aspen (Populus tremula)

We are sorry, the portraits of the tree species are only available in German, French and Italian.

NFI sample plots with species occurrences between 1983 and *

* An occurrence is only shown with a dot on the map if the selected tree or shrub species were detected in at least two inventories.

key figures

NFI4
state 2009/17
	production region
	Jura		Plateau		Pre-Alps		Alps		Southern Alps		Switzerland
topic (target variable)	mean	±	mean	±	mean	±	mean	±	mean	±	mean	±
number of stems 1000 n	57	50	130	54	53	31	680	169	330	114	1250	218
number of stems %	0.1	0.1	0.2	0.1	0.1	0.0	0.4	0.1	0.5	0.2	0.3	0.0
growing stock (stemwood) 1000 m³	72	60	68	26	16	11	260	65	213	76	629	120
growing stock (stemwood) %	0.1	0.1	0.1	0.0	0.0	0.0	0.2	0.1	0.6	0.2	0.1	0.0
growing stock (stemwood)/number of stems m³/n	1.25	0.08	0.52	0.15	0.31	0.20	0.38	0.05	0.64	0.14	0.50	0.06

The mean ± absolute standard error of the estimate is given in each case.

evaluation area: accessible forest without shrub forest

grid: 1.4 x 1.4 km grid

NFI3–NFI4
change 2004/06–2009/17
	production region
	Jura		Plateau		Pre-Alps		Alps		Southern Alps		Switzerland
topic (target variable)	mean	±	mean	±	mean	±	mean	±	mean	±	mean	±
increment (gross increment) 1000 m³/yr	4	4	5	2	1	1	10	3	10	4	29	6
fellings and mortality 1000 m³/yr	1	1	1	1	0	.	8	6	2	1	12	6

The mean ± absolute standard error of the estimate is given in each case.

evaluation area: accessible forest without shrub forest NFI3/NFI4

grid: 1.4 x 1.4 km grid