Sorry, but this technicality bugs me. A Sepia Tone is when you tone your image with sepia. A "Sepia red tone" is actually just a "red tone." My apologies for the grammar-nazi urge that I had to sate right there...

Sepia was originally a popular toning process to apply to black and white prints because the chemistry involved created a slightly more durable photograph. It also mimicked the discoloration process that happened to earlier chemical processes. Thus, sepia toning in the digital age is a cultural response. We think of images colored in this way as having an Olde Time look, and so it's a nice way to create a sense of history in an image.

Valerie-Ducom's sepia toned image illustrates the point nicely. The sepia image gives a sense of a much older nature scene than any of the others.

If it were my photo, I'd consider adding a Hue/Saturation layer beneath the toning layer, which shifted the blue to a noticably different value, to help seperate the background. I tend to find that this sort of monochromatic toning creates a very graphic-illustration look to my images, so I'm less concerned about maintaining realism in value-relationships.

They had chained him down to things that are, and had then explained the workings of those things till mystery had gone out of the world....And when he had failed to find [wonder and mystery] in things whose laws are known and measurable, they told him he lacked imagination, and was immature because he preferred dream-illusions to the illusions of our physical creation.
      -- HP Lovecraft, The Silver Key