Reference Library: Zooplankton

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 ...

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 ...

Effects of high CO2 seawater on the copepod (Acartia tsuensis) through all life stages and subsequent generations.

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

Ocean acidification conditions did not affect survival, body size, or developmental speed of a copepod species during any of its life stages. Egg production and hatching rates also did not change among generations of females exposed to ocean acidification conditions. Thus, this copepod appears more tolerant to ocean acidification than ...

Effects of raised CO2 concentration on the egg production rate and early development of two marine copepods (Acartia steueri and Acartia erythraea)

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

Reproduction and larval development of two copepod species were sensitive to extreme ocean acidification conditions. The hatching rate tended to decrease, and mortality rate of young copepods tended to increase. (Laboratory study)

Sensitivity to ocean acidification parallels natural pCO2 gradients experienced by Arctic copepods under winter sea ice

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

Some copepods (Calanus species) in the Arctic routinely encounter a range of seawater pH levels each day as they migrate vertically in the ocean; they were not severely affected when exposed to ocean acidification conditions in the laboratory. In contrast, a copepod species (Oithona similis) that does not vertically migrate, ...

Impact of ocean acidification and elevated temperatures on early juveniles of the polar shelled pteropod Limacina helicina: Mortality, shell degradation, and shell growth.

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

When pre-winter juvenile pteropods were cultured at a range of warmer temperatures and ocean acidification levels for 29 days, temperature was the overriding cause of increased mortality. However, ocean acidification was the main factor in reducing shell diameter by 10-12 percent and increasing shell degradation by 41 percent. This study ...

The metabolic response of pteropods to acidification reflects natural CO2-exposure in oxygen minimum zones.

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

Four species of pteropods from the tropical Pacific Ocean that naturally migrate into low-oxygen waters were not adversely affected when grown under ocean acidification conditions. However, another pteropod species, which does not migrate, responded to ocean acidification conditions with reduced oxygen consumption and ammonia excretion. This indicates that the natural ...

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