Citat:
Ursprungligen postat av
humanlife
Det ser illa ut för fisken. Haven har blivit varmare, surare och syrefattigare.
Fish are in trouble with the climate crisis, IPCC report finds
(CNN)Since the 1970s, the climate crisis has made our oceans warmer and more acidic, reducing the number of fish we rely on for our food and putting the future of fish in peril, according to a major UN report out Wednesday.
Eh, nej?
För det första:
"has been reported by Hofmann, et al., 2011, that the natural daily and seasonal range of pH in the oceans is much larger than model predictions of future changes in pH"
Sen har vi denna studien på sill:
"the end, the researchers found that the young herring in the mesocosms exposed to elevated CO2 levels had a survival rate that was nearly 20 per cent higher than the herring in the control mesocosms"
Citat:
Rising temperatures mean oceans will have less oxygen, and this, along with more heatwaves and increased acidification, will make fish move further away from the coast and create larger deadzones, where life cannot survive.
Havet är ~pH 8. Det blir mer neutralt om co2 sänker pH, det är inte "acidification". Fake science.
Citat:
Ocean warming this century has contributed to an "overall decrease in maximum catch potential." Overfishing makes the issue worse, the Intergovernmental Panel on Climate Change (IPCC) report said.
Scientists are "virtually certain" that the ocean has warmed between 1970 and 2017.
De kan vara hur säkra de vill, för det finns mätningar på de senaste 20 åren och de visar +0.04°C. Det är likställt med 0°C. Vi har inte sådan noggrannhet i mätningarna.
Att du inte ens reagerar på att de säger "
virtually certain" är ju talande. Fattar du inte att det betyder att de saknar bevis?
Citat:
Marine heatwaves, periods of extremely high ocean surface temperatures, have "very likely" doubled in frequency from 1982 to 2016, according to the report, lasting longer and becoming more intense due to the climate crisis.
"Very likely". Du verkar inte ens notera orden? Det betyder *no evidence*.
Citat:
Warmer waters hold less oxygen, and fish need that oxygen to survive. Warmer waters also lead to algae blooms, red tides that further decrease oxygen, and kill sea life. A ride tide triggered a state of emergency in Florida in 2018, killing thousands of animals and costing the state millions. The toxin created by the algal blooms can also make shellfish poisonous to humans.
90% av havsvolymen håller <3°C, där finns massor av syre. Östersjön och liknande grunda vikar får syrebrist fläckvis ibland, det har de alltid fått.
Citat:
Warmer waters endanger coral reefs that are homes to many fish. Foundation species, meaning fish food, also decline.
“An amazing example of coral resilience has been found in the Gulf of Aqaba, west of the Arabian mainland. Specimens of the coral there have been placed into tanks where they are exposed to rising temperatures and sub-optimal pH levels. Scientists reported that most of the variables measured, such as energy metabolism or the building of a skeleton were actually improved. One explanation for these surprising results where such corals are observed in the stress tests to be not only surviving, but thriving, is that coral in the Gulf of Aqaba is highly evolved due to historical extreme changes in the climate of the region. "
"Associate Professor David Suggett suggests that events such as these teach us that corals are surviving in waters that are really hot, very acidic and have very little oxygen. He reminded his 40 person audience that these are the same conditions that have been predicted under climate change.”
http://www.royalsocietyhighlands.org.au/report%20of%2021%20June%202018.pdf
Citat:
It's "virtually certain" that the ocean has taken up between 20-30% of the total human produced carbon since the 1980s, changing the very chemistry of the ocean, making it more acidic, the IPCC report found.
Återigen, pH8 är inte "acidic". Det är basiskt.
Citat:
Acidification eats away at the shells of some mollusks. The change in the ocean's pH makes carbonate ions less abundant. Oysters, mussels, clams, and other animals need these ions to build up their shells. The acidification also hurts creatures like calcareous plankton that many fish rely on for food
Ocean acidification has already caused massive die-offs of oysters in the Pacific Northwest.
Här i Skandinavien har ostron vandrat in istället. Och även om haven är långt ifrån någon "acidification", så kan tydligen sniglar bygga starkare skal av lägre pH:
Now, scientists studying sea snails have discovered an unexpected side effect of this acid brew—it can help some of them build thicker, stronger shells by making their food more nutritious.
Ajajaj, där har vi problemet. CNN är en ökänt usel källa. När de refererar till IPCC är de som sämst. Du borde reagerat på alla "weasel words".
