Displaying items by tag: endangered species

The snail darter, which caused an epic battle around TVA plans to dam the Tellico River in the 1970s, was recently removed from the Endangered Species List. Jeremy Monroe/Tennessee Aquarium

The little fish that caused a maelstrom over a TVA dam project gets the last laugh

TELLICO — In a win for endangered species protected by federal law, the U.S. Fish and Wildlife Service announced this week the fabled snail darter’s recovery and removal from the Federal List of Threatened and Endangered Wildlife. 

Native to the Tennessee River watershed in Alabama, Georgia, Mississippi and Tennessee, the fish has long been an Endangered Species Act icon thanks to conservation efforts to save its habitat starting in the 1970s, when the Tennessee Valley Authority proposed construction of a dam on the Little Tennessee River. The snail darter (Percina tanasi) was central in the 1978 U.S. Supreme Court case Tennessee Valley Authority v. Hill, which solidified the scope of the then recently passed ESA. 

 A monarch butterfly, recently declared endangered despite decades of conservation, is seen atop a coneflower. Stephen Lyn Bales

Dramatic monarch declines mean the bell tolls for we

KNOXVILLE — Monarch butterflies are ephemeral by nature. The orange and black dalliances that flitter through our lives, our yards, and our countryside like motes of dust are here one minute and gone the next. We pause for a few seconds to watch the “flutter-bys” and then move on.

For about all of the Lepidopteran family, where they come from, where they go, their raison d'être, we don’t ask. They are winged wisps that pass through our busy lives. But that is not true with this orange and black butterfly, named to honor King William III of England, the Prince of Orange. But two people did ask.

Norah and Fred Urquhart lived in Southern Canada and in the late 1930s they noticed that the monarch butterflies seemed to all be fluttering south this time of the year. Could they possibly be migrating and if so, where did they go? The notion that a butterfly might migrate south for the winter seemed hard to fathom. Yes, broad-winged hawks migrate. But a flimsy butterfly?

NYT: Recovering America’s Wildlife Act a big bipartisan push to preserve animal species

New York Times columnist Margaret Renkl noted recently that a precious opportunity has presented itself to strengthen wildlife-protection laws and add to environmental protections across the nation.

The Nashville-based journalist said the act, known as RAWA, “is poised to become the single most effective tool in combating biodiversity loss since the Endangered Species Act.” The resolution is carried in the House by Michigan Democrat Rep. Debbie Dingell.

“This bill provides funding for (1) the conservation or restoration of wildlife and plant species of greatest conservation need; (2) the wildlife conservation strategies of states, territories, or the District of Columbia; and (3) wildlife conservation education and recreation projects,” according to the U.S. Congress.

Aquatic ecologist Natalie Griffiths studies nutrients and contaminants in the Weber Branch watershed, which is in the Oak Ridge Environmental Research Park. Courtesy Carlos Jones/ORNL

ORNL research lands are an international ecological benchmark and diverse wonderland of trees, plants, mammals, reptiles and amphibians

Abby Bower is a science writer for Oak Ridge National Laboratory.

The Department of Energy’s Oak Ridge National Laboratory (ORNL) is a hub for world-class science. The nearly 33,000-acre space surrounding the lab is less known, but also unique. The Oak Ridge Reservation (ORR) is a key hotspot for biodiversity in the Southeast and is home to more than 1,500 species of plants and animals.

At the intersection of Anderson and Roane counties is an important subset of the reservation — the Oak Ridge National Environmental Research Park, or NERP — a 20,000-acre ORNL research facility that has been internationally recognized by UNESCO as an official biosphere reserve unit.

“The National Environmental Research Park is a living laboratory and a major resource for conducting ecological studies,” said Evin Carter, an ORNL wildlife ecologist and director of the Southern Appalachian Man and the Biosphere Program, or SAMAB. The NERP has been a core part of SAMAB, which has focused on sustainable economic development and conserving biodiversity in Southern Appalachia since 1989.

With ORNL researchers and scientists from government agencies and academia using the NERP for diverse experiments each year, the park lives up to its status as a living laboratory.

It also lives up to its reputation as a biodiversity hotspot. As one of seven DOE-established environmental research parks reflecting North America’s major ecoregions, it represents the Eastern Deciduous Forest. The NERP comprises parts of this ecoregion that have been identified repeatedly as priorities for global biodiversity conservation, Carter said.

This designation means more than ever as climate change alters ecosystems and biodiversity declines worldwide. According to a landmark international report, on Biodiversity and Ecosystem Services, around one million plant and animal species are currently threatened with extinction. 

The Tennessee Aquarium’s Gentoo penguin chick weighs more than 2 kilograms at 28 weeks old. Casey Phillips/Tennessee Aquarium 

Baby penguin, endangered turtles and puffer fish are the newest additions to the Tennessee Aquarium

(Casey Phillips is a communications specialist at the Tennessee Aquarium in Chattanooga)

As any parent knows, kids tend to do whatever you least expect. In the case of an endangered four-eyed turtle hatchling at the Tennessee Aquarium, however, merely existing was — in itself — a huge surprise. 

On July 11, a volunteer was tending an enclosure in a backup area of the River Journey exhibit. This habitat was only supposed to house a female endangered four-eyed turtle (Sacalia quadriocellata, a largely montaine species native to parts of China and Vietnam), but the volunteer soon discovered that the adult turtle wasn’t alone. Perched atop a layer of vegetation was a tiny hatchling that, by all accounts, shouldn’t have been there.

“The adult female hadn’t been with a male in over a year, so we did not check to see if she had laid this year,” says Bill Hughes, the aquarium’s herpetology coordinator. “To say the least, finding an egg, let alone a hatchling, was unexpected.”

Tennessee Aquarium Herpetology Coordinator Bill Hughes holds a recently hatched endangered four-eyed turtle.  Casey Phillips/Tennessee Aquarium

Daily Times: Biologists keep a close eye on imperiled mussel populations in Little River and beyond

The Little River in Blount County just west of Great Smoky Mountains National Park hosted just one of five known fine-rayed pigtoed mussel populations when federal officials placed the mussel on the Endangered Species List in 1976. 

The Daily Times in Maryville reports that the U.S. Fish and Wildlife Service is now conducting a regular five-year review of the mussel's status. It is one of at least 12 mussel species in the river, which has its headwaters in the Great Smoky Mountains and flows through Townsend on its way to its ultimate destination: the Tennessee River. Little River is the main source of water for an expanding Blount County population.

Native mussel populations face the same threats as many non-game fish in the Southern Appalachians. Oxygen is depleted by sediment plumes, which also smother fish eggs, and many mussels rely on small fish to reproduce.

“Reproduction depends on host fish. During the larval stage the young are stuck together in a packet that resembles the prey of shiners and minnows, which is how they become attached to the fish gills or fins to grow for a few weeks,” the Daily Times reports.