Showing posts with label herbarium specimens. Show all posts
Showing posts with label herbarium specimens. Show all posts

Alien Invasion!

I see them every day...aliens hiding among us.  They blend in, making it difficult to pick them out, yet they strike with a fierce intensity. 

No, they're not the folks at White Memorial (contrary to popular belief), nor do they live in underwater cities on the planet of Naboo.  They look harmless, even pleasant, and many of us pass by them without giving it a second thought.

These embryophytic, photosynethetic marauders are altering our ecosystems as we have never seen before.  However, these aliens are now being exposed.

For the past few months, we have been collecting, pressing and preserving samples of invasive alien plants.  Barberry, Multiflora Rose, and Morrow's Honeysuckle have been taking over the understories of our forests since their introduction from foreign shores.  These species, however, are just the tip of the iceberg.  The State of Connecticut lists 96 species of invasive or potentially invasive plants in our area.  Some, like the Autumn Olive, are widespread and well-known.  Many others, such as the Rugosa Rose, have a limited distribution in the State. 


Morrow's Honeysuckle


Much to our surprise, we have already collected samples of 40% of the invasive species on this list.  There are at least five other species we know about on the property but haven't collected, and potentially several other invasives that we haven't yet documented on the property.  Water chestnut, for example, used to be found in Bantam Lake, but thanks to eradication efforts, we were unable to collect any samples of this invasive. 

Why are we going through the trouble of collecting all these samples?  These specimens will be sent to the University of Connecticut herbarium so other scientists can get a better picture of where these invasives are and how we can manage them.  Even though these species seem to pop up everywhere, we have surprisingly few records of invasives in Connecticut.  In fact, many of the specimens we do have were collected decades ago and do not necessarily reflect their distribution in Connecticut.

Below is a list of the invasive plant species found in Connecticut.  We have specimens of the species listed in plain font, but no specimens of those in bold.  You can also learn more about invasive species at White Memorial by visiting our Encyclopedia of Life page.







Herbarium Specimen Preparation -- Invasive Species Vouchers


Nicki Hall mounting preserved invasive plant
specimens collected on White Memorial Foundation.

The specimens and labels are mounted to the herbarium paper
by laying them into a thin layer of adhesive that is spread over a flat surface.  


Every specimen has data that needs to be digitized and stored in a database. 

We have collected specimens from several invasive plant species that inhabit White Memorial Foundation.  These specimens voucher their existence on the property.  Scientists and policy makers can use these specimens in their work when these specimens are stored at Research Herbarium in Connecticut.  This past growing season (2011) was our first year for collecting specimens and we will continue this work until every invasive plant species has a voucher specimen.  This work will help the White Memorial staff prioritize species and habitats that are affected by invasive plants.