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Maine Population Projections, 1970-2020, State Planning Office, State Of Maine

Maine Collection

Maine Population Projections, 1970-2020

State Planning Office, Executive Department, State of Maine, July 1973.

Kenneth M. Curtis, Governor and Philip M. Savage, Director.

Contents: Introduction / Total Population Trends in Maine 1970-2020 / Natural Increase / Net Migration / Maine's Future Population / Population Projections by Planning and Development District / Projected Age Groups by Planning and Development District / Appendix

Also contains maps, figures, and tables.

Breeding Bird Populations And Habitat Utilization In Aspen Stands Of Upper Logan Canyon, Janet L. Young

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Censuses of two 20-acre plots in upper Logan Canyon, Utah, were made by the spot-mapping method during 1970 and 1971 to determine the differences in composition and density of breeding-bird populations in aspen stands of significantly different density and stature. The less dense stand of greater average d.b.h., average height and per cent ground cover had 20 breeding species totalling 615 pairs per 100 acres (expressed as equivalent territories). The more dense stand of smaller trees and brushy undergrowth had 14 breeding species with 267.5 equivalent territories per 100 acres. Nine species were found on both areas. Observations of foraging …