Detecting the fingerprint of drought across Europe’s forests: do carbon isotope ratios and stem growth rates tell similar stories?

We evaluated the effectiveness of using the isotopic ratio of 13C to 12C stored in wood, referred to as δ13C, and stem basal area increments (BAI) as indicators of drought in European trees. Using tree ring data from over 3000 trees, we found that while δ13C responded strongly and consistently to drought across a diverse group of tree species and environmental conditions, droughts have small effects on BAI. The results indicate that while δ13C provides a powerful indicator of past drought occurrence, by themselves carbon isotope ratios tell us little about how carbon sequestration and allocation to wood are affected by droughts since most tree species were able to sustain growth even under conditions of low soil water availability.

Jucker, T.; Grossiord, C.; Bonal, D.; Bouriaud, O.; Gessler, A.; Coomes, D.A.

Forest Ecosystems 4 (1), 24
2017

Link

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s