Title:

Forest abundance data for the Abies concolor and Abies magnifica ecotone in the central Sierra Nevada range, California

Author(s):

Nelson, Kellen N.; O’Dean, Emily; Knapp, Eric E.; Parker, Albert J.; Bisbing, Sarah M.

Publication Year:

2021

How to Cite:

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Nelson, Kellen N.; O’Dean, Emily; Knapp, Eric E.; Parker, Albert J.; Bisbing, Sarah M. 2021. Forest abundance data for the Abies concolor and Abies magnifica ecotone in the central Sierra Nevada range, California. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2021-0057

Abstract:

This publication includes forest composition and structure data from two observational field studies conducted across the Abies concolor-Abies magnifica ecotone in the central Sierra Nevada range of California, and data from a growth chamber experiment designed to evaluate the sensitivity of Abies concolor and Abies magnifica seedling growth and survival to current and projected future climate conditions. The 1981 field study includes tree size and abundance measurements collected in 30 plots located on sites with equal abundances of Abies concolor and Abies magnifica overstory trees along the Tioga Pass Road and Glacier Point Roads in Yosemite National Park, California. The 2016 field study includes tree size and abundance measurements collected in 60 plots randomly located on north-facing aspects across an elevation gradient that spans the lower and upper elevation bounds of the Abies concolor and Abies magnifica ecotone in the central Sierra Nevada Range of California. Plots in 2016 were distributed across the Tioga Pass Road and Glacier Point areas in Yosemite National Park, and the Crabtree and Herring Creek areas in the Stanislaus National Forest. Also included are historic and projected future climate data (1981-2010, RCP 8.5 2040-2069, RCP 8.5 2070-2099) extracted at 2016 plot locations using ClimateNA software. Finally, seedling survival and biomass growth measurements were collected in a fully factorial growth chamber experiment that assessed the effects of present (2001-2010), projected mid-21st century (2040-2069), and projected late-21st century (2070-2099) temperature, soil drying, and growing season length conditions. Each of 27 treatment combinations was replicated with 14 seedlings per species. Climate conditions were based on predictions made by the Canadian Centre for Climate Modelling and Analysis (CanESM2) under the RCP 8.5 emissions forcing scenario.

Keywords:

climate envelope; climate tolerance; ecotone; elevational gradient; growth chamber experiment; regeneration; species distributions; species demographics; biota; climatologyMeteorologyAtmosphere; elevation; environment; Climate change; Climate change effects; Ecological adaptation; Ecology, Ecosystems, & Environment; Plant ecology; California; Stanislaus National Forest; Yosemite National Park; Sierra Nevada

Related publications:

• Nelson, Kellen N.; O’Dean, Emily; Knapp, Eric E.; Parker, Albert J.; Bisbing, Sarah M. 2021. Persistent yet vulnerable: resurvey of an Abies ecotone reveals few differences but vulnerability to climate change. Ecology. 102(12): e03525. https://doi.org/10.1002/ecy.3525 https://research.fs.usda.gov/treesearch/65273
• Parker, Albert J. 1984. Mixed forests of red fir and white fir in Yosemite National Park, California. The American Midland Naturalist. 112: 15-23. https://doi.org/10.2307/2425451
• Parker, Albert J. 1986. Environmental and historical factors affecting red and white fir regeneration in ecotonal forests. Forest Science. 32: 339-347. https://doi.org/10.1093/forestscience/32.2.339

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