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GRAVEL SUPPLEMENTATION FOR FISH HABITAT
The hidden owl war: An invasive owl is conquering ancient forests, putting the threatened northern spotted owl at even greater riskInvasive barred owls are occupying ancient forests vital for northern spotted owls. These aggressive competitors concentrate in the exact h...- In 2011, USGS researchers began studying Lake Erie's fish and seasonal hypoxia across a multi-year project. 15 years later, the findings showed fish crowding areas near 2–3 mg/L oxygen, revealing an unexpected shift at the edges of low-oxygen zonesLake Erie’s seasonal hypoxia is changing where fish gather. For years, scientists watched oxygen levels fall and fish move around the lake....
- In 2001, Denmark turned a 19-km straight river into a 26-km winding one, but decades later researchers found nature was still struggling to rebuild what humans had destroyedDenmark's Skjern River restoration has skillfully reshaped a once-straight channel back into a meandering waterway. This innovative initiat...
- Between 2001 and 2010, more than 2,500 New York subway cars were sunk into the Atlantic — decades later, they have become a thriving underwater reefA fleet of old subway cars from New York City has found an unexpected second life at the bottom of the Atlantic Ocean. Sunk off the Delawar...
- By the mid-2010s, California agencies had placed more than 200,000 tons of gravel below Keswick Dam, restoring egg-laying habitat for endangered salmonIn an initiative aimed at revitalizing the spawning grounds for the endangered winter-run Chinook salmon, California has been transporting ...
- By the mid-2010s, California agencies had placed more than 200,000 tons of gravel below Keswick Dam, restoring egg-laying habitat for endangered salmonThe construction of dams along the Sacramento River hindered the natural flow of gravel that is essential for salmon spawning. Efforts are ...
- In 2011, California turned dormant rice fields into winter salmon nurseries; the young fish grew up to eight times faster than in riversFlooded rice fields in California's Yolo Bypass are helping young salmon grow significantly faster. These fields provide a rich food source...
- 2 New Orleans students crushed millions of discarded bottles into recycled glass sand to fight coastal erosion; the result transformed Louisiana's sinking marshes by anchoring new grass and helping rebuild one of America's most vulnerable coastlinesTwo New Orleans students saw a problem hiding in plain sight: discarded glass had little practical recycling value in their city, while Lou...
- Hidden in Uganda's swamps, this 4-foot-tall bird looks like a living dinosaur, complete with a fearsome hooked bill and a machine-gun-like call; scientists still don't fully understand its strange evolutionUganda’s shoebill is one of Africa’s strangest birds, standing up to 140 centimeters tall with a huge hooked bill built for catching large ...
- In 1963, federal engineers completed Glen Canyon Dam in Arizona for water storage and power, which turned the Colorado River colder and disrupted native fish reproductionGlen Canyon Dam altered the Colorado River's temperature and flow significantly. This change negatively affected the endangered humpback ch...
- In the 1800s, Americans planted tamarisk for windbreaks and erosion control; by 2005, the tree had spread across western river systems and become a major management concernTamarisk was originally brought in for various practical applications, but it has since proliferated across western waterways. This invasiv...
- From 1877, officials stocked over 33 million fish in Yosemite for anglers, altering fishless lakes and reducing habitat for native yellow-legged frogsYosemite's lakes, once fishless, received over 33 million stocked fish between 1877 and 1990. Introduced trout preyed on native species and...
- In 1970, Sylvia Earle led five women into an underwater laboratory on a 14-day mission that helped strengthen the case for women in extreme-environment scienceThe year 1970 marked a groundbreaking moment when five female aquanauts embarked on a 14-day journey under the sea in the Tektite II projec...
- Put down the screwdriver; a forked hand weeder can help remove gravel driveway weeds below the crownGravel driveways often see a rapid resurgence of weeds because their roots hide beneath the surface. For successful removal, use a speciali...
- Britain used discarded seafood waste and engineered reef habitats to solve the collapse of native oyster ecosystems; the result transformed lifeless seabeds into thriving underwater habitats capable of supporting oysters, fish, and countless marine speciesBritain is deploying concrete reef cubes and scallop shells to revive native oyster populations. These structures aim to provide essential ...
- 5ft tall, 7ft wingspan and a striking black-and-white body: IAS officer shares video of black-necked stork. Why is this giant bird ‘Near Threatened’?IAS officer Sanjay Kumar recently shared a video of the black-necked stork, highlighting its impressive height of nearly 5ft and wingspan e...
- This ‘rock’ in Namibia is actually a plant that plays dead, fewer than 200 are leftThis ‘living stone’ plant in Namibia looks like a rock and plays dead to survive. Fewer than 200 remain as the rare species faces extinctio...
- In 1969, California biologist Phil Pister carried endangered Owens pupfish across hazardous terrain in two buckets; in 2024, a seventh refuge population was establishedIn a dramatic rescue in 1969, biologist Phil Pister painstakingly transported the last of the Owens pupfish through challenging landscapes ...
- In 2006, Canada launched a mission to save Atlantic salmon. Nearly 20 years later, the fish are returningAtlantic salmon populations declined due to habitat destruction and overfishing. Conservation efforts involving captive breeding and habita...
- In 2011, the US began tearing down two century-old dams on Washington's Elwha River, the largest dam removal in US history at the time, freeing over 20 million cubic yards of trapped sedimentThe Elwha River dams were dismantled after nearly a century of operation. This significant engineering project restored over ninety miles o...
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