The town is hoping to replace the Christmas tree in Bicentennial Park and is seeking donations to pay for it, town officials said. The annual tree lighting has been a tradition for more than 35 years, said Selectman Jody Dickerson, and the current tree, a blue spruce, is nearing the end of its life. It has been at the park since 1991, replacing one that Hurricane Bob blew down. The town’s tree and parks committee wants to replace the spruce with a disease-resistant concolor fir, he said, which would cost more than $2,000. There are donation boxes throughout town, and donations can also be made to the Tree/Parks Maintenance Fund, in care of Judy Mooney at the Marion Town House, 2 Spring St., Marion MA 02738. Donations will also be accepted at the tree lighting Dec. 9.