Open your doors, Lebanon, so that fire may devour your cedars! Wail, you juniper, for the cedar has fallen; the stately trees are ruined! Wail, oaks of Bashan; the dense forest has been cut down! Listen to the wail of the shepherds; their rich pastures are destroyed! Listen to the roar of the lions; the lush thicket of the Jordan is ruined!
In Judaism, trees represent man's connection to the physical world. Here, we see that the trees have been destroyed and the rich people of Israel are mourning. This speaks to the fact that the people of Israel were going to be judged and lose their material blessings.