How does relative humidity affect plant growth?
Similarly one may ask, how does humidity affect photosynthesis?
The effect of humidity on the rate of photosynthesis in a plant is very similar to that of water. If there is a lot of humidity in the air around the plant, less water from the plant evaporates. Because of this, the rate of photosynthesis increases as the humidity increases.
Also question is, how does humidity affect an ecosystem?
It increases with temperature and decreases with altitude (because cooler air is drier). Its main influence on terrestrial life is it's influence on precipitation and dew formation on water availability and the resulting effects on convection and evaporation of organisms.
The Affects of Humidity on Plants Relative humidity levels affect when and how plants open the stomata on the undersides of their leaves. When surrounded by warm temperatures in low relative humidity levels, transpiration rates in a plant increase, reducing the need for a grower to fertilize it.