Elevated CO2 levels would
increase photosynthesis but this could lead to forests which could support higher numbers of insects.
Vaughan Pratt — if I understand your objections above you assert that forest can
increase photosynthesis while they decrease transpiration.
Models suggest that incorporating the new enzymes into wheat could
increase photosynthesis by up 20 % under some field conditions.
The action of damselfish swimming between coral branches helps the algae inside corals to
increase their photosynthesis
The presence of fish
increased photosynthesis by 22 per cent.
Warming temperatures, increased atmospheric CO2, and longer growing seasons provide opportunities for
increased photosynthesis, thereby improving forest growth and productivity (Ehleringer and Cerling 1995; Joyce and Birdsey 1995; Waring and Running 2007; NPS 2010).
So, by
increasing photosynthesis on earth by one - third, as much additional energy will be absorbed by plants as is released by all human activity.
Elevated CO2 could benefit crops yields in short term by
increasing photosynthesis rates, however, there is big uncertainty in the magnitude of the CO2 effect and that interactions with other factors.
Furthermore in contrast to researchers arguing rising atmospheric CO2 will inhibit calcification,
increased photosynthesis not only increases calcification, paradoxically the process of calcification produces CO2 and drops pH to levels lower than predicted by climate change models.
It makes complete sense that increased transpiration would permit
increased photosynthesis.
That would be understandable when increased transpiration is the cause of
increased photosynthesis.
Saleska, Didan, et al theorize that drought increases sunlight which
increases photosynthesis.
But why do you believe it is still true when increased sunlight is the cause of
increased photosynthesis?
The combination of deployment of the MODIS satellites starting in 1998 and a widespread drought in the Amazon during July - September 2005 would appear to have provided the first opportunity for ecologists to observe an alternative cause of
increased photosynthesis besides increased transpiration.
Others believe that much of it may be converted by
increased photosynthesis, both from terrestrial plants and marine phytoplankton.
Surely we could somehow take all of the post industrial Co2 (some 200 billion tonnes so far released sinece 1850) out of the air by
increasing photosynthesis in order to get rid of it?
And, even if
increasing photosynthesis could reduce atmospheric CO2 levels, what do you do with the new biomass?
Not exact matches
In a 2016 article in Science, one of us (Stephen Long) and colleagues at other institutions demonstrated that improving the efficiency of
photosynthesis in tobacco
increased its growth by 20 percent.
Taken together, the research data provides a picture, from the leaf scale to the global scale, suggesting that droughts in the Amazon basin are affecting levels of carbon dioxide in the atmosphere globally, both on a short - term basis though decreasing
photosynthesis and on a longer term basis, by
increasing tree mortality.
The simulations suggested that the indirect effects of
increased CO2 on net primary productivity (how much carbon dioxide vegetation takes in during
photosynthesis minus how much carbon dioxide the plants release during respiration) are large and variable, ranging from less than 10 per cent to more than 100 per cent of the size of direct effects.
Intriguingly, between September 1997 and August 2000, the team found, global plant
photosynthesis increased.
Increased levels of CO2 accelerate plant growth, which causes more absorption of CO2 through
photosynthesis.
«If you isolate a leaf [in a laboratory] and you
increase the level of CO2,
photosynthesis will
increase.
But why
photosynthesis continued to
increase after that remains a topic for further investigation.
«A higher concentration of carbon dioxide in our atmosphere would aid
photosynthesis, which in turn contributes to
increased plant growth,» Rep. Lamar Smith (R — Texas) wrote in an op - ed last year.
Processes like
photosynthesis or microbial oxidation serve to «fractionate» the isotopes,
increasing the proportion of carbon - 12, which then gets translated to the emitted gas.
Although natural
photosynthesis plays a vital role in absorbing and «fixing» carbon dioxide emitted from fossil fuel use, it has not prevented the net
increase of this gas in the atmosphere since the Industrial Revolution.
In the most recent (December 2003) issue of Progress in Oceanography, researchers suggest this whopping
increase was caused by a sudden influx of dead algae rich in carotenoids, pigments used by some plants for
photosynthesis.
[Ralph F. Keeling et al., Atmospheric evidence for a global secular
increase in carbon isotopic discrimination of land
photosynthesis]
This was achieved by
increasing the brightness of the lights over the plants,
increasing the rate of
photosynthesis.
Satellite data showed that the
increase coincided with a «greening» of the rainforest, or an
increase in fresh leaves, leading researchers to suspect the moisture might be water vapor released during
photosynthesis.
This map shows the total
increase of
photosynthesis and carbon uptake by forests caused by all hurricanes in 2004.
Now, a new study from Barros reveals that the
increase in forest
photosynthesis and growth made possible by tropical cyclones in the southeastern United States captures hundreds of times more carbon than is released by all vehicles in the U.S. in a given year.
For many crops more carbon dioxide means a rise in the rate of
photosynthesis and, therefore, in growth; and with
increased carbon dioxide some plants» use of water is more efficient, according to studies done in conventional glass greenhouses.
One of the most interesting findings was that stomatal pores on the surface of the leaf (small holes that control the uptake of CO2 for
photosynthesis and the loss of water vapour)
increase in number after multi-generation exposure to future CO2.
«How plants avoid sunburn: Findings could lead to crops with
increased protection from bright light and enhanced
photosynthesis.»
Doubling of the carbon dioxide concentration will cause global plant
photosynthesis to
increase by about one third, according to a paper published in the journal Nature.
It's long been known that as levels of CO2 in the atmosphere rise, plants can
increase their rate of
photosynthesis.
It is widely accepted that plant
photosynthesis will
increase with carbon dioxide, so long as nutrients, such as nitrogen and phosphorus, are not limiting.
This land carbon sink is believed to be in part due to
increases in
photosynthesis.
As oxygen
increased in Earth's atmosphere and organisms became more complex, different forms of metabolism evolved, from plants»
photosynthesis to the lesser - known chemolithotrophy.
Global Earth System Models (ESMs) all predict that global
photosynthesis will
increase with carbon dioxide, but they differ by a factor of three in the size of this «CO2 fertilization».
The overall entropy of the universe
increases during
photosynthesis as the sunlight dissipates, even as the plant prevents itself from decaying by maintaining an orderly internal structure.
Because plants take up CO2 during
photosynthesis, it has long been assumed that they will provide a large carbon «sink» to help offset
increases in atmospheric CO2 caused by the burning of fossil fuels.
During the dry season, with no fog layer to reflect sunlight, the smaller cloud cover allows plants to receive much higher radiation,
increasing evaporation and
photosynthesis rates, another process missed by the GCMs.
«Because these plants are photosynthetic, it's not surprising to find that as the amount of sea ice cover declined, the amount of [
photosynthesis]
increased,» says biological oceanographer Kevin Arrigo of Stanford University's School of Earth Sciences, who led an effort to use the MODIS (Moderate Resolution Imaging Spectroradiometer) devices on NASA's Terra and Aqua satellites to determine changes in phytoplankton growth.
Professor Neil Hunter from the University of Sheffield's Department of Molecular Biology and Biotechnology and lead author of the study, said: «
Photosynthesis is the major source of energy for all life on Earth, so it is important to learn the limits of this process so we can understand how to increase spectral coverage and to improve the efficiency of photosyn
Photosynthesis is the major source of energy for all life on Earth, so it is important to learn the limits of this process so we can understand how to
increase spectral coverage and to improve the efficiency of
photosynthesisphotosynthesis.»
The drought sensitive cultivar» 1110» benefited from the AM fungi under drought conditions, resulting in
increased biomass, improved
photosynthesis and improved nitrogen - use.
Using infra - red gas analysers connected to a miniature controlled environment chamber, Dr Samuel Taylor and Professor Steve Long, at the Lancaster Environment Centre (LEC) simulated a sudden
increase in sunlight following shade, and measured the time it took for the plant to regain its maximum
photosynthesis efficiency and take full advantage of the extra energy from light.
One latent possibility to solve this problem is
increasing the efficiency of
photosynthesis.