Der steigende Meeresspiegel vernichtet Ackerland an der Küste doppelt so schnell wie Wälder, trotz der Bemühungen der Landwirte, Deiche zu bauen. Eine neue Studie zeigt, dass über 25.000 Hektar Ackerland im mittleren Atlantik durch das Eindringen von Salzwasser verloren gegangen sind, da einjährigen Nutzpflanzen die Widerstandsfähigkeit von Bäumen fehlt.
https://www.nature.com/articles/s41893-026-01835-6
4 Kommentare
Mother Nature scoffs at your levees.
She figured out the physics and developed a brilliant forest solution to shoreline stabilization. The technique is called natural selection.
Saltwater intrusion into groundwater is something I’ve learned about recently.
Mostly due to wells pulling water out of the ground, but also due to storm surges raising sea levels.
Pulling water out of low-lying coastal ground creates a void, that if sufficiently large, causes saltwater to flow inwards (underground) increasing the salinity of the ground water. This is a slow process.
The higher the sea level, over the long term (counting short-term events that cause dramatic increases during storm surges)… the higher the sea level the higher the pressure pushing in. More saltwater intrusion.
Of course hurricanes that dump lots of salt water on the ground rapidly increase salinity.
This is a big problem on the Delmarva peninsula right now.
The land doesn’t have to stay flooded long-term to be lost as cropland; just the occasional saltwater dunk can make soil too alkaline for most crops.
Levees and seawalls are far too expensive to be widely used to protect agricultural land. The most successful, sustainable, efforts to date have been restoring dunes, wetlands, and native vegetation to create buffer zones between cropland and the water.
This is why Bangladesh is having so many issues.