maple syrup producers say they are feeling the effect of climate change They had a talk with climate experts some producers talked of seeing a steep drop in the amounts of sap they are getting while others are dealing with another trend caused by warmer temperatures in which the sap goes up to the top of the trees rather than down to taps warmer temperatures in which the dap goes up to the top of the trees rather than down to taps others complained about a drop in the sugar content of their sap