Do i need to be concerned about this board splitting?

Was looking at the deck today and noticed this crack running down the middle of the exterior board. There's a 2x10 right behind it that the decking is actually sitting on, but the two are fastened together by screws. Not sure if this is something to be necessarily concerned about at all or not.

Was looking at the deck today and noticed this crack running down the middle of the exterior board. There's a 2x10 right behind it that the decking is actually sitting on, but the two are fastened together by screws. Not sure if this is something to be necessarily concerned about at all or not.