A comparison of methods for estimating available understory light in forests

Drdar, Željka (2011) A comparison of methods for estimating available understory light in forests. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

The research was conducted in Medvednica Nature Park upon six different forest plots, with aim to determine comformabilities and differences between three methods for estimating understory light in forest vegetation. An additional test was made to determine the quantity of each method data, per disquisitional plot, required to obtain similar results. The examined methods were light estimating by light meter, hemispherical hotography and manual technique. Each plot was divided in nine locations, arranged in 3x3 grid, upon which data was collected. Data was processed and than five combinations have been statisticly analysed. Results have shown that there were no signifficant differences for manual technique and hemispherical photography within plots. The differences were showed for light meter which is explained by high sensitivity of the instrument. Low corelation between manual technique and other two methods was shown, which is explained by different measuring system of examined methods and possible inexperience of observer.

Item Type: Thesis (Diploma thesis)
Keywords: forest canopy, light, Medvednica, light meter, hemispherical photography
Supervisor: Jelaska, Sven
Date: 2011
Number of Pages: 40
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 02 Sep 2014 09:46
Last Modified: 17 Feb 2016 10:55
URI: http://digre.pmf.unizg.hr/id/eprint/2581

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