Navigation Links
New study provides global analysis of seagrass extinction risk

A team of 21 researchers from 11 nations, including professor Robert "JJ" Orth of the Virginia Institute of Marine Science, has completed the first-ever study of the risk of extinction for individual seagrass species around the world.

The 4-year study, requested by the International Union for the Conservation of Nature (IUCN), shows that 10 of the 72 known seagrass species (14%) are at an elevated risk of extinction, while 3 species qualify as endangered.

The authors caution that loss of seagrass species and seagrass biodiversity will seriously impact marine ecosystems and the human populations that depend on the resources and ecosystem services that seagrasses provide. A 1997 study placed the value of those services at US$34,000 per hectare per year. Seagrasses offer critical habitat for aquatic life, clear the water by reducing wave action, absorb excess nutrients, and reduce shoreline erosion.

The study, in the online issue of Biological Conservation, determines the likelihood of extinction for each of the world's 72 species of seagrass using the categories and criteria of the IUCN's Red List of Threatened Species.

The IUCN Red List is the most widely accepted method for assessing a species' probability of extinction and its conservation status on a global scale. Red List categories run from "least concern" to "near threatened," "vulnerable," "endangered," "critically endangered," "extinct in the wild," and "extinct."

Placement in a category reflects a species' abundance, reproductive rate, geographic range, and other such factors. A "data deficient" category holds species for which there is inadequate information to assess extinction risk based on distribution, population status, or both. The researchers placed 9 seagrass species (12.5%) in that category.

The researchers listed 48 species (67%) in the "Least Concern" category, including eelgrass (Zostera marina), the most common seagrass in lower Chesapeake Bay. Orth notes, however, that most of these speciesincluding eelgrassare declining in their area of coverage. (Data from VIMS' annual aerial survey shows that eelgrass is absent from one-half of its former range and continues to decline in the areas where it remains).

Orth says that eelgrass was listed as a species of least concerndespite severe declines in Chesapeake Bay, San Francisco Bay, and other parts of its rangebecause it is still widespread elsewhere and thrives in less developed and clear-water areas. He cites his team's successful efforts to replant eelgrass in the seaside bays of Virginia's Eastern Shore as evidence of the species' ability to rebound quickly given clear and cool water.

VIMS scientists have been restoring eelgrass to Virginia's seaside bays since 1997. Their efforts have resulted in the largest and most successful seagrass restoration project in the world, with 38 million eelgrass seeds broadcast onto 309 acres during the last decade. As of 2010, these restored sites have spread naturally to more than 4,200 acres.


Contact: David Malmquist
Virginia Institute of Marine Science

Related biology news :

1. Baylor study finds common fire retardant harmful to aquatic life
2. Happy guys finish last, says new study on sexual attractiveness
3. Genetic study clarifies evolutionary origin of elusive montane red fox
4. A study will enable the survival and growth of the 3 development phases of the European eel
5. 5 UH graduates receive NSF fellowships for further study
6. Study Shows Sutro Biopharmas Biochemical Protein Synthesis Technology Enables Rapid Production and Scale-Up of Biopharmaceuticals
7. New study predicts risk of wetland habitat loss in southern United States
8. Greenhouse ocean study offers warning for future
9. Rigorous study confirms video game playing increases food intake in teens
10. Study reveals need for personalized approach in treatment of AML
11. Study finds therapies using induced pluripotent stem cells could encounter immune rejection problems
Post Your Comments:
Related Image:
New study provides global analysis of seagrass extinction risk 
(Date:11/12/2015)... 11, 2015   Growing need for low-cost, ... has been paving the way for use of ... discrete analytes in clinical, agricultural, environmental, food and ... used in medical applications, however, their adoption is ... to continuous emphasis on improving product quality and ...
(Date:11/10/2015)... Nov. 10, 2015 About ... that helps to identify and verify the identity ... considered as the secure and accurate method of ... a particular individual because each individual,s signature is ... especially when dynamic signature of an individual is ...
(Date:11/4/2015)... ALBANY, New York , November 4, 2015 /PRNewswire/ ... According to a new market report published by Transparency ... Size, Share, Growth, Trends and Forecast 2015 - 2022", ... value of US$ 30.3 bn by 2022. The market ... during the forecast period from 2015 to 2022. Rising ...
Breaking Biology News(10 mins):
(Date:11/25/2015)... November 25, 2015 Studies reveal ... human plaque and pave the way for more effective treatment ... cats     --> ... diagnosed health problems in cats, yet relatively little was understood ... collaborative studies have been conducted by researchers from the WALTHAM ...
(Date:11/25/2015)... 25, 2015 Orexigen® Therapeutics, Inc. (Nasdaq: ... a fireside chat discussion at the Piper Jaffray 27th ... . The discussion is scheduled for Wednesday, December 2, ... .  A replay will be available for 14 days ... , Julie NormartVP, Corporate Communications and Business Development , ...
(Date:11/24/2015)... 2015 Cepheid (NASDAQ: CPHD ) today ... following conference, and invited investors to participate via webcast. ...      Tuesday, December 1, 2015 at 11.00 a.m. Eastern Time ...      Tuesday, December 1, 2015 at 11.00 a.m. Eastern Time ... New York, NY      Tuesday, December 1, 2015 ...
(Date:11/24/2015)... 24, 2015 /PRNewswire/ - Aeterna Zentaris Inc. (NASDAQ:  AEZS) (TSX: ... behalf of the Toronto Stock Exchange, confirms that as ... no corporate developments that would cause the recent movements ... --> About Aeterna Zentaris Inc. ... --> Aeterna Zentaris is a specialty biopharmaceutical company ...
Breaking Biology Technology: