Figure 1
Major classes in neotoma, their relations to one another and the associated methods (functions). The classes described below have a heavier outline than their associated variables. The class download contains multiple lists, including dataset, which is a list and defined class. dataset itself contains lists, one of which is also a class, site.neotoma can interact directly with classes through the use of special methods for the various functions described here. These objects and classes are described in more detail below.
Figure 2
How the main data objects relate to one another in the neotoma package, and the helper functions used to move from one data type to another.
| taxon.name | variable.units | variable.element | variable.context | taxon.group |
|---|---|---|---|---|
| Asteraceae undiff. | NISP | pollen | NA | Vascular plants |
| Betula | NISP | pollen | NA | Vascular plants |
| Pinus monticola-type | NISP | pollen | NA | Vascular plants |
| Myrica | NISP | pollen | NA | Vascular plants |
| Poaceae | NISP | pollen | NA | Vascular plants |
| Alnus | NISP | pollen | NA | Vascular plants |
| taxon.name | taxon.group | compressed | |
|---|---|---|---|
| 2 | Asteraceae undiff. | Vascular plants | Prairie Forbs |
| 29 | Betula | Vascular plants | Betula |
| 3 | Pinus monticola-type | Vascular plants | Pinus |
| 4 | Myrica | Vascular plants | Other |
| 5 | Poaceae | Vascular plants | Poaceae |
| 6 | Alnus | Vascular plants | Alnus |
Figure 3
Plots of Alnus pollen percentages at two sites, one in the lower mainland of British Columbia (Marion Lake, red) and the other on Haida G’waii (Louise Pond, black).
Figure 4
Stratigraphic plot for Marion Lake. Age is plotted on the y-axis in calibrated radiocarbon years before present. The analogue package provides the opportunity for users to further customize the stratigraphic plot if so desired.
Figure 5
Mapped sites with pollen cores in British Columbia, Alberta and the Yukon Territory of Canada (red), including other Neotoma sites without stratigraphic pollen data (black).
Figure 6
Mapped ages of first Pinus establishment in the interior of British Columbia and the Yukon Territory based on a 5% pollen cut-off. The age of first appearance is also plotted and smoothed with a loess curve.
Figure 7
Mean latitudinal distribution of fossil mammal taxa during the Late Pleistocene show that while there appears to be a net northward migratory pattern, a number of taxa appear not to shift their ranges, or move southward following deglaciation.