The impact of ornithogenic inputs on phosphorous transport from altered wetland soils to waterways in East Mediterranean ecosystem

摘要: Abstract Large flocks of Eurasian crane ( Grus grus , > 35,000) have begun wintering in an altered wetland agro-ecosystem located Northern Israel, a phenomenon that attracts more than 400,000 eco-tourists year. A 100-ha plot has been used to feed the cranes order protect nearby fields. The objective this study was evaluate influence bird's feeding practice on P status soils and waterways. We installed series wells at two depths (40 90 cm) between major waterways area monitored hydraulic heads collected groundwater samples for elemental analyses. six soil cores four sediment from conducted sequential extraction. found significant increase soluble reactive (SRP) (> 0.5 mg l − 1 ) compared with much lower concentrations (~ 0.06 mg l period prior feeding. decrease Fe (II) Ca, SO 4 shallow (33, 208, 213 mg l respectively) (47, 460, 370 mg l respectively). An labile fraction observed sediments before input by bird excrement estimated around 700 kg per season, while removal plant harvesting 640 kg P yr . This finding supports current eco-tourism practices middle intensive farming area, suggesting little impact