Figure 3From: Biological traits and community patterns of Trichoptera at two Patagonian headwater streams affected by volcanic ash deposition Relative abundance of the main functional feeding groups for Nant y Fall and Chiquito Streams (Patagonia, Argentina). Comparing three seasons (June: winter; October: spring, and February: summer) in consecutive years (2007 to 2009). Pre-eruption data in first column (marked with arrow) and post-eruption data in second and third column.Back to article page