Poster

         Ecology

Woody cover negatively affects diversity of the aboveground plant community and soil seedbank in central Texas.

Presenting Author
Peter Eludini
Description
The rangelands of central Texas have experienced striking shifts in vegetation dominance over the past century. Open savannas and grasslands are increasingly threatened by the encroachment of woody plants, as a consequence largely of past grazing and reductions in fire frequency. Restoration of such rangelands is a major focus of management in the region. Following clearing of shrubs by fire or mechanical thinning, restoration depends upon seed dispersal from existing stands of vegetation, sowing of seed purchased from seed companies, or seed germination from soil stored seedbanks. Soil seed banks, however, represent cryptic diversity and are difficult to study. The focus of our research was to determine how woody invasive species alter the soil stored seedbanks in Texas. We showed that the understory plant population reduces drastically with an increase in Juniperus cover and mean annual precipitation. Generally, we found that there are few seeds stored in the soil seedbanks of central Texas. The soil stored seeds under Juniperus reduces with increasing cover. This work provides important predictions of restoration potential and vegetation resilience through the quantification of seed stored in the soil seed bank.