Appendix B. A figure showing alkaline/acid phosphatase (APA) activity relative to leucine-aminopeptidase (LAMP) activity and net nitrogen uptake by periphyton from Stony Brook incubated in Stony Brook water and Stony Creek water receiving prior exposure to substrata from an abandoned mine drainage (AMD)-impacted stream in order to lower the P concentration of Stony Brook water.

A figure showing alkaline/acid phosphatase (APA) activity relative to leucine-aminopeptidase (LAMP) activity and net nitrogen uptake by periphyton from Stony Brook incubated in Stony Brook water and Stony Creek water receiving prior exposure to substrata from an abandoned mine drainage (AMD)-impacted stream in order to lower the P concentration of Stony Brook water.

该图展示了从石溪（Stony Brook）采集的周丛生物（periphyton）在两种水体中培养后的两项指标：一是碱性/酸性磷酸酶（alkaline/acid phosphatase, APA）活性与亮氨酸氨基肽酶（leucine-aminopeptidase, LAMP）活性的比值，二是周丛生物的净氮摄取量。本次实验所用的两种培养水体分别为石溪原生水体，以及预先接触过受废弃矿山排水（abandoned mine drainage, AMD）影响的溪流基质的石溪（Stony Creek）水体，实验旨在降低石溪水体的磷浓度。