ArticleResearch square2026
Wetland Soil Phosphorus and Phosphorus Sorption Capacity in Wastewater-impacted and Unimpacted Wetlands, NH USA.
Article in Research square, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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2 authors.
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Abstract
The long-term impact of treated wastewater effluent on the soil in a 7.3 ha emergent marsh in southwestern New Hampshire, USA, known locally as Beaver Dam Marsh (BDM), was evaluated by comparison to four nearby unaffected wetlands. We hypothesized that 40 years of wastewater input would result in a higher phosphorus saturation ratio (PSR), lower soil phosphorus storage capacity (SPSC), and higher total phosphorus (TP) in the soils of BDM. Samples of the surface soil and the subsoil were collected and analyzed for TP via colorimetric analysis and extractable phosphorus, aluminum and iron via Mehlich-3 extraction paired with Inductively Coupled Plasma (ICP) spectroscopy. The surface soil of BDM showed no significant difference in PSR (p = 0.90) and SPSC (p = 0.79) while the subsoil exhibited a significantly lower PSR (p = 0.029) than the unaffected wetlands. Additionally, there was a significantly lower TP by dry mass in BDM surface soil than the reference wetlands (p = 2.3 × 10
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