when inspecting the denoising stats from dada2, I am wondering if the forward and reverse read are counted as a single read. Below I've added an image of a part of the stats output. Let's take a look at sample PD1_A1. The total number of reads of this sample is 211092 (I assume half of it are forward reads and the other half are reverse reads). After filtering and denoising, 162356 reads are left. Then merging is performed and this results in a total of 113814 reads after merging.
However, if the 162356 reads before merging consist of approximately half forward and half reverse reads, wouldn't you at least expect for the number of reads to be halved after merging? So in that case you would have a maximum of 81178 (=162356/2), because 2 reads (fw and rev) are merged to a single read.
Am I interpreting the stats output incorrectly?