TY - JOUR T1 - The paradox of constant oceanic plastic debris: evidence for evolved microbial biodegradation? JF - bioRxiv DO - 10.1101/135582 SP - 135582 AU - Ricard Solé AU - Ernest Fontich AU - Blai Vidiella AU - Salva Duran-Nebreda AU - Raúl Montañez AU - Jordi Piñero AU - Sergi Valverde Y1 - 2017/01/01 UR - http://biorxiv.org/content/early/2017/05/09/135582.abstract N2 - Although the presence of vast amounts of plastic in the open ocean has generated great concern due to its potential ecological consequences, recent studies reveal that its measured abundance is much smaller than expected. Regional and global studies indicate that the difference between expected and actual estimates is enormous, suggesting that a large part of the plastic has been degraded by either physical and biotic processes. A paradoxical observation is the lack of a trend in plastic accumulation found in the North Atlantic Subtropical Gyre, despite the rapid increase in plastic production and disposal. In this paper we show, using mathematical and computer models, that this observation could be explained by the nonlinear coupling between plastic (as a resource) and an evolved set of organisms (the consumers) capable of degrading it. The result is derived using two different resource-consumer mathematical approaches as well as a spatially-dependent plastic-microbial model incorporating a minimal hydrodynamical coupling with a two-dimensional fluid. The potential consequences of the evolution of marine plastic garbage and its removal are outlined. ER -