Arctic Char &lt;i&gt;Salvelinus alpinus&lt;/i&gt;(L.) in Ireland—A Millennium Review of its Distribution and Status with Conservation Recommendations

Igoe, Fran; O'Grady, M. F.; Tierney, D. A.; Fitzmaurice, P.

doi:10.3318/bioe.2003.103.1.9

Cited by 18 publications

(26 citation statements)

References 13 publications

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“…Overall, therefore, while it may be reasonable to conclude that a proxy reference state may be estimated from the cores from Ballybeg, Egish and Inchiquin, it would not be safe to do so for Crans, Mullagh and Sillan. Historical records of the presence of the salmonid Arctic Char (Salvelinus alpinus (Linnaeus, 1758)) in Egish (Igoe et al, 2003) provide further support that the lake was in high/good status within the period dated by the core. Igoe et al (2003) also state that historical records of the presence of Arctic Char also exist for Inchiquin, and go on to suggest that eutrophication was the most likely cause of extinction of Artic Char populations at both lakes.…”

Section: Background Reference Conditionsmentioning

confidence: 87%

“…Historical records of the presence of the salmonid Arctic Char (Salvelinus alpinus (Linnaeus, 1758)) in Egish (Igoe et al, 2003) provide further support that the lake was in high/good status within the period dated by the core. Igoe et al (2003) also state that historical records of the presence of Arctic Char also exist for Inchiquin, and go on to suggest that eutrophication was the most likely cause of extinction of Artic Char populations at both lakes. The original reference for the former presence of Arctic Char at Egish and Inchiquin is Went (1945): in this reference, Egish is named Eaghish.…”

Section: Background Reference Conditionsmentioning

confidence: 87%

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Recent histories of six productive lakes in the Irish Ecoregion based on multiproxy palaeolimnological evidence

et al. 2006

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Palaeolimnological data from six mesotrophic, eutrophic and hypertrophic lakes in the Irish Ecoregion, in the form of microfossil (cladocera, diatoms and pollen) and sediment chemistry data from radiometrically dated sediment cores, were used to reconstruct past variations in lake water quality and catchment conditions. Basal sediments from sediment cores from the six sites ranged in age from the late 18th century to the early 20th century. A weighted averaging partial least squares regression model was developed to reconstruct past epilimnetic total phosphorus concentrations. The results indicate that all but one of the study sites currently are in a far more productive state compared with the beginning of the sediment core record and that those same five lakes have experienced accelerated enrichment post c. 1980. Two of the sites demonstrated long-term enrichment, in one case beginning in the late 19th century, while both eutrophication and oligotrophication have occurred at three sites. The results highlight the difficulties in applying a general temporal end-point for reference conditions and demonstrate that productive lakes in the Irish Ecoregion have complex, locally specific and often long histories of enrichment. These may not be responsive to reduced external loadings of phosphorus and, as a result, restoration could prove particularly challenging. The results also provide evidence of the ways in which palaeolimnological techniques can assist implementation of the EU Water Framework Directive.

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Section: Background Reference Conditionsmentioning

confidence: 87%

Section: Background Reference Conditionsmentioning

confidence: 87%

Recent histories of six productive lakes in the Irish Ecoregion based on multiproxy palaeolimnological evidence

et al. 2006

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“…As noted by Maitland (1995), Igoe et al (2003), Maitland et al (2007), Low et al (2011) and many others, increased algal production generated by eutrophication frequently manifests itself as increased fine sediments of algal origin deposited on stones, gravels and other substrates. As noted by Maitland (1995), Igoe et al (2003), Maitland et al (2007), Low et al (2011) and many others, increased algal production generated by eutrophication frequently manifests itself as increased fine sediments of algal origin deposited on stones, gravels and other substrates.…”

Section: West Grass Holmementioning

confidence: 91%

“…At a global level, the status and conservation of this widespread species have given concern for some time (Maitland 1995). Notably, Igoe et al (2003) emphasised the susceptibility of this species' shallow littoral spawning grounds to exposure due to falling lake levels or siltation by fine sediments. Notably, Igoe et al (2003) emphasised the susceptibility of this species' shallow littoral spawning grounds to exposure due to falling lake levels or siltation by fine sediments.…”

Section: Introductionmentioning

confidence: 99%

Distribution, characteristics and condition of Arctic charr (Salvelinus alpinus) spawning grounds in a differentially eutrophicated twin‐basin lake

Miller

Winfield

Fletcher

et al. 2014

Ecology of Freshwater Fish

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“…This pattern was indicated by Flick (1977) who stated that pike and brook trout coexistence is observed in northern but not in southern lakes. However, cases of severe impact from introduced pike on salmonids suggest that our observations of pike-driven coexistence patterns may still apply to wide geographic regions (e.g., Ireland (Went 1957;Igoe et al 2003); Spain (Rincon et al 1990); Great Britain (Maitland and Campbell 1992); northwestern United States (McMahon and Bennett 1996); California (Moyle 2002); Alaska (Dalton 2002)). …”

Section: Piscivore Rulesmentioning

confidence: 92%

Salmonid or nonsalmonid lakes: predicting the fate of northern boreal fish communities with hierarchical filters relating to a keystone piscivore

Spens

Ball

2008

Can. J. Fish. Aquat. Sci.

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We determine if lacustrine salmonids show large-scale patterns of coexistence with the keystone predator northern pike (Esox lucius) and test an approach to predict fish communities using coexistence rules set in the context of three hierarchical filters that a species must pass to be present. The mutually exclusive species distribution patterns that we detected among 1029 lakes were repeatedly verified from results of whole-lake interventions with rotenone and introductions. Essentially, pike did not coexist with self-sustaining salmonid populations in lakes. High connectivity to pike (derived from maps) largely predicts the absence of lacustrine salmonids. Our analysis strongly suggests that pike prevented selfsustaining populations of brown trout (Salmo trutta), Arctic char (Salvelinus alpinus), and brook trout (Salvelinus fontinalis) in lakes. High connectivity to pike resulted in nonsalmonid lake fish communities, most often including both European perch (Perca fluviatilis) and roach (Rutilus rutilus). Our analysis suggests that if pike were not present in many boreal lakes where they now dwell, salmonid fish assemblages would prevail, a sharp contrast from the present pike-driven homogenized state with mainly nonsalmonid fish communities.Résumé : Nous déterminons si les salmonidés lacustres possèdent des patrons de coexistence à grande échelle avec le brochet du nord (Esox lucius), leur prédateur le plus important, et nous testons une méthode pour prédire les communautés de poissons à l'aide de règles de coexistence qui comprennent trois filtres hiérarchiques qu'une espèce doit traverser pour être présente. Les patrons de répartition des espèces mutuellement exclusives que nous avons détectés dans les 1029 lacs se vérifient à répétition lors d'interventions à la roténone ou d'introductions à l'échelle des lacs entiers. En somme, les brochets ne se retrouvent pas avec des populations autosuffisantes de salmonidés dans les lacs. Une forte connectivité avec le brochet (déduite à partir de cartes géographiques) permet la plupart du temps de prédire l'absence de salmonidés lacustres. Notre analyse indique clairement que le brochet empêche l'établissement de populations autosuffisantes de truites brunes (Salmo trutta), d'ombles chevaliers (Salvelinus alpinus) et d'ombles de fontaine (Salvelinus fontinalis) dans les lacs. Une connectivité au brochet produit des communautés de poissons lacustres sans salmonidés, mais contenant souvent à la fois la perche (Perca fluviatilis) et le gardon (Rutilus rutilus). Notre analyse laisse croire que si le brochet était absent de plusieurs lacs boréaux où il habite présentement, il y aurait prédominance de peuplements de poissons salmonidés -en contraste marqué avec l'état d'homogénéité actuel des communautés de poissons non salmonidés, causé par le brochet.[Traduit par la Rédaction]

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Arctic Char <i>Salvelinus alpinus</i>(L.) in Ireland—A Millennium Review of its Distribution and Status with Conservation Recommendations

Cited by 18 publications

References 13 publications

Recent histories of six productive lakes in the Irish Ecoregion based on multiproxy palaeolimnological evidence

Recent histories of six productive lakes in the Irish Ecoregion based on multiproxy palaeolimnological evidence

Distribution, characteristics and condition of Arctic charr (Salvelinus alpinus) spawning grounds in a differentially eutrophicated twin‐basin lake

Salmonid or nonsalmonid lakes: predicting the fate of northern boreal fish communities with hierarchical filters relating to a keystone piscivore

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