Early Detection of Aquatic Invasives Is Key

As the growing season begins to wind down across Pennsylvania, aquatic growth in ponds and lakes does the same. The plants that are the base of the food chain in these aquatic ecosystems slow their growth and begin to taper off as winter's chill is on the horizon. Among the native aquatic plant species though, there also may be aquatic invasives plotting their comeback once warm weather returns.

Invasive species are those that have been introduced to a habitat or ecosystem usually by means of human activity. These natural invaders often outcompete native species and suddenly become dominant in a habitat. Invasive plants are found in a variety of settings, but because many aquatic environments provide a favorable blend of sunlight, nutrients, and growing conditions, aquatic invasives can be especially prominent in and around PA ponds and lakes. The nature of aquatic plants also lends themselves to be easily transported between water bodies after flood events, on the fur and feathers of animals, or on equipment such as boats, oars, and nets.

Identification of invasives is key in stopping their spread and understanding their method of transport. There are many resources available to help.  A new interactive resource from PA iMapInvasives lists some high priority invasives to be on the lookout for and includes interactive Story Maps featuring maps, fact sheets, and videos to aid in identification. Invasive Alligatorweed and Dotted Duckweed are just two of the plants highlighted. Anyone finding these high priority invasives is also asked to report them to the iMapInvasives database. In addition to plants, invasive aquatic invertebrates and fish are also featured as species to "be on the lookout" for.

Penn State Extension also offers a short video on Aquatic Invasives in Pennsylvania as part of its pond management resources, as well as fact sheets on individual plants of concern.