Navigation Links
Scientists map West coast areas most affected by humans
Date:5/11/2009

(Santa Barbara, Calif.) Climate change, fishing, and commercial shipping top the list of threats to the ocean off the West Coast of the United States.

"Every single spot of the ocean along the West Coast," said Ben Halpern, a marine ecologist at the National Center for Ecological Analysis and Synthesis (NCEAS) at the University of California, Santa Barbara, "is affected by 10 to 15 different human activities annually."

In a two-year study to document the way humans are affecting the oceans in this region, Halpern and colleagues overlaid data on the location and intensity of 25 human-derived sources of ecological stress, including climate change, commercial and recreational fishing, land-based sources of pollution, and ocean-based commercial activities.

With the information, they produced a composite map of the status of West Coast marine ecosystems.

The work was published online today in the journal Conservation Letters, and was conducted at NCEAS. NCEAS is primarily funded by NSF's Division of Environmental Biology.

"This important analysis of the geography and magnitude of land-based stressors should help focus attention on the hot-spots where coordinated management of land and ocean activities is needed," said Phillip Taylor, section head in NSF's Division of Ocean Sciences.

The lead scientists on the study conducted a similar analysis on a global scale; the results were published last year in Science. By refining the methods used in the global study and applying them at a regional scale, the scientists were able to test how well the results predicted regional ocean health.

"We found two remarkable and unexpected results in this research," said Halpern. "Ocean management needs to move beyond single-sector management and towards comprehensive ecosystem-based management if it is to be effective at protecting and sustaining ocean health.

"Also, the global results for this region were highly correlated with the regional results, suggesting that the global results can provide valuable guidance for regional efforts around the world."

The study results show that hotspots of cumulative impact are in coastal areas near urban centers and heavily polluted watersheds.

The research involved a four-step process.

First, the scientists gathered information to quantify and compare how different human activities affect each marine ecosystem. For example, fertilizer runoff was shown to have a large effect on salt marshes, but a much smaller one on rocky reefs.

Then the researchers gathered and processed data on marine ecosystems and human influences.

Next they combined data from the first and second steps to determine "human impact scores" for each location along the West Coast.

Finally, they compared regional results to global results for the same areas from the previous analysis.

"Comparing the global version of the map to regional-scale versions allows us to determine where it performs best," said biologist and paper co-author Kim Selkoe, also of NCEAS. "The high correlation is good news for marine managers in areas of the world that may be in need of maps of human impacts, but don't have the resources to undertake their own tailored analysis."

The study provides critical information for evaluating where certain activities can continue with little effect on the oceans, and where other activities might need to be stopped or moved to less sensitive areas, said Taylor.

As management and conservation of the oceans turns toward marine protected areas (MPAs), ecosystem-based management (EBM), and ocean zoning to manage human influence, such information will prove invaluable to managers and policymakers, said Halpern.

"The results are a wake-up call," he said. "We are significantly affecting the oceans."


'/>"/>

Contact: Gail Gallessich
gail.g@ia.ucsb.edu
805-893-7220
University of California - Santa Barbara
Source:Eurekalert  

Related biology news :

1. UK scientists working to help cut ID theft
2. Scientists show that mitochondrial DNA variants are linked to risk factors for type 2 diabetes
3. Comet probes reveal evidence of origin of life, scientists claim
4. Scientists link fragile X tremor/ataxia syndrome to binding protein in RNA
5. Male elephants get photo IDs from scientists
6. Scientists retrace evolution with first atomic structure of an ancient protein
7. Muscle mass: Scientists identify novel mode of transcriptional regulation during myogenesis
8. Carnegie Mellon scientists develop nanogels that enable controlled delivery of carbohydrate drugs
9. Clemson scientists shed light on molecules in living cells
10. Scientists tackle mystery mountain illness
11. T. rex quicker than Becks, say scientists
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Scientists map West coast areas most affected by humans
(Date:6/7/2016)... 2016  Syngrafii Inc. and San Antonio Credit ... includes integrating Syngrafii,s patented LongPen™ eSignature "Wet" solution ... will result in greater convenience for SACU members ... maintaining existing document workflow and compliance requirements. ... Highlights: ...
(Date:6/2/2016)... --  The Weather Company , an IBM Business (NYSE: ... in which consumers will be able to interact with IBM ... voice or text and receive relevant information about the product ... have long sought an advertising solution that can create a ... and valuable; and can scale across millions of interactions and ...
(Date:5/24/2016)... 24, 2016 Ampronix facilitates superior patient care by providing unparalleled technology to ... display is the latest premium product recently added to the range of products distributed ... ... ... Imaging- LCD Medical Display- Ampronix News ...
Breaking Biology News(10 mins):
(Date:12/4/2016)... SPRINGFIELD, Mass. and CAMBRIDGE, ... South Africa , Dec. 4, 2016 /PRNewswire/ ... and providing connected diagnostics software platforms for the ... on making "Anywhere. Care.™" a reality with its ... companies have entered into a development and license ...
(Date:12/2/2016)... 2016 CytRx Corporation (NASDAQ: CYTR ... oncology, today announced the appointment of Earl Warren ... and private healthcare investor, to its Board of Directors. ... clinical and strategic experience at the highest level," said ... "As one of the world,s leading orthopedic surgeons, Dr. ...
(Date:12/2/2016)... ... December 01, 2016 , ... ... Symposium (CSS) and the popularity of US Single Day Events (SDE) to organize ... early Summer 2018, in Raleigh, NC. Topics of the pharmaceutical and life sciences ...
(Date:12/2/2016)... ... ... Robots will storm the Prudential Center in Boston, MA during the ... held on the United Nations International Day of Persons with Disabilities, will highlight the ... Technologies is partnering with NTI to showcase how technology can help individuals with severe ...
Breaking Biology Technology: