Hl. Throop et Pa. Fay, Effects of fire, browsers and gallers on New Jersey tea (Ceanothus herbaceous) growth and reproduction, AM MIDL NAT, 141(1), 1999, pp. 51-58
Woody plant species in grassland ecosystems can be subjected to damage from
fire and multiple herbivore species, but interactions between fire and her
bivory can modify their separate impacts an woody plant life histories. We
studied how galling (by Periploca ceanothiella, Lepidoptera: Cosmopterigida
e), deer browsing (Odocoilius virginianus) and fire affected the growth and
reproduction of the woody shrub Ceanothus herbaceous (Rhamnaceae) on a bur
ned and an unburned site at Konza Prairie Research Natural Area in eastern
Kansas. Fire was the major influence on C. herbaceous growth, causing plant
s to produce long unbranched vegetative ramets from protected belowground m
eristems, while unburned plants were heavily branched and bore shorter shoo
ts and numerous inflorescences. Unburned plants experienced higher gall fre
quencies, more galls on their longest shoots, but similar deer browsing com
pared to burned plants. Ramets with herbivore damage had more branches and
inflorescences than undamaged ramets, especially where both herbivores were
present. Ceanothus herbaceous' flexible life history responses suggest tol
erance of multiple forms of damage.