I haven.t noticed the bayou biome in your list. Well I believe bayou refers to a region of Southern Louisiana? It's not that different from a mangrove.

I picture the conifer forest like this: https://www.britannica.com/science/coniferous-forest
http://www.nrcan.gc.ca/sites/www.nrc...876px_USED.jpg

And the taiga like this: https://www.livescience.com/1350-sur...nts-trees.html
http://labdendro.uqar.ca/wp-content/...17_recadre.jpg

It is basically a transition from a dense forest to a sparse one with small trees. From an artistic perspective it's a big deal. If you want to portray the biome accurately, you need to break the canopy and separate the trees in smaller groups.
The same is true for the savanna and mediterranean biome to some extend.


Form the equator, the progression look like this and is pretty consistent laterally over a large region.
Tropical > savanna > steppe > desert > steppe > Mediterranean > Deciduous > mixed > coniferous > taiga > tundra > polar
Ghana >Burkina Faso (south)> Sahel > Mali >North africa> South Europe and North Africa> Most of Europe > South Scandinavia, Baltic > Central Scandinavia, Scottish highlands > Kola P.> North Europe, Iceland, Greenland coast > Greenland