ENCS407 Lecture Notes - Lecture 11: Pinus Ponderosa, Chaparral, Pseudoroegneria Spicata

• School: University of Alberta
• Department: Environmental and Conservation Sciences
• Course: ENCS407
• Professor: Lisa Raatz

Document Summary

Lecture 11: biomes: savannas, forests & tension zones. Open grassland with relatively sparse tree cover deposit leaf litter on soil surface. Savanna types: oak, oakbrush, ponderosa pine, pinyon-juniper, sagebrush-grass, aspen parkland, chapparal. There are tension zones on all sides caused by increasing moisture gradients which favours tree/shrub growth: 4 tensions zones around the. Great plains: north-aspen parkland, east-oak savanna (q. stellate, south- oakbrush, pinyon- juniper, sclerphyte, west- ponderosa pine, douglas fir. Aspen seral phase transition to conifer forests: protected in the us and transitions to spruce/pine forest regrowth is grazed by ungulates (elk) Ponderosa pine: elevational community, p. ponderosa, s. albus, purshia tridentate, muhlenbergia montata, festuca idahoensis. Ingrowth with lodgepole pine: adapted to low intensity fire, fire interval ever 5-10 years, used for commercial forestry. Ingrowth increases intensity of fire into the canopy. Elevational community: d. fir, p. tremuloides, c. rubescens, pseudoroegneria spicata, f. idahoensis, campestris.