28 December 2016

PAR Measurements Characterize Tree Coverages

The Center for Forest Research and Extension Andean Patagonian (CIEFAP) studies forest systems and land suitable for forestry in the Andean region of Patagonia Argentina. The center does research to contribute to sustainable development in the Patagonia region. Recently, CIEFAP has been studying the relationship between tree coverage and the survival and initial growth of native Andean-Patagonian forest species.

Map showing area of study (Andes region)

The study is determining the % of PAR (under canopy/open sky) differing health of species are receiving to determine the % of PAR related to survival and initial growth. To do this study CIEFAP measured under canopy PAR using an Apogee MQ-301 line quantum sensor and open sky PAR using a ceptometer at different sites and times of day.

Finding locations to take under canopy PAR measurements using MQ-301 Apogee MQ-301 Line Quantum Meter


The results are still being evaluated, however, at this point CIEFAP has been able to determine that species receiving 50 to 60 % open sky PAR have the best survival and initial growth. Once the study is concluded CIEFAP will be able to use its data to make recommendations for the restoration of degraded forests.

Application Summary

Studying % of PAR (under canopy/open sky) and its relation to survival and initial growth of native forest species.

Sensors Used
MQ-301 Line Quantum Sensor

Center for Forest Research and Extension Andean Patagonian (CIEFAP)

Andean region of Patagonia Argentina



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