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Researchers Use Technology and Nature to Save Hawaii’s Coral Reefs From Invasive Algae
Researchers at the University of Hawaii at Manoa and the state of Hawaii's Division of Aquatic Resources (DAR) have developed an innovative method of removing invasive macroalgae that can smother coral reefs, the University of Hawaii reported Aug. 9.
A combination of removing macroalgae with an underwater "Super Sucker" vacuum and introducing juvenile sea urchins to feed on the remaining algae reduced the amount of algae on a reef off of Oahu, Hawaii by 85 percent, the researchers found.
"This management approach is the first of its kind at the reef-scale," study author and University of Hawaii Hawaii Institute of Marine Biology (HIMB) doctoral candidate Chris Wall said in the university press release. "Our research shows promise as an effective means to reduce invasive macroalgae with minimal environmental impact, while also incorporating a native herbivore to regulate a noxious invasive species."
The combined approach removed more than 40,000 pounds of invasive algae, "outplanted" 99,000 native collector sea urchins and freed almost six acres of reef over a two year period, according to The University of Hawaii.
"The surprise was just how effective this approach was at reducing invasive macroalgae over the two-year period," Wall said.
Few large-scale attempts to remove the algae, which limits biodiversity on the reef by smothering coral, monopolizing the ecosystem and competing with native species, had proven successful in the past, according to the abstract of the study published Aug. 8 in the journal PeerJ.
The Super Sucker consists of a long hose attached to a pump system housed on a nearby barge. Divers feed the algae into the hose, which sucks it up to the barge where it can be sorted, bagged and delivered to farmers.
A diver uses the Super Sucker to remove algae in Kaneohe Bay, Hawaii. MeganCookDAR
Macroalgae is rich in nutrients and is used on plants like taro and sweet potato. It is also high in potassium and thought to be an effective insect repellent.
The successful removal of the reef-smothering algae means Hawaii's coral reefs have one less thing to worry about, given the risk posed to coral worldwide due to climate change related problems like ocean acidification and coral bleaching.
"Coral reefs are an important part of the economy, culture, sustenance and recreation of Hawaii," study author and DAR acting administrator Brian J. Neilson told the University of Hawaii. "Local action is instrumental in supporting the resilience of coral reefs. This study provides an important tool that can assist in the management and conservation of coral reefs."
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‘Companies Should Not Be Allowed to Use Hazardous Ingredients in Products People Use’: Michelle Pfeiffer Speaks Up for Safer Cosmetics
The beauty products we put on our skin can have important consequences for our health. Just this March, the U.S. Food and Drug Administration (FDA) warned that some Claire's cosmetics had tested positive for asbestos. But the FDA could only issue a warning, not a recall, because current law does not empower the agency to do so.
Michelle Pfeiffer wants to change that.
The actress and Environmental Working Group (EWG) board member was spotted on Capitol Hill Thursday lobbying lawmakers on behalf of a bill that would increase oversight of the cosmetics industry, The Washington Post reported.
By Julia Conley
Scientists at the United Nations' intergovernmental body focusing on biodiversity sounded alarms earlier this month with its report on the looming potential extinction of one million species — but few heard their calls, according to a German newspaper report.
The climate crisis is a major concern for American voters with nearly 40 percent reporting the issue will help determine how they cast their ballots in the upcoming 2020 presidential election, according to a report compiled by the Yale Program on Climate Change Communication.
Of more than 1,000 registered voters surveyed on global warming, climate and energy policies, as well as personal and collective action, 38 percent said that a candidate's position on climate change is "very important" when it comes to determining who will win their vote. Overall, democratic candidates are under more pressure to provide green solutions as part of their campaign promises with 64 percent of Democrat voters saying they prioritize the issue compared with just 34 percent of Independents and 12 percent of Republicans.
President Donald Trump has agreed to sign a $19.1 billion disaster relief bill that will help Americans still recovering from the flooding, hurricanes and wildfires that have devastated parts of the country in the past two years. Senate Republicans said they struck a deal with the president to approve the measure, despite the fact that it did not include the funding he wanted for the U.S.-Mexican border, CNN reported.
"The U.S. Senate has just approved a 19 Billion Dollar Disaster Relief Bill, with my total approval. Great!" the president tweeted Thursday.
"There was a lot of devastation throughout the state," Governor Mike Parson said at a Thursday morning press conference, as NPR reported. "We were very fortunate last night that we didn't have more injuries than what we had, and we didn't have more fatalities across the state. But three is too many."