Inter- and intraspecific variation of carbon and nitrogen stable isotope ratios in freshwater bivalves

Novais, Adriana; Dias, Ester; Sousa, Ronaldo

doi:10.1007/s10750-015-2408-9

Cited by 27 publications

(28 citation statements)

References 58 publications

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“…1 and Table S1, Supporting information to a generalised decline in the number of populations and individuals; thus, the Minho and Southern Iberian MUs should receive a special consideration due to their restricted distributions. The presence of dams and the impacts generated by invasive species, mainly of the Asian clam Corbicula fluminea (Müller 1774), are usually described as the main threats to U. delphinus in the Minho basin (Sousa et al 2007(Sousa et al , 2008Novais et al 2016). Also, special care should be addressed to the populations in the South where besides the negative impacts of dams and pollution, water resources are scarce due to overexploitation for human consumption (Company et al 2008).…”

Section: Phylogeography and Population Geneticsmentioning

confidence: 99%

Who lives where? Molecular and morphometric analyses clarify which Unio species (Unionida, Mollusca) inhabit the southwestern Palearctic

et al. 2016

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Many doubts still exist about which freshwater mussel Unio species inhabit Northwest Africa. While some authors refer to the presence of Unio delphinus in the Atlantic North African basins of Morocco, a recent International Union for Conservation of Nature (IUCN) assessment performed on Moroccan Unio species, recognised the existence of a distinct species, Unio foucauldianus, with a critically endangered conservation status. The present study delivered new genetic, morphological, and geographical distribution data on two Unio species (i.e. U. delphinus and U. foucauldianus) greatly increasing the almost non-existent data on these taxa. Bayesian phylogenetic analysis revealed two highly supported geographically concordant clades, which diverged by 3.2 ± 0.6 % (uncorrected p distance): the first distributed across Iberia and corresponding to U. delphinus, and the second distributed across Morocco, corresponding to U. foucauldianus. These results were corroborated by the analysis of ten newly developed microsatellite loci as well as shell morphometry. We suggest that the IUCN critically endangered conservation status of U. foucauldianus should be revised and probably down-listed since its actual distribution is much wider than previously described. Phylogenetic relationships with the other Unio species were resolved, showing that U. delphinus and U. foucauldianus fall inside the pictorum lineage. The estimated molecular rate reported herein (0.265 ± 0.06 % per million years) represents the first for the Unionida and could be used as a reference in future studies.Electronic supplementary material The online version of this article

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Section: Phylogeography and Population Geneticsmentioning

confidence: 99%

Who lives where? Molecular and morphometric analyses clarify which Unio species (Unionida, Mollusca) inhabit the southwestern Palearctic

et al. 2016

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“…It is supposed that introductions of other freshwater bivalves are particularly problematic for native freshwater mussels (Baker & Levinton, 2003;Ricciardi, Neves, & Rasmussen, 1998;Sousa, Novais, Costa, & Strayer, 2014;Sousa, Pilotto, & Aldridge, 2011). The introduction of bivalve species can lead to competition with native species for space, nutrients, food, and possibly also for host fish, the latter of which are necessary for completion of the freshwater mussel life cycle (Arey, 1932;Barnhart, Haag, & Roston, 2008;Kat, 1984;Novais, Dias, & Sousa, 2016;Sousa et al, 2014). Unionid freshwater mussels produce parasitic larvae (glochidia) that must attach to fish to complete their development into juveniles (Dillon, 2000).…”

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confidence: 99%

Invasive Chinese pond mussel Sinanodonta woodiana threatens native mussel reproduction by inducing cross‐resistance of host fish

Donrovich

Douda

Plechingerová

et al. 2017

Aquatic Conservation

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The effects of invasive alien species (IAS) on host–affiliate relationships are often subtle and remain unnoticed or insufficiently quantified. The global decline of freshwater unionid mussel species has been attributed to many causes, but little is known about the interactions of IAS, with their complex life cycle, which includes an obligatory parasitic stage (the glochidium) that develops on fishes. The capacity of a European freshwater mussel, Anodonta anatina, to develop on its widespread fish host, Squalius cephalus was tested experimentally, after previous infestations by the IAS, Sinanodonta (Anodonta) woodiana. The initial attachment of glochidia, the length of the parasitic period, and the metamorphosis success rate of A. anatina glochidia were compared among treatments of different priming infestation intensities. The metamorphosis success rate of the native A. anatina glochidia was strongly reduced (Wilcoxon Signed‐Rank Test, P < 0.001) and declined by 42.1 and 45.4% on fish hosts that were previously exposed to S. woodiana by single and multiple priming infestations, respectively, in comparison with the control group. Such cross‐resistance is expected to decrease significantly the quality of the host resources available to native mussels. This study provides the first evidence of the host‐mediated adverse impact of invasive S. woodiana on native mussel species. These results also highlight the importance of potential competition for hosts between threatened groups of affiliate species and their invasive counterparts, which should be reflected in conservation strategies.

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“…Species within the suspension-feeding guild have considerable overlap in the size of particles they can acquire. Yet, some suspension feeders do partition available food resources to minimize interspecific competition (Peterson 1982, Lesser et al 1992, Kang et al 2009, Lacoste et al 2016, Novais et al 2016. We propose that in this study, the bivalve polyculture removed more suspended seston than monocultures due to variations in particle capture processes and differences in dietary requirements or preferences exhibited by the 4 focal species.…”

Section: Effect Of Species Diversity On Particle Clearancementioning

confidence: 75%

“…Since evolution shapes populations towards more efficient resource use (Duffy et al 2016), the functional niches of a given species within a guild do not always neatly overlap, resulting in niche complementarity (Rosenfeld 2002). Species within the bivalve suspension-feeding guild compete for suspended particles, but variations in particle selection adaptations that partition the available food resources among taxa would minimize interspecific competition (Lesser et al 1992, Riera et al 2002, Novais et al 2016.…”

Section: Introductionmentioning

confidence: 99%

Effect of species diversity on particle clearance and productivity in farmed bivalves

Acquafredda

Munroe²

2020

Mar. Ecol. Prog. Ser.

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Most bivalve farms are designed as monocultures, yet diverse communities often outperform monocultures in various metrics of ecosystem functioning, including particle clearance and productivity. This study tested the feasibility of bivalve polyculture by examining particle clearance, growth, and survival of 4 species that are economically important to the northeastern USA. Three particle depletion experiments were conducted to determine if more diverse bivalve assemblages had greater clearance rates than those which were less diverse. Different assemblages of Crassostrea virginica, Spisula solidissima, Mercenaria mercenaria, and Mya arenaria were supplied with a single cultured algal species, a mix of 2 cultured algal species, or natural seston. To determine how species richness affects bivalve productivity, growth and survival were monitored in a flow-through mesocosm experiment, which simulated farm conditions. In the cultured algae experiments, more diverse assemblages did not exhibit significantly greater clearance rates than those that were less diverse. Instead, the clearance rates of each species were additive across assemblages. Surprisingly, most assemblages did not display a significant preference for the larger microalgae species, Pavlova lutheri (4.0-6.0 µm), over Nannochloropsis oculata (1.90-3.75 µm). Most notably, when supplied with natural seston, the 4-species polyculture demonstrated a significantly greater tank-level clearance rate for particles <25 µm compared to most monocultures. However, nearly all productivity metrics were not significantly affected by species richness. This work suggests that some degree of complementarity exists among these bivalves, and that in non-food limited systems, these bivalves could be co-cultured without outcompeting one another.

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Inter- and intraspecific variation of carbon and nitrogen stable isotope ratios in freshwater bivalves

Cited by 27 publications

References 58 publications

Who lives where? Molecular and morphometric analyses clarify which Unio species (Unionida, Mollusca) inhabit the southwestern Palearctic

Who lives where? Molecular and morphometric analyses clarify which Unio species (Unionida, Mollusca) inhabit the southwestern Palearctic

Invasive Chinese pond mussel Sinanodonta woodiana threatens native mussel reproduction by inducing cross‐resistance of host fish

Effect of species diversity on particle clearance and productivity in farmed bivalves

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