What is the impact of legacy #phosphorus? New research from @USGS_Water looks at this question & finds of143 sites, 49 were contributing legacy P rivers downstream, most likely due to #manure and #fertilizer inputs from the 1980s: https://t.co/ziK4Hqmu
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@USGS The study https://t.co/o0fCQ6vlPL What has increased dramatically in the past 20-25 years has been livestock moving from pastures / small farms to CAFOs. More animals = more manure.
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RT @FluvialBenthos: Stackpoole et al. in @PNASNews- Variable impacts of contemporary versus legacy agricultural #phosphorus on US river #wa…