Effect of American bison (Bison bison L.) on the recovery and germinability of seeds of range forage species


GRASS AND FORAGE SCIENCE, vol.57, no.4, pp.395-400, 2002 (Journal Indexed in SCI Expanded)

  • Publication Type: Article / Article
  • Volume: 57 Issue: 4
  • Publication Date: 2002
  • Title of Journal : GRASS AND FORAGE SCIENCE
  • Page Numbers: pp.395-400


The effect of passage through the digestive tract of Bison
bison on the recovery and germinability of undamaged
passed seeds of Pseudoroegneria spicata, Elymus cinereus,
Oryzopsis hymenoides, Stipa comata, Balsamorhiza sagittata
and Sphaeralcea coccinea was tested. Recovery of undamaged
passed seeds peaked 2 days after ingestion and
then decreased to the lowest level on day 5 of sample
collection for all species used, but the pattern of seed
passage through time significantly differed among
species. Recovery of passed seeds was greatest for
round-shaped, hard seed-coated O. hymenoides and
lowest for largest seed-sized B. sagittata. The digestive
tract of B. bison did not break seed dormancy of
O. hymenoides, S. comata, S. coccinea or B. sagittata.
Germination percentage of P. spicata and E. cinereus
seeds decreased compared with unpassed seeds of the
same species.