The Influence of Climate, Soils, Weather, and Land Use on Primary Production and Biomass Seasonality in the US Great Plains

Identifying the conditions and mechanisms that control ecosystem processes, such as net primary production, is a central goal of ecosystem ecology. Ideas have ranged from single limiting-resource theories to colimitation by nutrients and climate, to simulation models with edaphic, climatic, and competitive controls. Although some investigators have begun to consider the influence of land-use practices, especially cropping, few studies have quantified the impact of cropping at large scales relative to other known controls over ecosystem processes. We used a 9-year record of productivity, biomass seasonality, climate, weather, soil conditions, and cropping in the US Great Plains to quantify the controls over spatial and temporal patterns of net primary production and to estimate sensitivity to specific driving variables. We considered climate, soil conditions, and long-term average cropping as controls over spatial patterns, while weather and interannual cropping variations were used as controls over temporal variability. We found that variation in primary production is primarily spatial, whereas variation in seasonality is more evenly split between spatial and temporal components. Our statistical (multiple linear regression) models explained more of the variation in the amount of primary production than in its seasonality, and more of the spatial than the temporal patterns. Our results indicate that although climate is the most important variable for explaining spatial patterns, cropping explains a substantial amount of the residual variability. Soil texture and depth contributed very little to our models of spatial variability. Weather and cropping deviation both made modest contributions to the models of temporal variability. These results suggest that the controls over seasonality and temporal variation are not well understood. Our sensitivity analysis indicates that production is more sensitive to climate than to weather and that it is very sensitive to cropping intensity. In addition to identifying potential gaps in out knowledge, these results provide insight into the probable long- and short-term ecosystem response to changes in climate, weather, and cropping.

[1]  R. Szaniawski.  Adaptation and Functional Balance Between Shoot and Root Activity of Sunflower Plants Grown at Different Root Temperatures , 1983 .

[2]  W. Lauenroth.  Grassland Primary Production: North American Grasslands in Perspective , 1979 .

[3]  I. Washitani,et al.  A Comparative Study of the Germination Characteristics of Seeds from a Moist Tall Grassland Community , 1990 .

[4]  H. Jenny,et al.  Factors of Soil Formation , 1941 .

[5]  R. R. Johnson,et al.  Effect of Water Stress on Carbon Assimilation and Distribution in Soybean Plants at Different Stages of Development 1 , 1977 .

[6]  L. A. Hunt,et al.  Shoot and root dry weight and soil water in wheat, triticale and rye , 1991 .

[7]  David R. Anderson,et al.  Kullback-Leibler information as a basis for strong inference in ecological studies , 2001 .

[8]  J. R. Bray.  ROOT PRODUCTION AND THE ESTIMATION OF NET PRODUCTIVITY , 1963 .

[9]  J. Hicke,et al.  The relative importance of light-use efficiency modifications from environmental conditions and cultivation for estimation of large-scale net primary productivity , 2005 .

[10]  G. Buyanovsky,et al.  Comparative Analyses of Carbon Dynamics in Native and Cultivated Ecosystems. , 1987, Ecology.

[11]  O. Sala,et al.  Grassland Precipitation-Use Efficiency Varies Across a Resource Gradient , 1999, Ecosystems.

[12]  M. C. Crawford,et al.  Root production of a barrel medic (Medicago truncatula) pasture, a barley grass (Hordeum leporinum) pasture, and a faba bean (Vicia faba) crop in southern Australia , 1997 .

[13]  S. Verón,et al.  Environmental Controls of Primary Production in Agricultural Systems of the Argentine Pampas , 2002, Ecosystems.

[14]  M. Rosenzweig.  Net Primary Productivity of Terrestrial Communities: Prediction from Climatological Data , 1968, The American Naturalist.

[15]  Timothy G. F. Kittel,et al.  Regional Analysis of the Central Great Plains , 1991 .

[16]  J. Randerson,et al.  Trends in North American net primary productivity derived from satellite observations, 1982–1998 , 2002 .

[17]  E. Gbur,et al.  Response of soybean growth to root and canopy competition , 1992 .

[18]  C. Potter,et al.  Interannual Variability in Terrestrial Net Primary Production: Exploration of Trends and Controls on Regional to Global Scales , 1999, Ecosystems.

[19]  J. Monteith.  SOLAR RADIATION AND PRODUCTIVITY IN TROPICAL ECOSYSTEMS , 1972 .

[20]  E. L. Anderson.  Tillage and N fertilization effects on maize root growth and root:shoot ratio , 1988, Plant and Soil.

[21]  W. W. Nelson,et al.  Soybean and Corn Rooting in Southwestern Minnesota: II. Root Distributions and Related Water Inflow , 1975 .

[22]  William K. Lauenroth,et al.  REGIONAL AND TEMPORAL VARIATION IN NET PRIMARY PRODUCTION AND NITROGEN MINERALIZATION IN GRASSLANDS , 1997 .

[23]  R. Tausch,et al.  Soil water exploitation after fire: competition between Bromus tectorum (cheatgrass) and two native species , 1990, Oecologia.

[24]  N. French.  Perspectives in Grassland Ecology , 1979, Ecological Studies.

[25]  Land‐use impact on ecosystem functioning in eastern Colorado, USA , 2001 .

[26]  P. Vitousek,et al.  Nutrient dynamics on a precipitation gradient in Hawai'i , 1998, Oecologia.

[27]  H. Lieth.  Modeling the Primary Productivity of the World , 1975 .

[28]  O. Sala,et al.  Long-Term Forage Production of North American Shortgrass Steppe. , 1992, Ecological applications : a publication of the Ecological Society of America.

[29]  I. Noy-Meir,et al.  Desert Ecosystems: Environment and Producers , 1973 .

[30]  I. Burke.  Landscape and Regional Biogeochemistry: Approaches , 2000 .

[31]  Houghton,et al.  The U.S. Carbon budget: contributions from land-Use change , 1999, Science.

[32]  I. Burke,et al.  THE IMPACT OF CROPPING ON PRIMARY PRODUCTION IN THE U.S. GREAT PLAINS , 2005 .

[33]  I. Burke,et al.  Ecological responses of dominant grasses along two climatic gradients in the Great Plains of the United States , 1996 .

[34]  J. Klõšeiko,et al.  BIOMASS, NITROGEN, SULFUR, AND PHOSPHORUS CONTENTS OF BEANS GROWN IN LIMED SOIL IN RESPONSE TO FOLIAR APPLICATION OF HNO3 OR H2SO4 MISTS , 2001 .

[35]  William K. Lauenroth,et al.  Patterns of Production and Precipitation-Use Efficiency of Winter Wheat and Native Grasslands in the Central Great Plains of the United States , 2000, Ecosystems.

[36]  M. A. Bolinder,et al.  Estimating shoot to root ratios and annual carbon inputs in soils for cereal crops , 1997 .

[37]  Climate and Management Contributions to Recent Trends in U.S. Agricultural Yields , 2003 .

[38]  Howard E. Epstein,et al.  EFFECTS OF TEMPERATURE AND SOIL TEXTURE ON ANPP IN THE U.S. GREAT PLAINS , 1997 .

[39]  Osvaldo E. Sala,et al.  PATTERNS AND CONTROLS OF PRIMARY PRODUCTION IN THE PATAGONIAN STEPPE: A REMOTE SENSING APPROACH† , 2002 .

[40]  D. Lobell,et al.  Climate and Management Contributions to Recent Trends in U.S. Agricultural Yields , 2003, Science.

[41]  R. B. Jackson,et al.  Using simple environmental variables to estimate below-ground productivity in grasslands , 2002 .

[42]  J. Monteith.  Climate and the efficiency of crop production in Britain , 1977 .

[43]  H. Tian,et al.  Effect of interannual climate variability on carbon storage in Amazonian ecosystems , 1998, Nature.

[44]  J. Briggs,et al.  Interannual variability in primary production in tallgrass prairie: climate, soil moisture, topographic position, and fire as determinants of aboveground biomass , 1995 .

[45]  William A. Nierenberg,et al.  Encyclopedia of environmental biology , 1995 .

[46]  W. Parton,et al.  Primary Production of the Central Grassland Region of the United States , 1988 .

[47]  G. Porter,et al.  Soil Management and Supplemental Irrigation Effects on Potato: II. Root Growth , 1999 .

[48]  R. Jefferies.  Cultivar responses to water stress in potato: effects of shoot and roots. , 1993, The New phytologist.

[49]  Keith F. Lewin,et al.  Growth and yield of cotton exposed to free‐air CO2 enrichment (Face) , 1992 .

[50]  José M. Paruelo,et al.  LAND USE IMPACTS ON THE NORMALIZED DIFFERENCE VEGETATION INDEX IN TEMPERATE ARGENTINA , 2003 .

[51]  J. L. Dodd,et al.  Phenological Pattern in the Shortgrass Prairie , 1976 .

[52]  Jesslyn F. Brown,et al.  Measuring phenological variability from satellite imagery , 1994 .

[53]  Christian Floret,et al.  Plant phenology in relation to water availability: herbaceous and woody species in the savannas of northern Cameroon , 1995, Journal of Tropical Ecology.

[54]  J. S. Hunter,et al.  Statistics for Experimenters: An Introduction to Design, Data Analysis, and Model Building. , 1979 .

[55]  Myron P. Gutmann,et al.  The Structure and Function of Ecosystems in the Central North American Grassland Region , 1999 .

[56]  R. B. Jackson,et al.  Methods in Ecosystem Science , 2000, Springer New York.

[57]  B. Rathcke,et al.  Phenological Patterns of Terrestrial Plants , 1985 .

[58]  H. Odum,et al.  Primary Productivity of the Biosphere , 1978, Ecological Studies.

[59]  Peter M. Vitousek,et al.  GLOBAL ENVIRONMENTAL CHANGE: An Introduction , 1992 .

[60]  B. McMichael,et al.  Genetic variation for root-shoot relationships among cotton germplasm , 1991 .

[61]  M. Robertson,et al.  Fababean (Vicia faba) in Australia's northern grains belt: canopy development, biomass, and nitrogen accumulation and partitioning , 2002 .

[62]  B. Kimball,et al.  Response of Cotton to Varying COz, Irrigation, and Nitrogen: Yield and Growth , 1993 .

[63]  P. Kulakow,et al.  Seed yield and biomass allocation in Sorghum bicolor and F1 and backcross generations of S. bicolor × S. halepense hybrids , 1994 .

[64]  K. Cassman.  Ecological intensification of cereal production systems: yield potential, soil quality, and precision agriculture. , 1999, Proceedings of the National Academy of Sciences of the United States of America.

[65]  S. Polasky,et al.  Agricultural sustainability and intensive production practices , 2002, Nature.