Exploring the Forest Community Ecology of the Imperiled Orchid, Isotria medeoloides

Small-whorled pogonia (Isotria medeoloides (Pursh) Raf.) is diminutive terrestrial orchid and one of the rarest in North America, with a disjunct distribution from Maine and Georgia. This orchid is associated with mid-successional forests and it is believed that late successional forests are too shady to support this species. Experiments conducted in northern US states concur […]

Read More…

Canopy Thinning and Death Impacts Growth and Reproduction of Isotria medeoloides – a Federally Threatened orchid

Screenshot of Canopy Thinning and Death Impacts Growth and Reproduction of Isotria medeoloides - a Federally Threatened orchid video

Dennis Whigham,¬†Smithsonian Environmental Research Center Long-term monitoring of Isotria medeoloides at two sites in Virginia have been combined with observations from an understory thinning experiment at one site and death of a large canopy tree at a second site. New plants emerged at both sites following increased light levels and flowering and fruit production increased. […]

Read More…

Identifying Drivers of Orchid Population Dynamics: An Example in the Federally-Listed Threatened Orchid, Isotria medeoloides

Screenshot of Identifying Drivers of Orchid Population Dynamics video.

Melissa K. McCormick, Dennis F. Whigham, Rachel Rock-Blake, Hope E.A. Brooks North American Orchid Conservation Center (NAOCC) and Smithsonian Environmental Research Center (SERC) Orchids are widely threatened and endangered worldwide, but efforts to conserve and restore them has been limited by not knowing about the pollinators and fungi they need to grow and reproduce. The […]

Read More…