Fig. 7.

Mean individual monoterpene concentrations (mg g⁻¹ FW) of six compounds found in Pinus edulis current and one-year old needle tissue across the four treatments averaged over nine sampling periods (2012–2016). a (−)-α-Pinene, b (+)-α -pinene, c β -myrcene, d δ-3-carene, e S-(-)-limonene, f) R-( +)-limonene. Compounds were chosen to highlight the variation in responses across treatments and tissues. Bars represent means ± SEM and significance between treatments is expressed using different lowercase letters (α < 0.05)