Supplementary data for: Lock and dam construction changes a large river fish assemblage structure
Data files
Mar 06, 2026 version files 15.35 KB
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README.md
2.61 KB
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Table_S1.csv
4.71 KB
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Table_S2.csv
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Table_S3.csv
3.90 KB
Abstract
The Southeastern United States is rich in freshwater diversity. However, habitat alteration has a profound impact on fish assemblages across this region. The Red River, Louisiana has historically been diverse in fishes. In the 1980’s and 1990’s five lock and dams were constructed on the Red River to facilitate watercraft traffic. To assess assemblage changes attributable to lock and dam construction, we analyzed historical survey data from the Red River between 1966 and 2002. We compared changes in assemblages following lock and dam construction using species composition and richness, life history strategies, Rao’s quadratic entropy, and functional redundancy. The results showed similar species richness across time but assemblages composition shifts after dam construction with distinct periods corresponding to pre-construction, during construction, and post-construction of lock and dams. Life history analyses were similar, with the time periods after dam construction showing a rapid decline in Periodic species and an increase in Equilibrium species. Rao’s quadratic entropy also decreased in the periods after dam construction with a simultaneous increase in functional redundancy. In utilizing multiple methods we were able to detect different aspects of assemblage change across both taxonomic and functional metrics with high duration temporal data. These results link life history theory to environmental changes and provide an empirical basis that may be used to asses or predict change of large river fish assemblages under alteration of lock and dam construction.
https://doi.org/10.5061/dryad.bcc2fqzkk
Supplementary data includes presence/absence matrix of fish species by year used in the study and life history trait values and hard life history strategy classifications for all species used in this study.
Description of the data and file structure
Table_S1 and Table_S2 contain the presence/absence matrix for the two study periods, 1966-1985 and 1986-2002. Data is arranged in matrix format with species as rows and years as columns. Presence/absence is represented as binary (1= present, 0= absent).
Table_S3 contains the life history traits and life history classifications for all species in the study. Description of columns is listed below.
Species: Column containing scientific names of species present in study.
Total length (cm): Maximum reported total length of species in centimeters.
Maturation (years): Reported age of sexual maturity for species in years.
Longevity (years): Reported max age of individual species in years.
Fecundity (max ova): Reported max fecundity for each species as measured in number of ova.
Life History Classification: Assigned hard life history classifications.
Data was derived from the following sources:
Fish Traits Database: USGS, http://www.tandfonline.com/doi/abs/10.1577/1548-8446-34.10.487.
Altman, P. L., Dittmer, D. S. 1962. Growth, including reproduction and morphological development. Federation of American Societies for Experimental Biology, Washington.
Thomson, J. M., 1963. Synopsis of biological data on the grey mullet Mugil cephalus Linnaeus 1758. CSIRO Division of Fisheries and Oceanography, Australia.
Carlander, K. D. 1977. Handbook of Freshwater Fishery Biology. The Iowa State University Press, Ames.
Walsh, S. J., Burr, B. M. 1984. Life history of the banded pygmy sunfish, Elassoma zonatum Jordan (Pisces: Centrarchidae), in western Kentucky. Bull. Am. Mus. Nat. Hist. 8: 31-52.
Ben-Tuvia, A. 1986. In: Fishes of the North-eastern Atlantic and Mediterranean. Whitehead, P. J. P., Bauchot, M. L., Hureau, J. C., Nielsen, J., and Tortonese E. (eds.). UNESCO, Paris.
Page, L. M., Burr., B. M. 1991. A Field Guide to Freshwater Fishes of North America North of Mexico. Houghton Mifflin Company, Boston.
Jenkins, R. E., Burkhead, N. M. 1994. Freshwater Fishes of Virginia. American Fisheries Society, Bethesda.