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Lianas are taking over the rainforests, and it's visible from space

phys.org

1–10 of 43 posts

Re: Lianas are taking over the rainforests, and it's visible from space

#2
> He attributes this to rising atmospheric CO₂ levels. "All plants grow faster with more CO₂, but lianas benefit even more

And yet this extra growth all around because of co2 means that the will be more co2? This seems incoherent.

Pet peeve - if the article hooks you with a line like 'visible from space' they should provide the imagery so I can see for myself. But there's no picture.

Re: Lianas are taking over the rainforests, and it's visible from space

#3
post #2

> He attributes this to rising atmospheric CO₂ levels. "All plants grow faster with more CO₂, but lianas benefit even more And yet this extra growth all around because of co2 means that the will be more co2? This seems incoherent. Pet peeve - if the article hooks you with a line like 'visible from space' they should provide the imagery so I can see for myself. But there's no picture.

The previous paragraph explains it:

>Lianas are rapidly expanding their territory in tropical forests, sometimes suppressing tree growth entirely in certain locations. In such areas, forest regeneration halts, and carbon storage can decline by as much as 95%. "That's almost equivalent to deforestation," Visser says.

There's more more CO₂ in the atmosphere; so more lianas grow; they choke out the main tree body; so less CO₂ is absorbed; so there's more CO₂ in the atmosphere, _e.t.c._

Re: Lianas are taking over the rainforests, and it's visible from space

#4
post #2

> He attributes this to rising atmospheric CO₂ levels. "All plants grow faster with more CO₂, but lianas benefit even more And yet this extra growth all around because of co2 means that the will be more co2? This seems incoherent. Pet peeve - if the article hooks you with a line like 'visible from space' they should provide the imagery so I can see for myself. But there's no picture.

Came here for this … “Big foot caught on camera!!” - all text article …

Re: Lianas are taking over the rainforests, and it's visible from space

#5
post #2

> He attributes this to rising atmospheric CO₂ levels. "All plants grow faster with more CO₂, but lianas benefit even more And yet this extra growth all around because of co2 means that the will be more co2? This seems incoherent. Pet peeve - if the article hooks you with a line like 'visible from space' they should provide the imagery so I can see for myself. But there's no picture.

https://esajournals.onlinelibrary.wiley.com/doi/10.1002/ecy....

Figure 1

Re: Lianas are taking over the rainforests, and it's visible from space

#6
post #2

> He attributes this to rising atmospheric CO₂ levels. "All plants grow faster with more CO₂, but lianas benefit even more And yet this extra growth all around because of co2 means that the will be more co2? This seems incoherent. Pet peeve - if the article hooks you with a line like 'visible from space' they should provide the imagery so I can see for myself. But there's no picture.

I agree, wanted a pic.

But for CO2. Guess they didn't spell it out. If the Lianas kill the tree, and the Lianas absorb less CO2 than a tree, then even though there is an increase in Liana growth, there is also less tree growth, so net less CO2 absorbed.

Re: Lianas are taking over the rainforests, and it's visible from space

#7
post #2

> He attributes this to rising atmospheric CO₂ levels. "All plants grow faster with more CO₂, but lianas benefit even more And yet this extra growth all around because of co2 means that the will be more co2? This seems incoherent. Pet peeve - if the article hooks you with a line like 'visible from space' they should provide the imagery so I can see for myself. But there's no picture.

> And yet this extra growth all around because of co2 means that the will be more co2? This seems incoherent.

If trees die (because of the lianas) faster than they grow, it's not impossible at all.

Nature generally balances itself (with more CO2 getting balanced by more plant growth) on the long term, not necessarily on the short term.

Re: Lianas are taking over the rainforests, and it's visible from space

#8
post #2

> He attributes this to rising atmospheric CO₂ levels. "All plants grow faster with more CO₂, but lianas benefit even more And yet this extra growth all around because of co2 means that the will be more co2? This seems incoherent. Pet peeve - if the article hooks you with a line like 'visible from space' they should provide the imagery so I can see for myself. But there's no picture.

Small statistical deviations on satellite imagery isn’t necessarily very sexy for popular science. Especially when it’s in the non visible light spectrum, Landsat and Sentinel-2 satellites have bands that are great for analysing vegetation, but they are not very beautiful when converted to colours visible to humans.

A quick check from the referenced papers only mention a 2008 dataset from Landsat in a meta analysis. And no fancy pictures to look at.

Re: Lianas are taking over the rainforests, and it's visible from space

#9
> The leaves that make lianas ultra-efficient reflect more light and infrared radiation than tree foliage.

> "Tree leaves tilt, allowing light to reach lower neighbors—even the forest floor gets some sunlight. But lianas leave almost nothing for others."

But that seems like a mechanism that could help reduce rising temperature

Re: Lianas are taking over the rainforests, and it's visible from space

#10
post #5
post #2

> He attributes this to rising atmospheric CO₂ levels. "All plants grow faster with more CO₂, but lianas benefit even more And yet this extra growth all around because of co2 means that the will be more co2? This seems incoherent. Pet peeve - if the article hooks you with a line like 'visible from space' they should provide the imagery so I can see for myself. But there's no picture.

https://esajournals.onlinelibrary.wiley.com/doi/10.1002/ecy.... Figure 1

I don't think that really counts as a "picture from space" in common parlance, but I guess maybe a picture from Euclidean space?
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