Ecosystem Energetics

Brafield, A. E.; Llewellyn, Michael J.

doi:10.1007/978-1-4684-0649-8_9

Cited by 1 publication

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“…Here, we observed differences in both the magnitude of change in total energy and shifts in EPT time series in relative developmental time following exposure to chronic elevated temperatures. Allocation of energetic reserves to various behavioural and physiological functions is hypothesised to be a careful trade-off based on the environmental conditions under which an organism finds itself ( Brafield and Llewellyn, 1982 ). If EPTs are directly related to biochemical energy turnover in developing embryos, visual quantification of levels of biochemical energy turnover within different temporal frequencies could provide useful proxies for how energy is allocated into various processes throughout the whole period of development, rather than characterising energetic turnover at discrete points ( Attard and Hudon, 1987 ; Stackley et al, 2011 ).…”

Section: Discussionmentioning

confidence: 99%

A phenomics approach reveals interspecific differences in integrated developmental responses to chronic elevated temperatures

McCoy

Spicer

Rundle

et al. 2023

Journal of Experimental Biology

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Phenomics, high-dimensional organismal phenotyping, is advanced as a solution to quantifying complex developmental responses to elevated temperatures . ‘Energy proxy traits’ (EPTs) measure the phenotype as a spectrum of energy values across different temporal frequencies from pixel value fluctuations of video. Whilst they have proven effective in measuring the biology of complex and dynamic developing organisms, their utility in assessing environmental sensitivity of different species is untested. Using EPTs, we assess the relative thermal sensitivities of embryos of three species of freshwater snail with marked differences in their developmental event timings . Embryos of Lymnaea stagnalis, Radix balthica and Physella acuta were videoed hourly for the duration of their embryonic development at two temperatures: 20˚C and 25˚C. The video was used to calculate EPTs for the duration of their embryonic development, and during discrete physiological windows in development. Changes in energy spectra during development identified marked differences in thermal sensitivities between species, and suggest a relatively heightened sensitivity of gross rates of embryonic physiology and behaviour in embryos of R. balthica, developmental window specific thermal responses that reflect ontogenetic differences in observable physiologies, and temperature induced changes in physiological event timing. EPTs enabled comparison of high-dimensional spectral phenotypes, providing a unique capability for assessing sensitivity continuously in developing individuals. Such integrative and scalable phenotyping is prerequisite for improved understanding of the sensitivity of early life stages of different species.

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Section: Discussionmentioning

confidence: 99%