|Title||Reproductive strategies in desert annuals: test of a fixed germination hypothesis|
|Year of Publication||1978|
|Number of Pages||23|
|University||New Mexico State University|
|City||Las Cruces, New Mexico|
|Thesis Type||M.S. Thesispp|
|Keywords||annual plant, germination, dissertation, dissertations, germination, annual plant, reproduction, annual plant, theses, thesis|
In order to optimize reproduction in unpredictable environments, Cohen has hypothesized that desert annual plant populations maintain a constant proportion of germinating seeds. The two mechanisms by which a population might maintain this germination proportion, constant at the level of the individual, or a constant population mean, have been investigated through a series of germination tests with the annual species, Pectis angustifolia Torr. (Lemonweed). Results indicate that neither of these mechanisms function to maintain a constant germination proportion. Rather, the data suggest an alternative optimal reproductive strategy by which germination proportion increases in response to increased precipitation.