June 22, 2024
Ocean acidification research is robust despite ebbs and flows
Potential factors that drive the effect sizes of calcification. ac, Bubble plots showing the change in the effect sizes with publication year (a), experimental duration (b) and average sample size (c). The solid black lines are the best-fit lines of linear regression; the sizes of the bubbles represent the average sample size. Credit: Nature Climate Change (2023). DOI: 10.1038/s41558-023-01828-9

A new objective examination of almost a quarter-of-a-century of ocean acidification research shows that, despite challenges, experts in the field can have confidence in their research.

The University of Adelaide’s Professor Sean Connell from the Ecology and Evolutionary Biology unit led the study.

“In our field, the marine science community was galvanized by the demonstration of how impairs shell-building life, which has profound implications for life on the planet,” he said.

“It is an inescapable fact that ocean acidification does impose on shell-building life.”

This field is transformational and one of the most studied single topics in in recent times.

Like all , findings were subjected to intense scrutiny including how to reproduce early results. Early in the history of ocean acidification research, controversy erupted over a set of failures to reproduce its effects on key behaviors of tropical fish.

“We believe that sufficient time has passed to allow the field to look objectively into its and rebuild confidence for the future,” said Professor Connell.

“We did so by assessing one of the largest databases in ocean acidification research—the calcification of shell-building life.”

The team assembled an exhaustive meta-analysis of calcification studies over the last 24 years.

“Pioneering studies were often marked by large negative effects, but the size of these effects declined over the years,” said Professor Connell.

“Notable exceptions seemed to highlight potential insights into less studied processes, such as compensatory dynamics.”

This new study, which is published in Nature Climate Change, highlights the decline effect—a common phenomenon in many disciplines.

Results from the pioneers appeared impressive, but subsequent attempts by other researchers to replicate the same findings become less impressive as they assessed how the results reproduce in their own work.

“The key point is that the negative effects of ocean acidification remain and are frequently observed to this day,” said Professor Connell.

“In the case of ocean acidification on calcification, the discoveries of the past 24 years have been reproducible.”

“The failure to reproduce large effects in pioneering studies may not represent a crisis, but most often a normal part of theory development.”

Like most human endeavors, science is subject to imperfections inherent in . Humans tend to seek information that confirms their existing beliefs or knowledge, but where the fails to reproduce the same results—the theory fails and science moves on.

“Our study shows that researchers of ocean acidification can have confidence in their research community; researchers have been contributing robust data,” said Professor Connell.

“The growing pains of maturation of ocean acidification research is not so distinctive from other disciplines, their toil, setbacks and legacies.”

More information:
Sean Connell et al, Reproducibility crisis and gravitation towards a consensus in ocean acidification research, Nature Climate Change (2023). DOI: 10.1038/s41558-023-01828-9. www.nature.com/articles/s41558-023-01828-9

Ocean acidification research is robust despite ebbs and flows, study finds (2023, September 25)
retrieved 25 September 2023
from https://phys.org/news/2023-09-ocean-acidification-robust-ebbs.html

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