Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Extensive seagrass meadows discovered in Indian Ocean through satellite tracking of green turtles

12.04.2018

Research led by Swansea University's Bioscience department has discovered for the first time extensive deep-water seagrass meadows in the middle of the vast Indian Ocean through satellite tracking the movement of green sea turtles.

A new study by Swansea University and Deakin University academics, published in the recent Marine Pollution Bulletin, reported how the monitoring of the turtles -- which forage on seagrasses - tracked the species to the Great Chagos Bank, the world's largest contiguous atoll structure in the Western Indian Ocean.


This is a green turtle with seagrass in the Caribbean.

Credit: Swansea University

This area lies in the heart of one of the world's largest Marine Protected Areas (MPAs) and the study involved the use of in-situ SCUBA and baited video surveys to investigate the day-time sites occupied by the turtles, resulting in the discovery of extensive monospecific seagrass meadows of Thalassondendron ciliatum.

These habitats are critically important for storing huge amounts of carbon in their sediments and for supporting fish populations.

At three sites that extended over 128?km of the Great Chagos Bank, there was a high seagrass cover (average of 74%) at depths to 29 metres.

The mean species richness of fish in the seagrass meadows was 11 species per site, with a mean average of 8-14 species across the aforementioned three sites.

Results showed a high fish abundance as well as a large predatory shark recorded at all sites and given that the Great Chagos Bank extends over approximately 12,500?km and many other large deep submerged banks exist across the world's oceans, the results suggest that deep-water seagrass may be far more abundant than previously suspected.

Reports of seagrass meadows at these depths with high fish diversity, dominated by large top predators, are relatively limited.

Dr Nicole Esteban, a Research Fellow at Swansea University's Biosciences department, said: "Our study demonstrates how tracking marine megafauna can play a useful role to help identify previously unknown seagrass habitat.

"We hope to identify further areas of critical seagrass habitat in the Indian Ocean with forthcoming turtle satellite tracking research."

Dr Richard Unsworth, from Swansea University's Biosciences department, said: "Seagrasses struggle to live in deep waters due to their need for high light, but in these crystal clear waters of Chagos these habitats are booming.

"Given how these habitats are threatened around the world it's great to come across a pristine example of what seagrass meadows should look like."

###

This research was led by the Bioscience department at Swansea University, alongside the involvement of researchers at Deakin University.

Ben Donovan | EurekAlert!

More articles from Life Sciences:

nachricht Enduring cold temperatures alters fat cell epigenetics
19.04.2018 | University of Tokyo

nachricht Full of hot air and proud of it
18.04.2018 | University of Pittsburgh

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Gamma-ray flashes from plasma filaments

Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.

The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...

Im Focus: Basel researchers succeed in cultivating cartilage from stem cells

Stable joint cartilage can be produced from adult stem cells originating from bone marrow. This is made possible by inducing specific molecular processes occurring during embryonic cartilage formation, as researchers from the University and University Hospital of Basel report in the scientific journal PNAS.

Certain mesenchymal stem/stromal cells from the bone marrow of adults are considered extremely promising for skeletal tissue regeneration. These adult stem...

Im Focus: Like a wedge in a hinge

Researchers lay groundwork to tailor drugs for new targets in cancer therapy

In the fight against cancer, scientists are developing new drugs to hit tumor cells at so far unused weak points. Such a “sore spot” is the protein complex...

Im Focus: The Future of Ultrafast Solid-State Physics

In an article that appears in the journal “Review of Modern Physics”, researchers at the Laboratory for Attosecond Physics (LAP) assess the current state of the field of ultrafast physics and consider its implications for future technologies.

Physicists can now control light in both time and space with hitherto unimagined precision. This is particularly true for the ability to generate ultrashort...

Im Focus: Stronger evidence for a weaker Atlantic overturning

The Atlantic overturning – one of Earth’s most important heat transport systems, pumping warm water northwards and cold water southwards – is weaker today than any time before in more than 1000 years. Sea surface temperature data analysis provides new evidence that this major ocean circulation has slowed down by roughly 15 percent since the middle of the 20th century, according to a study published in the highly renowned journal Nature by an international team of scientists. Human-made climate change is a prime suspect for these worrying observations.

“We detected a specific pattern of ocean cooling south of Greenland and unusual warming off the US coast – which is highly characteristic for a slowdown of the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

IWOLIA: A conference bringing together German Industrie 4.0 and French Industrie du Futur

09.04.2018 | Event News

 
Latest News

Improved stability of plastic light-emitting diodes

19.04.2018 | Power and Electrical Engineering

Enduring cold temperatures alters fat cell epigenetics

19.04.2018 | Life Sciences

New capabilities at NSLS-II set to advance materials science

18.04.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>