Malaspina2010: End of the largest project on global change
The Malaspina Expedition confirms that pollution reaches even the most remote
Barcelona, September 16th 2014. Three years after the Hesperides vessel returned to Spain culminating the around the world of the Malaspina Expedition, researchers have an increasingly clear picture of how the global ocean works and what is its health condition. Specifically, the input of pollutants from the atmosphere is not limited to coastal areas, but also occurs in the most remote areas of the planet, and it is already affecting the ocean ecosystem.
This and other findings are presented this week in CSIC Residence for Researchers in
The expedition has generated, for the first time, a database that compiles the levels of organic pollutants in all the oceans. Researchers have managed to determine how the dioxins, chemical compounds generated during combustion of organic waste, are globally distributed.
Jordi Dachs, CSIC researcher at the Institute of Environmental Assessment and Water Research and one of the authors of the work that also confirms that these pollutants have begun to affect phytoplankton and zooplankton, states: “Concentrations are larger near the continents than in the central areas of the ocean, a circumstance that is explained by the degradation processes during transport as they are directly deposited into the ocean from the atmosphere.
CSIC researcher and Malaspina coordinator, Carlos Duarte, states: “We noticed that pollutants enter directly into the ocean through the atmosphere, reaching the most remote areas of the planet, with contributions that are already affecting the ocean ecosystem”.
In addition, during the project, the largest database of polycyclic aromatic hydrocarbons (PAHs) in the ocean has been generated. PAHs are found as part of the fossil fuels and tthey are also generated during the combustion of oil and coal. Dachs asserts: "We have found that the concentrations of PAHs are higher near the continents than in the central areas of the ocean, and that a diffuse input of PAHs from atmospheric deposition occurs. This input is greater than the arrival of oil spills in the ocean and occurs in all oceans, but its impact is still unknown”.
Researchers have already shown, from samples collected on board, that there are five large accumulations of plastic waste in the open ocean, coinciding with the five major circulation turns of oceanic surface water. According to these results, the problem of plastic waste pollution has a global character. Duarte emphatizes: "Only a global expedition as Malaspina could obtain these results and evaluate the overall abundance of plastic pollution".
Duarte states: “The Malaspina Expedition has meant a leap forward in understanding the ecosystem of the global ocean, particularly in the waters below the exposure to sunlight, where we discovered a fish biomass up to 10 times higher than previously thought”.
Researchers have already begun to sequence the genome of the global deep ocean, using more than 2,000 samples of microorganisms collected in the Atlantic, Indian and Pacific Ocean during the expedition. This collection of marine microbial genomics, the world's first at a global scale, will provide new keys to a reservoir of unexplored
The sequencing works, framed in the Malaspinomics project, focus on the viruses, bacteria and protists that inhabit the ocean to 4,000 feet deep. Preliminary results of Malaspinomics reveal a wealth of previously unknown species of microorganisms in the deep ocean. Specifically, 60% of the bacterial species detected by deep-ocean massive sequencing techniques are unknown.
The project coordinator adds: “The Spanish oceanography had never led a project with such an international dimension, with more than 18 countries involved. In addition to marking a before and after for scientific advances, has managed to break traditional boundaries and suspicion between scientific groups. It has also been able to approach the Spanish oceanographic to society”.
The Hesperides, a vessel of the Spanish Armada, departed on December 15th 2010 in Cadiz, with stops in Rio de Janeiro (Brazil) and Cape Town (South Africa). After Perth (Australia), it passed through Sydney (Australia), Auckland (New Zealand), Honolulu (Hawaii), and Cartagena de Indias (Colombia). Another vessel, the Sarmiento de Gamboa, belonging to the CSIC, returned in April 2010 from Santo Domingo (Dominican Republic), where it arrived after exploring the Atlantic for nearly two months.
The Malaspina Expedition is a Consolider-Ingenio 2010 project managed by CSIC and
- Laura Morales, Jordi Dachs, Belén González-Gaya, Gema Hernán, Manuela Ábalos, y Esteban Abad. Background Concentrations of Polychlorinated Dibenzo?p?Dioxins, Dibenzofurans, and Biphenyls in the Global Oceanic Atmosphere. Environmental Science & Technology. DOI: 10.1021/es5023619.
- Belén González-Gaya, Javier Zúñiga-Rival, María-José Ojeda, Begoña Jiménez, y Jordi Dachs. Field Measurements of the Atmospheric Dry Deposition Fluxes and Velocities of Polycyclic Aromatic Hydrocarbons to the Global Oceans. Environmental Sciencie & Technology. DOI:
- Andrés Cózar, Fidel Echevarría, Juan I. González-Gordillo, Xabier Irigoien, Bárbara Úbeda, Santiago Hernández-León, Álvaro Palma, Sandra Navarro, Juan García-de-Lomas, Andrea Ruiz, María L. Fernández-de-Puelles, and Carlos M. Duarte. Plastic debris in the open ocean. PNAS. DOI: 10.1073/pnas.1314705111.
Source: CSIC Dpto. Comunicación