Robertson, G. P. and S. K. Hamilton. 2015. Long-term ecological research in agricultural landscapes at the Kellogg Biological Station LTER site: conceptual.

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Presentation transcript:

Robertson, G. P. and S. K. Hamilton Long-term ecological research in agricultural landscapes at the Kellogg Biological Station LTER site: conceptual and experimental framework. Pages 1-32 in S. K. Hamilton, J. E. Doll, and G. P. Robertson, editors. The ecology of agricultural landscapes: long-term research on the path to sustainability. Oxford University Press, New York, New York, USA. Figure 1.1. Location of the Kellogg Biological Station (KBS) in relation to estimates of U.S. net primary productivity. The area outlined in black is the USDA’s North Central Region and includes the U.S. corn belt (Gage et al. 2015, this volume). Base map is modified from Nizeyimana et al. (2001).

Robertson, G. P. and S. K. Hamilton Long-term ecological research in agricultural landscapes at the Kellogg Biological Station LTER site: conceptual and experimental framework. Pages 1-32 in S. K. Hamilton, J. E. Doll, and G. P. Robertson, editors. The ecology of agricultural landscapes: long-term research on the path to sustainability. Oxford University Press, New York, New York, USA. Figure 1.2. Experimental layout for seven systems of the KBS LTER Main Cropping System Experiment (MCSE) at the KBS LTER main site: four annual cropping systems (T1–T4), Alfalfa (T6) and hybrid Poplar (T5) perennial systems, and the Early Successional community (T7). All are replicated as 1-ha plots in six replicated blocks (R1–R6). C-S-W = corn-soybean-winter wheat rotation. Other MCSE systems are located as noted in Figure 1.3. See Table 1.1 and text for management details. Also shown are locations of several ancillary experiments.

Robertson, G. P. and S. K. Hamilton Long-term ecological research in agricultural landscapes at the Kellogg Biological Station LTER site: conceptual and experimental framework. Pages 1-32 in S. K. Hamilton, J. E. Doll, and G. P. Robertson, editors. The ecology of agricultural landscapes: long-term research on the path to sustainability. Oxford University Press, New York, New York, USA. Figure 1.3. Location of mid-successional and forested sites of the KBS LTER Main Cropping System Experiment (MCSE). Included are the Mown Grassland (never tilled) site (T8), and three Coniferous Forest (CF), Mid-successional (SF), and late- successional Deciduous Forest (DF) sites. See Figure 1.2 for LTER main site details and Table 1.1 for further description. Aerial photo background is from August 2011.

Robertson, G. P. and S. K. Hamilton Long-term ecological research in agricultural landscapes at the Kellogg Biological Station LTER site: conceptual and experimental framework. Pages 1-32 in S. K. Hamilton, J. E. Doll, and G. P. Robertson, editors. The ecology of agricultural landscapes: long-term research on the path to sustainability. Oxford University Press, New York, New York, USA. Figure 1.4. Conceptual model currently guiding KBS LTER research. Adapted from Collins et al. (2011).

Robertson, G. P. and S. K. Hamilton Long-term ecological research in agricultural landscapes at the Kellogg Biological Station LTER site: conceptual and experimental framework. Pages 1-32 in S. K. Hamilton, J. E. Doll, and G. P. Robertson, editors. The ecology of agricultural landscapes: long-term research on the path to sustainability. Oxford University Press, New York, New York, USA. Figure 1.5. Main Cropping System Experiment (MCSE) Scale-up fields (n = 27) managed to address questions related to the scalability of results from the MCSE depicted in Figure 1.2. Management corresponds to the MCSE Conventional (T1), Reduced Input (T3), and Biologically Based systems (T4; see Table 1.1). Also shown is the location of the Bioenergy Cropping System Experiment (BCSE). Aerial photo background is from August 2011.

Robertson, G. P. and S. K. Hamilton Long-term ecological research in agricultural landscapes at the Kellogg Biological Station LTER site: conceptual and experimental framework. Pages 1-32 in S. K. Hamilton, J. E. Doll, and G. P. Robertson, editors. The ecology of agricultural landscapes: long-term research on the path to sustainability. Oxford University Press, New York, New York, USA. Figure 1.6. Long-term (1929–2008) trends for temperature and precipitation at KBS: (A) annual means of daily air temperatures showing maximum (upper line), minimum (bottom), and daily (24-hour) values (middle) in °C (means for the 80-year period are given to the left of each data series); (B) total annual precipitation (cm); (C) mean annual Palmer Drought Severity Index (PDSI); and (D) monthly mean air temperature and precipitation at KBS depicted as a Walter-Leith climate diagram. Negative PDSI indicates water deficit conditions for the region. Redrawn from Peters et al. (2013).

Robertson, G. P. and S. K. Hamilton Long-term ecological research in agricultural landscapes at the Kellogg Biological Station LTER site: conceptual and experimental framework. Pages 1-32 in S. K. Hamilton, J. E. Doll, and G. P. Robertson, editors. The ecology of agricultural landscapes: long-term research on the path to sustainability. Oxford University Press, New York, New York, USA. Figure 1.7. Long-term trends in ice duration on Gull Lake at KBS for the periods 1924–2011 and 1955–2011. Ice seasons potentially span two calendar years and therefore the x-axis depicts the year each winter began. From S. Hamilton (unpublished data).

Robertson, G. P. and S. K. Hamilton Long-term ecological research in agricultural landscapes at the Kellogg Biological Station LTER site: conceptual and experimental framework. Pages 1-32 in S. K. Hamilton, J. E. Doll, and G. P. Robertson, editors. The ecology of agricultural landscapes: long-term research on the path to sustainability. Oxford University Press, New York, New York, USA. Figure 1.8. Southwest Michigan counties that comprise the regional setting for KBS LTER (Rudy et al. 2008).

Robertson, G. P. and S. K. Hamilton Long-term ecological research in agricultural landscapes at the Kellogg Biological Station LTER site: conceptual and experimental framework. Pages 1-32 in S. K. Hamilton, J. E. Doll, and G. P. Robertson, editors. The ecology of agricultural landscapes: long-term research on the path to sustainability. Oxford University Press, New York, New York, USA. Figure 1.9. Corn yields in (A) 2008 and (B) 2011 in the KBS LTER Resource Gradient Experiment. For comparison, average U.S. corn yields in 2008 and 2011 (ERS 2013) were 9.7 and 9.2 Mg ha -1, respectively (154 and 147 bu acre -1 ).

Robertson, G. P. and S. K. Hamilton Long-term ecological research in agricultural landscapes at the Kellogg Biological Station LTER site: conceptual and experimental framework. Pages 1-32 in S. K. Hamilton, J. E. Doll, and G. P. Robertson, editors. The ecology of agricultural landscapes: long-term research on the path to sustainability. Oxford University Press, New York, New York, USA. Figure Potential soil carbon sequestration expected on adoption of no-till management in the USDA’s North Central Region. Predicted values are modeled by the SOCRATES soil organic carbon model (Grace et al. 2006).