DBG Physaria bellii Demographic Monitoring

Study Extent

30 meter by 1 meter sub-plots within a 30 meter by 20 meter macro-plot.

Sampling

The Physaria bellii transect is found along the western slope of the ridge. The 20m x 30m plot is located along the ridge, 43 meters north of the barbed wire fence. Each transect within the macroplot is 30 x 1 meters, and are placed at 2 meters intervals starting from 1.97 meters from the south west corner of the macroplot. On the south grid of the plot, a nail and its number are allotted. Run a tape measure 30m parallel with the ridge. Straighten tape (make sure tape measures 30m long). Some nails on the north edge are placed at more than 30m due to rocks or constraints of the soil but measurements should only be recorded to 30m. Position a 1m x 30m macro-plot in the correct location for the macro-plot to be sampled, i.e., meters 7.97-8.97 x 30m for plot 7.97m (tag #86). Before beginning actual observation, make sure you fill in the name of the site, plot # (meter), tag # (nail tag), page # per plot, date and your name. Count all Physaria bellii that fall within the plot or touch the south and west lines of the macro-plot (see Figure 1). Plants touching the north and east lines are considered out and not recorded. For X-coordinate (0-100cm) and Y-coordinate (0-30m), record the distance from the starting point to the center of the plant, i.e., 0.55m (55cm) and 22m. If you find a cluster of tiny Physaria bellii rosettes, record the distance to the center of the cluster for the X-coordinate and Y-coordinate, and then count the number of rosettes in the cluster. Record whether the plant is flowered (i.e., 0 or 1), and the number of flowering stems. If the plant has fruit, please count the number of fruit on the plant. Record whether the plant is browsed by insects or mammals, trampled by human or mammals (i.e., 0 or 1). In the comment section, describe the type of browsing observed and the condition of the plant, if any. Note: 0-absence, 1-presence.

Method steps

1. The Physaria bellii transect is found along the western slope of the ridge. The 20m x 30m plot is located along the ridge, 43 meters north of the barbed wire fence. Each transect within the macroplot is 30 x 1 meters, and are placed at 2 meters intervals starting from 1.97 meters from the south west corner of the macroplot. On the south grid of the plot, a nail and its number are allotted. Run a tape measure 30m parallel with the ridge. Straighten tape (make sure tape measures 30m long). Some nails on the north edge are placed at more than 30m due to rocks or constraints of the soil but measurements should only be recorded to 30m. Position a 1m x 30m macro-plot in the correct location for the macro-plot to be sampled, i.e., meters 7.97-8.97 x 30m for plot 7.97m (tag #86). Before beginning actual observation, make sure you fill in the name of the site, plot # (meter), tag # (nail tag), page # per plot, date and your name. Count all Physaria bellii that fall within the plot or touch the south and west lines of the macro-plot (see Figure 1). Plants touching the north and east lines are considered out and not recorded. For X-coordinate (0-100cm) and Y-coordinate (0-30m), record the distance from the starting point to the center of the plant, i.e., 0.55m (55cm) and 22m. If you find a cluster of tiny Physaria bellii rosettes, record the distance to the center of the cluster for the X-coordinate and Y-coordinate, and then count the number of rosettes in the cluster. Record whether the plant is flowered (i.e., 0 or 1), and the number of flowering stems. If the plant has fruit, please count the number of fruit on the plant. Record whether the plant is browsed by insects or mammals, trampled by human or mammals (i.e., 0 or 1). In the comment section, describe the type of browsing observed and the condition of the plant, if any. Note: 0-absence, 1-presence.

1. Physaria bellii
   common name: Bell's twinpod rank: species

Exact location of the population has been redacted from this dataset to protect the integrity of this imperiled (G2) species. Please contact the listed individuals for detailed location information.