Mike the Mad Biologist thinks so: A program to get geese out of Science Park only got them to move down to the Esplanade, which they now crap up, leading to crappy runoff into the river, feeding what has become an annual bloom of blue-green algae that is itself pretty gross:
... These algal blooms have been spotted in previous years up by Science Park, but now the blooms have moved down river to the Esplanade. Over the last couple of years, something else has moved downriver: geese. Two years ago, if you went out to the Esplanade on a summer day, the grass was packed with people. ... Now, almost nobody sits out at the Esplanade, with good reason: there's probably five to ten goose turds per square meter--that's fresh turds. It really is that disgusting (you definitely need a towel and a chair). The city of Boston is spending thousands and thousands of dollars to make an all-you-can-eat goose buffet and gooseshitatorium. ...