Tagasi otsingusse
Martins et al., 2023

Widespread reductions in body size are paired with stable assemblage biomass

Martins, I. S., Schrodt, F., Blowes, S. A., Bates, A. E., Bjorkman, A. D., Brambilla, V., Carvajal-Quintero, J., Chow, C. F. Y., Daskalova, G. N., Edwards, K., Eisenhauer, N., Field, R., Fontrodona-Eslava, A., Henn, J. J., van Klink, R., Madin, J. S., Magurran, A. E., McWilliam, M., Moyes, F., Pugh, B., Sagouis, A., Trindade-Santos, I., McGill, B., Chase, J. M., Dornelas, M.
DOI
DOI10.1101/2023.02.03.526822
Aasta2023
KirjastusCold Spring Harbor Laboratory
Tüüppreprint (artikkel digiarhiivis)
Keelinglise
Id47956

Abstrakt

Biotic responses to global change include directional shifts in organismal traits. Body size, an integrative trait that determines demographic rates and ecosystem functions, is often thought to be shrinking in the Anthropocene. Here, we assess the prevalence of body size change in six taxon groups across 5,032 assemblage time-series spanning 1960-2020. Using the Price equation to partition this change into within-species body size versus compositional changes, we detect prevailing decreases in body size through time. Change in assemblage composition contributes more to body size changes than within-species trends, but both components show substantial variation in magnitude and direction. The biomass of assemblages remains remarkably stable as decreases in body size trade-off with increases in abundance. One-Sentence Summary Variable within-species and compositional trends combine into shrinking body size, abundance increases and stable biomass.

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