Future high CO2 in the intertidal may compromise adult barnacle Semibalanus balanoides survival and embryonic development rate.

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

In ocean acidification conditions (pH 7.7) embryos of an intertidal barnacle developed more slowly. Survival of adult barnacles dropped by 22 percent, and the mineral structure of adult shells changed. (Laboratory study)

Ocean acidification induces multi-generational decline in copepod naupliar production with possible conflict for reproductive resource allocation.

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

A species of copepod (Tisbe battagliai) had decreased reproduction and growth when exposed to ocean acidification conditions. Over time, these changes could result in smaller brood sizes, smaller females, and perhaps later maturing females, which could destabilize the food web. (Laboratory study)

Long-term and trans-life-cycle impacts of exposure to ocean acidification in the green sea urchin Strongylocentrotus droebachiensis

  • Posted on: Wed, 03/30/2016 - 15:13
  • By: petert

Anthropogenic CO2 emissions are acidifying the world’s oceans. A growing body of evidence demonstrates that ocean acidification can impact survival, growth, development and physiology of marine invertebrates. Here, we tested the impact of long-term (up to 16 months) and trans-life-cycle (adult, embryo/larvae and juvenile) exposure to elevated pCO2 (1,200 μatm, compared to control 400 μatm) on ...

Impact of CO2-induced seawater acidification on the burrowing activity of Nereis virens and sediment nutrient flux

  • Posted on: Wed, 03/30/2016 - 14:25
  • By: petert

A mesocosm experiment was conducted to quantify the effects of medium term (5 wk) exposure to acidified seawater on the structure of Nereis virens (Polychaeta) burrows and sediment nutrient fluxes. Worms were exposed to seawater acidified to a pH of 7.3, 6.5 or 5.6 using carbon dioxide (CO2) gas. These treatments mimicked ...

Habitat traits and food availability determine the reponse of marine invertebrates to ocean acidification

  • Posted on: Wed, 03/30/2016 - 13:01
  • By: petert

Energy availability and local adaptation are major components in mediating the effects of ocean acidification (OA) on marine species. In a long-term study, we investigated the effects of food availability and elevated pCO2 (ca. 400, 1000 and 3000 μatm) on growth of newly settled Amphibalanus (Balanus) improvisus to reproduction, and on their offspring. We also ...

Offspring sensitivity to ocean acidification changes seasonally in a coastal marine fish

  • Posted on: Wed, 03/30/2016 - 12:57
  • By: petert

 Experimental assessments of species vulnerabilities to ocean acidification are rapidly increasing in number, yet the potential for short- and long-term adaptation to high CO2 by contemporary marine organisms remains poorly understood. We used a novel experimental approach that combined bi-weekly sampling of a wild, spawning fish population (Atlantic silverside Menidia menidia) with ...

Effects of ocean acidification over the life history of the barnacle Amphibalanus amphitrite

  • Posted on: Wed, 03/30/2016 - 12:38
  • By: petert

Increased levels of atmospheric CO2 are anticipated to cause decreased seawater pH. Despite the fact that calcified marine invertebrates are particularly susceptible to acidification, barnacles have received little attention. We examined larval condition, cyprid size, cyprid attachment and metamorphosis, juvenile to adult growth, shell calcium carbonate content, and shell resistance to ...

Meta-analysis reveals negative yet variable effects of ocean acidification on marine organisms

  • Posted on: Wed, 03/30/2016 - 12:01
  • By: petert

Ocean acidification is a pervasive stressor that could affect many marine organisms and cause profound ecological shifts. A variety of biological responses to ocean acidification have been measured across a range of taxa, but this information exists as case studies and has not been synthesized into meaningful comparisons amongst response ...

Impacts of ocean acidification on marine organisms: quantifying sensitivities and interaction with warming

  • Posted on: Tue, 03/29/2016 - 18:06
  • By: petert

Ocean acidification represents a threat to marine species worldwide, and forecasting the ecological impacts of acidification is a high priority for science, management, and policy. As research on the topic expands at an exponential rate, a comprehensive understanding of the variability in organisms' responses and corresponding levels of certainty is ...

Have we been underestimating the effects of ocean acidification in zooplankton?

  • Posted on: Tue, 03/29/2016 - 14:42
  • By: petert

Understanding how copepods may respond to ocean acidification (OA) is critical for risk assessments of ocean ecology and biogeochemistry. The perception that copepods are insensitive to OA is largely based on experiments with adult females. Their apparent resilience to increased carbon dioxide (pCO2) concentrations has supported the view that copepods ...

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