Batch equilibrium phosphorus concentration (EPC₀) methods were applied to determine phosphorus capacity of sediments from three agriculturally influenced tributaries in southern Ontario – Belle River, Big Creek, and Nissouri Creek. Aliquots of sediments were amended with soluble reactive phosphorus and incubated at four temperatures (5, 15, 25, and 35°C). Batches of sediments from each location and temperature were also subjected to a treatment; gamma (γ)-irradiated at 28 kGy over 24-h (sterilized) and compared to non-sterilized biotic samples. Treatment showed a significant effect on EPC₀ in Belle River and Nissouri Creek but non-significant effect in Big Creek. Temperature showed a significant effect in Belle River, Nissouri Creek, and the biotic subset of Big Creek. While direction of shift was not consistent in all cases, the biotic subsets of all three locations showed a significant effect of temperature.

采用批次平衡磷浓度（EPC ₀）方法来确定安大略省南部的三个受到农业影响的支流–百丽河，大河和尼苏里河的沉积物的磷容量。用可溶的活性磷修正等分的沉积物，并在四个温度（5、15、25和35°C）下孵育。还对来自每个位置和温度的一批沉积物进行了处理。γ（γ）在24小时内以28 kGy辐射（灭菌），并与未灭菌的生物样品进行比较。治疗对EPC有明显作用₀在百丽河和Nissouri Creek中发挥作用，但在Big Creek中影响不显着。温度在百丽河，尼苏里克里克和大河的生物子集中表现出显着影响。尽管在所有情况下移动方向均不一致，但所有三个位置的生物亚组均显示出明显的温度效应。