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Researchers from Plymouth University reveal that the acidification of the ocean could be causing changes in the "population dynamics" of marine species, not letting them adapt to climate change. By examining the gastropod 'Hexaplex trunculus' and its reaction to ocean acidification over a number of generations, the researchers found that "they tend to trade off the maintenance of their shells in order to compensate for the living conditions of acidified oceans," according to HNGN.

"Despite growing evidence for direct impacts on specific species, few studies have simultaneously considered the effects of ocean acidification on individuals and population-level demographic processes," Ben Harvey, who participated in the research, said in a press release."By using carbon dioxide vents as natural laboratories, we have found that ocean acidification may hamper normal breeding habits and reduce the potential for species to adapt."

The team probed into 'H. trunculus' at three sites with different carbon-dioxide levels near Isola Vulcano in Sicily. Those located at the site with more carbon-dioxide had a shorter mean shell length as well as thinner shells than those at "neutral-carbon-dioxide" sites. Moreover, there were fewer females in the acidic pH site.

Higher metabolic rates were found in specimens in the acidic waters, which showed "acclimatisation". The team arrived at this decision after relocating the specimens following 14 days of exposure and analysing their physiological response through the metabolic rate.

"Acclimatization can buffer populations against the immediate impacts of ocean acidification, and even provide time for adaptation," said Samuel Rastrick, who participated in the research. "However, it can also result in stress-induced energetic trade-offs, and unless organisms can compensate for the extra costs caused by ocean acidification, then they may suffer negative consequences in the form of reduced growth, development and reproduction."

"Should organisms be unable to maintain their energy budgets, then they may lack the necessary energy to contribute to future generations," added Pippa Moore, co-author of the study.

The findings were published in the Jan. 29,2016 issue of Scientific Reports.