Abstract The Atchafalaya River Basin (ARB) in southcentral Louisiana, USA, is a structurally and biotically diverse floodplain of (AR), which the largest distributary Mississippi River. Annual inundation facilitates exchange nutrients organic material between AR its floodplain, giving rise to high productivity river-floodplain system. Production within ARB driven by periphytic algae, phytoplank...

Knowledge on interactions among microbial communities colonizing various streambed substrata (e.g. cobbles, sediment, leaf-litter etc.) is essential when investigating the functioning of stream ecosystems. However, these are often forgotten assessing responses aquatic to chemical contamination. Using a microcosm approach, respective impact two sulfonamide antibiotics (sulfamethoxazole and sulfa...