America is seasonally exposed to water with a low aragonite saturation state by coastal upwelling of CO2-rich waters. To date, the spatial and temporal distribution of anthropogenic CO2 (Canth) within the CO2-rich waters is largely unknown. Here we adapt the multiple ...

Effects of elevated CO2 and phosphorus supply on growth, photosynthesis and nutrient uptake in the marine macroalga Gracilaria lemaneiformis (Rhodophyta)

  • Posted on: Mon, 06/13/2016 - 05:56
  • By: Anonymous

The amount of available phosphorus appeared to regulate how much inorganic carbon was used by a red alga grown at different levels of ocean acidification conditions. Growth reflected a balance between carbon and nutrient metabolism. (Laboratory study)

Marine biodiversification in response to evolving phytoplankton stoichiometry

  • Posted on: Mon, 06/13/2016 - 05:56
  • By: Anonymous

Diversification of the marine biosphere is intimately linked to the evolution of the biogeochemical cycles of carbon, nutrients, and primary productivity. Analysis of the ratio of carbon-to-phosphorus buried in sedimentary rocks during the past 3 billion years indicates that both food quantity and, critically, food quality increased through time as ...

Estuaries of the northeastern United States: Habitat and land use signatures

  • Posted on: Mon, 06/13/2016 - 05:56
  • By: Anonymous

Geographic signatures are physical, chemical, biotic, and human-induced characteristics or processes that help define similar or unique features of estuaries along latitudinal or geographic gradients. Geomorphologically, estuaries of the northeastern U.S., from the Hudson River estuary and northward along the Gulf of Maine shoreline, are highly diverse because of a ...

Influences of oceanographic processes on the biological productivity of the Gulf of Maine

  • Posted on: Mon, 06/13/2016 - 05:56
  • By: Anonymous

The Gulf of Maine's unusual geography and oceanography make it distinct from other continental shelf ecosystems. It has deep basins, shallow offshore banks that limit water flow between the Gulf and the open Atlantic Ocean, strong tidal mixing of it shallower waters, and a seasonal cycle of intense winter cooling, ...

Ocean warming, more than acidification, reduces shell strength in a commercial shellfish species during food limitation

  • Posted on: Mon, 06/13/2016 - 05:56
  • By: Anonymous

After six months exposure, warmer temperatures, but not ocean acidification, significantly reduced the shell strength of blue mussels, which were fed for a limited period of only 4-6 hours per day. The rising temperatures seemed to affect shell strength indirectly, as the mussels apparently re-allocated energy from shell formation to ...

Effect of ocean acidification on iron availability to marine phytoplankton

  • Posted on: Mon, 06/13/2016 - 05:56
  • By: Anonymous

Ocean acidification conditions reduced the amount of dissolved iron taken up by diatoms and coccolithophores. Iron is a limiting nutrient in large oceanic regions, and the ongoing acidification of seawater is likely to increase the iron stress of phytoplankton populations in some areas of the ocean. (Laboratory study)

Food availability outweighs ocean acidification effects in juvenile Mytilus edulis: Laboratory and field experiments

  • Posted on: Mon, 06/13/2016 - 05:56
  • By: Anonymous

Blue mussels grew and calcified 7 times faster in the Kiel Fjord (Baltic Sea), where low pH (ocean acidification) conditions prevailed, than at an outer fjord site where pH levels were higher In addition, the mussels were able to outcompete barnacles at the inner fjord, low pH site. Thus, blue ...

Pages