Category Archives: Oceans

Climate Change dominates news coverage at expense of other equally important existential issues

Preface. I’ve noticed that in the half dozen science magazines and several newspapers I get practically the only environmental stories are about climate change. Yet there are 8 other ecological boundaries (Rockström 2009) we must not cross (shown in bold … Continue reading

Posted in Acidification, Biodiversity Loss, BioInvasion, Climate Change, Critical Thinking, Peak Oil, Planetary Boundaries | Tagged , , , , , , , | 17 Comments

World’s Oceans are losing Oxygen rapidly

Preface. Yikes, add deoxygenization to your list of worries. Oxygen levels in the world’s oceans declined by roughly 2% from 1960 and 2010. The decline was largely due to climate change, though other human activities such as nutrient runoff from … Continue reading

Posted in Climate Change, Climate Change, Extinction, Mass Extinction | Tagged , , | 7 Comments

Why and how Jellyfish are taking over the world

Preface.  The more climate change kicks in, the more we over-fish, pollute, acidify and warm the ocean, create vast dead zones, and trawl ocean bottoms, the better the jellyfish do. It is quite possible that the ocean ecosystem will shift … Continue reading

Posted in Books, Extinction, Fisheries, Jellyfish, Peak Food | Tagged , | 4 Comments

Deep-sea trawling harms biodiversity and carbon storage

Preface. Overfishing has eliminated 90% of the world’s large predatory fishes and is devastating marine ecosystems. Bottom trawling is one of the most devastating ways our oceans are being overfished, degraded and biodiversity destroyed .  This industry tossed 437 million … Continue reading

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Toxic algae slime spreading quickly across the earth

2017-8-19. Ocean Slime Spreading Quickly Across the Earth. Craig Welch, National Geographic. Toxic algae blooms, perhaps accelerated by ocean warming and other climate shifts, are spreading, poisoning marine life and people. When sea lions suffered seizures and birds and porpoises … Continue reading

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Oceans in danger: excessive fishing, pollution, bioinvasion, acidification, oil spills, eutrophication

Carl Safina, Sarah Chasis. 9 Oct 2004.  Saving the Oceans. Two major commissions have proposed far-reaching reform of ocean policy. It’s time for Congress to act. Issues in Science & Technology. National Academy of Sciences. Oceans have been suffering from … Continue reading

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Phytoplankton have declined 40%: they provide food and oxygen for all creatures on Earth

This article from NewScientist discusses how phytoplankton are disappearing — and they provide half of the food animals both in the ocean and on land depend on, plus produce a great deal of the oxygen we breathe. Throw in overfishing, … Continue reading

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Dying seagrass is releasing massive amounts of carbon dioxide

23 May 2012. Mowing down seagrass meadows will cut loose carbon. NewScientist. SEagrass has as much carbon as the world’s forests and the carbon dioxide contained in them could be released as they are dying off from water pollution, dredging, … Continue reading

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Acidification of our oceans: unprecedented rate in past 300 million years

Ahmed, Nafeez. 2017. Failing States, Collapsing Systems BioPhysical Triggers of Political Violence. Springer. As climate change is accelerating, so is the acidification of the oceans. The two processes are causally related. Oceans are becoming more acidic because the vast bulk … Continue reading

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Fishery destruction

From increased carbon dioxide By the end of this century, carbon dioxide levels in the ocean are likely reach levels that will interfere with fishes’ ability to escape from predators, hear, and smell.  Carbon dioxide is already affecting fish brains … Continue reading

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