Spatial and Temporal Distribution of Total Phosphorus in Sediments of Shuangtai Estuary Wetland during the Period of Reed Growth

Phosphorus is an essential macronutrient that plays a crucial role in the regulation of biological productivity and biogeochemical cycling other biogenic elements. As large tidal wetland dominated by reeds Liaoning province, China, Shuangtai estuary unique ecosystem class. To better understand spatial temporal distributions total phosphorus (TP) sediments during period reed growth, eight sampling sites were established within wetland, approximately 11 to 24 km from Liaohe River. These sampled once month at multiple sediment depth intervals between April October 2018 2019, periods time corresponded with growth period. An alkali fusion method was used determine TP samples. The results show content ranged 0.001 0.781 mg/kg, decreases southwest northeast increase depth. reaches maximum corresponding fastest stage (June July), while minimum occurs (i.e., maturity reeds). variation law cross-sectional deeper are, lower content; its surface soil. each site tends be stable increasing has regularly dynamic seasonal reeds.