| Autor: |
Saia SM; Depatment of Biological and Agricultural Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States., Carrick HJ; Department of Biology and Institute for Great Lakes Research, Central Michigan University, Mount Pleasant, Michigan 48859, United States., Buda AR; Pasture Systems and Watershed Management Research Unit, Agricultural Research Service, United States Department of Agriculture, University Park, Pennsylvania 16802, United States., Regan JM; Department of Civil and Environmental Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States., Walter MT; Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York 14853, United States. |
| Abstrakt: |
Despite ongoing management efforts, phosphorus (P) loading from agricultural landscapes continues to impair water quality. Wastewater treatment research has enhanced our knowledge of microbial mechanisms influencing P cycling, especially regarding microbes known as polyphosphate accumulating organisms (PAOs) that store P as polyphosphate (polyP) under oxic conditions and release P under anoxic conditions. However, there is limited application of PAO research to reduce agricultural P loading and improve water quality. Herein, we conducted a meta-analysis to identify articles in Web of Science on polyP and its use by PAOs across five disciplines (i.e., wastewater treatment, terrestrial, freshwater, marine, and agriculture). We also summarized research that provides preliminary support for PAO-mediated P cycling in natural habitats. Terrestrial, freshwater, marine, and agriculture disciplines had fewer polyP and PAO articles compared to wastewater treatment, with agriculture consistently having the least. Most meta-analysis articles did not overlap disciplines. We found preliminary support for PAOs in natural habitats and identified several knowledge gaps and research opportunities. There is an urgent need for interdisciplinary research linking PAOs, polyP, and oxygen availability with existing knowledge of P forms and cycling mechanisms in natural and agricultural environments to improve agricultural P management strategies and achieve water quality goals. |
