Fig. 3

Temporal distribution of ECM diversity at Puechabon in control plots from December 2007 to June 2009. a Distribution of frequencies of ECM taxa (i.e. sampled once vs. twice vs. three vs. four different periods) expressed using either number of taxa (black bars) or numbers of ECM tips (white bars). b, c Distribution of ECM taxa according to their phenological patterns, based on occurrence (b) and abundance (c) data: seasonal specific taxa are sampled only in spring or only in fall, with no significant difference in abundance; seasonal preferential taxa are mainly sampled during spring or fall, with significant difference in abundance; all season taxa are indifferently sampled in spring and fall, with no significant difference in abundance. Values are expressed in percentages of the whole community