The marine plastic litter pollution is a worldwide growing environmental concern. Despite its negative effects on marine ecosystems, the phenomenon is still not well-known at global and local scale. This work aims at assessing the spatio-temporal distribution of plastic litter amounts found at the sea-floor in a region of the central Mediterranean (Ionian sea). Inspired by species distribution models, we propose a two-parts model to accommodate the excess of zeros and the spatio-temporal correlation characterizing abundance monitoring data. A common spatial effect that links the plastic abundances and the probabilities of occurrences is implemented with the Stochastic Partial Differential Equation approach extended to a non-stationary barrier model. The INIA methodology allows to efficiently perform Bayesian inference to fit complex spatio-temporal models including effects of environmental covariates and enables to investigate the assemblages of plastic litter over the study region.
|Titolo:||An inla spatio-temporal model for zero-inflated marine plastic litter abundance|
CALCULLI, CRESCENZA (Corresponding)
|Data di pubblicazione:||2019|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|