U.S. Department of Energy Office of Scientific and Technical Information
Lab and Field Warming Similarly Advance Germination Date and Limit Germination Rate for High and Low Elevation Provenances of Two Widespread Subalpine Conifers
Univ. of California, Berkeley, CA (United States). Energy and Resources Group; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Merced, CA (United States). School of Natural Sciences; University of California, Berkeley
New Mexico State Univ., Las Cruces, NM (United States). Dept. of Animal and Range Sciences
New Mexico State Univ., Las Cruces, NM (United States). Dept. of Biology
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States
Point Blue Conservation Science, Petaluma, CA (United States)
Univ. of California, Merced, CA (United States). School of Natural Sciences
Accurately predicting upslope shifts in subalpine tree ranges with warming requires understanding how future forest populations will be affected by climate change, as these are the seed sources for new tree line and alpine populations. Early life history stages are particularly sensitive to climate and are also influenced by genetic variation among populations. Here, we tested the climate sensitivity of germination and initial development for two widely distributed subalpine conifers, using controlled-environment growth chambers with one temperature regime from subalpine forest in the Colorado Rocky Mountains and one 5 °C warmer, and two soil moisture levels. We also tracked germination rate and timing, rate of seedling development, and seedling morphology for two seed provenances separated by ~300 m elevation. Warming advanced germination timing and initial seedling development by a total of ~2 weeks, advances comparable to mean differences between provenances. Advances were similar for both provenances and species; however, warming reduced the overall germination rate, as did low soil moisture, only for Picea engelmannii. A three-year field warming and watering experiment planted with the same species and provenances yielded responses qualitatively consistent with the lab trials. Altogether these experiments indicate that in a warmer, drier climate, P. engelmannii germination, and thus regeneration, could decline, which could lead to declining subalpine forest populations, while Pinus flexilis forest populations could remain robust as a seed source for upslope range shifts.
Kueppers, Lara, et al. "Lab and Field Warming Similarly Advance Germination Date and Limit Germination Rate for High and Low Elevation Provenances of Two Widespread Subalpine Conifers." Forests, vol. 8, no. 11, Nov. 2017. https://doi.org/10.3390/f8110433
Kueppers, Lara, Faist, Akasha, Ferrenberg, Scott, Castanha, Cristina, Conlisk, Erin, & Wolf, Jennifer (2017). Lab and Field Warming Similarly Advance Germination Date and Limit Germination Rate for High and Low Elevation Provenances of Two Widespread Subalpine Conifers. Forests, 8(11). https://doi.org/10.3390/f8110433
Kueppers, Lara, Faist, Akasha, Ferrenberg, Scott, et al., "Lab and Field Warming Similarly Advance Germination Date and Limit Germination Rate for High and Low Elevation Provenances of Two Widespread Subalpine Conifers," Forests 8, no. 11 (2017), https://doi.org/10.3390/f8110433
@article{osti_1414639,
author = {Kueppers, Lara and Faist, Akasha and Ferrenberg, Scott and Castanha, Cristina and Conlisk, Erin and Wolf, Jennifer},
title = {Lab and Field Warming Similarly Advance Germination Date and Limit Germination Rate for High and Low Elevation Provenances of Two Widespread Subalpine Conifers},
annote = {Accurately predicting upslope shifts in subalpine tree ranges with warming requires understanding how future forest populations will be affected by climate change, as these are the seed sources for new tree line and alpine populations. Early life history stages are particularly sensitive to climate and are also influenced by genetic variation among populations. Here, we tested the climate sensitivity of germination and initial development for two widely distributed subalpine conifers, using controlled-environment growth chambers with one temperature regime from subalpine forest in the Colorado Rocky Mountains and one 5 °C warmer, and two soil moisture levels. We also tracked germination rate and timing, rate of seedling development, and seedling morphology for two seed provenances separated by ~300 m elevation. Warming advanced germination timing and initial seedling development by a total of ~2 weeks, advances comparable to mean differences between provenances. Advances were similar for both provenances and species; however, warming reduced the overall germination rate, as did low soil moisture, only for Picea engelmannii. A three-year field warming and watering experiment planted with the same species and provenances yielded responses qualitatively consistent with the lab trials. Altogether these experiments indicate that in a warmer, drier climate, P. engelmannii germination, and thus regeneration, could decline, which could lead to declining subalpine forest populations, while Pinus flexilis forest populations could remain robust as a seed source for upslope range shifts.},
doi = {10.3390/f8110433},
url = {https://www.osti.gov/biblio/1414639},
journal = {Forests},
issn = {ISSN 1999-4907},
number = {11},
volume = {8},
place = {United States},
publisher = {MDPI},
year = {2017},
month = {11}}
Conlisk, Erin; Castanha, Cristina; Germino, Matthew J.
Dryad Digital Repository-Supplementary information for journal article at DOI: 10.1111/gcb.13840, 1 ZIP file (1.918 Mb)https://doi.org/10.5061/dryad.tk1v8