Long-term study of the grass Bouteloua rigidiseta
Since 1983 an annual census has been made of a set of permanent plots located in open grassy patches in a live oak/Ashe juniper savanna in central Texas. Data from these plots have provided the basis for on ongoing study of plant population dynamics and regulation, especially of the native perennial grass Bouteloua rigidiseta (Texas grama grass).
Fowler, N. L., and C. M. Pease.
2010. Temporal variation in the carrying capacity of a perennial grass
population. American Naturalist 175:504-512. Abstract
Fowler, N. L., R. D. Overath, and C. M. Pease. 2006. Detection of density dependence requires density manipulations and calculation of λ. Ecology 87:655-664. Abstract
Fowler, N. L. 1995. Density-dependent demography in two grasses: a five-year study. Ecology 76:2145-2164. Abstract
Fowler, N. L. 1986. Density-dependent population regulation in a Texas grassland. Ecology 67:545-554. Abstract
Modeling demographic heterogeneity
demographic heterogeneity poster (Batchelor and Fowler 2003)Effects of simulated grazing on Bothriochloa ischaemum population dynamics
Bethany
Gabbard compared clipped and unclipped plots in
a field population of this invasive grass to quantify the effects of
defoliation on life history components, population structure, and λ.
Bothriochloa ischaemum population dynamics poster (Gabbard & Fowler 2004)
Demography of the invasive Centaurea stoebe (spotted knapweed) in New York State
Norma Fowler, co-PIs Jessica Gurevitch and Catherine Graham of SUNY-Stoney Brook, plus Ana González (UT), Emily Rollinson, Ed Lowry, and Jorge Velasquez (SUNY), are investigating the population dynamics of a new invasion of this serious weed in the Adirondack Mountains and on Long Island, two constrasting parts of New York State. The primary role of Fowler and her lab will be in statistical analysis of demographic data and the construction and analysis of demographic models.
