Figure 8
From: Effects of Sitka spruce masting on phenology and demography of siskins Spinus spinus
Impact of cone crop on nitrogen and carbon stable isotopes. (a) Nitrogen isotope ratio of siskin fledgling feathers in relation to cone score. R2 = 0.1868. (b) Carbon isotope ratio of siskin fledgling feathers in relation to cone score. R2 = 0.6192.
