Research Article
Changes of Species Richness in Heathland Communities over 15 Years following Disturbances
Figure 4
Canonical Correspondence Analysis (CCA) for plant species composition and environment variables (zones, experimental treatments, and time). Variance explained: 46% axis I, 25% axis II; Monte Carlo permutation test: F = 35.61; . Environmental variables abbreviations are: zone A (dashed shape), zone B (grey shape), zone C (empty shape); burning: diamond; cutting: square; ploughing: triangle; time: numbers representing years after experimental disturbances. Arrows mark the environmental coordinates. Name of species: CAMU: Carex muricata; DEFL: Deschampsia flexuosa; ERTE: Erica tetralix; GASA: Galium saxatile; JUSQ: Juncus squarrosus; NAST: Nardus stricta; POER: Potentilla erecta; VAMY: Vaccinium myrtillus; CAVU: Calluna vulgaris; CEJA: Centaurea janeri; DACA: Daucus carota; ERAR: Erica arborea; FIVU: Filipendula vulgaris; LOCO: Lotus corniculatus; PLHO: Plantago holosteum; THZY: Thymus zygis; VIRI: Viola riviniana; ERAU: Erica australis; ARUV: Arctostaphylos uva-ursi; CHTR: Chamaespartium tridentatum; ERUM: Erica umbellata; HAAL: Halimium alyssoides; HAUM: Halimium umbellatum; QUPY: Quercus pyrenaica.
