Associations among elements in freshwater mussel shells (Unionidae) and their relation to morphology and life history

Hopper, Garrett W.; Dickinson, Gabriella K.; Atkinson, Carla L.

doi:10.1111/fwb.13807

Cited by 8 publications

(4 citation statements)

References 67 publications

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“…Isotope analysis assumes that species have similar turnover rates and that if different mussels within or among species consume the same food source their isotopic signature will be identical (Karlson et al, 2015). Despite being in the same functional group, mussel species have different stoichiometric requirements that are linked to their growth rates (Atkinson et al, 2020; Hopper, Dickinson, & Atkinson, 2021), which could lead to differences in isotopic fractioning and signatures among species. Mussel responses to changes in food availability and other environmental stressors are understudied (Aldridge et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

Niche specialization and community niche space increase with species richness in filter‐feeder assemblages

et al. 2023

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Ecological theory posits that higher species richness should be associated with greater exploitation of resources and niche packing resulting from either increasing species niche overlap or specialization of species' niches. Research evaluating niche theory in animals tends to focus on organisms among functional feeding guilds, while resource partitioning might be more critical within functional groups. Freshwater mussels (Family: Unionidae) are a diverse and imperiled group of animals that are ideal models to test niche occupancy due to their functional similarity as filter‐feeders and their occurrence in spatially and temporally stable multispecies aggregations. We evaluated the relationship between species richness and the trophic niche area for 25 mussel species occurring in 22 aggregations in the southeastern United States using stable isotope analysis (δ13C and δ15N) of soft tissue (n = 1057). Mean species standard ellipse area decreased with species richness, whereas ellipse overlap was not related to richness, indicating increased niche specialization may be the primary mechanism allowing coexistence in species‐rich communities. Total community isotopic area increased with richness, suggesting species‐rich communities also use a broader range of resources and may not be species‐saturated. Overall, our data support the niche‐packing hypothesis by illustrating the importance of niche partitioning within a species‐rich guild of aquatic animals.

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Section: Discussionmentioning

confidence: 99%

Niche specialization and community niche space increase with species richness in filter‐feeder assemblages

et al. 2023

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“…Moreover, some gastropods have truly become terrestrial, like a portion of Stylommatophora slugs, this order containing more than 112 families with a total of about 3,000 species, is a main group of Gastropoda (Saadi et al, 2021). In those several groups, their large different morphological characteristics and classifications suggest that they colonized novel environments independently (Yang et al, 2018;Hopper et al, 2021). However, the times of their colonization and the stimulative factors of colonization are quite uncertain.…”

Section: Introductionmentioning

confidence: 99%

Out of the ocean: the timescale of molluscan evolution based on phylogenomics revealed the ages of mollusks’ evolutionary transitions into the novel environment

Han,

Sun,

Wang

et al. 2024

Front. Ecol. Evol.

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Being the phylum with the second largest biodiversity, mollusks are widely distributed in marine, freshwater, and land, conquered almost all habitats on the earth. Throughout geological time, several molluscan lineages independently colonized freshwater and land, evolving independently in new habitats. Resolving the timing of their colonization for novel environments is the basis of understanding the complex evolution of Mollusca. Herein, we obtained an elaborate single–copy orthologs set including 107 genes with a total length of 3,447,675 amino acid sites across 134 mollusks to reconstruct the phylogeny of Mollusca. The phylogenetic analysis recovered the “Aculifera+ Conchifera” topology with well–supported. By the divergence times estimation with fossil calibration, we revealed Cambrian rapid diversification of all molluscan classes. What’s more, our results provided the times of three major independent colonization of novel environments and consistent with previous studies. The freshwater mussels (Bivalvia: Unionida) colonized freshwater about 233 Mya, ancient origin and late diversification make this order to become the main represent of the freshwater bivalves. The orders Stylommatophora and Basommatophora (Gastropoda: Pulmonata) respectively colonized land and freshwater about 201 Mya, the Triassic–Jurassic mass extinction may have provided the opportunities for their colonization. Ampullariidae (Gastropoda) colonized freshwater about 156 Mya, their lungs may have contributed to the adaption of tropical freshwater environment and make them survive. Our results probably offer the most comprehensive time–scale of molluscan evolution, could provide some insights into the habitat transition and evolution of Mollusca.

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“…RNA and DNA) and is also correlated with apatite in bony structure and with phosphocreatine in the muscle of vertebrates (Breves & Schroder, 1991 ). In recent years, ecological stoichiometry has begun to move beyond the three important elements C, N and P(Hopper et al, 2021 ; Penuelas et al, 2019 ). For example, calcium (Ca) is also important for understanding ecological interactions between organisms and resource availability (Jones et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

“…However, there was a paucity of knowledge about the environmental‐related variation of elemental allocation among tissues, particularly among P and Ca‐rich morphological traits (e.g. bone and scute) (see Hopper et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Environmental‐related variation of stoichiometric traits in body and organs of non‐native sailfin catfishes Pterygoplichthys spp

Wei

Liang

Luo

et al. 2022

Ecology and Evolution

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Intraspecific variation in stoichiometric traits was thought to be an adaptive response to reduce the elemental imbalance between organism and diet in the habitat. Studying the spatial variation of stoichiometric traits of non‐native species and the factors contributing to the variation could help to better understand the invasion mechanism of non‐native fish. In this study, stoichiometric traits (i.e. carbon [C], phosphorus [P], calcium [Ca] and their ratios) variation in the body and organs of non‐native sailfin catfishes Pterygoplichthys spp. were investigated across 13 river sections in the main river basins of Guangdong province. The relationships between environmental factors and stoichiometric traits were analyzed using a general linear model and an information‐theoretic approach. A manipulated feeding experiment was conducted to investigate the impact of food quality on the stoichiometry of sailfin catfishes in a greenhouse. Sailfin catfishes exhibited considerable variability in body and organ elemental composition. Site identity was the main factor contributing to the variation, which could be explained by a combination of environmental factors including climate, diet quality, fish species richness and trophic status in the invaded rivers. Water chemistry (i.e. total nitrogen and phosphorus, ammonia nitrogen and soluble reactive phosphorus) contributed to the most variation of stoichiometric traits. Imbalances of P and Ca between sailfin catfishes and food resources varied among sampling sites, reflecting the spatial heterogeneity of nutrients limitation. Juvenile sailfin catfishes exhibited stoichiometric homeostasis (0 < 1/H < 0.25) for all elemental contents and ratios in the feeding experiment. These findings suggested variation in stoichiometric traits of sailfin catfishes might be attributed to the changes in elemental metabolism to cope with context‐specific environments. This study provided heuristic knowledge about environmental‐related variation in stoichiometric traits, which could enhance the understanding of the non‐native species' adaptation to resource fluctuation in the invaded ecosystems.

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Associations among elements in freshwater mussel shells (Unionidae) and their relation to morphology and life history

Abstract: 1. Biogeochemical ecology of organisms typically focuses on C, N, and P despite c.

Cited by 8 publications

References 67 publications

Niche specialization and community niche space increase with species richness in filter‐feeder assemblages

Niche specialization and community niche space increase with species richness in filter‐feeder assemblages

Out of the ocean: the timescale of molluscan evolution based on phylogenomics revealed the ages of mollusks’ evolutionary transitions into the novel environment

Environmental‐related variation of stoichiometric traits in body and organs of non‐native sailfin catfishes Pterygoplichthys spp

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