The organisms living in the habitat will eventually perish(die).
They're populatioon would grow rapidly
What would happen next if sagebrush is disappeared frrom a desert?
You would die.
You would die.
if the oxygen
Everything would die
There would be no bees to pollenate the flowers.
If cordgrass were to disappear, it would disrupt the ecosystem as it serves as a critical habitat and food source for various organisms. This could lead to a decline in biodiversity, affecting the overall health of the ecosystem. Additionally, the absence of cordgrass could also impact shoreline stability and coastal erosion.
This cannot possibly happen, so asking what would happen if it did happen is an exercise in stupidity.
life would follow
Although it is a hypothetical situation. If all the green plants will disappear from earth then it will cause a decrease in the concentration of the oxygen to such a low level that it would not be sufficient for all the living organisms for breathing. Thus, it will result in their death.
know one knows. because we would all be frozen.