MOUNT DESERT — When just one member of the Harbor Committee expressed worry about a landscape approach for the Northeast Harbor Marina space that was presented to the committee Oct. 11, many others quickly adopted.  The Backyard Club of Mount Desert engaged award-successful landscape architect Bruce John Riddell to create a beautification program for the significant grassy space typically known as the village environmentally friendly and for the region all around the tennis courts. The strategy phone calls for, more than time, planting purple maples along the west facet of the environmentally friendly and developing a berm for lesser plantings on the south and southeast side, like along the location…