Abstract:<p>In semi-arid and arid environments, clonal plants occasionally appear in ring patterns with a barren soil centre. There is a general agreement that this pattern forms when ramets grow radially, leaving a dead centre where the parent plant once was. Nevertheless, there is still some controversy over the nature of water source-sink relations in and around the rings, and the mechanism that drive the ring formation. We studied Asphodelus ramosus rings in two sites with different soil types (sand a… Show more
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