Articles written by John Pohl

US science agencies are often led by non-scientist political appointees. This time, however, the head of US marine resources is a world class marine ecologist.

Jun 1, 2009 - John Pohl

Discovery Channel's program, Deadliest Catch, showcases commercial fishing. The real untold story behind Bering Sea fishing, however, is changing climate.

May 16, 2009 - John Pohl

Marine biologists are scientists who study the organisms living in the ocean. Theirs a multifaceted discipline, but one unified by wonder at Life beneath the waves.

May 9, 2009 - John Pohl

Environmental and economic challenges assail the globe. Finding common ground whereupon biologist's and business's energy can focus may help reverse the crisis' momentum.

Apr 27, 2009 - John Pohl

Historically, humans have valued the goods provided by marine ecosystems - yet failed to see the valuable planetary life support services those same ecosystems provide.

Mar 3, 2009 - John Pohl

Marine ecosystems with a range of species and healthy populations prove most resilient and adaptable to environmental change. Here's why.

Feb 27, 2009 - John Pohl

North Pacific fisheries management is generally considered the standard for US waters, and is due in part to the use of Marine Protected Areas.

Sep 25, 2008 - John Pohl

Replacing and clearing a face mask is a key skill for a diver. Here is an exercise to help nervous students transition from pool drills to performance in open water.

Sep 19, 2008 - John Pohl

With rapid and radical degradation of marine ecosystems underway worldwide, there is an urgent search afoot for effective conservation tools to restore ocean health.

Aug 28, 2008 - John Pohl

Woods Hole Oceanographic Institution is wrapping up the design of a new submersible that will replace the venerable ALVIN.

Jul 31, 2008 - John Pohl

Early American naval forces relied heavily on privateers-privately owned warships commissioned by the government-during the American Revolution and War of 1812.

Jul 31, 2008 - John Pohl

As diving's popularity increases around the world, it is important that divers know the gas laws. Dalton's Law explains the danger of oxygen toxicity at depth.

Jul 30, 2008 - John Pohl

Diving's popularity is growing worldwide. But many new divers do not understand Boyle's Law - one of diving's most important gas laws - and what it means for them.

Jul 29, 2008 - John Pohl

Privateering was a vital part of the United States' early sea power, as well as an investment. Here is a look at its cost for investors.

Jul 29, 2008 - John Pohl

Salmon are the most recognizable Alaskan fish, but the bulk of Alaskan fisheries management focuses on groundfish.

Jul 24, 2008 - John Pohl

It is uncommon for sea turtles to range north of Oregon, but their appearance in Alaskan waters occurs often enough that they can't be considered accidental visitors.

Jul 24, 2008 - John Pohl

Sailing aboard the Hawaiian Chieftain on a windy day offers a glimpse into the world of yesteryear's wind-ship sailors.

Jul 23, 2008 - John Pohl

Thirty-two tall ships will visit San Francisco's waterfront this July as part of the West Coast's Tall Ship Challenge.

Jul 19, 2008 - John Pohl

July 3rd through July 7th, 2008 the skyline along Tacoma, Washington's waterfront will be pierced by the masts and spars of over thirty of the world's tall ships.

Jun 28, 2008 - John Pohl

Blue water sailors may exercise their minds and spirits on long sea voyages, but strenghth and cardio are another matter. Here's how to return to land fit

Apr 30, 2008 - John Pohl

Millions of years of evolutionary adaptation forged by mountain building and volcanism led to modern day salmon species, who in their turn survived an onslaught of ice.

Apr 26, 2008 - John Pohl

In the face of geological turmoil and climate change, ancient ancestors of today's Pacific Salmon took advantage of cooler, more productive oceans.

Apr 20, 2008 - John Pohl

Onchorhynchus's ancestors first appear in the fossil record 50 million years ago, offering a vital clue as to where this line of fish originated.

Apr 20, 2008 - John Pohl

North American salmon have survived tens of thousands of years of geological and climatic upheaval, leading them to evolve considerable genetic variation.

Apr 6, 2008 - John Pohl

Jellyfish inhabit all the world's oceans and are often seen by swimmers and beachcombers alike. Here is a simple, informative look at a fascinating creature.

Mar 23, 2008 - John Pohl

Coldwater diving near Alaska's capital city offers experienced divers plenty of wall diving, sea life, shipwrecks, and personal challenge.

Mar 10, 2008 - John Pohl

Salmon beware--a warm blooded relative of the white shark hunts the North Pacific, even as far north as the Bering Sea.

Feb 16, 2008 - John Pohl