Author:
Grimaudo Roberto,Lazzari Paolo,Solidoro Cosimo,Valenti Davide
Abstract
AbstractThe analysis of experimental data of the solar irradiance, collected on the marine surface, clearly highlights the intrinsic stochasticity of such an environmental parameter. Given this result, effects of randomly fluctuating irradiance on the population dynamics of a marine ecosystem are studied on the basis of the stochastic 0-dimensional biogeochemical flux model. The noisy fluctuations of the irradiance are formally described as a multiplicative Ornstein-Uhlenbeck process, that is a self-correlated Gaussian noise. Nonmonotonic behaviours of the variance of the marine populations’ biomass are found with respect to the intensity and the autocorrelation time of the noise source, manifesting a noise-induced transition of the ecosystem to an out-of-equilibrium steady state. Moreover, evidence of noise-induced effects on the organic carbon cycling processes underlying the food web dynamics are highlighted. The reported results clearly show the profound impact the stochastic environmental variables can have on both the populations and the biogeochemistry at the basis of a marine trophic network.
Funder
Ministero dell’Istruzione, dell’Università e della Ricerca
Publisher
Springer Science and Business Media LLC
Reference69 articles.
1. Sarmiento, J. L. & Gruber, N. Ocean biogeochemical dynamics (Princeton University Press, 2006).
2. Doney, S. C. et al. Climate change impacts on marine ecosystems. Ann. Rev. Mar. Sci. 4, 11–37. https://doi.org/10.1146/annurev-marine-041911-111611 (2012).
3. Barange, M. et al. Impacts of climate change on marine ecosystem production in societies dependent on fisheries. Nat. Clim. Chang. 4, 211–216. https://doi.org/10.1038/nclimate2119 (2014).
4. von Schuckmann, K. & et. al. Copernicus marine service ocean state report, issue 4. J. Oper. Oceanogr.13, S1–S172, https://doi.org/10.1080/1755876X.2020.1785097 (2020).
5. Vichi, Marcello et al. The biogeochemical flux model (BFM): Equation description and user manual, BFM version 5.1. Tech. Rep., CMCC, Bologna, Italy (2015).
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献