News

The influence of plastic pollution and ocean change on detrital decomposition

Abstract.

"Plastic pollution and ocean change have mostly been assessed separately, missing potential interactions that either enhance or reduce future impacts on ecosystem processes. Here, we used manipulative experiments with outdoor mesocosms to test hypotheses about the interactive effects of plastic pollution, ocean warming and acidification on macrophyte detrital decomposition. These experiments focused on detritus from kelp, Ecklonia radiata, and eelgrass, Zostera muelleri, and included crossed treatments of (i) no, low and high plastic pollution, (ii) current/future ocean temperatures, and (iii) ambient/future ocean partial pressure of carbon dioxide (pCO2). High levels of plastic pollution significantly reduced[...]"

 

Source: Science Direct
Authors: Sebastian G. Litchfield et al.
DOI: https://doi.org/10.1016/j.marpolbul.2020.111354

Read the full article here.


Can microplastics pose a threat to ocean carbon sequestration?

Abstract.

"Global climate change has attracted worldwide attention. The ocean is the largest active carbon pool on the planet and plays an important role in global climate change. However, marine plastic pollution is getting increasingly serious due to the large consumption and mismanagement of global plastics. The impact of marine plastics on ecosystem responsible for the gas exchange and circulation of marine CO2 may cause more greenhouse gas emissions. Consequently, in this paper, threats of marine microplastics to ocean carbon sequestration are discussed. Marine microplastics[...]"

 

Source: Science Direct
Authors: Maocai Shen et al.
DOI: https://doi.org/10.1016/j.marpolbul.2019.110712

Read the full article here.


Sea urchin chronicles. The effect of oxygen super-saturation and marine polluted sediments from Bagnoli-Goroglio Bay on different life stages of the

sea urchin Paracentrotus lividus

Abstract.

"In marinas and harbours, the accumulation of pollutants in sediments, combined with poor exchange of water with the open sea, poses a major environmental threat. The presence of photosynthetic organisms and the related oxygen production, however, may alleviate the negative effects of environmental contamination on heterotrophic organisms, enhancing their physiological defences. Furthermore, possible transgenerational buffer effects may increase the ability of natural populations to face environmental[...]"

 

Source: Science Direct
Authors: Antonia Chiarore et al.
DOI: https://doi.org/10.1016/j.marenvres.2020.104967

Read the full article here.


Greenhouse gas cycling by the plastisphere: The sleeper issue of plastic pollution

Abstract.

"Plastic is an allochthonous material to marine ecosystems but is rapidly colonized by marine microbial communities, with an as yet unclear contribution to biogeochemical cycles. In this study, we investigated the influence of an active microbial community grown on microplastic particles (the plastisphere) on CO2 and N2O recycling and its potential role in greenhouse gas inventories and air-sea exchange. Microplastics were collected during two cruises (Cimar 21 and FIP Montes Submarinos) from the surface layer (5 m depth) from several contrasting trophic regions of the South Pacific Ocean, i.e., from a transition zone off the eutrophic coastal upwelling of Chile, to a mesotrophic transition area of oceanic seamounts and, finally, to an oligotrophic zone in the South Pacific Subtropical Gyre. [...]"

Source: Chemosphere
Authors: MarcelaCornejo-D’Ottone et al.
DOI: 10.1016/j.chemosphere.2019.125709

Read the full article here.