Fire-Dependent Forests in the Northern Rocky Mountains

1973 ◽  
Vol 3 (3) ◽  
pp. 408-424 ◽  
Author(s):  
James R. Habeck ◽  
Robert W. Mutch

AbstractOne objective of wilderness and parkland fire-ecology research is to describe the relationships between fire and unmanaged ecosystems, so that strategies can be determined that will provide a more nearly natural incidence of fire. More than 50 yr of efforts directed toward exclusion of wildland fires in the Northern Rocky Mountains (western Montana and northern Idaho) have resulted in a definite and observable impact on the forest ecosystems in this region. Fire-ecology investigations in Glacier National Park and the Selway-Bitterroot Wilderness have helped to reveal the nature of this impact and to provide a better understanding of the natural role of fire within these coniferous ecosystems. Such areas provide a unique opportunity to study and test approaches designed to perpetuate unmodified ecosystems. However, we still don't understand all of the long-term consequences of fire control in those forest communities that have evolved fire-dependent characteristics.

2014 ◽  
Vol 46 (2) ◽  
pp. 407-418 ◽  
Author(s):  
Diana F. Tomback ◽  
Kathryn G. Chipman ◽  
Lynn M. Resler ◽  
Emily K. Smith-McKenna ◽  
Cyndi M. Smith

2017 ◽  
Vol 63 (1) ◽  
pp. 136-146
Author(s):  
Woongsoon Jang ◽  
Christopher R. Keyes ◽  
Deborah S. Page-Dumroese

2017 ◽  
Vol 63 (1) ◽  
pp. 136-146
Author(s):  
Woongsoon Jang ◽  
Christopher R. Keyes ◽  
Deborah S. Page-Dumroese

Phytotaxa ◽  
2013 ◽  
Vol 127 (1) ◽  
pp. 58
Author(s):  
DIANE WINTER ◽  
LOREN BAHLS

A new species of Encyonema is described from the benthos of small mountain streams and rivers in western Montana and northern Wyoming. Previously this species had been identified incorrectly as E. hebridicum Grunow ex Cleve and Cymbella affinis Kützing or assigned the provisional name Encyonema sp. 1 MONTANA HAMSHER ANSP. Here we formally recognize this taxon as a new species, Encyonema hamsherae.


2019 ◽  
Vol 65 (5) ◽  
pp. 626-636
Author(s):  
Chenchen Shen ◽  
Andrew S Nelson ◽  
Terrie B Jain ◽  
Meghan B Foard ◽  
Russell T Graham

Abstract A thinning study was established in 1967 in moist mixed forests on the Priest River Experimental Forest in northern Idaho, USA. The study design included three thinning intensities: low, moderate, and high intensity (1,976, 988, and 494 trees ha–1). This study examined short-term (11 years) and long-term (50 years) thinning effects on residual stand characteristics, growth, and yield. Since regeneration may occur after thinning, understory change was also addressed. Thinning decreased stand density immediately but improved the growth of residual trees. Shade-tolerant species were favored in all the thinnings and dominated 50 years after thinning. Unthinned stands had higher total and merchantable volume than all thinned stands both 11 years and 50 years post treatment. Regeneration and nontree vegetation richness increased shortly after thinning, whereas nontree vegetation cover decreased sharply 50 years after treatment. The stands developed into multistrata forests with shade-tolerant species in both the overstory and understory. This is contrary to current thinning practice favoring shade-intolerant species, but demonstrates the resilience of moist Northern Rockies forests to partial overstory disturbances. In this study, thinning favoring shade-tolerant species in these mixed forests has a more significant effect on forest structure dynamics than timber production.


1969 ◽  
Vol 47 (10) ◽  
pp. 1565-1570 ◽  
Author(s):  
James R. Habeck ◽  
T. W. Weaver

Much of the spruce occurring in western Montana is suspected of being hybrid derivatives from the introgression between Picea glauca and P. engelmannii whose botanical ranges overlap in Montana. These Montana populations were analyzed by chemosystematic methods; resins were collected from typical P. glauca (Manitoba) and typical P. engelmannii (Wyoming) populations and these were analyzed by vapor-phase chromatography, as were resins from western Montana populations. Monoterpene compositions were determined and through the calculation of ratios based on the percentages of limonene, myrcene, and beta phellandrene, a two-dimensional ordination was constructed of the typical and hybrid spruce populations. The methods provide a highly useful approach towards interpreting chemosystematic data collected from Picea populations in the northern Rocky Mountains.


Sign in / Sign up

Export Citation Format

Share Document