“…Regarding economic changes, the World War I increased the international price of meat and wool increasing sheep numbers in Patagonia (including Río Negro province). In contrast, the consequences of the Wall Street Crash in 1929 and of the Argentina's textile crisis in the ‘1990s led to declines in wool prices and sales, reducing the number of sheep in the field (Kropff et al, 2019; Ressel & Silva, 2007). Massive snowfalls (1911, 1944/45, 1960, 1984, 2016/17), droughts (1914, 1920s, 1960s, 2004–2005 and 2007–2014) and ashfalls (1921/22, 1960, 2011 and 2015) added to the grassland degradation process since 1920s (Easdale et al, 2014; Higuera, 2016; Figure 3).…”