Comparison of -Square, Point Centered Quarter, and -Tree Sampling Methods in Pittosporum undulatum Invaded Woodlands

Table 3

Calculation of tree density at six Pittosporum undulatum dominated stands in São Miguel Island, sampled using a total of 36  m quadrats, corresponding to six 900 m² plots.

Plot	Total number of trees	P. undulatum number (%)		Total density (trees/ha)	P. undulatum (trees/ha)
1	31	24	77.4	344	267
2	124	84	67.7	1378	933
3	388	381	98.2	4311	4233
4	81	76	93.8	900	844
5	455	366	80.4	5056	4067
6	351	266	75.8	3900	2956