Variation (2) Variabilité (2) Dynamics (1) Deterioration (1) Breeding (1) Agriculture (1) Biodiversity (1) Groundwater (1) Water (1) Runoff (1) Renewable natural resources (1) Rain and rainfall (1) Lakes (1) Impact (1) Etiquette (1) Droughts (1) Soils (1) Social life and customs (1) Population (1) Land tenure (1) Fishing (1) Animales--Mejora genética (1) Biodiversidad (1) Ganadería (1) Lagos (1) Etiqueta (1) Pesca deportiva (1) Dinámica (1) Suelos (1) Aguas subterráneas (1)