Using Forest Patchiness to Determine Pollen Source Areas of Closed-Canopy Pollen Assemblages

Anthropogenic Ties to Late-Successional Structure and Composition in Four New England Hemlock Stands

“…This is consistent with studies of modern pollen distribution in closed stands (Jackson andWong 1994, Calcote 1995) and with the evidence of who were able to replicate compositional trends in similar humus records taken 40 m apart. We also note that the pollen records from Slab City IX and Slab City X are distinct, suggesting that the dominant pollen source area for the pollen records is less than the ϳ200 m separating these sites.…”

Late Wisconsin and Holocene Subalpine Forests of the Markagunt Plateau of Utah, Southwestern Colorado Plateau, U.S.A.

“…However, Dunwiddie (1987) found significant discrepancies in a comparison of modern moss polsters and modern cor-370 I ARCTIC, ANTARCTIC, AND ALPINE RESEARCH etop pollen assemblages. Jackson and Wong (1994) found that 25 to 90% of pollen found in moss polsters was from trees outside their 20-m sampling radius. We use caution in our interpretations of fossil pollen but note that significant changes in pollen assemblages occur in our modern samples over the elevational gradient.…”

Palaeoecological investigations towards the reconstruction of the history of forest clearances and coastal heathlands in south-western Norway

“…More recent studies (Prentice 1985;Jackson 1994;Sugita 1994;Jackson and Wong 1994;Calcote 1995;Sugita et al 1999), however, suggest that the complex relations between and interpretation of pollen sedimentation and vegetation is not as simple and straight forward as previously thought. A variety of factors must be taken into account including basin size, relevant pollen source area, background contribution, landscape openness, distanceweighted plant abundance, pollen dispersal functions, pollen terminal velocities, landscape patchiness, wind speed and pollen productivity.…”