“…The weathered bedrock zone contains both unsaturated and saturated zones, is typically many meters thick, and is a potentially large plant‐accessible water storage reservoir (e.g., Graham et al, 2010; Hahm, 2019; Rempe & Dietrich, 2018; Schwinning, 2010). In Mediterranean climates—where plants rely on subsurface water storage that is infrequently recharged during the prolonged summer dry season—weathered bedrock has been identified as a key water source for plant transpiration (Anderson et al, 1995; Arkley, 1981; Baldocchi et al, 2004; Bales et al, 2011; Eliades et al, 2018; Dralle et al, 2020; Hahm, Rempe, et al, 2019; Hubbert et al, 2001; Lewis & Burgy, 1964; Miller et al, 2010; Rempe & Dietrich, 2018; Rose et al, 2003; Salve et al, 2012; Zunzunegui et al, 2018; Zwieniecki & Newton, 1996).…”