Colonization of submerged macrophytes in shallow fish manipulated Lake Væng: impact of sediment composition and waterfowl grazing

doi:10.1016/0304-3770(93)90061-Z

Aquatic Botany

Volume 46, Issue 1, July 1993, Pages 1-15

https://doi.org/10.1016/0304-3770(93)90061-Z Get rights and content

Abstract

The impact of sediment composition and waterfowl grazing on colonization of submerged macrophytes in shallow biomanipulated Lake Væng was studied by means of growth experiments: curly leaved pondweed (Potamogeton crispus L.) was transplanted to separate pots containing each type of sediment found in Lake Væng, and the pots were planted at two locations, one sheltered and one exposed. Half of macrophyte pots were behind a fence to protect them against grazing by water- fowl (mainly coots, Fulica atra L.). Sediment composition had some impact on macrophyte growth, being highest on mud from the centre of the lake. The fenced-in macrophytes became up to 6.5 times longer than the unfenced macrophytes. It was concluded that macrophytes were able to grow on all substrates present in Lake Væng, but waterfowl grazing probably controlled and delayed macrophyte colonization.

References (34)

J.M. Andersen
An ignition method for determination of total phosphorus in lake sediments
Water Res.
(1976)
J.W. Barko
The growth of Myriophyllum spicatum in relation to selected characteristics of sediment and solution
Aquat. Bot.
(1983)
J.W. Barko et al.
Sediment interactions with submersed macrophyte growth and community dynamics
Aquat. Bot.
(1991)
L. Kautsky
Lifecycles of three populations of Potamogeton pectinatus at different degrees of wave exposure in the Asko area
Aquat. Bot.
(1987)
S.F. Mitchell
Primary production in a shallow eutrophic lake dominated alternatively by phytoplankton and by submerged macrophytes
Aquat. Bot.
(1989)
J. Murphy et al.
A modified single solution method for determination of phosphate in natural waters
Anal. Chim. Acta
(1962)
G.L. Phillips et al.
A mechanism to account for macrophyte decline in progressively eutrophicated freshwaters
Aquat. Bot.
(1978)
J.W. Barko et al.
Effect of organic matter additions to sediment on the growth of aquatic plants
J. Ecol.
(1983)
J.W. Barko et al.
Sediment related mechanisms and growth limitations in submersed macrophytes
Ecology
(1986)
S.R. Carpenter et al.
The macrophyte tissue nutrient pool of a hardwater eutrophic lake:implications for macrophyte harvesting
Aquat. Bot.
(1976)

G.C. Gerloff et al.

Tissue analysis as a measure of nutrient availability for the growth of angiosperm aquatic plants

Limnol. Oceanogr.

(1966)

H.J. Gons et al.

Effects of wind on a shallow ecosystem: resuspension of particles in Loosdrecht Lakes

Hydrobiol. Bull.

(1986)

B.H. Hill et al.

Aquatic macrophyte breakdown in an Appalachian river

Hydrobiologia

(1982)

M.L. Jaynes et al.

Effects of vascular and nonvascular macrophytes on a sediment redox and solute dynamics

Ecology

(1986)

E. Jeppesen et al.

Fish manipulation as a lake restoration tool in shallow, eutrophic temperate takes. 1: Cross analysis of three Danish case studies

Hydrobiologia

(1990)

E. Jeppesen et al.

Fish manipulation as a lake restoration tool in shallow, eutrophic, temperate lakes. 2: Threshold levels, long-term stability and conclusions

Hydrobiologia

(1990)

E. Jeppesen et al.

Recovery resilience following a reduction in external phosphorus loading of shallow, eutrophic Danish lakes: duration, governing factors and methods for overcoming resilience

Mem. Ist. Ital Idrobiol.

(1991)

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Colonization of submerged macrophytes in shallow fish manipulated Lake Væng: impact of sediment composition and waterfowl grazing

Abstract

Water Res.

Aquat. Bot.

Aquat. Bot.

Aquat. Bot.

Aquat. Bot.

Anal. Chim. Acta

Aquat. Bot.

Effect of organic matter additions to sediment on the growth of aquatic plants

J. Ecol.

Sediment related mechanisms and growth limitations in submersed macrophytes

Ecology

The macrophyte tissue nutrient pool of a hardwater eutrophic lake:implications for macrophyte harvesting

Aquat. Bot.

Tissue analysis as a measure of nutrient availability for the growth of angiosperm aquatic plants

Limnol. Oceanogr.

Effects of wind on a shallow ecosystem: resuspension of particles in Loosdrecht Lakes

Hydrobiol. Bull.

Aquatic macrophyte breakdown in an Appalachian river

Hydrobiologia

Effects of vascular and nonvascular macrophytes on a sediment redox and solute dynamics

Ecology

Fish manipulation as a lake restoration tool in shallow, eutrophic temperate takes. 1: Cross analysis of three Danish case studies

Hydrobiologia

Fish manipulation as a lake restoration tool in shallow, eutrophic, temperate lakes. 2: Threshold levels, long-term stability and conclusions

Hydrobiologia

Recovery resilience following a reduction in external phosphorus loading of shallow, eutrophic Danish lakes: duration, governing factors and methods for overcoming resilience

Mem. Ist. Ital Idrobiol.