Climate controls on grass culm production over a quarter century in a tallgrass prairie
The flowering of grasses is a process critical to plant population dynamics and genetics, herbivore performance, and human health. To better understand the climate factors governing grass flowering, we analyzed the patterns of culm production over 25 years for three perennial tallgrass prairie speci...
Saved in:
Published in | Ecology (Durham) Vol. 91; no. 7; pp. 2132 - 2140 |
---|---|
Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
United States
Ecological Society of America
01.07.2010
|
Subjects | |
Online Access | Get more information |
Cover
Loading…
Summary: | The flowering of grasses is a process critical to plant population dynamics and genetics, herbivore performance, and human health. To better understand the climate factors governing grass flowering, we analyzed the patterns of culm production over 25 years for three perennial tallgrass prairie species at Konza Prairie in Kansas, USA. The three species (Andropogon gerardii, Sorghastrum nutans, and Schizachyrium scoparium) all utilize the Câ photosynthetic pathway and were measured annually at the same locations for the past 25 years in an annually burned watershed. Culm production of all three species increased with higher growingâseason soil moisture and precipitation but differed in their responses to water availability at different times during the growing season. Relative to Andropogon, Sorghastrum responded more to precipitation early in the growing season, and Schizachyrium responded more to precipitation late in the growing season. Flowering by each species also revealed a threshold relationship with lateâseason soil moisture at |
---|---|
Bibliography: | http://dx.doi.org/10.1890/09-1242.1 |
ISSN: | 0012-9658 1939-9170 |
DOI: | 10.1890/09-1242.1 |