Changes in benthic community composition in response to reservoir aging

Abstract

The effects of reservoir aging on the benthic macroinvertebrate community in Pawnee Reservoir were documented by comparing species composition and biomass of samples collected from

Macroinvertebrate community succession in the Three-Gorges Reservoir ten years after impoundment

“…Statistical analyses demonstrated a greater variation among seasons than among years since the second year, which indicated that a seasonal pattern was formed in the macroinvertebrate community of the TGR. Hydrological stability and sedimentation are significant factors regulating the secondary succession of macroinvertebrate community in a reservoir (Popp and Hoagland, 1995;Ruhí et al, 2010). Collectively, our results lead to the assumption that waterlevel fluctuation and sedimentation may be the key factors controlling macroinvertebrate community succession of the TGR.…”

“…At the initial stage of reservoir formation that includes sediment and nutrient loading, organic substances in sediment accumulate and provide an abundance of high quality habitat and food for macroinvertebrate biomass (Popp and Hoagland, 1995). Pioneer colonists of a new reservoir are primarily facultative species from streams and ponds inundated by impoundment.…”

“…Sediment input alters macroinvertebrate habitats, giving rise to changes in community structure (Voshell and Simmons, 1984;Popp and Hoagland, 1995). Sedimentation can severely destroy the macroinvertebrate communities by degrading their food quality (Graham, 1990), impeding their normal ingestion (Cohen et al, 1993;Wood and Armitage, 1997), or even burying organisms (Wood et al, 2005).…”

Fauna de Chironomidae e outros insetos aquáticos de açudes do semi-árido paraibano, Brasil

“…Altas concentrações de sulfato e/ou amônia podem ser tóxicas para os insetos aquáticos e outros invertebrados bentônicos (Popp & Hoagland, 1995). Assim como as concentrações de Nitrato e Nitrito pode limitar a diversidade de dipteros quironomídeos.…”

Minimum Pool and Bull Trout Prey Base Investigations at Beulah Reservoir - Final Report for 2008

“…The decreases in mean Secchi depths from spring to fall were likely related to increases in primary production (Bureau of Reclamation, 2002) and to low reservoir volumes mixing with 14 incoming and re-suspended sediments (Fox and others, 1977;Popp and Hoagland, 1995). The relatively low water clarity during spring 2006 may have resulted from increased sediment inputs from tributary streams (Popp and Hoagland, 1995) and from water being released over the spillway, which facilitates nutrient exchange from deeper, nutrient-rich waters and increases primary production (Murphy, 1962). The effects of changes in water turbidity on the behavior and foraging success of bull trout are unknown.…”