Coniferous trees once figured prominently in the makeup of Penn's Woods, but their populations never fully recovered from the deforestation of the nineteenth century. Now Pennsylvania's conifers face a new threat: invasive competitors and pests, warmer and wetter weather, and other disruptions linked to climate change.

We explore an evergreen topic with Joe Stavish of Tree Pittsburgh in advance of the group's upcoming Conifer Symposium on June 14.