To investigate the influence of eutrophication on organochlorine dynamics in lotic systems, we related polychlorinated biphenyl (PCB) concentrations in brown trout (Salmo trutta) to the periphyton density and total phosphorus concentrations (Tot-P) in 10 Swedish rivers. Tot-P concentrations in the water ranged from 37 6 4 to 156 6 51 mg L21. Periphyton density in the rivers during the experimen...

Mercury methylation and/or demethylation have been observed in several compartments [soil (saturated soils covered by standing water), floc, periphyton, and water] of the Everglades, a wetland with mercury as one of the major water quality concerns. However, it is still unclear which compartment is the major source or sink due to the lack of estimation and comparison of the net methylmercury (M...

The water quality, habitats, and biota of streams in the upper Animas River watershed of Colorado, USA, are affected by metal contamination associated with acid drainage. We determined metal concentrations in components of the food web of the Animas River and its tributaries-periphyton (aufwuchs), benthic invertebrates, and livers of brook trout (Salvelinus fontinalis)-and evaluated pathways of...

Measurements of groundwater–surface water exchange at three wetland stream sites were related to patterns in benthic productivity as part of the US Geological Survey’s Northern Temperate Lakes–Water, Energy and Biogeochemical Budgets (NTL–WEBB) project. The three sites included one high groundwater discharge (HGD) site, one weak groundwater discharge (WGD) site, and one groundwater recharge (GR...

Abstract Nuisance periphyton blooms are occurring in oligotrophic lakes worldwide, but few have documented changes biomass through monitoring. For decades has caused concern about Lake Tahoe’s nearshore water quality. To determine whether eulittoral increased Tahoe, measures of and dominant communities at 0.5 m below lake level been monitored regularly nine shoreline sites starting 1982, with u...

Over the past three decades, Rideau River (Ontario, Canada) watershed has experienced a land-use change from rural and agricultural land towards urban land, introduction expansion of invasive species. This study examined spatial temporal patterns periphyton biomass (chlorophyll-a ash-free dry mass) collected riffle zones in 1995 2019 along 66-km stretch River. also long-term changes water nutri...