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10,000th Hellbender Released Into the Wild
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HELLBENDER HISTORY -- the 10,000th hellbender was recently released into an Ozark river in an effort to support a declining population for the endangered species. The Saint Louis Zoo, MDC and U.S. Fish and Wildlife Service have partnered together for nearly 20 years during this effort. Learn more in this short video.
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20th-Century doubling in dust archived in an Antarctic Peninsula ice core parallels climate change and desertification in South America
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Crustal dust in the atmosphere impacts Earth’s radiative forcing directly by modifying the radiation budget and affecting cloud nucleation and optical properties, and indirectly through ocean fertilization, which alters carbon sequestration. Increased dust in the atmosphere has been linked to decreased global air tempera- ture in past ice core studies of glacial to interglacial transitions. We present a continuous ice core record of aluminum deposition during recent centuries in the northern Antarctic Peninsula, the most rapidly warming region of the Southern Hemisphere; such a record has not been reported previously. This record shows that aluminosilicate dust deposition more than doubled during the 20th century, coincident with the 1°C Southern Hemisphere warming: a pattern in parallel with increasing air temperatures, decreasing relative humidity, and widespread desertification in Patagonia and northern Argentina. These results have far-reaching implications for understanding the forces driving dust generation and impacts of changing dust levels on climate both in the recent past and future.
aluminosilicate dust global warming human impacts Patagonia radiative transfer
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21st century conservation: A vision of collaboration across landscapes
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Just one week after taking office, the Biden administration proposed an ambitious conservation agenda to stem the loss of biodiversity, enhance environmental equity and justice and curb the drivers of climate change. The agenda envisions engaging state, tribal, local and territorial officials, farmers and forest landowners, fishermen and others to conserve 30 percent of our lands and waters by 2030.
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