The data in the graph to the right were collected in a seasonally dry, tropical
ID: 158239 • Letter: T
Question
The data in the graph to the right were collected in a seasonally dry, tropical forest that receives an average of 1500 mm of precipitation y?1, mostly in the wet season. The dotted curve represents the general trend reflected by the open circles (wet season data). Below this, the solid curve represents the general trend reflected by the closed circles (dry season data). Use this information and class information to respond to the following questions.
a) Explain why forest transpiration generally increases as X axis values increase.
2.5 2.0 1.5 1.0 o Wet seaso . Dry season 2 0.5 0.00 0.25 0.50 0.75 100 VPD (kPa)Explanation / Answer
Rates of transpiration will vary with vapour pressure decit.Small increases in temperature can increase vapor pressure deficit (VPD) which will increase tree water use.During summer, vpd increases causing more Transpiration.Transpiration is a diffusion operation. As more VPD is there , it drives out water from plant leaves.
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