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• 1. [Article] Vegetation and stem mapping of watershed 10, H. J. Andrews Experimental Forest

  Stem mapping of all trees greater than 15 cm dbh has been completed on the 10.24 hectare watershed (No. 10) at H. J. Andrews intensive study site. Using a 25 m grid system, mapping of vegetation into 7 ...

  Citation × Citation Citation Abstract Copy Title: Vegetation and stem mapping of watershed 10, H. J. Andrews Experimental Forest Author: Hawk, Glenn M., U.S. International Biological Program. Coniferous Forest Biome, University of Washington Stem mapping of all trees greater than 15 cm dbh has been completed on the 10.24 hectare watershed (No. 10) at H. J. Andrews intensive study site. Using a 25 m grid system, mapping of vegetation into 7 plant communities and then into 4 habitat types has also been completed. Descriptions of these communities based on field notes and extrapolation from reference stands located in the Andrews Experimental Forest are included along with structural characteristics of the communities and habitat types. Size class distributions of living trees greater than 15 cm dbh are also included for the whole watershed, for communities, and for habitat types. INTRODUCTION: Watershed 10 has been selected for current modeling efforts of the IBP Coniferous Forest Biome project at the Oregon intensive study site, H. J. Andrews Experimental Forest. This report supplies a necessary input for calculating standing crop of vegetation in all strata from trees to mosses. A community description approach has been used with tables and appendices furnishing data concerning trees, shrubs, herbs and mosses occurring within the watershed. Watershed 10 contains representatives of communities common to the lower elevation regions of the Tsuga hetero h lla Zone of Franklin and Dyrness (1969). Within watershed communities are identified, which are discussed below. Major emphasis of this report is placed on description of the vegetation. Some comparisons of communities with each other and with other portions of the Tsuga heterophylla Zone near the H. J. Andrews Experimental Forest are also included. Watershed 10 is a 10.24 hectare watershed that drains to the west. It is located near to but outside of the southwestern boundary of the Experimental Forest. The elevation of the watershed ranges from 1425 feet (435 m) to 2,275 feet (695 m). The entire watershed lies within the Tsuga heterophylla.Zone of Franklin and Dyrness. METHODS: Preliminary surveying of watershed 10 with staff compass, chains and Abney levels was completed in 1970. During this surveying three base lines running north and south were established at equal intervals within the watershed. These base lines served as reference points during the establishment of a 25 m grid system in 1971-1972. Using staff compass, chains, and Abney levels, the 25 m grid system was established with correction for slope over the entire watershed (figure 1). During spring, 1972, aluminum corner stakes were installed and labeled to mark the 25 meter grid corners. Grid sections were numbered, for referencing positions in the watershed. Title: Vegetation and stem mapping of watershed 10, H. J. Andrews Experimental Forest Author: Hawk, Glenn M., U.S. International Biological Program. Coniferous Forest Biome, University of Washington Stem mapping of all trees greater than 15 cm dbh has been completed on the 10.24 hectare watershed (No. 10) at H. J. Andrews intensive study site. Using a 25 m grid system, mapping of vegetation into 7 plant communities and then into 4 habitat types has also been completed. Descriptions of these communities based on field notes and extrapolation from reference stands located in the Andrews Experimental Forest are included along with structural characteristics of the communities and habitat types. Size class distributions of living trees greater than 15 cm dbh are also included for the whole watershed, for communities, and for habitat types. INTRODUCTION: Watershed 10 has been selected for current modeling efforts of the IBP Coniferous Forest Biome project at the Oregon intensive study site, H. J. Andrews Experimental Forest. This report supplies a necessary input for calculating standing crop of vegetation in all strata from trees to mosses. A community description approach has been used with tables and appendices furnishing data concerning trees, shrubs, herbs and mosses occurring within the watershed. Watershed 10 contains representatives of communities common to the lower elevation regions of the Tsuga hetero h lla Zone of Franklin and Dyrness (1969). Within watershed communities are identified, which are discussed below. Major emphasis of this report is placed on description of the vegetation. Some comparisons of communities with each other and with other portions of the Tsuga heterophylla Zone near the H. J. Andrews Experimental Forest are also included. Watershed 10 is a 10.24 hectare watershed that drains to the west. It is located near to but outside of the southwestern boundary of the Experimental Forest. The elevation of the watershed ranges from 1425 feet (435 m) to 2,275 feet (695 m). The entire watershed lies within the Tsuga heterophylla.Zone of Franklin and Dyrness. METHODS: Preliminary surveying of watershed 10 with staff compass, chains and Abney levels was completed in 1970. During this surveying three base lines running north and south were established at equal intervals within the watershed. These base lines served as reference points during the establishment of a 25 m grid system in 1971-1972. Using staff compass, chains, and Abney levels, the 25 m grid system was established with correction for slope over the entire watershed (figure 1). During spring, 1972, aluminum corner stakes were installed and labeled to mark the 25 meter grid corners. Grid sections were numbered, for referencing positions in the watershed. 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• 2. [Article] Vegetation and soils of the Hi-15 watersheds, H. J. Andrews Experimental Forest

  Early in the planning of the Coniferous Biome research program, it was recognized that Experimental Watersheds 6, 7, and 8 in the H. J. Andrews Experimental Forest might provide ideal study sites for certain ...

  Citation × Citation Citation Abstract Copy Title: Vegetation and soils of the Hi-15 watersheds, H. J. Andrews Experimental Forest Author: Hawk, Glenn M., U.S. International Biological Program. Coniferous Forest Biome, Dyrness, C. T., University of Washington Early in the planning of the Coniferous Biome research program, it was recognized that Experimental Watersheds 6, 7, and 8 in the H. J. Andrews Experimental Forest might provide ideal study sites for certain phases of the Biome program. A study was funded during year 1 (1970) to provide necessary background ecological information about these watersheds, which then would be available before intensive studies were undertaken. This report contains a summary of the information obtained as a result of an inventory of vegetation and soils present on the watershed. It contains the vegetation mapping legend, vegetation maps, descriptions of mapped vegetation units, a generalized soil map, and a brief description of soils present. In addition to the small maps included with this report, large-scale vegetation maps (scale 1 in. = 2 chains: 1 chain = 66 feet) also are available. Title: Vegetation and soils of the Hi-15 watersheds, H. J. Andrews Experimental Forest Author: Hawk, Glenn M., U.S. International Biological Program. Coniferous Forest Biome, Dyrness, C. T., University of Washington Early in the planning of the Coniferous Biome research program, it was recognized that Experimental Watersheds 6, 7, and 8 in the H. J. Andrews Experimental Forest might provide ideal study sites for certain phases of the Biome program. A study was funded during year 1 (1970) to provide necessary background ecological information about these watersheds, which then would be available before intensive studies were undertaken. This report contains a summary of the information obtained as a result of an inventory of vegetation and soils present on the watershed. It contains the vegetation mapping legend, vegetation maps, descriptions of mapped vegetation units, a generalized soil map, and a brief description of soils present. In addition to the small maps included with this report, large-scale vegetation maps (scale 1 in. = 2 chains: 1 chain = 66 feet) also are available. Close