Articles written by John Pohl
Showing 30 Articles
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NOAA's New Navigator
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.
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Break Into Marine Biology the Hardy Way
Contracting as a fisheries observer is one way to earn valuable experience, both professionally and personally. It is as much a job of character as scientific know-how.
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Climate Change and Discovery's Deadliest Catch
Discovery Channel's program, Deadliest Catch, showcases commercial fishing. The real untold story behind Bering Sea fishing, however, is changing climate.
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The Marine Biologist's Worldview
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.
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Biologists, Business, and Biodiversity
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.
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Marine Biodiversity And Ecological Services
Historically, humans have valued the goods provided by marine ecosystems - yet failed to see the valuable planetary life support services those same ecosystems provide.
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Marine Biodiversity And Ecosystem Adaptability
Marine ecosystems with a range of species and healthy populations prove most resilient and adaptable to environmental change. Here's why.
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Marine Protected Areas Improve Alaskan Fisheries
North Pacific fisheries management is generally considered the standard for US waters, and is due in part to the use of Marine Protected Areas.
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Prepare For Those First Open-Water Mask Drills
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.
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What Is A Marine Reserve?
With rapid and radical degradation of marine ecosystems underway worldwide, there is an urgent search afoot for effective conservation tools to restore ocean health.
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Woods Hole's New Deep-Diving Submersible
Woods Hole Oceanographic Institution is wrapping up the design of a new submersible that will replace the venerable ALVIN.
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Patriotism and Profit: The American Privateers
Early American naval forces relied heavily on privateers-privately owned warships commissioned by the government-during the American Revolution and War of 1812.
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Scuba Diving With Dalton
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.
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Scuba Diving with Boyle
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.
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Outfitting The Early American Privateers
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.
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How Are Alaskan Groundfish Managed?
Salmon are the most recognizable Alaskan fish, but the bulk of Alaskan fisheries management focuses on groundfish.
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Sea Turtles in Southeast Alaska
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.
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Adventure Sail On The Hawaiian Chieftain
Sailing aboard the Hawaiian Chieftain on a windy day offers a glimpse into the world of yesteryear's wind-ship sailors.
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2008 San Francisco Festival Of Sail
Thirty-two tall ships will visit San Francisco's waterfront this July as part of the West Coast's Tall Ship Challenge.
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2008 Tacoma Tall Ship Festival
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.
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How Sailors Can Stay Fit At Sea
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
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Modern Salmon And The Ice Age
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.
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Salmon Versus Mountains
Millions of years worth of mountain building along North America's coast most likely forced early salmonids to develop age classes and straying so as to survive.
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Pacific Salmon Develop Anadromy
In the face of geological turmoil and climate change, ancient ancestors of today's Pacific Salmon took advantage of cooler, more productive oceans.
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The Salmon's Ancient Origins
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.
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The Genetic Variation of Salmon
North American salmon have survived tens of thousands of years of geological and climatic upheaval, leading them to evolve considerable genetic variation.
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Jellyfish--Planktonic Predator
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.
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Scuba Diving in Juneau, Alaska
Coldwater diving near Alaska's capital city offers experienced divers plenty of wall diving, sea life, shipwrecks, and personal challenge.
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North Pacific Salmon Sharks
Salmon beware--a warm blooded relative of the white shark hunts the North Pacific, even as far north as the Bering Sea.
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Problem Solve and Reduce Stress
Stress is a common problem in today's world. It doesn't need to be that way--many worries can be defeated with just a pen and paper and a little thought. Here's how.
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