Individual and population‐level food consumption by cyprinids and percids in a mesotrophic lake

Tolonen, Kimmo; Karjalainen, Juha; Staff, S.; Leppä, Markus

doi:10.1111/j.1600-0633.2000.eff090304.x

Cited by 23 publications

(19 citation statements)

References 44 publications

(58 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Benthivorous and particularly detritivorous fish can affect water quality and development of algae in the water column by releasing nutrients from the bottom (Andersson et al, 1978;Ta`trai and Istva`novits, 1986;Horpila and Kairesalo, 1990;Ta`trai et al, 1990;Persson and Hamrin, 1994). A direct effect on turbidity by re-suspension of bottom particles has also been reported (Meijer et al, 1990;Tolonen et al, 2000). Nowadays, water transparency is markedly lower in Laguna Blanca compared with previous data (4-5 m in Daciuk (1968) and in ), and present values (41 m) are lower than those obtained in fishless lakes (Table 1).…”

Section: Discussioncontrasting

confidence: 69%

See 1 more Smart Citation

Is the decline of birds and amphibians in a steppe lake of northern Patagonia a consequence of limnological changes following fish introduction?

Ortubay

Cussac

Battini

et al. 2005

Aquatic Conserv: Mar. Freshw. Ecosyst.

View full text Add to dashboard Cite

ABSTRACT1. Laguna Blanca, in Laguna Blanca National Park, is a lake in Patagonia which has been designated as a Ramsar site since 1971 because of bird diversity and abundance and importance for nesting, particularly for the black neck swan, Cygnus melanocoryphus. It is also valued for its populations of endemic amphibians, Atelognathus patagonicus and Atelognathus praebasalticus.2. Avian and amphibian populations have decreased dramatically in recent years. Percichthys colhuapiensis, Percichthys trucha (Pisces, Percichthyidae), Salmo trutta and Oncorhynchus mykiss (Pisces, Salmonidae) were introduced into Laguna Blanca in 1965. Since 1986, no Atelognathus frogs have been found. The abundance of swans and coots, which are strongly associated with macrophytes for nesting and feeding, has diminished drastically, whereas piscivorous birds have increased.3. The fishless condition of some neighbouring small lakes with abundant pond weeds, aquatic birds and endemic amphibians, was assessed in order to compare the physical and chemical characteristics and the quantitative composition of the benthos among lakes. Fish presence at Laguna Blanca and its absence at El Burro, Antin˜ir and Jabo´n lakes, were confirmed. Compared with previous results, it seems that the abundance of Amphipoda (Hyalella), Copepoda and Cladocera at Laguna Blanca has decreased, while Acari has increased and Notostraca has disappeared. Water transparency has diminished in Laguna Blanca and now is lower than that of fishless lakes.4. P. colhuapiensis were captured only in Laguna Blanca, with the highest captures in the littoral zone. The population shows rapid individual growth in the early years and an absence of fish older than 6 years. The preponderance of benthos and the presence of macrophytes in the gut contents of adult P. colhuapiensis appear to indicate that they are important consumers of these resources.

show abstract

Section: Discussioncontrasting

confidence: 69%

“…comm.) but previous results of such restoration practices have shown a lapse of 3 to 4 yr before changes occur (Tolonen et al, 2000).…”

Section: Discussionmentioning

confidence: 96%

Is the decline of birds and amphibians in a steppe lake of northern Patagonia a consequence of limnological changes following fish introduction?

Ortubay

Cussac

Battini

et al. 2005

Aquatic Conserv: Mar. Freshw. Ecosyst.

View full text Add to dashboard Cite

show abstract

“…Bream especially are known to be responsible for an increase of suspended sediment and nutrient concentrations in the water of a whole lake (Tolonen et al 2000). Unfortunately, no exact data are available on the biomass and activity of these fish in the littoral of Lake Constance.…”

Section: Sediment Resuspension In the Littoral Zonementioning

confidence: 99%

Methane Release through Resuspension of Littoral Sediment

Bussmann

2005

Biogeochemistry

View full text Add to dashboard Cite

Sediment in the littoral zone of lakes is frequently disturbed by wave action or bioturbation, resulting in sediment resuspension. In undisturbed sediment, methanotrophic bacteria efficiently reduce the diffusive flux of methane into the water column. In a microcosm study, the resuspension of littoral sediment was simulated in sediment cores for a winter (n = 3) and a summer situation (n = 3). The erosion of surface sediment resulted in a large flux of methane into the overlying water (207 ± 176 lmol h À1 m À2 in winter and 73 ± 18 lmol h À1 m À2 in summer). Only a minor part (16 ± 7%) of the methane released was oxidized by methanotrophic bacteria, whereas the major part escaped into the water column. Only 6-16% of the littoral zone has to be resuspended to reach the same flux as from undisturbed littoral sediment. For the daily flux, a sediment resuspension has to last 1-4 h to reach the undisturbed daily flux. The study reveals the important role of sediment resuspension in the littoral methane cycle as an intense but variable source of methane of largely unknown magnitude.

show abstract

“…Both the smaller biomass and the changed fish assemblage may have wideranging effects on the ecosystem functioning (Tolonen et al, 2000). Since the piscivores are often gape-limited (e.g.…”

Section: Fish Communitymentioning

confidence: 99%

Effects of Biomanipulation on Fish and Plankton Communities in Ten Eutrophic Lakes of Southern Finland

Olin

Rask²,

Ruuhijärvi³

et al. 2006

Hydrobiologia

View full text Add to dashboard Cite

The effects of biomanipulation were studied in ten Finnish lakes to determine responses in fish and plankton communities and water quality after mass removal of cyprinids. From 1997 to 2001, the fish communities shifted from the dominance of large cyprinids to an explosion of small cyprinids and a higher proportion of piscivores in effectively biomanipulated lakes (>200 kg ha )1 3 yr )1 ). The biomass of cyanobacteria decreased, and the duration of the blooms shortened and shifted towards the autumn. Decreased concentrations and slower cycling of nutrients and increased grazing by cladocerans probably affected the declined biomass of cyanobacteria. Less intensive sediment disturbance and increased phosphorus-retention in fast growing fish biomass may have turned the role of the fish assemblage from 'nutrient recycler' to 'nutrient storage'. Increased potential grazing pressure, higher proportion of edible algae, and lower chlorophyll a:total phosphorus ratio indicated strengthened herbivore control. A high mass removal catch in relation to trophic state, low background turbidity, and bearable external loading favoured the successful biomanipulation, whereas intensive cyprinid reproduction, high nutrient loading and non-algal turbidity hindered the recovery. Three important issues should be noticed before biomanipulation in Finland: (1) careful selection of target lake, (2) well-planned, effective and long-lasting biomanipulation and (3) sustainable management of piscivores.

show abstract

Individual and population‐level food consumption by cyprinids and percids in a mesotrophic lake

Cited by 23 publications

References 44 publications

Is the decline of birds and amphibians in a steppe lake of northern Patagonia a consequence of limnological changes following fish introduction?

Is the decline of birds and amphibians in a steppe lake of northern Patagonia a consequence of limnological changes following fish introduction?

Methane Release through Resuspension of Littoral Sediment

Effects of Biomanipulation on Fish and Plankton Communities in Ten Eutrophic Lakes of Southern Finland

Contact Info

Product

Resources

About