Longevity of needle fascicles of Pinus longaeva (Bristlecone pine) and other North American pines

@article{Ewers2004LongevityON,
  title={Longevity of needle fascicles of Pinus longaeva (Bristlecone pine) and other North American pines},
  author={Frank W. Ewers and Rudolf Schmid},
  journal={Oecologia},
  year={2004},
  volume={51},
  pages={107-115}
}
SummaryVariation in leaf longevity of gymnosperms has received surprisingly little attention despite its likely adaptive significance. [] Key Result Literature data for the 37 species of Pinus native to the United States and Canada and field data for eight taxa (21 populations) of pines growing at various elevations in California each show a strong positive correlation between elevation and DSR, respectively, r=+0.65, df=35, p<0.001 and r=+0.82; df=19, p<0.001. We propose that extended needle fascicle…
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