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    • Journal of Range Management, Volume 45 (1992)
    • Journal of Range Management, Volume 45, Number 1 (January 1992)
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    Big sagebrush germination patterns: Subspecies and population differences

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    Author
    Meyer, S. E.
    Monsen, S. B.
    Issue Date
    1992-01-01
    Keywords
    Artemisia tridentata spp. wyomingensis
    intraspecific variation
    population ecology
    artemisia tridentata subsp. vaseyana
    variation
    weed biology
    habitats
    seedling emergence
    air temperature
    adaptation
    winter
    Artemisia tridentata
    seed germination
    seed dormancy
    rangelands
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    Citation
    Meyer, S. E., & Monsen, S. B. (1992). Big sagebrush germination patterns: Subspecies and population differences. Journal of Range Management, 45(1), 87-93.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644674
    DOI
    10.2307/4002533
    Additional Links
    https://rangelands.org/
    Abstract
    Habitat-correlated differences in laboratory germination response under autumn (15 degrees C) and winter (1 degree C) temperature regimes were examined for 69 big sagebrush (Artemisia tridentata Nutt., Asteraceae) seed collections from a range of habitats in 7 western states. Mountain big sagebrush (ssp. vaseyana) exhibited the widest variation in dormant seed percentage and termination rate at 15 degrees C. Collections from severe winter sites had larger dormant seed fractions and slower germination rates than collections from mild winter sites. Basin big sagebrush (ssp. tridentata) and Wyoming big sagebrush (ssp. wyomingensis) collections were largely non-dormant and germinated quickly at 15 degrees C regardless of collection site winter climate. At 1 degree C, number of days to 50% of total germination was negatively correlated with collections site mean January temperature for all 3 subspecies. Collections from severe winter sites required up to 113 days to germinate to 50% at 1 degree C, while collections from mild winter sites required as few as 6 days. Habitat-correlated variation in germination response appears to be of adaptive significance. Dormancy and slow germination at 15 degrees C may prevent germination during autumn storms in the mountains, while delayed germination at continuous 1 degree C may prevent precocious germination under snowpack. In contrast, at mild winter sites, winter germination is promoted and probably affords the best chance for seedling survival. Between-population variation in germination strategy should be considered when artificially seeding this species.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002533
    Scopus Count
    Collections
    Journal of Range Management, Volume 45, Number 1 (January 1992)

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