Cited by 3Ecology and Vegetation Dynamics StudiesAquatic Invertebrate Ecology and BehaviorFish Ecology and Management Studies

Environmental gradients drive convergence in life history strategies among disparate but coevolved taxonomic groups

Open access
Atkinson, Carla L., Franzen, Alex J., Hopper, Garrett W., Lopez, Jonathan W., Zbinden, Zachery D., Vaughn, Caryn C.·2025·Ecology

Abstract

Trait-based approaches can improve ecological understanding by linking fitness to the environment. The trilateral life history model is an expansion of r- and K-selection theory that reflects trade-offs between juvenile survival, fecundity, and generation time and describes differential survival of species across environmental gradients. We used this framework to generate and test hypotheses regarding community assembly and the validity of such a model in two disparate taxonomic groups, freshwater mussels and fish. We assessed the distribution of mussel and fish life history strategies across 80 sites spanning aspects of the river continuum concept within the Ouachita Highlands (USA) and asked if their distributions are predicted by a similar life history strategy framework. Because mussel and fish assemblages should both be structured by selective forces in an up- to downstream trajectory, we expected both taxa to converge on more species-rich assemblages with a greater proportion of equilibrium strategists in larger, more stable downstream habitats. We found that both mussel and fish species richness increased with watershed area as well as the proportion of equilibrium strategists in the assemblages. Our study validates the use of the trilateral life history model to test hypotheses about the distribution patterns of two coevolved taxonomic groups.

Integrity signals

Registry

Crossref · 10.1002/ecy.70273

Cites

43 of 43 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

2 of 26 cited sources checked · 1 supported · 0 flagged · accuracy not yet measured

  • Premisecitation

    Fish assemblage structure can influence mussel assemblage structure and abundance.

    “Because of this host-parasite relationship, fish assemblage structure can influence mussel assemblage structure and abundance (Schwalb et al., 2013;Vaughn & Taylor, 2000;Watters, 1992).”
    Quote in the paperSubstantial claim1 of 3 sources checked
    • cites Schwalb et al., 2013 source
    • cites Vaughn & Taylor, 2000 source
    • cites Watters, 1992 source
  • Premisecitation

    The number of fish species in a watershed or at the site scale predicts mussel species richness.

    “Indeed, previous work has found that the number of fish species in a watershed or at the site scale predicts mussel species richness (Dascher et al., 2018;Schwalb et al., 2013;Vaughn & Taylor, 2000;Watters, 1992).”
    Quote in the paperSubstantial claim1 of 3 sources checked
    • cites Dascher et al., 2018 source
    • cites Schwalb et al., 2013 source

      The Results (page not available in our copy) show that host-fish presence explained variation in mussel species composition across watersheds. The Introduction reports that fish richness was an important factor in a previous study of mussel community structure. Neither passage establishes that the number of fish species predicts mussel species richness at the watershed or site scale. (LLM, conf=0.86)

      Experimental — accuracy not yet measured
    • cites Vaughn & Taylor, 2000 source
  • Findingown data

    The proportion of the fish assemblage composed of equilibrium species increased with watershed area.

    “Similarly, the proportion of the fish assemblage composed of equilibrium species increased with watershed area (Figure 2D; R 2 = 0.10, F 1,80 = 10.47,p = 0.0013, y = 0.052x + 0. 37).”
    • Also stated in: § Abstract · plain
      “We found that both mussel and fish species richness increased with watershed area as well as the proportion of equilibrium strategists in the assemblages.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: The trilateral life history model's three strategies are exhaustive and mutually exclusive for both mussels and fish.
  • Findingown data

    Stream slope was an important factor impacting mussel assemblage composition.

    “Our joint plot analysis indicated that watershed area was an important contributing factor for both mussel and fish assemblages (r 2 = 0.49, p < 0.001, r 2 = 0.16, p = 0.004) and stream slope was also an important factor impacting mussel assemblage composition (r 2 = 0.23, p = 0.001).”
    Quote in the paperSubstantial claim
  • Findingown data

    NMDS analysis revealed structuring of mussel assemblages by Strahler stream order.

    “Our NMDS analysis revealed some structuring of mussel (Appendix S1: Figure S2A) and fish (Appendix S1: Figure S2B) assemblages by Strahler stream order.”
    Quote in the paperNot a substantial claim
  • May combine two claims. 6
  • Classified as probably not a substantial claim. 5
  • May combine two claims.

    Interpretationcitation

    Larger rivers promote a larger number of species with different traits and species with traits that are adaptive for those conditions, such as longer-lived species.

    “Larger rivers have more predictable flow regimes and greater habitat heterogeneity (Ward, 1998) promoting a larger number of species with different traits and species with traits that are adaptive for those conditions (e.g., longer lived).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Ward, 1998 source
  • Classified as probably not a substantial claim.

    Study design and conductcitation

    Mussel species were assigned to the equilibrium, periodic, or opportunistic life history strategy as in Haag (2012).

    “Mussel species were assigned to the equilibrium, periodic, or opportunistic life history strategy (Appendix S1: Table S1) as in Haag (2012).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Haag (2012) source
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Interpretationcitation

    The positive relationship between mussel and fish species richness and watershed area could be due to both greater habitat availability and more stable environments typically associated with larger streams.

    “The positive relationship between mussel and fish species richness and watershed area could be due to both greater habitat availability and more stable environments typically associated with larger streams (McHugh et al., 2010).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites McHugh et al., 2010 source
  • May combine two claims.

    Premisecitation

    Mussels depend on host fish for dispersal and are only abundant and diverse where fish are abundant and diverse.

    “Because mussel adults are sedentary, mussels depend on host fish for dispersal and are only abundant and diverse where fish are abundant and diverse (Haag, 2012).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Haag, 2012 source
  • Classified as probably not a substantial claim.

    Premisecitation

    The trilateral life history model reflects trade-offs between juvenile survival, fecundity, and generation time.

    “The trilateral life history model reflects trade-offs between juvenile survival, fecundity, and generation time (Figure 1A; Haag, 2012;Winemiller & Rose, 1992) and was originally developed from analysis of life history variation in fishes and later applied to other taxa including mussels (Haag, 2012;Moore et al., 2021).”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites Haag, 2012 source
    • cites Winemiller & Rose, 1992 source
  • May combine two claims.

    Premisecitation

    Larger rivers have more predictable flow regimes and greater habitat heterogeneity.

    “Larger rivers have more predictable flow regimes and greater habitat heterogeneity (Ward, 1998) promoting a larger number of species with different traits and species with traits that are adaptive for those conditions (e.g., longer lived).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Ward, 1998 source
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    The trilateral life history model was originally developed from analysis of life history variation in fishes and later applied to other taxa including mussels.

    “The trilateral life history model reflects trade-offs between juvenile survival, fecundity, and generation time (Figure 1A; Haag, 2012;Winemiller & Rose, 1992) and was originally developed from analysis of life history variation in fishes and later applied to other taxa including mussels (Haag, 2012;Moore et al., 2021).”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Haag, 2012 source
    • cites Moore et al., 2021 source
  • Classified as probably not a substantial claim.

    Study design and conductcitation

    Fish species were assigned to the equilibrium, periodic, or opportunistic life history strategy as in Winemiller and Rose (1992) and Mims and Olden (2012).

    “Fish species were assigned to the equilibrium, periodic, or opportunistic life history strategy (see Appendix S1: Methods and Table S2) as in Winemiller and Rose (1992) and Mims and Olden (2012).”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites Winemiller and Rose (1992) source
    • cites Mims and Olden (2012) source
  • May combine two claims.

    Premisecitation

    Equilibrium species are longer lived and have late maturity and are better adapted to larger rivers.

    “That corroborates with a study on freshwater mussels in a different region (i.e., upper Mississippi River basin; Hornbach et al., 2024) as equilibrium species are longer lived and have late maturity and are better adapted to larger rivers.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Hornbach et al., 2024 source
9 of 9
  • The paper relies on this without support.

    The trilateral life history model's three strategies are exhaustive and mutually exclusive for both mussels and fish.

    “Mussel species were assigned to the equilibrium, periodic, or opportunistic life history strategy (Appendix S1: Table S1) as in Haag (2012).”
    “Fish species were assigned to the equilibrium, periodic, or opportunistic life history strategy (see Appendix S1: Methods and Table S2) as in Winemiller and Rose (1992) and Mims and Olden (2012).”
  • The paper relies on this without support.

    The temporal difference in mussel and fish sampling does not confound comparisons of assemblage composition.

    “We surveyed mussels across 92 sites in the Kiamichi and Little River watersheds of southeastern Oklahoma between 1999 and 2021 (Appendix S1: Figure S1).”
    “We sampled 82 sites for fishes in the Kiamichi and Little River watersheds in 2014 and 2015 via seining (Zbinden et al., 2022).”
  • The paper relies on this without support.

    The sampled sites are representative of the river continuum in the Ouachita Highlands.

    “Our study area included the Kiamichi and Little River watersheds in the Ouachita Highlands of southeastern Oklahoma, USA (Appendix S1: Figure S1; Vaughn et al., 2023).”
  • The paper relies on this without support.

    Fish and mussel assemblages at a site are structured primarily by the same environmental gradients, such as stream size and disturbance, rather than by unmeasured factors.

    “We assessed the distribution of mussel and fish life history strategies across 80 sites spanning aspects of the river continuum concept within the Ouachita Highlands (USA) and asked if their distributions are predicted by a similar life history strategy framework.”
4 of 4

Cites

Flagged first, then by citations

Research works printed but not linked: 4

  1. Hocutt C. H., 1986, The Zoogeography of North American Freshwater Fishes
  2. R Core Team, 2021, R: A Language and Environment for Statistical Computing
  3. Vaughn C. C., 1997, Conservation and Management of Freshwater Mussels II: Initiatives for the Future, Proceedings of an Upper Mississippi River Conservation Committee (UMRCC) symposium, 16–18 October 1995, St. Louis, MO, 157
  4. Zbinden Z. D., 2022, Fish Communities, Species of Greatest Conservation Need, and Protected Areas in Southeastern Oklahoma, 2014–2016, Proceedings of the Oklahoma Academy of Science, 101, 14

Cited by

Sorted by citations

Authors
Atkinson, C. L., Franzen, A. J., Hopper, G. W., Lopez, J. W., Zbinden, Z. D., & Vaughn, C. C.
Affiliations
  • University of Alabama (US)
  • Oklahoma Biological Survey (US)
  • Louisiana State University (US)
  • University of Maryland Center for Environmental Science (US)
Corresponding author
Atkinson, Carla L.
Venue
Ecology
Publisher
Wiley
Published
2025-12
Volume
106
Issue
12
Pages
e70273-e70273
ISSN
  • 0012-9658 (ISSN-L)
  • 1939-9170
OpenAlex
W4417156412
Cited by
3
References
41
Citations by year
2026: 3
FWCI
1.92
Type
journal article
Language
en
Open access
Locations
  • Ecology (publishedVersion, public-domain)
  • PubMed (publishedVersion)
Funders
  • U.S. Fish and Wildlife Service
  • Directorate for Biological Sciences (DEB1457542, DEB2043012, DEB9306687, DEB9870092)
  • Nature Conservancy
  • National Science Foundation
  • U.S. Forest Service
Topics
  • Physical Sciences › Environmental Science › Nature and Landscape Conservation › Ecology and Vegetation Dynamics Studies
  • Physical Sciences › Environmental Science › Ecology › Aquatic Invertebrate Ecology and Behavior
  • Physical Sciences › Environmental Science › Nature and Landscape Conservation › Fish Ecology and Management Studies
Keywords
r/K selection, life history strategies, environmental gradients, community assembly, freshwater mussels, fish, river continuum, species richness, coevolution, habitat stability, drainage area
MeSH terms
Life History Traits, Animals, Biological Evolution, Fishes, Models, Biological, Ecosystem, Rivers, Bivalvia

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