Fifty-year records of virgin stand development in southwestern ponderosa pine /

Avery, Charles C.

doi:10.5962/bhl.title.99751

Cited by 26 publications

(20 citation statements)

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“…Additional details on inventory data are given by Avery et al (1976). All pines with diameter at breast height (1.3-1.5 m; dbh) Ͼ8.9 cm (3.5Љ) were first tagged and measured in 1920, and then remeasured every 5 yr from 1920 to 1960, and every 10 yr from 1960 to 1990.…”

Section: Study Areamentioning

confidence: 99%

Comparing Tree-Ring Chronologies and Repeated Timber Inventories as Forest Monitoring Tools

Biondi¹

1999

Ecological Applications

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Historical information on forest growth is essential to evaluate and understand change in managed and unmanaged forests. Two ground-truth nondestructive sources of information on interannual to interdecadal changes are (a) repeated timber inventories and (b) tree-ring chronologies. I present here a case study of how those two types of data can complement and benefit each other. At the Gus Pearson Research Natural Area, a ponderosa pine stand near Flagstaff (Arizona, USA), timber inventories were repeated by the U.S. Forest Service from 1920 to 1990. The analysis of those data has revealed a decline of individual tree growth over the 20th century, attributed to increased stand density. Monthly precipitation and temperature at the study area showed no overall trend from 1910 to 1990. Tree-ring data collected at the area after 1990, and spanning the last few centuries, were compared to the inventory data to represent growth trends. Periodic basal area increment computed from forest inventories showed parallel trends but higher absolute values (especially for small pines) than periodic basal area increment computed from increment cores. Among selected ways of developing a tree-ring chronology, average ring area closely matched repeated forest inventories for 20th century trends and revealed that decadal-scale growth rates in the 1900s have been anomalous compared to the previous 300 years. The mensurational and dendrochronological approaches to forest monitoring showed advantages and disadvantages. Repeated forest inventories quantified growth of individual trees and of the entire stand, thus providing a complete picture, even in retrospect; but they had longer-than-annual resolution, and covered only the last decades. Dendrochronological data quantified annual xylem growth of individual trees over their whole life span, thus placing recent growth trends into a much longer historical perspective; but they had limited spatial coverage and could lead to different trends depending on the type of standardization option. Overall, the combination of both approaches is recommended for evaluating changes of forest growth at multiannual scales.

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Section: Study Areamentioning

confidence: 99%

Comparing Tree-Ring Chronologies and Repeated Timber Inventories as Forest Monitoring Tools

Biondi¹

1999

Ecological Applications

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“…The wind gradient between NCRNA and CHEF was steep; wind accounted for 63 % of individual mortality at NCRNA compared to 46 % at CHEF. Wind only accounted for 17 -47% of individual mortality for Pseudotsuga menziesii-Tsuga heterophylla forests in the Oregon Cascade Range, and 10 -18 % for ponderosa pine (Pinus ponderosa) forests (Avery, Larson & Schubert 1976;Franklin, Shugart & Harmon 1987).…”

Section: Mortalitymentioning

confidence: 99%

Patterns of growth, mortality and biomass change in a coastal Picea sitchensis ‐ Tsuga heterophylla forest

Greene

Harcombe

Harmon

et al. 1992

J Vegetation Science

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Abstract. Ten years (1979‐1989) of growth and mortality were determined in a 130‐yr old stand on the Oregon coast based on periodic remeasurements in 441000 m2 plots. Western hemlock (Tsuga heterophylla) constituted 90 % of the individuals and 57 % of the biomass. Wind is a major form of disturbance in this area, creating both small discrete and large diffuse disturbance patches; wind therefore has a direct effect on the location and extent of regeneration. Rates of tree mortality were high for this coastal stand (2.8 %/yr), especially compared to similar‐aged stands in the western and eastern Cascade Ranges. Though low in absolute density, Sitka spruce (Picea sitchensis) persisted in competition with the more tolerant western hemlock. Net production of bole biomass (4.9 Mg ha‐1 yr‐1) did not equal mortality (8.7 Mg ha‐1 yr‐1), and total biomass declined over the 10‐yr measurement period from 499 to 460 Mg/ha; this trend may have begun as early as the mid‐1950's at a peak biomass of about 600 Mg/ha. The decline may have been due to a positive feedback in which new gaps and enlarging gap perimeters exposed more and more trees to potential wind damage.

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“…The G.A. Pearson Natural Area near Flagstaff, AZ has been resampled periodically since 1920 (Avery et al, 1976), but the site is much smaller and therefore more homogeneous than the area of PPF in GCNP. Some of approximately 55 plots established in National Forests of Arizona andNew Mexico in 1909-1915 also have been resampled , but these plots were widely scattered (and have been harvested).…”

Section: Introductionmentioning

confidence: 99%

Post-1935 changes in forest vegetation of Grand Canyon National Park, Arizona, USA: Part 1 – ponderosa pine forest

Vankat

2011

Forest Ecology and Management

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Fifty-year records of virgin stand development in southwestern ponderosa pine /

Cited by 26 publications

References 0 publications

Comparing Tree-Ring Chronologies and Repeated Timber Inventories as Forest Monitoring Tools

Comparing Tree-Ring Chronologies and Repeated Timber Inventories as Forest Monitoring Tools

Patterns of growth, mortality and biomass change in a coastal Picea sitchensis ‐ Tsuga heterophylla forest

Post-1935 changes in forest vegetation of Grand Canyon National Park, Arizona, USA: Part 1 – ponderosa pine forest

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