主题词：Aquatic Ecosystems and Phytoplankton Dynamics; Freshwater macroinvertebrate diversity and ecology; Aquatic Invertebrate Ecology and Behavior; Fish Ecology and Management Studies; Mediterranean and Iberian flora and fauna; Diatoms and Algae Research; Historical and socio-economic studies of Spain and related regions; Water Quality and Pollution Assessment; Marine and coastal ecosystems; Fish Biology and Ecology Studies; Fish biology, ecology, and behavior; Water Resource Management and Quality; Hydrology and Sediment Transport Processes; Marine Biology and Ecology Research; Hydrology and Watershed Management Studies; Soil and Water Nutrient Dynamics; Environmental Toxicology and Ecotoxicology; Archaeological and Historical Studies; Soil erosion and sediment transport; Geology and Paleoclimatology Research; Microbial Community Ecology and Physiology; Geological and Geophysical Studies Worldwide; Urbanism, Landscape, and Tourism Studies; Environmental and Cultural Studies in Latin America and Beyond; Protist diversity and phylogeny