2021
DOI: 10.3390/plants10020327
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Germination at Extreme Temperatures: Implications for Alpine Shrub Encroachment

Abstract: Worldwide, shrub cover is increasing across alpine and tundra landscapes in response to warming ambient temperatures and declines in snowpack. With a changing climate, shrub encroachment may rely on recruitment from seed occurring outside of the optimum temperature range. We used a temperature gradient plate in order to determine the germination niche of 14 alpine shrub species. We then related the range in laboratory germination temperatures of each species to long-term average temperature conditions at: (1) … Show more

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Cited by 9 publications
(7 citation statements)
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“…Furthermore, shrubs usually produce a biochemically recalcitrant plant litter and decrease the photooxidation of surface organic matter, two processes that promote litter accumulation (Eldridge et al, 2011; Fenner & Freeman, 2020). The combination of a thicker litter layer and the relatively lower temperatures at shrub understories can significantly impact the reproductive success of many herbaceous species (Venn et al, 2021).…”
Section: Discussionmentioning
confidence: 99%
“…Furthermore, shrubs usually produce a biochemically recalcitrant plant litter and decrease the photooxidation of surface organic matter, two processes that promote litter accumulation (Eldridge et al, 2011; Fenner & Freeman, 2020). The combination of a thicker litter layer and the relatively lower temperatures at shrub understories can significantly impact the reproductive success of many herbaceous species (Venn et al, 2021).…”
Section: Discussionmentioning
confidence: 99%
“…By the mechanism of pyrthrin, they enter the nervous system of the insect by penetrating its cutile when they come into contact with its body. This causes the nerve cells to stop functioning and the insect nervous system to close, which ultimately causes the insect to die (Venn et al, 2021). C. cinerariaefolium contains pyrethrin, a potent natural insecticide that acts on insects' nerve systems systems to provide a "knockdown effect" (Kikuta et al, 2012).…”
Section: Evaluation Of the Chrysanthemum Oil Treatment On Adult C Mac...mentioning
confidence: 99%
“…Shrubs act as an essential component of global and regional vegetation and have rich characteristic such as wide distributions, high germination rates, and high morphological and physiological plasticity, which is an ideal natural experimental model to facilitate adaptation for diverse environments (Xu et al, 2020;Venn et al, 2021). Generally, shrubs are an important component of forest ecosystems and play a vital role in natural forest dynamics, especially during the first stages of tree development.…”
Section: Introductionmentioning
confidence: 99%