Reference Library: Food web

Effects of ocean acidification, temperature and nutrient regimes on the appendicularian Oikopleura dioica: A mesocosm study

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

Appendicularians are free-swimming tunicates that are common in most oceans, coastal waters, and estuaries. They build delicate, gelatinous houses that they use to filter food from the water. This study found that appendicularian abundance increased with ocean acidification, warmer temperatures, and higher nutrient levels. This suggests that appendicularians will play ...

Multigenerational exposure to ocean acidification during food limitation reveals consequences for copepod scope for growth and vital rates

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

The copepod Calanus finmarchicus had reduced growth, development, and fecundity when exposed to ocean acidification conditions. However, offspring in the next generation did not have delayed development, suggesting that the species may have an ability to adapt to ocean acidification. The results also suggest that in a more acidified ocean ...

Ocean acidification and rising temperatures may increase biofilm primary productivity but decrease grazer consumption.

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

Common periwinkles consumed less food when living under ocean acidification conditions for five weeks, after having been exposed to those conditions for two weeks prior to the experiment. Their food—a biofilm of diatoms, cyanobacteria, and various microbes—increased during that period. However, another group of periwinkles consumed more food than the ...

Energetic plasticity underlies a variable response to ocean acidification in the pteropod, Limacina helicina antarctica

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

Ocean acidification conditions suppressed the metabolism of an Antarctic pteropod by approximately 20 percent in some instances. However, the effect on metabolism depended on abundance of phytoplankton in the region and the pteropods' baseline level of metabolism. Pteropod populations may be compromised by climate change, both directly by acidification-related suppression ...

Altered kelp (Laminariales) phlorotannins and growth under elevated carbon dioxide and ultraviolet-B treatments can influence associated intertidal food webs

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

Two species of brown kelp responded differently to being grown for 55 days under ocean acidification conditions. One grew more, and the other grew less. There were negative indirect effects on black turban snails that fed on the kelp. (Laboratory study)

Ocean acidification affects growth but not nutritional quality of the seaweed Fucus vesiculosus (Phaeophyceae, Fucales)

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

A brown seaweed (Fucus vesiculosus) grew more slowly in ocean acidification conditions. Consumption of the seaweed by an isopod (Idotea emarginata) was not affected by ocean acidification or temperature. However, reduced growth of the seaweed at high CO2 concentrations might reduce its capability to recover from intense herbivory.

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