The Threat of Ocean Acidification

There is growing evidence that the gravest peril for ocean species may be posed by “the other CO2 problem” — acidification of the world’s oceans as a consequence of the influx of carbon dioxide generated by human activities.

2 minute read

January 16, 2008, 5:00 AM PST

By sbuntin


As executive secretary of the Convention on Biological Diversity Ahmed Djoghlaf recently observed, "Climate change has become one of the greatest drivers of biodiversity loss." Indeed, the latest assessment by the UN's Intergovernmental Panel on Climate Change concluded that 20 to 30 percent of species would likely face an increased risk of extinction if globally averaged temperatures rise 1.5-2.5ºC above 1980-1999 levels, and that 40 to 70 percent of species could be rendered extinct should temperature increases exceed 3.5ºC, a temperature scenario that is becoming increasingly possible by the end of this century. A large portion of the species that are imperiled inhabit the world's oceans, including fish, marine mammals, corals reef ecosystems, and plankton.

The vast majority of oceanic climate research in recent years has focused on the potential impacts of increasing temperatures on ocean ecosystems as a consequence of rising levels of anthropogenically-generated carbon dioxide and other greenhouse gases, including methane, nitrous oxide, and chloroflourocarbons. However, there is growing evidence that the gravest peril for ocean species may be posed by what Victoria Fabry of the Pacific Marine Environmental Laboratory has termed "the other CO2 problem"-acidification of the world's oceans as a consequence of the influx of carbon dioxide generated by human activities.

This article assesses the threat posed by ocean acidification during this century and beyond. It outlines the science associated with ocean acidification, assesses the likely impacts of ocean acidification on species and ecosystems over a horizon of the next 300 years, and lays out an agenda for future research.

Thursday, January 10, 2008 in Terrain.org: A Journal of the Built & Natural Environments

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Cover CM Credits, Earn Certificates, Push Your Career Forward

Aerial view of town of Wailuku in Maui, Hawaii with mountains in background against cloudy sunset sky.

Maui's Vacation Rental Debate Turns Ugly

Verbal attacks, misinformation campaigns and fistfights plague a high-stakes debate to convert thousands of vacation rentals into long-term housing.

July 1, 2025 - Honolulu Civil Beat

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

July 2, 2025 - Diana Ionescu

Map of Haussmann's redesign of Paris in the 1850s through 1870s under Napoleon III.

In Urban Planning, AI Prompting Could be the New Design Thinking

Creativity has long been key to great urban design. What if we see AI as our new creative partner?

June 30, 2025 - Tom Sanchez

Street with parking protected bike lane and parked cars in downtown Portland, Oregon.

Portland Raises Parking Fees to Pay for Street Maintenance

The city is struggling to bridge a massive budget gap at the Bureau of Transportation, which largely depleted its reserves during the Civd-19 pandemic.

July 8 - Willamette Week

Aerial view of Spokane, Washington with river in foreground.

Spokane Mayor Introduces Housing Reforms Package

Mayor Lisa Brown’s proposals include deferring or waiving some development fees to encourage more affordable housing development.

July 8 - The Spokesman-Review

Close-up on black and white "Bike Lane Ends" sign with bike logo.

Houston Mayor Kills Another Bike Lane

The mayor rejected a proposed bike lane in the Montrose district in keeping with his pledge to maintain car lanes.

July 8 - Houston Public Media

Urban Design for Planners 1: Software Tools

This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.

Planning for Universal Design

Learn the tools for implementing Universal Design in planning regulations.

Associate/Senior Planner

Gallatin County Department of Planning & Community Development

Senior Planner

Heyer Gruel & Associates PA