FARMing With Data - OpenET Launches New Tool For Farmers and Ranchers
--
https://www.nasa.gov/centers-and-facilities/ames/ames-science/farming-with-data-openet-launches-new-tool-for-farmers-and-ranchers/ <-- shared NASA article
--
https://etdata.org/ <-- shared OpenET home page
--
#GIS #spatial #mapping #OpenET #FARMing #spatialdata #spatialanalysis #spatiotemporal #farmers #agriculture #water #hydrology #NASA #USGS #waterresources #ET #evaporation #transpiration #efficiency #weather #climate #evapotranspiration #model #modeling #planning #conservation #sustainability #remotesensing #earthobservation #management #satellite #watermanagement
@USGS @nasa

Dry Plants Warn Away Moths

Drought-stressed plants let out ultrasonic distress cries that moths use to avoid plants that can’t support their offspring. In ideal circumstances, a plant is constantly pulling water up from the soil, through its roots, and out its leaves through transpiration. This creates a strong negative pressure — varying from 2 to 17 atmospheres’ worth — inside the plant’s xylem. If there’s not enough water to keep the plant’s inner flow going, cavitation occurs — essentially a tiny vacuum bubble opens in the xylem. That cavitation isn’t silent; it creates a click at ultrasonic frequencies above human hearing. But just because we don’t hear it doesn’t mean that sound goes unheard.

In fact, recent research suggests that, not only do moths hear the plant’s cavitation cries, female moths will avoid laying eggs on a healthy plant that sounds like it’s cavitating. Evolutionarily, this makes sense. Hatchlings rely on their birth plant for food and habitat; if an adult moth picks a dying, drought-stressed plant, its offspring won’t survive. It pays to be sensitive to the plant’s signs of distress. (Image credit: Khalil; research credit: R. Seltzer et al.; via NYTimes)

In our new paper we question the conventional understanding that #diffusional limitations of CO2 contribute to the reduction in #photosynthesis at high #temperatures. We suggest that #stomata and #mesophyll membranes could work strategically to facilitate #transpiration cooling and #CO2 supply, thus alleviating #heat #stress on leaf photosynthetic function, albeit at the cost of reduced #WateUseEfficiency.

https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.19558

At the end of the day, a soul repairing walk amongst the trees on the banks of the River Ness. #transpiration

Dry air affects #tree #functioning and #mortality: An abundance of evidence suggests that stomatal conductance declines under high water vapor pressure deficit (#VPD) and #transpiration increases in most species up until a given VPD threshold, leading to a cascade of subsequent impacts including reduced photosynthesis and growth, and higher risks of carbon starvation and hydraulic failure. https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.16485

Was sind Eure #Libelingssportarten?