Effects of Eutrophication on Salmonid Communities in Oligotrophic Lakes

Colby, Peter J.; Spangler, George R.; Hurley, Donal A.; McCombie, A. M.

doi:10.1139/f72-141

Cited by 124 publications

(68 citation statements)

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“…Anthropogenic eutrophication was a worldwide problem during the second half of the 20th century, and it affected many lakes dominated by coregonids (Christie 1972;Colby et al 1972;Grimås et al 1972). In many of these lakes, eutrophication has been successfully abated in the meantime, and the lakes have returned or are returning to preeutrophication levels ).…”

Section: Discussionmentioning

confidence: 99%

The influence of eutrophication and population biomass on common whitefish (Coregonus lavaretus) growth — the Lake Constance example revisited

Thomas¹,

Eckmann²

2007

Can. J. Fish. Aquat. Sci.

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Accelerated growth of freshwater fish during anthropogenic eutrophication has been attributed almost exclusively to the increased nutrient content, while density-dependent effects have been largely neglected. We evaluated the relative importance of these factors by studying the growth of 43 consecutive year classes of common whitefish (Coregonus lavaretus) from Upper Lake Constance. This prealpine lake underwent eutrophication from the 1950s to 1970s, followed by reoligotrophication. Because whitefish are harvested with gill nets in a strongly size-selective way, we used back-calculated lengths of average fast-growing fish to compare growth among cohorts. Standing stock biomass was estimated based upon virtual year-class strengths. Multiple linear regression analysis revealed that growth of whitefish during their second year was most strongly related to standing stock biomass followed by PO 4 -P content during spring turnover and by calendar year, which was incorporated as a third independent variable (adjusted R 2 = 0.84). The negative correlation between whitefish growth rate and calendar year is interpreted as evidence of an evolutionary response to the highly size-selective fishery during at least four decades. We conclude that density-dependent effects on whitefish growth are more important than had been realized previously and that the impact of eutrophication on growth of whitefish needs to be reconsidered.Résumé : La croissance accélérée des poissons d'eau douce dans les conditions d'eutrophisation anthropique a été attribuée presque exclusivement à l'augmentation du contenu en nutriments; en revanche, les effets reliés à la densité ont été en grande partie négligés. Nous évaluons l'importance relative de ces facteurs dans une étude de la croissance de 43 classes d'âge consécutives de corégones lavarets (Coregonus lavaretus) du lac supérieur de Constance. Ce lac préalpin a subi une eutrophisation des années 1950 aux années 1970, suivie d'une ré-oligotrophisation. Parce que les corégones sont récoltés dans des filets maillants qui font une forte sélection en fonction de la taille, nous avons utilisé les longueurs obtenues par rétro-calcul de poissons moyens à croissance rapide pour comparer la croissance entre les cohortes. Nous avons estimé la biomasse du stock d'après les forces des classes d'âge virtuelles. Une analyse de ré-gression multiple linéaire montre que la croissance des corégones durant leur seconde année est surtout reliée à la biomasse du stock, puis au contenu de P-PO 4 durant le brassage du printemps et à l'année du calendrier qui a été incorporée à l'analyse comme troisième variable indépendante (R 2 ajusté = 0,84). Nous interprétons la corrélation négative qui existe entre la croissance des corégones et l'année du calendrier comme une indication de la réponse évolutive à la pêche très sélective au cours d'au moins de quatre décennies. Nous concluons que les effets reliés à la densité sur la croissance des corégones sont plus importants qu'on ne le croyait antérieurement et qu'...

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Section: Discussionmentioning

confidence: 99%

The influence of eutrophication and population biomass on common whitefish (Coregonus lavaretus) growth — the Lake Constance example revisited

Thomas¹,

Eckmann²

2007

Can. J. Fish. Aquat. Sci.

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“…The first theoretical ichthyocoenose models bound community shifts with trophic status, but they were developed for northern, initially oligotrophic, temperate lakes (Colby et al 1972, Prejs 1978) and thus were not appropriate for European reservoirs, as concluded by Kubečka (1993). Reservoirs can be eutrophicated from the moment of their origin, the biotic interactions are more complex and influenced by more dynamic hydrological regimes and management practices than in natural lakes (Hrbaček 1984, Straškraba 1998, Wagner et al 2009).…”

Section: Discussionmentioning

confidence: 99%

Long-term changes in the fish community structure revealed by gillnet monitoring in a shallow, lowland reservoir

Kaczkowski¹,

Frankiewicz²

2017

Acta Ichthyol. Piscat.

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Kaczkowski Z., Frankiewicz P. 2017. Long-term changes in the fish community structure revealed by gillnet monitoring in a shallow, lowland reservoir. Acta Ichthyol. Piscat. 47 (3): 279-288.Background. Fish communities can support or hinder water quality management. Sulejów Reservoir, which is situated on the Pilica River in Central Poland, serves as a strategic reserve of drinking water for the Łódź Agglomeration. Precise knowledge of the long-term dynamics of the structure of the fish community, what was the aim of this study, is important for proper management to slow the eutrophication of the reservoir and prevent toxic algal blooms. Materials and methods.To determine fish species composition, multimesh gill nets with mesh sizes ranging from 11 to 80 mm were used. From 1993 to 2015, gillnetting was conducted 1-2 times per month from June through November in two representative parts of the reservoir, and principal component analysis (PCA) was applied to explore the temporal variation in fish community structure expressed as the relative contribution of each species to the total fish biomass.Results. Dominance fluctuated among four species in the fish community: common bream, Abramis brama (Linnaeus, 1758); roach, Rutilus rutilus (Linnaeus, 1758); white bream, Blicca bjoerkna (Linnaeus, 1758); and pike-perch, Sander lucioperca (Linnaeus, 1758). PCA revealed three principal components with eigenvalues larger than one that explained 73.3% of the observed variance in the temporal changes in fish community composition. A negative correlation was found between pike-perch biomass and roach biomass (r = 0.82), while a positive correlation was observed between the biomass of pike-perch and that of common bream (r = 0.73). Consequently, there was a highly negative correlation between the biomasses of common bream and roach (r = 0.80). Furthermore, an interesting temporal pattern was observed; from 1993 to 2000, the fish community was dominated by common bream and pike-perch but then shifted towards domination by roach and white bream, despite declining phosphorous and carbon concentrations. Recently, this trend has been reversed, and a more balanced fish community structure has been established. Conclusion. Fish community succession, which is usually reported to be a one-directional process in reservoirs, i.e., from a riverine fish or percid-dominated to a cyprinid (bream)-dominated state, was more ambiguous in Sulejów Reservoir. This was likely a consequence of both restoration issues related to decreasing nutrient loads and the influence of zebra mussel, Dreissena polymorpha invasion on the trophic relations in the reservoir.

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“…Fish species composition of lakes are generally affected by eutrophication, (e.g. COLBY et al, 1972), shore line degradation, migration barriers (RUHLÉ, 1996), and acidification Ecological Assessment of Lakes (SCHINDLER et al, 1989;RASK and TUUNAINEN, 1990). A significant ecological deficit in the species composition is the extinction of Arctic char in Irrsee as a result of the eutrophication and subsequent hypolimnic oxygen deficits during the 1970ies and 1980ies (JAGSCH, 1987).…”

Section: Species Compositionmentioning

confidence: 99%

Ecological Integrity Assessment of Lakes Using Fish Communities – Suggestions of New Metrics Developed in Two Austrian Prealpine Lakes

Gassner¹,

Tischler

Wanzenböck

2003

International Review of Hydrobiology

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An ecological assessment method for lakes based on fish communities similar to the IBI-system was developed and further tested on two Austrian prealpine lakes. Important quality criteria used were species composition, reproductive success, size structure and total fish biomass. The reference status of each lake was established by the reconstruction of the native fish community and the native total fish biomass.In Hallstättersee only minor deviations from the reference status could be observed. Additionally to the 12 native (reconstructed) fish species two exotic species were found inhabiting this lake. There was no change in the number of intolerant fish species and for 10 native fish species reproduction success was confirmed.The fish community of Irrsee differed to a higher extent from the reference status. Three native fish species were missing. Seven exotic species were confirmed by catches and four of these are reproducing in Irrsee. No reproductive success could be verified for five native species. The sum of scores in our proposed scoring system revealed a value of 92 points for Hallstättersee, which corresponds to a "high ecological status" and of 60 points for Irrsee, which corresponds to a "moderate ecological status" of the fish community.

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Effects of Eutrophication on Salmonid Communities in Oligotrophic Lakes

Cited by 124 publications

References 0 publications

The influence of eutrophication and population biomass on common whitefish (Coregonus lavaretus) growth — the Lake Constance example revisited

The influence of eutrophication and population biomass on common whitefish (Coregonus lavaretus) growth — the Lake Constance example revisited

Long-term changes in the fish community structure revealed by gillnet monitoring in a shallow, lowland reservoir

Ecological Integrity Assessment of Lakes Using Fish Communities – Suggestions of New Metrics Developed in Two Austrian Prealpine Lakes

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