Rhizosphere allocation by canopy-forming species dominates soil CO 2 efflux in a subarctic landscape

By Thomas C. Parker et al. Abstract In arctic ecosystems, climate change has increased plant productivity. As arctic carbon (C) stocks are predominantly located below ground, the effects of greater plant productivity on soil C storage will significantly determine the net sink/source potential of these ecosystems, but vegetation controls on soil CO2 efflux remain poorly 

Continue Reading…

The ocean captures twice as much carbon dioxide as previously thought

By Sara Rigby Without the ocean’s ‘biological carbon pump’, atmospheric carbon levels would be much higher. The oceans’ ‘biological pump’ is capturing even more carbon dioxide than previously thought, a study finds. Phytoplankton on the surface of the ocean absorb carbon dioxide, and are eaten by zooplankton, carrying the CO2 deeper into the ocean. The levels 

Continue Reading…

Effects of elevated CO2 on competition between native and invasive grasses

By Heather Hager et al. Abstract Elevated atmospheric CO2 concentration increases the performance of invasive plants relative to natives when grown in monoculture, but it is unclear how that will affect the relative competitive abilities per se of invasive and native grasses grown together. We tested competitive outcomes for four native and four invasive perennial 

Continue Reading…

The Influence of Elevated CO2 on Canola Blackleg Disease

Paper Reviewed Zou, Z., Liu, F., Chen, C. and Fernando, W.G.D. 2019. Effect of elevated CO2 concentration on the disease severity of compatible and incompatible interactions of Brassica napus-Leptosphaeria maculans pathosystem. Plants 8: 484, doi:10.3390/plants8110484. Writing as background for their study, Zoe et al. (2019) note that “plant disease symptoms in pathosystems are influenced by, 

Continue Reading…

The Photosynthetic Response of Jicama to Elevated CO2

Paper Reviewed Ravi, V., Pushpaleela, A., Raju, S., Gangadharan, B. and More, S.J. 2019. Evaluation of photosynthetic efficiency of yam bean (Pachyrhizus erosus L.) at saturating photon flux density under elevated carbon dioxide. Physiology and Molecular Biology of Plants 26: 189-194. The Mexican yam bean, or jicama (Pachyrhizus erosus), is an important edible legume that 

Continue Reading…

Early growth phase and caffeine content response to recent and projected increases in atmospheric carbon dioxide in coffee (Coffea arabica and C. canephora)

By Fernando E. Vega et al. Abstract While [CO2] effects on growth and secondary chemistry are well characterized for annual plant species, little is known about perennials. Among perennials, production of Coffea arabica and C. canephora (robusta) have enormous economic importance worldwide. Three Arabica cultivars (Bourbon, Catimor, Typica) and robusta coffee were grown from germination 

Continue Reading…

Bursting bubbles clear the way for desalination

Carbon dioxide bubbles could be a fast and environmentally friendly way to unclog seawater filters and keep the supply of drinking water flowing. Growing populations are increasing the global demand for drinking water, but natural sources of freshwater are shrinking. Extremely arid countries, such as Saudi Arabia, increasingly depend on desalinated seawater. The most effective 

Continue Reading…