| biological soil crusts of sand dunes in cape cod national seashore, massachusetts, usa. | biological soil crusts cover hundreds of hectares of sand dunes at the northern tip of cape cod national seashore (massachusetts, usa). although the presence of crusts in this habitat has long been recognized, neither the organisms nor their ecological roles have been described. in this study, we report on the microbial community composition of crusts from this region and describe several of their physical and chemical attributes that bear on their environmental role. microscopic and molecular a ... | 2004 | 15546040 |