Under-ice drift of invertebrates in the piedmont part of Kedrovaya River (Primorskii Krai)

Богатов, В. В.; Astakhov, M. V.

doi:10.1134/s1995082911010032

Cited by 7 publications

(4 citation statements)

References 4 publications

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“…However, the majority of previous studies have looked at invertebrate drift in the summer months and found lower rates of drift during the day than at night ( Anderson, 1966 ; Bishop, 1969 ; Flecker, 1992 ; Brewin & Ormerod, 1994 ); reviewed in Svendsen, Quinn & Kolbe (2004) . However, the few studies that have analyzed invertebrate drift patterns in fall and winter have found that diurnal drift is higher than nocturnal drift ( Williams, 1990 ; Bogatov & Astakhov, 2011 ).…”

Section: Discussionmentioning

confidence: 99%

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Artificial light and nocturnal activity in gammarids

Perkin

Hölker

Heller

et al. 2014

PeerJ

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Artificial light is gaining attention as a potential stressor to aquatic ecosystems. Artificial lights located near streams increase light levels experienced by stream invertebrates and we hypothesized light would depress night drift rates. We also hypothesized that the effect of light on drift rates would decrease over time as the invertebrates acclimated to the new light level over the course of one month’s exposure. These hypotheses were tested by placing Gammarus spp. in eight, 75 m × 1 m artificial flumes. One flume was exposed to strong (416 lx) artificial light at night. This strong light created a gradient between 4.19 and 0.04 lx over the neighboring six artificial flumes, while a control flume was completely covered with black plastic at night. Night-time light measurements taken in the Berlin area confirm that half the flumes were at light levels experienced by urban aquatic invertebrates. Surprisingly, no light treatment affected gammarid drift rates. In contrast, physical activity measurements of in situ individually caged G. roeseli showed they increased short-term activity levels in nights of complete darkness and decreased activity levels in brightly lit flumes. Both nocturnal and diurnal drift increased, and day drift rates were unexpectadly higher than nocturnal drift.

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Section: Discussionmentioning

confidence: 99%

“…Finally, it is possible that the patterns in day and night drift were driven by seasonal changes. Bogatov & Astakhov (2011) saw increases in day relative to night drift during the winter in a far-northern Russian river. The increase in day drift coincided with the icing over of the river, leading to lower light levels in the water.…”

Section: Discussionmentioning

confidence: 99%

Artificial light and nocturnal activity in gammarids

Perkin

Hölker

Heller

et al. 2014

PeerJ

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“…That is why the active drift of most invertebrates occurs in the night time. However, year-round research carried out in the Kedrovaya River showed that, in contrast to the warm season, in conditions of ice cover a large movement of organisms within a water column was observed also in daytime, and the number of daytime drifters exceeded those at night [22,23]. It is likely that in the cold season, with conditions of low feeding activity among fish, the effectiveness of daylight invertebrate drift is no lower than at night, especially for the less visible smallest individuals [17].…”

Section: Discussionmentioning

confidence: 99%

Vertical redistribution of drifting benthic invertebrates in the Kedrovaya River, Primorsky Region of Russia

Astakhov¹,

Богатов²

2014

OJE

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The vertical distribution of morphologically different drifting invertebrates (mayfly and dipteran larvae) in a small salmon river was studied. Drifting invertebrates were caught with the Astakhov's sampler equipped with three driftnets placed one above another. The average annual drift rate in different levels of a water column was practically the same, while the drift density decreased from the bottom to the surface. Over the course of 24 hours, the drifting organisms did not show clear preference for a particular water layer. Invertebrates were constantly redistributed between the upper and lower levels at approximately 30-90 min intervals. This redistribution appears to be linked to the fact that invertebrates of the same taxa, which entered into water column from different bottom sites become active at different times.

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“…Typical pattern in drift activity (with the total number of drifting invertebrates higher at night than by day) was observed during the frost-free period [Astakhov, 2008]. However, after the decline of the highest daily air temperature to subzero values and the onset of the freeze-up period, daytime drifters began to prevail [Astakhov, 2009;Bogatov, Astakhov, 2011]. Most likely this resulted from reducing illuminance of the water column during daylight (to the level of crepuscular illumination) because of ice and snow covering the river channel.…”

Section: Discussionmentioning

confidence: 99%

Stratifying Drift Sampler

Astakhov

2012

AZJ

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A new drift sampler construction and a procedure for its usage on stream sites with depth up to 0.6 m all year, and at deeper sites during the ice-cover period have been described. This device gives an opportunity to collect samples separately from distinct layers of water column, which is important for study of vertical distribution in drift. Резюме. Описывается конструкция нового дрифтоотборника и техника его использования на речных участках глубиной до 0,6 м круглогодично и на более глубоких участках в период ледостава. Описанное устройство дает возможность дифференцированного отбора материала из разных слоев водной толщи, что важно при исследовании вертикального распределения дрейфующих организмов.

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Under-ice drift of invertebrates in the piedmont part of Kedrovaya River (Primorskii Krai)

Cited by 7 publications

References 4 publications

Artificial light and nocturnal activity in gammarids

Artificial light and nocturnal activity in gammarids

Vertical redistribution of drifting benthic invertebrates in the Kedrovaya River, Primorsky Region of Russia

Stratifying Drift Sampler

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