Environmental Metal Pollution Considered as Noise: Effects on the Spatial Distribution of Benthic Foraminifera in two coastal Marine Areas of Sicily (Southern Italy)
By Davide Valenti, L. Tranchina, M. Brai, A. Caruso, C. Cosentino, Bernardo Spagnolo. 2008
91 citations recorded by the source corpus.
Abstract We analyze the spatial distributions of two groups of benthic foraminifera ( A d e l o s i n a spp. + Q u i n q u e l o c u l i n a spp. and E l p h i d i u m spp. ), along Sicilian coast, and their correlation with six different heavy metals, responsible for the pollution. Samples were collected inside the Gulf of Palermo, which has a high level of pollution due to heavy metals, and along the coast of Lampedusa island (Sicily Channel, Southern Mediterranean), which is characterized by unpolluted sea waters. Because of the environmental pollution we find: (i) an anticorrelated spatial behaviour between the two groups of benthic foraminifera analyzed; (ii) an anticorrelated (correlated) spatial behaviour between the first (second) group of benthic foraminifera with metal concentrations; (iii) an almost uncorrelated spatial behaviour between low concentrations of metals and the first group of foraminifera in clean sea water sites. We introduce a two-species model based on the generalized Lotka–Volterra equations in the presence of a multiplicative noise, which models the interaction between species and environmental pollution due to the presence in top-soft sediments of heavy metals. The interaction coefficients between the two species are kept constant with values in the coexistence regime. Using proper values for the initial conditions and the model parameters, we find for the two species a theoretical spatial distribution behaviour in a good agreement with the data obtained from the 63 sites analyzed in our study.
Subfields: Artificial Intelligence, Global and Planetary Change, Pollution
View Paper: https://www.semanticscholar.org/paper/0022cdb1be76a136961db0f12f631c8bb51e40c1
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Citations in the corpus
- Spatio-temporal behaviour of the deep chlorophyll maximum in Mediterranean Sea: Development of a stochastic model for picophytoplankton dynamics (2012, background): “…by two factors: (i) non-linear interactions among their parts and (ii) external perturbations, both deterministic and random, coming from the environment (Spagnolo et al., 2004; Huppert et al., 2005; Ebeling and Spagnolo, 2005; Provata et al., 2008; Spagnolo and Dubkov, 2008; Valenti et al., 2008).”