Navigation Links
Posidonia meadows reflect pollution levels in the Mediterranean

"Posidonia ocenica can act as an environmental tracer, reflecting different levels of local and regional pollution", Antonio Tovar-Snchez, lead author of the study and a researcher at the Global Change research department at the Mediterranean Institute for Advanced Studies (CSIC-UIB), tells SINC.

The analysis of metal levels in Posidonia oceanica, which has been published in the Journal of Geophysical Research-Biogeosciences, provided a temporary record of large scale historic environmental changes, such as atmospheric deposition events, which are increasingly frequent in the western Mediterranean as a result of global warming.

According to the researchers, the Posidonia beds are a "tool that can be used to study past environmental events, which is essential for environmental management strategies and for studying climate change", because metals (both nutritional and toxic ones) are stored in the fibres of the plants as they grow.

Tracing metals in Mallorcan waters

The scientists gathered samples from more than 50 beds of Posidonia throughout the Balearic archipelago. They carried out a chemical analysis of the plants' rhizomes (underground stalks) to identify the metals that had reached the Mediterranean over the past 30 years, traces of which are locked up in these marine plants.

The highest levels were of aluminium, cadmium, chrome, copper, lead and zinc, on the island of Mallorca. The study shows there was a fall in silver levels over this period (by more than 80% from 1990 to 2005 in Mallorca), attributed to a decline in anthropogenic sources.

Levels of nickel and zinc were the only elements that experienced an increase since 1996 over all seasons. "This is due to the atmospheric particle load in the air across the entire Mediterranean", say the scientists. Atmospheric events would also be responsible for this.

Posidonia ocenica is a very long-living plant, with its stalks living for several decades on the sea bed, forming meadows that have existed for thousands of years. It has rigid vascular structures and it covers an area totalling more than 50,000 km2 across the length and breadth of the Mediterranean. These characteristics make it a "good" indicator of environmental quality, both in terms of the past and the present.

Posidonia meadows play a crucial ecological and biological role in the Mediterranean. "They are home to a wealth of biological diversity, they provide food and refuge for numerous sea species, they produce oxygen, store CO2 and also protect the coast from erosion, acting as natural barriers", points out Tovar-Snchez. Posidonia meadows are legally protected by national and European legislation.


Contact: SINC
FECYT - Spanish Foundation for Science and Technology

Related biology news :

1. Consumer responses to Gulf oil spill reflect Americans changing corporate expectations
2. Fish facing reflections become feisty but fearful
3. Elsevier pilots new research tool Reflect in its premier life science journal Cell
4. Reflective film can boost profits for apple growers
5. Reflecting on the social implications of human genetics research -- past, present and future
6. Plant reflections may be key to early detection of treatment needs
7. Soil, conservation experts to reflect on Hurricane Katrina disaster
8. New link between pollution, temperature and sleep-disordered breathing
9. Pollution dispersion research aids understanding of 2002 break-up of Antarctic ozone hole
10. EPA holds seminar on air pollution and cardiovascular disease
11. Particulate air pollution affects heart health
Post Your Comments:
Related Image:
Posidonia meadows reflect pollution levels in the Mediterranean
(Date:11/12/2015)...  Arxspan has entered into an agreement with ... use of its ArxLab cloud-based suite of biological ... will support the institute,s efforts to electronically manage ... internally and with external collaborators. The ArxLab suite ... Institute,s electronic laboratory notebook, compound and assay registration, ...
(Date:11/10/2015)... YORK , Nov. 10, 2015 ... to behavioral biometrics that helps to identify and ... fraud. Signature is considered as the secure and ... the identification of a particular individual because each ... more accurate results especially when dynamic signature of ...
(Date:11/2/2015)... 2015  SRI International has been awarded a contract ... services to the National Cancer Institute (NCI) PREVENT Cancer ... expertise, modern testing and support facilities, and analytical instrumentation ... toxicology studies to evaluate potential cancer prevention drugs. ... Cancer Drug Development Program is an NCI-supported pipeline to ...
Breaking Biology News(10 mins):
(Date:11/25/2015)... , ... November 25, 2015 , ... ... uBiome, were featured on AngelList early in their initial angel funding process. Now, ... syndicate for individuals looking to make early stage investments in the microbiome space. ...
(Date:11/24/2015)... 2015 /CNW/ - iCo Therapeutics ("iCo" or "the Company") ... for the quarter ended September 30, 2015. Amounts, ... and presented under International Financial Reporting Standards ("IFRS"). ... said Andrew Rae , President & CEO ... not only value enriching for this clinical program, ...
(Date:11/24/2015)... -- --> --> ... Market by Product & Services (Primer, Probe, Custom Oligos, ... End-User (Research, Pharmaceutical & Biotech, Diagnostic Labs) - Global ... expected to reach USD 1,918.6 Million by 2020 from ... 10.1% during the forecast period. Browse 183 ...
(Date:11/24/2015)... Israel , Nov. 24, 2015  Tikcro Technologies Ltd. (OTCQB: TIKRF) ... on December 29, 2015 at 11:00 a.m. Israel ... Electra Tower, 98 Yigal Allon Street, 36 th Floor, ... of Eric Paneth and Izhak Tamir to the ... Rami Skaliter as external directors; , approval of an amendment to ...
Breaking Biology Technology: