02073nas a2200217   4500008004100000245011000041210006900151300001400220490000700234520140400241653001901645653002301664653001301687653002101700653002401721653001301745653002101758100001901779700001901798856003801817       2001                        eng d00aPostglacial History of a Marl Fen: Vegetational Stability at Byron-Bergen Swamp, Genesee County, New York0 aPostglacial History of a Marl Fen Vegetational Stability at Byro  a1425-14380 v793 a<p>Byron-Bergen Swamp, an 800-ha mire complex in western New York, is a mosaic of hardwoodconifer forest, white cedar swamp, and open nonforested fens dominated by sedges, other herbs, and shrubs. The mire is a sloping, spring-fed rich fen in which marl deposition occurs in the open fens but not under forest. Two cores, 120 m apart, one in a marl fen and the other in a hardwoodconifer swamp, were taken to investigate the history of the mire. Sediment, pollen stratigraphy, and <sup>14</sup>C chronology show that the Holocene record of local vegetation at each coring site was very different. One site was first a shallow marl pool (10 700  5600 years BP), then an open shrubconifer vegetation, and finally a closed hardwoodconifer swamp. The other site progressed from a pinesprucetamarack swamp (10 700  8000 years BP) to a white cedar swamp (75003500 years BP) and then to a marl sedge fen (3500 years BP  present). The spatial arrangement of swamp forest and marl fen changed through time, responding to marl accumulation and lateral shifts in drainage pathways. Marl deposition occurred continuously at each site, although at different times, for several thousand years. The pattern of vegetation change that we found is not congruent with that predicted from classical hydrarch succession.<em>Key words</em>: marl, mire development, pollen stratigraphy, rich fen.</p>
10a14C chronology10aByron-Bergen Swamp10aHolocene10alocal vegetation10apollen stratigraphy10asediment10awestern New York1 aFutyma, R., P.1 aMiller, N., G.  uhttp://dx.doi.org/10.1139/b01-123