Need ID for Tree & Vine Please

We have tree's growning out back which have different kinds of berry's on them. Here is one that is covered with deep purple or black colored berry's.

Also there are vines which snake up high in the tree's (my sister says they are edible grapes, and she calls the vines tarzan vines). anyway they do look like grapes but I want to be sure, before anyone eats them.

 

You can compare them with the ones in your area. LINK

 

First two pics look like a buckthorn.

 

5 and 6 looks like a species of wild grapes, vitis aestivalis? fits with what I can see of your pictures

found a link that could be usefull, can look up other species there aswell,

http://www.cnr.vt.edu/DENDRO/dendrology/syllabus/factsheet.cfm?ID=130

 

Thank you all for your replies, I am learning so much about the plants and trees on my dads land. I never knew how interesting it could be, I am having so much fun exploring and taking pictures. I checked out those links and they definately do look like buckthorn and grapes. I have some more to ID, will start new thread. I don't know if thats how your supposed to do it or not..

 

Yes, that's preferable. Thank you!