title: The impact of ornithogenic inputs on phosphorous transport from altered wetland soils to waterways in East Mediterranean ecosystem.
abstract: Large flocks of Eurasian crane (Grus grus, >35,000) have begun wintering in an altered wetland agro-ecosystem located in Northern Israel, a phenomenon that attracts more than 400,000 eco-tourists a year. A 100-ha plot has been used to feed the cranes in order to protect nearby fields. The objective of this study was to evaluate the influence of this bird's feeding practice on the P status of the altered wetland soils and waterways. We installed a series of wells at two depths (40 and 90 cm) between two major waterways in the feeding area and monitored the hydraulic heads and collected groundwater samples for elemental analyses. We collected six soil cores and four sediment samples from the waterways and conducted sequential P extraction. We found significant increase in groundwater soluble reactive P (SRP) (>0.5 mg l(-1)) compared with much lower concentrations (~0.06 mg l(-1)) collected in the period prior to the feeding. We found significant decrease in Fe((II)), Ca, and SO4 concentrations in the shallow groundwater (33, 208, and 213 mg l(-1), respectively) compared with the period prior to the feeding (47, 460, and 370 mg l(-1) respectively). An increase in the more labile P fraction was observed in soils and sediments compared with the period before the feeding. The P input by bird excrement to the feeding area was estimated around 700 kg P per season, while P removal by plant harvesting was estimated around 640 kg Pyr(-1). This finding supports the current eco-tourism practices in the middle of intensive farming area, suggesting little impact on waterways.
authors.affiliation: Tel Hai College, Upper Galilee 12208, Israel; MIGAL Research Institute, Upper Galilee 11016, Israel. Electronic address: litaori@telhai.ac.il.
authors.forename: M Iggy
authors.initials: MI
authors.lastname: Litaor
authors.affiliation: Tel Hai College, Upper Galilee 12208, Israel; MIGAL Research Institute, Upper Galilee 11016, Israel.
authors.forename: O
authors.initials: O
authors.lastname: Reichmann
authors.affiliation: Tel Hai College, Upper Galilee 12208, Israel.
authors.forename: E
authors.initials: E
authors.lastname: Dente
authors.affiliation: Tel Hai College, Upper Galilee 12208, Israel.
authors.forename: A
authors.initials: A
authors.lastname: Naftaly
authors.affiliation: The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel.
authors.forename: M
authors.initials: M
authors.lastname: Shenker
mesh_terms: D000383:Agriculture; D000818:Animals; D001717:Birds; D017753:Ecosystem; D004784:Environmental Monitoring; D005243:Feces / Q000737:chemistry; D007557:Israel; D010758:Phosphorus / Q000032:analysis*; D012621:Seasons; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D053833:Wetlands
chemical_list: D012987:Soil; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D010758:Phosphorus
keywords: Bird excrement; Birds–soil–plant interactions; P transportability