Showing posts with label multiple. Show all posts
Showing posts with label multiple. Show all posts

Sunday, 30 October 2011

Florida Keys ecosystem threatened by multiple stressors

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ScienceDaily (Oct. 21, 2011) — NOAA scientists have found that pressure from increasing coastal populations, ship and boat groundings, marine debris, poaching, and climate change are critically threatening the health of the Florida Keys ecosystem. Many historically abundant marine resources such as green sea turtles and coral habitat continue to be at risk with low rates of recovery.

The findings were released October 20 in the Condition Report 2011 for Florida Keys National Marine Sanctuary, describing the status and trends of the sanctuary's water quality, habitats, and marine and cultural resources, and the human activities that affect them. This report is one of an ongoing series of condition reports for NOAA's 13 national marine sanctuaries and Papahanaumokuakea Marine National Monument. It will guide a comprehensive review of sanctuary regulations and management plan beginning in 2012 and provide an important baseline on the status of sanctuary marine resources.

The report documents improvements in local water quality and an increase in the size and abundance of some fish species and spiny lobster in large reserves within the sanctuary, but also notes that challenges remain such as, addressing regional influences to water quality, human impacts on marine resources, and the effects of climate change. It further suggests additional efforts are necessary to support sustained management efforts, and increase regulatory compliance and community engagement to address those challenges.

"This report provides us with a great benchmark that can be used to protect our sanctuary's valuable and productive marine ecosystem," said Sean Morton, superintendent, Florida Keys National Marine Sanctuary. "The report also helps identify gaps in current monitoring efforts and highlights areas where we need additional information. Our long-term monitoring shows management actions are contributing to some positive results, however recovery of ecosystem health takes time.""

Since its designation in 1990, Florida Keys National Marine Sanctuary has worked with a wide array of local, state, and federal partners to promote conservation and sustainable use of the Keys ecosystem for future generations. These objectives are addressed through public education and research programs, the implementation of regulations including the prohibition of pollution discharge in sanctuary waters, and the designation of highly protected no-take marine zones to protect 6,000 species of marine life and reduce user conflicts. These efforts have been critical tools for natural resource management in the Florida Keys where ocean recreation and tourism supports more than 33,000 jobs, and accounts for 58 percent of the local economy and $2.3 billion in annual sales.

The full report is available online at http://sanctuaries.noaa.gov/science/condition/fknms.

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Monday, 24 October 2011

More African-Americans burdened by osteoarthritis in multiple large joints

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ScienceDaily (Oct. 21, 2011) — New research suggests African Americans have a higher burden of multiple, large-joint osteoarthritis (OA), and may not be recognized based on the current definition of "generalized OA." African Americans were also more likely to have knee OA, but less likely to be affected by hand OA than Caucasians according to the findings recently reported in Arthritis & Rheumatism, a peer-reviewed journal of the American College of Rheumatology (ACR).

OA is the most common type of arthritis and typically affects multiple joints. The National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) estimates that more than 27 million adults, 25 years of age and older, are burdened by OA. With the percentage of those affected by OA increasing as the population ages, NIAMS projects that 67 million individuals will have doctor-diagnosed arthritis by 2030. While previous studies have investigated radiographic or symptomatic OA patterns using combinations of joint sites, research of multi-joint involvement has mainly been limited to Caucasian women.

For the current study, part of the Johnston County Osteoarthritis Project, Dr. Amanda Nelson from the University of North Carolina at Chapel Hill-UNC Rheumatology/Thurston Arthritis Research Center and colleagues, analyzed radiographic data for the hands, knee (tibofemoral [TFJ] and patellofemoral joints), hips and spine (lumbosacral) in African American and Caucasian men and women who were 45 years of age and older. The team identified 16 mutually exclusive hand OA phenotypes in 2083 participants and 32 whole-body phenotypes in 1419 individuals. Information on age, gender, race and body mass index (BMI) was also collected through questionnaires and clinical examination.

After adjusting for age, gender and BMI, analysis showed that African Americans had significantly less frequent OA in finger tip joints (distal interphalangeal), alone and with other hand joint sites compared to Caucasians. African Americans compared with Caucasians were twice as likely to have knee (TFJ) OA and had 77% greater odds of knee and spine OA together. Frequencies of OA in hand joint sites other than distal interphalangeal joints were comparable between both races.

Study participants had a mean age of more than 65 years, with a mean BMI categorizing them as obese. One third of participants were male and two thirds were Caucasian. Overall 42% of the study subjects had knee OA, 36% had hip OA and 32% OA of the hand. Spine OA was most common, occurring in 62% of participants. "Racial differences in OA phenotypes were more significant than gender disparity," concluded Dr. Nelson. "Our findings suggest a substantial health burden of large-joint OA, particularly hip and spine, among African Americans and further studies that address this concern are warranted."

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Journal Reference:

Amanda E. Nelson, Jordan B. Renner, Todd A. Schwartz, Virginia B. Kraus, Charles G. Helmick, Joanne M. Jordan. Differences in multi-joint radiographic osteoarthritis phenotypes among African Americans and Caucasians: The Johnston County Osteoarthritis Project. Arthritis & Rheumatism, 2011; DOI: 10.1002/art.30610

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