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INVASIVE SPECIES MANAGEMENT
Hawaii introduced black wattle as a forestry tree; it escaped cultivation and now chokes about 3,000 acres of Maui pasture, gulches, and empty lotsBlack wattle has become a formidable invasive force in Hawaii, spreading rapidly beyond its initial planting zones into the island's treasu...- They cleared invasive shrubs from a Pennsylvania forest; What grew back surprised researchersResearchers cleared 18 invasive shrub species from a Pennsylvania woodland and followed it for seven years. Native plants and young trees r...
- Scientists released 600 beetles into 30 identical landscapes; after 13 generations, some traveled three times farther than others despite the same lab conditionsA 2009 research highlighted that the movement patterns of species are far more erratic than earlier assumptions suggested, due to inherent ...
- In the late 1800s, America imported Japanese hops for medicine and gardens; escaped vines can now form 4-foot-thick blankets with thousands of plants per acreIntroduced to the United States in the late 1800s, Japanese hops were initially valued for their ornamental and medicinal qualities. Howeve...
- Over 30,000 species face critical danger: Amazon's Jeff Bezos backs $500 million wildlife plan, but one key detail is missingLaunched at the UN Biodiversity Conference, the New Species Recovery Alliance has garnered a substantial pledge of $500 million. This colla...
- Before 1850, Americans grew Dyer’s woad for blue dye; in the Great Basin, one infestation later grew from 12,000 to 150,000 acres in eight yearsDyer's woad, once used for blue dye, has become an invasive species in the American West. This plant produces a high number of seeds and th...
- Lake Champlain began killing invasive sea lampreys in 1990; native lake trout survival rose 25%, and Atlantic salmon returns to the main lake fishery tripledLake Champlain experienced significant ecological harm due to the invasive sea lamprey, which posed a threat to local fish populations. How...
- In the late 1800s, Americans planted lesser celandine for its bright yellow flowers; it escaped gardens, reached 31 states and covered 400 acres in one Ohio parkLesser celandine, once embraced for its beauty, has turned into a significant environmental challenge across multiple regions. This invasiv...
- By the late 1700s, European periwinkles had reached America; planted as ornamental ground cover, escaped plants covered 29,254 acres across 12 Southern states by 2008European periwinkles, once introduced to enhance gardens in the US, have become a troublesome invasive species in natural habitats. Their s...
- Nevada removed invasive blue tilapia from Moapa dace habitat from 2009 to 2012; the endangered fish later returned to an 868-meter stretch where it had vanishedConservation efforts in Nevada have successfully removed invasive blue tilapia to protect the native Moapa dace fish. After targeted remova...
- Connecticut began clearing an invasive reed from Highstead Pond in 2012; 98% was killed, and by 2017 native plant richness around the pond had increased 39%Highstead Preserve embarked on an ambitious multi-year project aimed at controlling the invasive common reed to foster the growth of native...
- In East Texas, excluding feral hogs from forest plots for 7 years more than doubled the abundance of woody plant species with large seedsIn the Big Thicket National Preserve, feral hogs significantly disrupt forest ecosystems by consuming seeds and disturbing soil. A study re...
- Montana removed non-native brook trout and repaired mining-damaged White's Creek; the struggling native cutthroat trout population then grew at least sevenfoldIn White's Creek, Montana, a dedicated conservation project took shape to safeguard the native westslope cutthroat trout from the encroachm...
- Colorado began removing non-native brook trout from two mountain creeks in 2011; 13 years later, rare native cutthroat trout had increased more than 11-foldOver a span of 13 years in Grand County, Colorado, dedicated conservation efforts have led to a remarkable surge in cutthroat trout populat...
- North Carolina removed invasive carp from Lake Mattamuskeet in a restoration effort; an earlier removal campaign increased water clarity more than fourfold and expanded underwater grasses by 16,000 acresLake Mattamuskeet in North Carolina has seen a dedicated restoration initiative aimed at curbing the invasive common carp's adverse effects...
- In 1848, California nursery operators brought pampas grass to Santa Barbara; it spread across the state, and one stand can release millions of seeds each yearPampas grass made its debut in California in 1848, admired for its striking appearance as an ornamental plant. However, its vigorous reprod...
- America brought yellow flag iris in for gardens; it escaped into wetlands, reached more than 40 states, and now congests water flow while crowding out native plantsThe yellow flag iris, first brought to North America in the 1800s, quickly evolved from an ornamental plant to a widespread ecological thre...
- In 1921, America introduced cogongrass as a forage crop; later used for soil control, the invasive grass now covers more than 1 million acres in FloridaCogongrass was brought to the United States in the early 20th century with the noble goal of supporting agriculture and curbing erosion. Ho...
- In 2002, black rats were eradicated from Hawaii's Mokoliʻi islet; after just one shearwater chick survived from 1999 to 2001, 126 fledged in 2002 and 185 in 2003Mokoliʻi was once severely impacted by invasive black rats, which posed major risks to seabird species. In 2002, after dedicated conservati...
- Amur honeysuckle arrived in America as an ornamental shrub; it later became a major invasive concern in forests across the northern United StatesIntroduced over a century ago, Amur honeysuckle quickly spread across the United States as an ornamental plant, but its aggressive growth h...
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