Aspen Bibliography

Title

Do Pine Trees in Aspen Stands Increase Bird Diversity

Document Type

Contribution to Book

Source

Sustaining aspen in western landscapes: symposium proceedings, June 3-15, 2000, Grand Junction, CO. Fort Collins, CO. USDA Forest Service, Rocky Mountain Research Station, 460 pp.

Editor

WD Shepperd, D Binkley, DL Bartos, TJ Stohlgren, and LG Eskew compilers

Volume

Proceedings RMRS-P-18

First Page

185

Last Page

191

Publication Date

2001

Abstract

In the Black Hills of South Dakota, quaking aspen (Populus tremuloides) is being replaced by conifers through fire suppression and successional processes. Al- though the Black Hills National forest is removing conifers (primarily ponderosa pine [Pinus ponderosa])toincreasetheaspencommunitiesinsomemixedstands,ForestPlan guidelines allow four conifers per hectare to remain to increase diversity in the remaining aspen stand. We compared bird species richness in pure ponderosa pine, mixed stands dominated by ponderosa pine with quaking aspen, mixed stands dominated by aspen

with ponderosa pine, and pure aspen stands. Stands dominated by ponderosa pine had lower (P <0.01) bird species richness than stands dominated by aspen, Aspen in ponderosa pine stands or pine in aspen stands did not increase bird species richness (P ≥0.68) over the respective pure stands. Thus, leavingponderosa pine in aspen stands will not have the desiredeffectofincreasing birddiversitybutmayhave thenegativeeffect of speeding successional processes that rep/ace aspen with conifers.