Short-Term Response of Aquatic Metabolism to Hydrologic Pulsing in the Coastal Wetlands of Yellow River Delta

摘要: Freshwater supplementation is often used for wetland restoration and ecosystem health protection. Understanding temporal patterns of aquatic metabolism caused by freshwater may help optimize designs. We investigated the short-term changes in potential driving factors at two sites dominated Phragmites australis Suaeda salsa, respectively, a restored coastal located Yellow River Delta. Results showed that was influenced supplementation. There wide range variation gross primary production (GPP) from 0.04 to 49.78 mg O2 L−1 d−1, respiration (ER) 3.37 45.86 mg net (NEM) −12.92 9.01 mg d−1. GPP more sensitive than ER as response flooding and, thus, decreases NEM led change autotrophic heterotrophic or within one day. Several factors, including water depth, nutrient, salinity, pH, turbidity, collectively metabolism. Salinity particularly important factor affected rate wetland. These findings suggest moderate flow (e. g., ≤ 20 cm d−1) increase post-flooding.