Water Use Efficiency by Mangroves in The Guánica Dry Forest Reserve
MetadataShow full item record
It is important to understand and study the different adaptations and responses of plants changes in climate, especially, those living in arid environments where high temperatures, low precipitation, soil depth, soilmoisture availability, among others determines forest productivity, growth characteristics, water loss and physiognomy. Under conditions when plants are not stressed plants preferentially fix ¹²C, and the fixed CO₂ becomes ¹³C depleted. Under conditions where the plant is stressed it increases ¹³C fixation as a result of stomatal closure and enzymatic fractionation. Therefore we hypothesized that ð¹³C of leaf tissue will reflect month to month changes in water availability as a function of the precipitation . In this research we studied mangroves in the Guánica Dry Forest Reserve to understand the seasonal changes of water use efficiency by plants in relation to water availability. The natural abundance of isotopic carbon (ð¹³C) of leaf tissue was used as a measure of long term water use efficiency.