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New Agreement Offers Brighter Future for Pacific Bluefin Tuna
By Amanda Nickson
The Pacific bluefin tuna is among the most depleted species on the planet, having been fished down more than 97 percent from its historic, unfished size. For years, this prized fish has been in dire need of strong policies that would reverse that decline, but the two organizations responsible for its management—the Western and Central Pacific Fisheries Commission (WCPFC) and the Inter-American Tropical Tuna Commission (IATTC)—failed in their recent efforts, allowing overfishing to continue and further risking the future of the species.
Last week, however, at a joint meeting of the WCPFC Northern Committee and IATTC, Pacific bluefin received a much-needed respite when its primary fishing nations—Japan, South Korea, Taiwan, Mexico and the U.S.—reached agreement with other member states on a long-term plan that would rebuild the population from its current status of 2.6 percent of pre-fishing levels to 20 percent by 2034. This agreement, if properly implemented, would start the species—and the fishing industry that depends on it—on a path toward sustainability.
After decades of inaction, why did these two fisheries management bodies agree to take the needed steps toward rebuilding? Because ignoring the problem became impossible for managers. In the past two years, three nations exceeded their catch limits. Amid increasing calls from The Pew Charitable Trusts and others for a complete fishing moratorium, and in a worst-case scenario, an international trade ban, the government representatives to the WCPFC committee and IATTC finally stepped up to make a change.
Perhaps most significant was the course reversal by Japan. By far the largest fishing nation for, and consumer of, Pacific bluefin, Japan had long resisted proposed rebuilding plans. This year, though, thanks in part to strong international pressure and growing media attention within the country on the plight of the species, the Japanese delegates dropped that opposition and helped make progress that just a few years ago seemed far out of reach.
Despite this commitment, the work to help Pacific bluefin recover has only begun. In the fishing season that ended on June 30, Japanese fishermen exceeded their catch limits by 334 metric tons, and with many reports of illegal fishing in Japan's waters, the real amount could be higher. The U.S., South Korea and Mexico also exceeded limits over the past two years. Rebuilding the species under the new quotas and timeline will be nearly impossible if such overages continue. All countries that fish for Pacific bluefin must pledge to strengthen their domestic controls and monitoring programs to guarantee that the commitments to rebuilding made this year are not squandered in the future.
The decision on Pacific bluefin made at the joint meeting could signal a move toward a greater focus on conservation at regional fisheries management organizations like the WCPFC and IATTC. This action by major fishing nations indicates that concrete action is possible. Fishermen and fleets now hold the key to a sustained recovery, and all countries must work together to uphold the new rules. If they can do that, real change on the water may come sooner than many of us expected.
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Farms with just one or a handful of different crops encourage fewer species of pollinating and pest-controlling insects to linger, ultimately winnowing away crop yields, according to a new study.
Up to half of the detrimental impacts of the "landscape simplification" that monocropping entails come as a result of a diminished mix of ecosystem service-providing insects, a team of scientists reported Oct. 16 in the journal Science Advances.
Monocrop palm oil plantation Honduras.
SHARE Foundation / Flickr / CC BY-NC 2.0
"Our study shows that biodiversity is essential to ensure the provision of ecosystem services and to maintain a high and stable agricultural production," Matteo Dainese, the study's lead author and a biologist at Eurac Research in Bolzano, Italy, said in a statement.
It stands to reason that, with declines in the sheer numbers of insects that ferry pollen from plant to plant and keep crop-eating pests under control, these services will wane as well. But until now, it hasn't been clear how monocultures affect the number and mix of these species or how crop yields might change as a result.
Aiming to solve these questions, Dainese and his colleagues pulled together data from 89 studies cutting across a variety of landscapes, from the tropics of Asia and Africa to the higher latitudes of northern Europe. They tabulated the number of pollinating and pest-controlling insects at these sites — both the absolute number of individuals and the number of species — along with an assessment of the ecosystem services the insects provided.
In almost all of the studies they looked at, the team found that a more diverse pool of these species translated into more pollination and greater pest control. They also showed that simplified landscapes supported fewer species of service-providing insects, which ultimately led to lower crop yields.
The researchers also looked at a third measure of the makeup of insect populations — what they called "evenness." In natural ecosystems, a handful of dominant species with many more individuals typically live alongside a higher number of rarer species. The team found as landscapes became less diverse, dominant species numbers dwindled and rare species gained ground. This resulting, more equitable mix led to less pollination (though it didn't end up affecting pest control).
"Our study provides strong empirical support for the potential benefits of new pathways to sustainable agriculture that aim to reconcile the protection of biodiversity and the production of food for increasing human populations," Ingolf Steffan-Dewenter, one of the study's authors and an animal ecologist at the University of Würzburg in Germany, said in the statement.
The scientists figure that the richness of pollinator species explains around a third of the harmful impacts of less diverse landscapes, while the richness of pest-controlling species accounts for about half of the same measure. In their view, the results of their research point to the need to protect biodiversity on and around crops in an uncertain future.
"Under future conditions with ongoing global change and more frequent extreme climate events, the value of farmland biodiversity ensuring resilience against environmental disturbances will become even more important," Steffan-Dewenter said.
Reposted with permission from our media associate Mongabay.
Ivory Coast's rainforests have been decimated by cocoa production and what is left is put in peril by a new law that will remove legal protections for thousands of square miles of forests, according to The Guardian.
By Karin Kirk
Greenland had quite the summer. It rose from peaceful obscurity to global headliner as ice melted so swiftly and massively that many were left grasping for adjectives. Then, Greenland's profile was further boosted, albeit not to its delight, when President Trump expressed interest in buying it, only to be summarily dismissed by the Danish prime minister.
During that time I happened to be in East Greenland, both as an observer of the stark effects of climate change and as a witness to local dialogue about presidential real estate aspirations, polar bear migrations and Greenland's sudden emergence as a trending topic.
Heavy metals that may damage a developing brain are present in 95 percent of baby foods on the market. Cirou Frederic / PhotoAlto Agency RF Collections / Getty Images
Heavy metals that may damage a developing brain are present in 95 percent of baby foods on the market, according to new research from the advocacy organization Healthy Babies Bright Futures (HBBF), which bills itself as an alliance of scientists, nonprofit organizations and donors trying to reduce exposures to neurotoxic chemicals during the first three years of development.
By Kerstin Palme
Creepy-crawlies are among the oldest life forms on this planet. Before dinosaurs ever walked the earth, insects were certainly already there. Some estimates date their origins to 400 million years ago. They're also extremely successful. Of the 7 to 8 million species documented on Earth, around three quarters are likely bugs.
But several insect species could disappear for good in the next few decades and that would have serious consequences for humans.
Volvo introduced its first-ever all-electric vehicle this week, kicking off an ambitious plan to slash emissions and phase out solely gas-powered vehicles starting this year.
The report, released Wednesday, found that almost every European who lives in a city is exposed to unhealthy air, Reuters reported.