Ethnobotanical Knowledge of Nostocales and its Contribution to the SDGS

Abstract

Objectives: This study explores the botanical and ethnobotanical knowledge, uses, and geobotanical distribution of Nostocales algae in high Andean communities of Huancavelica, Peru. It aims to document local knowledge and usage and understand the algae's distribution in relation to environmental conditions. Theoretical Framework: Nostocales algae are recognized for their nutritional and biomolecular value, with applications in human nutrition, animal feed, and environmental contexts. Understanding traditional and modern uses highlights their cultural and economic importance. Method: Data was collected through surveys of 610 individuals and botanical records using a photo-documentary herbarium, assessing local knowledge, usage patterns, and environmental distribution. Results and Discussion: Findings reveal that high Andean residents have significant knowledge about Nostocales algae, particularly Nostoc commune (34%) and Nostoc spp. (28%). The algae, known locally as "llullucha" are found in streams, consumed fresh, and sold at $1.80/kg. High knowledge levels are found among adult males with primary education. The algae are used as food for humans and animals and for economic support, with applications in fresh, dried, and processed forms. Geobotanically, Nostoc commune is common at altitudes between 4400 and 5320 meters, with temperatures of 4-10°C and relative humidity of 20-60%, thriving in puna and mountainous regions. Research Implications: It underscores the significance of Nostocales algae in local diets and economies, providing valuable data for conservation and sustainable management. Originality: It offers new geobotanical records and insights into local knowledge and uses, contributing to the understanding of these algae's cultural and economic roles in Peru.