Jellyfish population boom

Applying the Dharma for the preservation of planet Earth and its inhabitants
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Kim O'Hara
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Jellyfish population boom

Post by Kim O'Hara » Sat Jan 05, 2019 9:47 pm

Something that's amplified by climate change and pollution and sometimes over-fishing - our actions in all three cases.
Jellyfish are causing mayhem as pollution, climate change see numbers boom

...In places like Sweden, Israel, the US and the Philippines, power plants have been affected by blooms of jellyfish.

"So many jellyfish were swept into the power system … that it shut down the power system through much of this one island in the Philippines," Ms Berwald says. ...

"One jellyfish scientist from Japan told me that the first threat to the electric system in Japan is earthquakes, but the second is jellyfish," Berwald says.

"We are dealing with a ubiquitous creature."

A human cause

Some scientists think jellyfish numbers are increasing as the climate changes — the creatures reproduce well in warmer waters.

Jellyfish also fare better than many other sea creatures in polluted waters, as they don't need much oxygen.

Berwald says that can give them the upper hand over predators.

"They can sort of slip into polluted waters, into low oxygen waters, and hide from predation there better than a fish that has a higher oxygen demand," she says. ...

Overfishing is also part of the story.

"There's a situation in Namibia ... where there was uncontrolled illegal fishing for many, many years, so it depleted the ecosystem," Berwald explains.

"Then there was a sort of warming that happened … and it allowed these two jellyfish to come into the ecosystem there.

"[Jellyfish] numbers have proliferated so much that when fisherman fish there now they will get two to three times the [mass weight] of jellyfish to fish."

Many scientists don't think the ocean ecosystem can revert back to what it was, and it's unclear as to whether fish can come back to rebalance the system.

"It's a really terrible situation because the region used to be one of the richest fishing grounds in the world," Berwald says. Depleted fish stocks have also affected other animals in the area that rely on fish for their diet.

"There's stories that seals and birds are actually starving there because there aren't enough fish left to eat," Berwald says. ...
https://www.abc.net.au/news/2019-01-06/ ... h/10377112

:jawdrop:
Kim

chownah
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Re: Jellyfish population boom

Post by chownah » Thu Jan 10, 2019 1:18 pm

The greatest cause of an explosion in the jellyfish population is over-fishing....not climate change.
chownah

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Kim O'Hara
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Re: Jellyfish population boom

Post by Kim O'Hara » Thu Jan 10, 2019 9:56 pm

chownah wrote:
Thu Jan 10, 2019 1:18 pm
The greatest cause of an explosion in the jellyfish population is over-fishing....not climate change.
chownah
I suspect that statement is correct in some areas but not in others.

Your statement on its own does not outweigh a well-researched, science based, report from a credible news organisation, so you need to back it up before anyone is likely to believe you.

:namaste:
Kim

chownah
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Re: Jellyfish population boom

Post by chownah » Fri Jan 11, 2019 1:42 am

Kim O'Hara wrote:
Thu Jan 10, 2019 9:56 pm
chownah wrote:
Thu Jan 10, 2019 1:18 pm
The greatest cause of an explosion in the jellyfish population is over-fishing....not climate change.
chownah
I suspect that statement is correct in some areas but not in others.

Your statement on its own does not outweigh a well-researched, science based, report from a credible news organisation, so you need to back it up before anyone is likely to believe you.

:namaste:
Kim
Is there an area in the ocean which is not overfished?......all of the evidence I have seen is that every fisherie in the world is declining do to overfishing. Over fishing is a result of over population of the world....too many people for the ocean to support.

The quote from the well-researched, science based, report from a credible news organisation which you present contains just this one quote mentioning climate change:
Some scientists think jellyfish numbers are increasing as the climate changes — the creatures reproduce well in warmer waters.
Seems like pretty thin support for climate change as being the culprit with it being presented as some opinions without anything to support those opinions.....on the other hand the entire rest of the part of the article which you support talks about other things. Seems like alot more support for other things than for climate change.

(A side note: climate change is caused by overpopulation too.......seems like the big problem here is overpopulation.....I'm wondering why the excerpt doesn't mention overpopulation.)
chownah

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