@article {KNZ00142, title = {Canopy rainfall interception and throughfall in burned and unburned tallgrass prairie}, journal = {The Southwestern Naturalist}, volume = {32}, year = {1987}, pages = {267 -271}, abstract = {

Interception of precipitation by grass canopies in annually burned and unburned tallgrass prairie was measured for individual precipitation events from 1983 to 1984. Seasonal patterns of interception closely reflected differences in grass canopy development throughout the growing season in burned but not unburned prairie. Mean interception for the study period was 38 and 19\% for unburned and burned prairie, respectively, indicating tht througfall volume in burned prairie was approximately 1.3 times that of unburned prairie on an annual basis. Thus, water availability for plant uptake may be initally higher in burned prairie, especially early in the growing season

}, keywords = {LTER-KNZ, tallgrass prairie}, doi = {10.2307/3671570}, author = {Gilliam, F.S. and Seastedt, T.R. and Alan K. Knapp} } @article {KNZ00141, title = {The chemistry of wet deposition for a tallgrass prairie ecosystem: inputs and interactions with plant canopies}, journal = {Biogeochemistry}, volume = {4}, year = {1987}, pages = {203 -217}, abstract = {

The chemistry and nutrient inputs of wet deposition, and the N chemistry of throughfall, were characterized for a tallgrass prairie in north-central Kansas. Dominant ions in wetfall were NH4+, Ca2+, H+, NO3-, and SO2-4; weighted mean pH was 4.79. Principal sources of ions appeared to be natural emissions and wind-blown soils. Concentrations of NO3--N, NH4+-N and organic N in wet deposition were 0.31, 0.30, and 0.17 mg/L, respectively, resulting in N inputs of 2.5, 2.5, and 1.4 kg*ha- 1*yr-1. Comparisons with bulk precipitation suggested that at least 50\% of atmospheric N inputs were from dry deposition. Concentrations of NO3--N, NH4+-N, and organic N in unburned prairie throughfall were 0.27, 0.28, and 1.28 mg/L, and in burned prairie throughfall were 0.33, 0.37, and 0.91 mg/L, respectively. The prairie canopy intercepted up to 48\% of incident precipitation. Lower inorganic N and higher organic N concentrations in throughfall relative to wet deposition probably resulted from leaf uptake of N and immobilization by microbes associated with the standing dead plant materials of the prairie canopy. The removal of these materials by fire is important in maintaining N availability for tallgrass prairie. Much of the N immobilization appeared to have been of N that was supplied to the prairie canopy by dry deposition

}, keywords = {LTER-KNZ, tallgrass prairie}, doi = {10.1007/BF02187366}, author = {Gilliam, F.S.} } @proceedings {KNZ0094, title = {The interaction of biological and hydrologic phenomena that mediate the quality of water draining native prairie on the Konza Prairie Research Natural Area}, journal = {Perspectives on Nonpoint Source Pollution}, year = {1985}, pages = {478 -482}, publisher = {U.S. Enviromental Protection Agency}, address = {Washington DC}, abstract = {

The quality of water from native landscapes in the baseline against which the impact of pollutants on surface water resources must be evaluated. The King\&$\#$39;s Creek watershed has been a U.S. Geological Survey benchmark watershed since 1979. It represents the landscape type tyat gave rise to much of the agricultural midwestern United States. Hydrologic, chemical, and biological measurements have been made by ecologists performing long-term ecological research (LTER) in tallgrass prairie. Streamwater chemistry varies seasonally with the amount and movement of groundwater and soil water, with changes in prairie vegetation, and in response to changes in surface water discharge. Concentrations of organic carbon, organ and inorganic nitrogen, and phosphorus increase during storm flows. The particulate fractions in transport and in storage in the stream bed and on the flood plain vary seasonally with recent hydrologic history and changes in vegetation

}, keywords = {LTER-KNZ, tallgrass prairie}, author = {McArthur, J.V. and Gurtz, M.E. and Tate, C.M. and Gilliam, F.S.} } @article {KNZ0090, title = {Response of Andropogon gerardii (poaceae ) to fire-induced high vs.low irradiance environments in tallgrass prairie: leaf structure and photosynthetic pigments}, journal = {American Journal of Botany}, volume = {72}, year = {1985}, pages = {1668 -1671}, abstract = {

Photosynthetic pigments and several structural characteristics were measured in leaves of Andropogon gerardii from tallgrass prairie populations in an unburned, low-irradiance site and a burned, high-irradiance site to determine if these species displayed sun/shade differences similar to those documented in forest species. Early in the growing season, leaves of A. gerardii in the low-irradiance, unburned site had significantly lower stomatal density, pore length, and conductance, as well as specific leaf mass and thickness than leaves from the high-irradiance, burned site. Moreover, the chlorophnyll a:b ratio, carotenoid content, and bundle sheath-vascular complex area were significantly lower, but chlorophyll content (mass/mass) was greater in leaves in unburned vs burned sites. These differences are consistent with sun/shade adaptations reported for forest understory plants and may contribute to the low productivity of A. gerardii in unburned tallgrass prairie

}, keywords = {LTER-KNZ, tallgrass prairie}, doi = {http://www.jstor.org/stable/2443720}, author = {Alan K. Knapp and Gilliam, F.S.} }