Klemow, Kenneth M. 1983. POPULATION BIOLOGY OF BUTTERFLYWEED IN AN ABANDONED LIMESTONE QUARRY. Contributed poster: Pennsylvania Academy of Science meeting. Abstract: Proceedings of the Pennsylvania Academy of Science 57:123.
Butterflyweed (Asclepias tuberosa L. (Asclepiadaceae)) is a perennial plant that is found locally on well-drained, open, calcareous sites throughout the eastern United States. It is a principal colonizing species within an abandoned limestone quarry near Syracuse, New York. To determine the direction and rate of population flux within the quarry, seedling emergence, plant survival, and reproduction were monitored for six years (1976-1981). The density of A. tuberosa decreased markedly over the duration of the study. Sequential droughty years from 1977 through 1979 were most likely the principal cause of population decline. Moreover, recruitment from seed was quite low in those years due to seed predation and to rapid desiccation among newly emergent seedlings. These findings will be discussed in relation.to the overall process of plant colonization on severely disturbed sites such as the Syracuse quarry.