Effect of pH, iron and aluminum on survival of early life history stages of the endangered freshwater pearl mussel,<i>Margaritifera margaritifera</i>

Taskinen, Jouni; Berg, Paul R.; Saarinen-Valta, Mari; Välilä, Santtu; Mäenpää, Eero; Myllynen, K.; Pakkala, Jesse J.

doi:10.1080/02772248.2011.610798

Cited by 25 publications

(17 citation statements)

References 23 publications

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“…Even after the improvement of Lake Orta conditions and the neutralization of pH values accomplished by liming (1989)(1990), studies documenting the progressive recovery of both pelagic and benthic populations (Baudo et al, 2001a;Bielli and Tesauro, 2001;Nocentini et al, 2001) failed to reveal the presence of mussels or any other molluscs. Since mussels are highly sensitive to acidification (Økland and Økland, 1986;Taskinen et al, 2011), ammonia (Augspurger et al, 2003;Wang et al, 2008) and heavy metals (Naimo, 1995;Keller et al, 2006), particularly at the earlier life stages (Wang et al, 2007a(Wang et al, , 2007bCope et al, 2008;Cleawater et al, 2014), the high sediment toxicity, that did not improved but was rather worsened by liming, likely hindered recolonization. Furthermore, once extirpated from a water body, mussels are not able to recolonize easily, particularly if they lack access to restocking populations (Strayer et al, 2004), due to constraints related to their complex life cycle.…”

Section: Discussionmentioning

confidence: 99%

“…Since released glochidia larvae are more vulnerable to contaminants than glochidia attached to fish, or juvenile mussels (Taskinen et al, 2011), it seemed very important to try to define what conditions proved to be sufficient for Unio to re-colonize. Searching for an answer about the time of the supposed introduction, we estimated the age of individuals chosen by different size classes.…”

Section: Discussionmentioning

confidence: 99%

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When and how? Freshwater mussel recolonization in Lake Orta

et al. 2016

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Thanks to a video posted on a social network, live mussels of Unio elongatulus, have been recorded from Lake Orta (Italy) over one century after the last (and only) report. With its long and well documented history of pollution, Lake Orta offers the opportunity to document the post-extirpation recovery of freshwater unionid mussels. This case evidences that recovery/recolonization is possible despite a high devastation in the past, and permits to evaluate how fast recolonization may occur, in which way, and in what conditions. The answer to the how fast was sought by estimating the age of the larger and seemingly older individuals of the population. To address the in which way we compared the haplotypes of Lake Orta specimens of Unio elongatulus (the only species present) with those of surrounding populations. We concluded that, since Lake Orta lacks a direct connection with the putative source populations, colonizing mussels were almost certainly transported by fish carrying glochidia that were used for lake restocking after liming. Data from the long-term monitoring of water chemistry and sediments have allowed defining what conditions proved to be suitable for survival making possible the start of mussels recovery. But not only water and sediment quality matters for mussels recovery, which was delayed by nearly ten years after the reappearance of fish. This delay reflects the need of the whole trophic chain to be reestablished to allow the survival of the suitable and healthy host-fish populations necessary for mussels reproduction.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

When and how? Freshwater mussel recolonization in Lake Orta

et al. 2016

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“…oligotrophic, silicate streams) and in situations in which the success of restoration measures or chances of reintroduction are to be assessed. Generally, the freshwater pearl mussel is notably one of the most sensitive freshwater organisms, reacting highly sensitive to changes in abiotic habitat conditions (Bauer, 1988;Geist, 2010;Geist and Auerswald, 2007;Hastie et al, 2000;Oesterling et al, 2008;Taskinen et al, 2011). Due to the high conservation status and mostly small population sizes, the availability of adult individuals is low.…”

Section: Conclusion For Bioindication and Conservationmentioning

confidence: 97%

Influence of stock origin and environmental conditions on the survival and growth of juvenile freshwater pearl mussels (Margaritifera margaritifera) in a cross-exposure experiment

Denic¹,

Taeubert²,

Lange

et al. 2015

Limnologica

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Please cite this article as: Denic, M., Tauebert, J.-E., Lange, M., Thielen, F., Scheder, C., Gumpinger, C., Geist, J.,Influence of stock origin and environmental conditions on the survival and growth of juvenile freshwater pearl mussels (Margaritifera margaritifera) in a cross-exposure experiment, Limnologica (2014), http://dx. AbstractThe freshwater pearl mussel (Margaritifera margaritifera) is a highly specialized and sensitive freshwater bivalve, whose survival in the juvenile phase is indicative of high quality habitats. This contribution investigates the use of juvenile freshwater pearl mussels as bioindicators, considering the influence of mussel stock and study stream conditions on juvenile performance, as described by survival and growth rates. A standardized cross experiment was carried out investigating juvenile performance in four different pearl mussel stocks originating from the Rhine, Danube and Elbe drainages, representing distinct genetic conservation units. The juveniles were exposed in five study streams which were selected to integrate pearl mussel streams with different water qualities and recruitment status of the mussel population. Per study stream, five standard mesh cages containing an equal number of 20 (10 x 2) juvenile pearl mussels per stock in separate chambers were installed. Survival and growth rates of juveniles were checked after three months (i.e. before their first winter) and after nine months (i.e. after their first winter). Mussel stock and study stream conditions significantly influenced juvenile performance. Growth rates were determined by study stream conditions and increased with stream water temperature, organic carbon and C/N ratios.Survival rates varied stock-specifically, indicating different levels of local adaptation to their native streams. Due to the detection of stream-specific differences in juvenile performance, freshwater pearl mussels appear suitable as bioindicators. However, a careful of consideration of stock-specificity is necessary to avoid false interpretation of bioindication results. The comparison of stock-specific survival in native versus non-native streams implicates that exposure of juveniles outside their native habitats is able to increase breeding success or else serve for risk spreading in breeding programs.

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“…There is a wide variety of contaminants that can potentially affect freshwater mussels, despite the small number of studies that explicitly address this issue in European species. In general, free glochidia larvae are more vulnerable to pollutants than glochidia attached to fish, or juvenile mussels and adults (Bringolf et al, 2007;Taskinen et al, 2011). The effects of point-source contamination can be highly detrimental to freshwater mussels, as was the case with a heavy metal spill in River Tisza in 2000, which probably affected freshwater mussel populations (Fleit & Lakatos, 2003).…”

Section: (C) Pollution and Eutrophicationmentioning

confidence: 99%

Conservation status of freshwater mussels in Europe: state of the art and future challenges

et al. 2016

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Freshwater mussels of the Order Unionida provide important ecosystem functions and services, yet many of their populations are in decline. We comprehensively review the status of the 16 currently recognized species in Europe, collating for the first time their life-history traits, distribution, conservation status, habitat preferences, and main threats in order to suggest future management actions. In northern, central, and eastern Europe, a relatively homogeneous species composition is found in most basins. In southern Europe, despite the lower species richness, spatially restricted species make these basins a high conservation priority. Information on freshwater mussels in Europe is unevenly distributed with considerable differences in data quality and quantity among countries and species. To make conservation more effective in the future, we suggest greater international cooperation using standardized protocols and methods to monitor and manage European freshwater mussel diversity. Such an approach will not only help conserve this vulnerable group but also, through the protection of these important organisms, will offer wider benefits to freshwater ecosystems.

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Effect of pH, iron and aluminum on survival of early life history stages of the endangered freshwater pearl mussel,Margaritifera margaritifera

Cited by 25 publications

References 23 publications

When and how? Freshwater mussel recolonization in Lake Orta

When and how? Freshwater mussel recolonization in Lake Orta

Influence of stock origin and environmental conditions on the survival and growth of juvenile freshwater pearl mussels (Margaritifera margaritifera) in a cross-exposure experiment

Conservation status of freshwater mussels in Europe: state of the art and future challenges

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