Recovery of Lake Jyväsjärvi after pollution by municipal and industrial waste waters

Salonen, Kalevi; Högmander, Pia; Keskinen, Tapio; Huttula, Timo; Palomäki, Arja

doi:10.1080/03680770.2005.11902752

Cited by 7 publications

(8 citation statements)

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“…The lake has an area of 337 ha, a maximum depth of 27 m and a mean depth of 7.2 m, and is thermally stratified in summer. Jyväsjärvi had become heavily polluted by the late 1960s, but the condition of the lake since has been progressively improving (Meriläinen et al 2003;Salonen et al 2005). Paleolimnological studies from chironomid remains indicated mesotrophic conditions in the lake even before the high anthropogenic pollution (Meriläinen et al 2003).…”

Section: Methodsmentioning

confidence: 99%

“…Paleolimnological studies from chironomid remains indicated mesotrophic conditions in the lake even before the high anthropogenic pollution (Meriläinen et al 2003). Nevertheless, the lake is still somewhat eutrophic and the concentration of total phosphorus is typically around 35-40 lg l -1 and of total nitrogen 850 lg l -1 (Salonen et al 2005). Hence, an attempt at further restoration, by biomanipulation involving mass removals of cyprinid and small percid fish species, was started by the local authorities in the spring of 2004.…”

Section: Methodsmentioning

confidence: 99%

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Altered energy flow pathways in a lake ecosystem following manipulation of fish community structure

et al. 2010

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We used carbon and nitrogen stable isotope analyses to assess the relative contributions from pelagic and littoral energy sources to higher trophic levels in a lake ecosystem before and after a major food web perturbation. The food web structure of the lake was altered when the population sizes of the most abundant fish species (small perch, roach and bream) were reduced during an attempt to improve water quality by biomanipulation. Fish removal was followed by dense year classes of young fish, which subsequently increased the utilisation of pelagic resources. This was reflected as a decrease in relative energy contribution from littoral sources and also led to more distinct pelagic and littoral food chains after fish removal. Community metrics calculated from stable isotope data indicated increased trophic diversity and occupied niche area, and reduced trophic redundancy in the food web. However, only minor changes were observed in fish trophic positions, although roach and pike occupied slightly lower trophic positions after fish removal. Despite the Jyväsjärvi ecosystem becoming more dependent on pelagic energy after fish removals, the littoral energy contribution was still substantial, particularly to certain fish species. Hence, our results support recent arguments for the importance of benthic production in lake ecosystems. More generally, our results illustrate how large-scale perturbations of food web structure can alter energy flow patterns through an entire ecosystem.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Altered energy flow pathways in a lake ecosystem following manipulation of fish community structure

et al. 2010

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“…Both Jyva¨sja¨rvi and northern Pa¨ija¨nne were heavily polluted in the 1960s and 1970s by industrial and municipal waste waters, and today are recovering from severe eutrophication (Salonen et al, 2005). The northern part of Pa¨ija¨nne was not so severely polluted as Jyva¨sja¨rvi (Merila¨inen et al, 2003) and can be considered mesotrophic, whereas Jyva¨sja¨rvi is still eutrophic .…”

Section: Methodsmentioning

confidence: 99%

Use of stable isotope analysis to evaluate the possible impact of fish migration on a lake biomanipulation

Syväranta

Keskinen

Hämäläinen

et al. 2007

Aquatic Conservation

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1. A lake restoration project involving mass fish removals was started to improve further the water quality of a lake recovering from severe eutrophication. The effectiveness of such biomanipulation as a lake management option could be compromised if removed fish are rapidly replaced by large-scale immigration from a connected lake.2. Stable isotope analysis (SIA) was used to examine the migrations of perch (Perca fluviatilis L.) and roach (Rutilus rutilus (L.)) between two connected lakes in central Finland, Jyva¨sja¨rvi and the larger Pa¨ija¨nne. Baseline d 15 N signatures in primary consumers were significantly higher in Jyva¨sja¨rvi and this difference was reflected further up the food chain in fish.3. Spring fish spawning migrations from Pa¨ija¨nne resulted in a significant decrease in mean d 15 N signatures of both perch and roach in the adjacent part of Jyva¨sja¨rvi, but by summer these mean d 15 N signatures in fish muscle tissue had increased again to match those in the rest of the lake. d 13 C signatures of both fish species were more variable and were of less value for tracking fish migrations. 4. A robust discriminant analysis was used to classify perch and roach caught from Jyva¨sja¨rvi into fish originating from either Jyva¨sja¨rvi or Pa¨ija¨nne. The greatest proportions of immigrant perch and roach in Jyva¨sja¨rvi were observed in spring 2004 (71% and 56%), when biomanipulation of Jyva¨sja¨rvi had started. Immigrant fish percentages in the following spring were considerably lower (24% and 14%, respectively), most likely due to effective biomanipulation. 5. Results indicate that the current biomanipulation has decreased the extent of the spring migration, and that immigrant fish have not significantly repopulated Jyva¨sja¨rvi after the intense fishing. More generally, the data illustrate how stable isotopes offer the possibility to track migrations of common fish species between adjacent freshwater lakes.

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“…The lake has been transformed from one of the most heavily polluted 16 lakes in Finland in the 1970s to a scenic part of the townscape of the city with high 17 recreational value (Salonen et al, 2005). Much restoration effort has been put into the 18 lake during its history, including legal obligations for the paper industry.…”

Section: Abstract 10mentioning

confidence: 99%

“…13 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 Lake Jyväsjärvi suffered from massive eutrophication in the past (Salonen et al, 2005). 8…”

Section: Abstract 10mentioning

confidence: 99%

Negligible effect of hypolimnetic oxygenation on the trophic state of Lake Jyväsjärvi, Finland

Kuha

Palomäki²,

Keskinen

2016

Limnologica

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Please cite this article as: Kuha, J.K., Palomäki, A.H., Keskinen, J.T., Karjalainen, J.S.,Negligible effect of hypolimnetic oxygenation on the trophic state of Lake Jyväsjärvi, Finland, Limnologica (2016), http://dx.doi.org/10. 1016/j.limno.2016.02.001 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.Page 1 of 26 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 2 Abstract 1Hypolimnetic oxygenation by pumping oxygen-rich surface water to the hypolimnion 2 (HLO) is a commonly used tool for the restoration of nutrient-loaded dimictic lakes. 3However, in recent years its effectiveness has been questioned. In this case study we 4 evaluated monitoring data covering a period of 23-years to show that, although 5 experimental cessation of HLO drastically changed the lake's temperature and 6 dissolved oxygen regimes, it did not significantly affect its trophic status. Thus, we 7 recommend that the limited financial resources available are better directed towards 8 further lowering the lake's external phosphorus load than continuing HLO. 9

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Recovery of Lake Jyväsjärvi after pollution by municipal and industrial waste waters

Cited by 7 publications

References 5 publications

Altered energy flow pathways in a lake ecosystem following manipulation of fish community structure

Altered energy flow pathways in a lake ecosystem following manipulation of fish community structure

Use of stable isotope analysis to evaluate the possible impact of fish migration on a lake biomanipulation

Negligible effect of hypolimnetic oxygenation on the trophic state of Lake Jyväsjärvi, Finland

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