Fourteen years of dreissenid presence in the rocky littoral zone of a large lake: effects on macroinvertebrate abundance and diversity

Abstract The research of zooplankton diversity, abundance and trophic structure was conducted during the summer period in pelagial zone on the longitudinal profile of the Sutla River Backwater. Investigated site consists of two interconnected basins: transparent Upper Basin with submerged macrophytes and turbid Lower Basin without macrophytes in the littoral zone. In the Upper Basin, abundance and diversity of zooplankton in the pelagial was higher in comparison to the Lower Basin, with prevailing species of genus Keratella as microfilter-feeder, and genera of Polyartha and Trihocerca as macrofilter-feeder rotifers. On the contrary, in the Lower Basin, crustaceans dominated in abundance. Microfilter-feeder cladoceran (Bosmina longirostris) and larval and adult stages of macrofilter-feeder copepod (Macrocyclops albidus) prevailed in the Lower Basin. Fish predation pressure was more pronounced in the pelagial of the Upper Basin, indicated by low cladoceran abundance in the surface layer. Although the studied basins were interconnected, results indicate significant (Mann-Whitney U test, p < 0.05) differences in the zooplankton structure as a potential result of the macrophyte impact on environmental conditions and fish predation pressure.

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High-frequency internal waves in the littoral zone of a large lake

Limnology and Oceanography ◽

10.4319/lo.2006.51.4.1935 ◽

2006 ◽

Vol 51 (4) ◽

pp. 1935-1939 ◽

Cited By ~ 12

Author(s):

Andreas Lorke ◽

Frank Peeters ◽

Erich Bäuerle

Keyword(s):

Internal Waves ◽

High Frequency ◽

Littoral Zone ◽

Large Lake

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Complex spatial and temporal patterns of littoral benthic communities interacting with water level fluctuations and wind exposure in the littoral zone of a large lake

Fundamental and Applied Limnology / Archiv für Hydrobiologie ◽

10.1127/1863-9135/2007/0169-0115 ◽

2007 ◽

Vol 169 (2) ◽

pp. 115-129 ◽

Cited By ~ 24

Author(s):

Nicole Scheifhacken ◽

Christian Fiek ◽

Karl-Otto Rothhaupt

Keyword(s):

Water Level ◽

Littoral Zone ◽

Benthic Communities ◽

Temporal Patterns ◽

Water Level Fluctuations ◽

Large Lake ◽

Spatial And Temporal Patterns ◽

Wind Exposure

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Are there hot spots for Elliptio complanata in the shallow littoral zone of a large Canadian Shield lake?

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f06-100 ◽

2006 ◽

Vol 63 (9) ◽

pp. 2137-2147 ◽

Cited By ~ 15

Author(s):

Natalie A Griffiths ◽

Hélène Cyr

Keyword(s):

Growth Rate ◽

Body Size ◽

Hot Spots ◽

Littoral Zone ◽

Negative Relationship ◽

Morphological Characteristics ◽

Lake Basin ◽

Large Lake ◽

Habitat Conditions ◽

Elliptio Complanata

The variability in habitat conditions in large lake basins may provide areas favourable for unionid recruitment and growth. Here we test whether the distribution, body size, and growth rate of Elliptio complanata differ between upwind and downwind sites in a 5.8 km long lake basin. We measured density and morphological characteristics of E. complanata at nine upwind and nine downwind sites. We also measured growth rates and stable isotope (δ13C, δ15N) signatures at three upwind and three downwind sites. We found no difference in density or body size of E. complanata between upwind and downwind sites, despite clear differences in water temperature and food availability. Contrary to our expectations, the growth rate of E. complanata was higher (by 62%) at upwind sites. The reason for this difference is uncertain, but higher shell erosion and a negative relationship between δ13C and C/N ratio suggest that E. complanata may be more stressed at downwind sites. The δ15N of E. complanata did not differ systematically between upwind and downwind sites, but increased with increasing body size. It would therefore be prudent to standardize the size of E. complanata used to measure the baseline of lake food webs.

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