Lecture 3: Vegetation Sampling - Alaska Geobotany Center
Lecture 3: Vegetation Sampling - Alaska Geobotany Center
Lecture 3: Vegetation Sampling - Alaska Geobotany Center
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Density <br />
• The number of plants per unit area. Expressed as number/<br />
square meter, stems/acre, etc. <br />
• Most oZen used for trees or large plants. <br />
• An an easy concept to grasp, but very difficult to perform in <br />
some types of vegeta4on because of: <br />
(1) the difficulty of defining an individual (e.g. caespitose growth forms, <br />
plants with underground rhizomes, plants in peaty landscapes oZen <br />
have complicated stems just beneath the surface of the moss layer) <br />
(2) quadrat size affects density size because of problem of coun4ng <br />
large individuals near the boundary of the quadrat <br />
(3) it is very 4me-‐consuming in graminoid dominated systems and low-growing<br />
vegeta4on, or moss or lichen communi4es.
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