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Phytoplankton Population Drops 40 Percent Since 1950 (2010)

138 点作者 yusufaytas将近 6 年前

12 条评论

radford-neal将近 6 年前
The referenced paper is from 2010. Do you suppose that the reason you haven&#x27;t been hearing more about this recently is that it&#x27;s just wrong?<p>In 2011, this comment disputing it was published:<p><a href="https:&#x2F;&#x2F;www.nature.com&#x2F;articles&#x2F;nature09950" rel="nofollow">https:&#x2F;&#x2F;www.nature.com&#x2F;articles&#x2F;nature09950</a><p>The paper was discussed on HN earlier, as part of the discussion of<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=19127911" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=19127911</a><p>I have a comment there pointing out that if you actually look at the data in the paper, there is really no evidence of a decline.
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pygy_将近 6 年前
[2010], here&#x27;s the paper referenced in the article: <a href="https:&#x2F;&#x2F;www.nature.com&#x2F;articles&#x2F;nature09268" rel="nofollow">https:&#x2F;&#x2F;www.nature.com&#x2F;articles&#x2F;nature09268</a><p>I knew we had fucked up the oceans with plastics and overfishing, but I didn&#x27;t know that phytoplankton was down as well, at such a scale. Per TFA, it provided 50% of the Earth&#x27;s photosynthesis (in 2010). If it kept on dwindling that fast, that share is even lower now (down ~45%, with a half-life of 81 years, assuming the decline was constant between 1950 and 2010). This is also freaky knowing that it is the base of the food chain in the oceans...<p>I don&#x27;t have any idea of the amount of oxygen that&#x27;s cycled each year vs the total amount in the atmosphere... I suppose there&#x27;s no immediate danger on that end, even if it were to drop to an even lower point before recovering, otherwise we&#x27;d have heard of this more often...
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geedy将近 6 年前
I am not associated with any of the following, but there are organizations attempting to build devices that will bring colder, nutrient rich waters to the surface to cause phytoplankton blooms (or use the same nutrients for seaweed farming):<p>1) ocean-based.com 2) <a href="http:&#x2F;&#x2F;www.climatefoundation.org&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.climatefoundation.org&#x2F;</a><p>We should of course do everything we can to stop emitting carbon. But projects like these may an important part in our future.
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chiefalchemist将近 6 年前
&gt; The tiny organisms, known as phytoplankton, also gobble up carbon dioxide to produce half the world&#x27;s oxygen output—equaling that of trees and plants on land.<p>So does this mean there&#x27;s been a significant drop in oxygen (produced)? And if so, how much?<p>If 100% of phytoplankton produces 50% of the oxygen and 100% is now 60% that mean 50% of oxygen is down to 30%. In other words, sans a drop in non phytoplankton, total oxygen that was 100% is not 80%?<p>Wouldn&#x27;t we feel that?
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jes5199将近 6 年前
Are we doomed? It seems like we might be doomed
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mietek将近 6 年前
(2010)
mistrial9将近 6 年前
rumors of this were spread in certain environmentalist communities in the late 1980s, with less certainty, and were widely accompanied by dread, sorrow and a feeling of being overwhelmed. The gut-sense was that toxics, plastics, human activity and at that time, missing ozone layer, had broken or was about to break, some balance point in the top few feet of saltwater, where a huge amount of the vital activity lie.<p>Now, thirty years later, the ability to measure and predict is much greater, such that science literature can put a finer point on things. Yet the overall pollution activity (minus the success of the ozone layer repletion, worse with single-use plastics) continues.<p>Like the therapist says, you own your reaction to this.. hard to dismiss...
eklavyaa将近 6 年前
coincidentally I watched Our Planet High Seas episode today. They showed how crucial Phytoplankton is. No matter where you are in world the air you are breathing is somewhere coming from these microscopic plants. This fact made me stop and think even these tiny organisms contributing to make earth habitable, What we do as human beings ?
algaeontoast将近 6 年前
This should be more troubling than dwindling forest and marshland.
schainks将近 6 年前
Are there any teams trying to genetically engineer phytoplankton to deal with these changes in ocean conditions?
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qwerty456127将近 6 年前
Not in the lakes near me. These are so damn green right now...
patientplatypus将近 6 年前
You know there are a lot of people who think we&#x27;re going to die from global warming but I always figured the food web will just collapse. Like one year all the harvests stop working. Could be the missing bees and insects or the soil exhaustion or the heat. Or just that plastic is in the water supply. Heck, we just found out a few days ago that larger amounts of CO2 in the atmosphere actually makes rice less nutritious. But by then the reasons won&#x27;t matter and people will just start killing each other over food.
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