Progress 07/01/00 to 06/30/06
Outputs
OUTPUTS: My research efforts are very active and they coincide with the many aspects of my teaching. During the last 8 years, I have received $908,281 in grant funding from several federal, state and private sources. This is a 182% increase over the previous 7 years. During that time I published 21 peer reviewed articles and 14 non-peer reviewed articles or 4.375 articles per year. I am interested in the tools used to describe and analyze forests. These tools can be landscape-scale, stand-scale or tree-scale. I have aspects of my research at all three of these levels. My research is driven by a set of ideas in which vegetation structure is the aspect of forests that humans can change. These changes have consequences at all three levels of scale. Most vegetation structure is controlled by the amount and arrangement of leaves in tree crowns and canopies. Many of the other features of a forest are directly influenced by the amount and arrangement of tree crowns and canopies. Given these assumptions I have spent my time learning and analyzing the effect of vegetation structure on the dimension of the tree itself and the vegetation structure produced by a collection of trees. Additionally, I am very interested in the consequences of vegetation structure change on other components of a forest than just the woody stems. Examples include the vegetation structures effect on the mast crop of mast trees species, on cavity abundance, understory herbaceous plant abundance, salamander abundance, course woody debris abundance, and stem rot fungus abundance. To better understand these relationships, I use models of the various components and how they interact. Having been frustrated with the limits of traditional human tree measurements, I have started exploring new of methods of measuring trees with the use of digital photography to measure non-traditional aspects of tree dimensions. There are many interesting possibilities, I have published on a few of these and believe there are many more to come. PARTICIPANTS: Nothing significant to report during this reporting period. TARGET AUDIENCES: Not relevant to this project. PROJECT MODIFICATIONS: 1.Cross discipline synthesis of multiple resources. Several projects are possible, including an analysis of soil microsite interactions with both herbaceous and dominant woody vegetation. I also plan to extend my previous work in describing stand structure in three-dimensions, and the role of three dimensional structure of vegetation on animal habitat selection and use. 2.Construction of software management tools for interdisciplinary natural resource management. This initiative builds on the previous work in developing a silvicultural database system, stand visualization system, and adaptive stand structure models. These tools include both computer programs and statistical techniques that can be applied to practical problems in natural resource management. 3.Creating state-of-the-art teaching environments for interdisciplinary natural resource management. This research involves the development of adaptive management techniques for natural resources, incorporating continuous quality improvement (CQI) methods and the development of effective training methods for field managers. Additionally, I anticipate a project to develop methodology for assessing the success of our school in training competent, functioning professionals in natural resource disciplines. This work could lead to papers in the field of educational assessment as well as in resource management journals. 4.Construct landscape scale models of forest structure change. These models provide the information to analyze the probable outcomes under a specified forest management policy. These models follow explicit rules of structure change at differing probabilities. 5.Develop a number of photogrammetric methods to measure trees. The methods include images sampled from the ground and from aerial platforms. All the methods are best suited to very high resolution digital photography. This initiative has the potential of adding several new aspects to forest structure measurement.
Impacts
My research interests include the quantitative relationships of vegetation structure in a forest (e.g., size, composition, spatial, and age distributions, density and history) at multiple scales, the relationships of vegetation structure to other resource components (e.g., salamanders, birds, mammals, arthropods, fungi, soil and geologic parent material for example), as well as methodologies (e.g. software and statistical tools) to organize and analyze these relationships. While diverse, my research focuses on using quantitative analytical tools to describe and predict the probable relationships among components of forest vegetation structure and other natural resources. The aim of these analyses is to produce tools that help forest managers make decisions. My approach to this interdisciplinary problem is through collaborations with other researchers, bringing my expertise in quantitative analysis of vegetation dynamics. My research efforts include a number of large long-term projects, which focus on acquiring the data necessary to enable the modeling of vegetation structure at many scales. These large-scale research initiatives include projects such as the Missouri Ozark Forest Ecosystem Project (MOFEP), Ecosystem Management Research: Assessing Impacts of Disturbance in Central Hardwood Ecosystems project of the USDA Forest Service, North Central Forest Experiment Station and the IFAFS project Sustaining Private Forestry. In addition, I have access to some of the largest collections of long term, repeat measurement forest inventory plots anywhere in the United States. These datasets include in addition to the data collected on the above studies, a 60-year record at Pioneer Forest, which is managed in an uneven-aged silvicultural system, a 50-year record at University forest, which had 30 years of little or no management then a mix of management styles and a 40-year record on oak stocking, a classic even-aged silvicultural system established on US Forest Service lands. Also I have had excellent collaboration with the USFS Forest Inventory and Analysis units around the country. These projects allow detailed testing of previously developed models that have been used on the West Coast and the Midwest of the United States and in Europe. These projects also provide me many opportunities to form interdisciplinary collaborations.
Publications
- He, H. S., Z. Hao, D. R. Larsen, L. Dai, and Y. M Hu. 2002. A case study of landscape scale forest sucession in Northern China. Ecological Modelling 156(2-3):153-166.
- Shifley, S. R., F. R. Thompson III, D. R. Larsen, and W. D. Dijak. 2000. Modeling forest landscape change in the Missouri Ozarks under alternative management practices Computers and Electronics in Agriculture 27:7-24.
- Ko, D. W., H. S. He, and D. R. Larsen. 2006 Simulating forest land ownership fragmentation in the Missouri Ozarks, USA. Landscape Ecology 21:671-686.
- Treiman T., J. Dwyer, and D. Larsen. 2005. Long-term economic simulation: Even-aged and uneven-aged examples from the Missouri Ozark Forest Ecosystem Project (MOFEP). Northern Journal of Applied Forestry. 22(1):42-47.
- Fan, Z., S. R. Shifley, M. A. Spetich, F. R. Thompson, and D. R. Larsen. 2005. Abundance and size distribution of cavity trees in second-growth and old-growth Central Hardwood Forests. Northern Journal of Applied Forestry 22(3):162-169.
- Xu, C., H. S. He, Y. Hu, Y. Chang, D. R. Larsen, X. Li, and R. Bu. 2004. Assessing the effects of cell-level uncertainity on forest landscape model simulations in northeastern China. Landscape Ecology 180(1):57-72.
- Fan, Z., S. S. Lee, S. R. Shifley, F. R. Thompson and D. R. Larsen. 2004. Simulating the effects of landscape size and age structure on cavity tree density using resampling technique. Forest Science 50(5): 603-609.
- Larsen, D. R. and P. L. Speckman 2004. Multivariate regression trees for analysis of abundance data. Biometrics 60:543-549.
- Fan, Z., S. R. Shifley, F. R. Thompson, and D. R. Larsen. 2004. Simulated cavity tree dynamics under alternative timber harvest regimes. Forest Ecology and Management 193:399-412.
- Colbert, K. C., D. R. Larsen, and J. R. Lootens. 2002. Height-diameter equations for thirteen Midwestern bottomland hardwood species. Northern Journal of Applied Forestry. 19(4):171-176.
- Larsen, D. R. 2002. Spreadsheet stocking diagrams for Central Hardwoods. Northern Journal of Applied Forestry. 19(2):93-94.
- Moser, W. K., S. M. Jackson, V. Podrazsky, and D. R. Larsen. 2002. Examination of stand structure on quail plantations in the Red Hills region of Georgia and Florida managed by the Stoddard-Neal system: an example for forest managers. Forestry 75(4):443-449. He, H. S., D. R. Larsen, and D. J. Mladenoff. 2002. Exploring component based approaches in forest landscape modeling. Environmental Modeling and Software 17(6):519-529.
- Fan, Z., S. R. Shifley, M. A. Spetich, F. R. Thompson, and D. R. Larsen. 2003. Distribution of cavity trees in Midwestern old-growth forests. Canadian Journal of Forest Research 33(8):1481-1494.
- Peck J. E., J. Grabner, D. Ladd, and D. R. Larsen.. 2004. Microhabitat affinities of Missouri Ozarks lichens. Bryologist. 107(1):47-61.
- Hooten, M. B., D. R. Larsen, and C. K. Wikle. 2003. Predicting the spatial distribution of ground flora on large domains using a hierarchical Bayesian model. Landscape Ecology 18:487-502.
- Fan, Z., D. R. Larsen, S. R. Shifley and F. R. Thompson. 2003. Estimating cavity tree abundance by stand age and basal area, Missouri, USA. Forest Ecology and Management 179:231-242.
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Progress 01/01/05 to 12/31/05
Outputs
Projects in all four areas continue: Landscape modeling continues with the prediction of mortality and other attributes of the forested landscape are now the focus of this research. At the stand level, the work on the Sylvan forest structure model continues and is be continued to southern bottomland hardwoods. Lots of new component are being developed for the Sylvan model and are in the preliminary testing phase. I also have been developing close range remote sensing techniques of tree stem taper this work continues with technique development. This work has extended to the investigating the scale effects of rasterized data and the methods of acquiring that data.
Impacts
The work is designed to help field managers analyze complex relationship among parts of the forest, make conclusions, and make management decisions. It is design the improve the accuracy and ease of measuring forests.
Publications
- Zhaofei Fan, Stephen R. Shifley, Martin A. Spetich, Frank R. Thompson III, and David R. Larsen. 2005. Abundance and size distribution of cavity trees in second-growth and old-growth Central Hardwood Forests. Northern Journal Of Applied Forestry 22(3)162-169.
- Treiman, T., J. P. Dwyer, and D. R. Larsen. 2005. Long-term growth and harvest simulation: Even-aged, and uneven-aged examples from the Missouri Ozark Forest Ecosystem Project (MOFEP). Northern Journal of Applied Forestry 22(1)42-47.
- Peak, J. E., J. Grabner, D. Ladd and D. R. Larsen. 2004. Microhabitat affinities of Missouri Ozark lichens. Bryologist 107(1)47-61.
- Larsen, D. R. 2005. Use of very high resolution digital oblique photography in the development of 3-dimensional models for tree measurements: Examples from ground based and aerial based platforms. Proceedings of the 20th Biennial Workshop on Color Photography, Videography and Airborne Imaging for Resource Assessment. American Society of Photogrammetry and Remote Sensing. Proceedings CD
- Larsen, D. R. 2005. Development of a photographic method of measuring tree taper outside bark. 13th Biennial Southern Silviculture Conference. SRS GTR (in Press)
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Progress 01/01/04 to 12/31/04
Outputs
Projects in all four areas continue: Landscape modeling continues with the prediction of mortality and other attributes of the forested landscape are now the focus of this research. At the stand level, the work on the Sylvan forest structure model continues and is be continued to southern bottomland hardwoods. I also have been developing close range remote sensing techniques of tree stem taper. This work has extended to the investigating the scale effects of rasterized data and the methods of acquiring that data.
Impacts
The work is designed to help field managers analyze complex relationship among parts of the forest, make conclusions, and make management decisions. It is design the improve the accuracy and ease of measuring forests.
Publications
- Xu, C., H. S. He, Y. Hu, Y. Chang, D. R. Larsen, X. Li, and R. Bu. 2004. Assessing the effects of cell-level uncertainity on forest landscape model simulations in northeastern China. Landsacpe Ecology 180(1):57-72.
- Fan, Z., S. S. Lee, S. R. Shifley, F. R. Thompson and D. R. Larsen. 2004. Simulating the effects of landscape size and age structure on cavity tree density using resampling technique. Forest Science 50(5):
- Larsen, D. R. and P. L. Speckman 2004. Multivariate regression trees for analysis of abundance data. Biometrics 60:543-549
- Fan, Z., S. R. Shifley, F. R. Thompson and D. R. Larsen. 2004. Simulated cavity tree dynamics under alternative timber havest regimes. Forest Ecology and Management 193 (2004) 399-412.
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Progress 01/01/03 to 12/31/03
Outputs
Projects in all four areas continue: Landscape modeling continues with the prediction of snag abundance at various scales, tree, stand, and landscape. As well as Bayesian Hierarchical Modeling of plant abundance. At the stand level the work on the Sylvan forest structure model continues and is be continued to southern bottomland hardwoods. The work on stocking concepts also continues. I also have been developing close range remote sensing techniques of tree stem taper.
Impacts
The work is designed to help field managers analyze complex relationship among parts of the forest, make conclusions, and make management decisions. It is design the improve the accuracy and ease of measuring forests.
Publications
- Fan, Z., D. R. Larsen, S. R. Shifley and F. R. Thompson. 2003. Estimating cavity tree abundance by stand age and basal area, Missouri, USA. Forest Ecology and Management 179(2003):231-242.
- Fan, Z., S. R. Shifley, M. A. Spetich, F. R. Thompson, D. R. Larsen. 2003. Distribution of cavity trees in Midwestern Old-Growth Forests. Canadian Journal of Forest Research 33(8):1481-1494.
- Hooten, M. B., D. R. Larsen and C. K. Wikle. 2003. Predicting the spatial distribution of ground flora on large domains using a hierarchical Bayesian model. Landscape Ecology 18:487-502.
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Progress 01/01/02 to 12/31/02
Outputs
Projects in all four areas continue: Landscape modeling continues with the prediction of snag abundance at various scales, tree, stand, and landscape. Also the landscape modeling working in Northeast China continues. At the stand level the work on the Sylvan forest structure model continues and is be continued to southern bottomland hardwoods. The work on stocking concepts also continues.
Impacts
The work is designed to help field managers analyze complex relationship among parts of the forest, make conclusions, and make management decisions.
Publications
- Colbert, K. C., D. R. Larsen, and J. R. Lootens. 2002. Height-diameter equations for thirteen Midwestern bottomland hardwood species. Northern Journal of Applied Forestry 19(4):171-176
- He, H. S., D. R. Larsen, and D, J, Mladenoff. 2002. Exploring component based approaches in forest landscape modeling. Environmental Modeling and Software. 17(6):519-529.
- He, H. S., Z. Hao, D. R. Larsen, L. Dai, and Y. M Hu. Y. Chang 2001. A simulation study of landscape scale forest succession in Northeastern China. Ecological Modeling 156(2002) 153-166
- Larsen, D. R. 2002. Spreadsheet stocking diagrams for Central Hardwoods. Northern Journal of Applied Forestry 19(2)93-94.
- Moser, W. K., S. M. Jackson, V. Podrazsky, and D. R. Larsen. 2002. Examination of stand structure on quail plantations in the Red Hills region of Georgia and Florida managed by the Stoddard-Neel system: an example for forest managers Forestry 75(4)443-449
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Progress 01/01/01 to 12/31/01
Outputs
Projects in all four areas continue: landscape models have been calibrated for the Missouri Ozarks. Landscape projects include parameterization of LANDIS for Indiana and modeling landscape in Northeast China. Stand level modeling continues through a rewrite of the Sylvan forest structure model as well as tree allometric equations and mortality equations. Additionally work of the use and relationship of stand stocking concepts. Graduate Students=1
Impacts
This work helps to describe and predict the complex interactions of forest and the organisms that live in forests
Publications
- Thompson, F. R., III, S. K. Robinson, T. M. Donovan, J. Faaborg, D. R. Whitehead and D. R. Larsen. 2000. Biogeographic, landscape, and local factors affecting cowbird abundance and host parasitism levels. In: Ecology and management of cowbirds ( T. Cook, S. K. Robinson, S. I. Rothstien, S. G. Sealy and J. N. Smith, eds.). University of Texas Press, Austin TX.
- de Liocourt, F. 1898. De l'amenagement des sapin`eres. Bulletin trimestriel, Socie'te' foresti`ere de Franche-Comt`et Belfort, Julliet 1898 pp 396-409. Translated to English Nygren, M., P. Nygren, and D. R. Larsen. 2001. On the amelioration of fir forests. http://www.snr.Missouri.edu/Silviculture/online/deLiocout.pdf
- Guyette, R. and D. Larsen. 2000. A history of anthropogenic and natural disturbances in the area of the Missouri Ozark Forest Ecosystem Project. In: Missouri Ozark Forest Ecosystem Project: site history, soils, landforms, woody and herbaceous vegetation, down wood and inventory methods for the landscape experiment. S. Shifley and B. Brookshire eds. USDA Forest Service, North Central Research Station. General Technical Report. NC-208 314 p 19-40.
- Shifley, S. R., F. R. Thompson III, D. R. Larsen, D. J. Mladenoff and E. J. Gustafson. 2000. Utilizing inventory to calibrate a landscape simulation model. In: Integrating tools for natural resource inventories in the 21st century, proceedings of IUFRO conference. M. Hansen and T. Burk eds. USDA Forest Service, North Central Research Station. General Technical Report NC-212. p 549-561.
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Progress 01/02/00 to 12/31/00
Outputs
The development of the forest stand structure model continues with about one half the code written to complete a working stand structure model. This model is based on previous work and so the basic structure exists but many improvements and extensions of the original concepts are included. This model is being developed in C++ with a graphical interface that will compile on Unix and Windows operating systems. A stand structure class model is being developed to convey forest structure change and likely impacts of silvicultural treatment to private forest landowners. This work is in the beginning stages. On the objective of developing a landscape forest structure model some elements have been developed. LANDIS a landscape disturbance and succession model develop by David Mladenoff and Hong He in Wisconsin has been calibrated to the Missouri Ozarks and we are in the process of calibrating it for Indiana. One of my PhD students developed a landscape oak mast model to work
with the output of LANDIS. I also am working with another student developing landscape scale presents and abundance models for various legumes in the Missouri Forests. This approach models both physical and spatial components of the observed data set. Graduate Students = 6.
Impacts
This work will improve the silviculturist ability to develop and hypothesize likely outcomes both at the stand and landscape levels. The models help researchers integrate complex interactions at difference scales.
Publications
- Shifley, S. R., L. M. Roovers, R. G. Jensen and D. R. Larsen. 2000. Composition and structure of woody forest vegetation in the Missouri Ozark Forest Ecosystem Project. In: Missouri Ozark Forest Ecosystem Project: site, history, soils, landform, woody and herbaceous vegetation, down wood and inventory methods for the landscape experiment. S. Shifley and B. Brookshire eds. USDA Forest Service, North Central Research Station. General Technical Report NC-208 pp. 71-106.
- Shifley, S. R., F. R. Thompson, III, D. R. Larsen, and W. D. Dijak. 2000. Modeling forest landscape change in the Missouri Ozarks under alternative management practices. Computers and Electornics in Agriculture 27(2000):7-24
- Guyette, R. and D. R. Larsen. 2000. A history of anthropogenic and natural disturbance in the area of the Missouri Ozark Forest Ecosystem Project. In: Missouri Ozark Forest Ecosystem Project: site, history, soils, landform, woody and herbaceous vegetation, down wood and inventory methods for the landscape experiment. S. Shifley and B. Brookshire eds. USDA Forest Service, North Central Research Station. General Technical Report NC-208 pp. 19-40.
- Shifley, S. R., F. R. Thompson, III, D. R. Larsen, D. J. Mladenoff, and E. Gustafson. 2000. Utlizing inventory to calibrate a landscape simulation model. In: Integrating tools for natural resource inventories in the 21st century, proceeding of IUFRO conference. M. Hansen and T. Burk eds. USDA Forest Service,North Central Research Station, General Technical Report NC-212 pp 549-561
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Progress 01/01/99 to 12/31/99
Outputs
Projects in all four areas continue: landscape models have been calibrated for the Missouri Ozarks. Now ancillary models are being produced to predict other landscape features such as mast production. Stand level modeling continues through a rewrite of the Sylvan forest structure model as well as tree allometric equations and mortality equations. Additionally new work is being implemented as demonstration of remote sensing use in natural resources management. Graduate Students=5
Impacts
This work describes and predicts the complex interactions of forest and the organisms that live in forests.
Publications
- Young, F. J., R. D. Hammer and D. R. Larsen. 1999. Frequency distributions of soil properties on a loess-mantled Missouri watershed. Soil Science Society of America Journal. (63(1)178-185.
- Larsen, D. R., E. F. Lowenstein, and P. S. Johnson. 1999. Sustaining recruitment of oak reproduction in Uneven-aged stands in the Ozark Highlands. USDA Forest Service, North Central Research Station. St. Paul, MN. General Technical Report, NC-203 11p.
- Larsen, D. R. 1999. Girard form class trends from the Missouri Ozark Forest Ecosystem Project. Missouri Department of Conservation, Jefferson City, MO Notes for Forest Managers, Report #4 4p.
- Shifley, S. R., D. R. Larsen, F. R. Thompson III, D. J. Mladenoff, E. J. Gustafson. 1999. Utilizing inventory information to calibrate a landscape simulation model. USDA Forest Service, Rocky Mountain Research Station, GTR RM-?? (in Press)
- Herbeck, L. A. and D. R. Larsen. 1999. Plethodontid salamander response to silvicultural practices in Missouri Ozark forests. Conservation Biology (13(3)623-632.
- Lootens, J. R., D. R. Larsen, and E. F. Lowenstein. 1999. A matrix transition models for Uneven-aged, oak-hickory forest in the Missouri Ozark Highlands. In: Proceedings of the Tenth Biennial Southern Silviculture Research Conference. J. A. Haywood, Editor, USDA, Forest Service, Southern Research Station, General Technical Report, SRS-30. pp536-538.
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Progress 01/01/98 to 12/31/98
Outputs
Projects in all four areas continue: Landscape management models have been calibrated and are currently being tested on larger study areas than those used in the model development. Stand level work continues on both the long-term Missouri Ozark Forest Ecosystem Project and on several long-term repeat measurement inventories. Work also continues in the stand structure and allometry of riparian forests. Additional work was done on modeling the bud demography of oak trees. These studies demonstrate the cross scale focus of the original proposal. Currently projects are underway to integrate these diverse scale levels. Graduate Students = 4
Impacts
(N/A)
Publications
- Larsen, D. R. and L. C. Bliss. 1998. Analysis of the structure of tree seedling populations on a Lahar. Landscape Ecology 13:307-322.
- Cecich, R. and D. R. Larsen. 1998. Bud Demography and Bifracation in Quercus alba L. and Quercus velutina Larn. In: Diversity and Adaptation in Oak Species. Proceedings of IUFRO Working Party 2.08.05 (K. C. Steiner ed.) College of Agricultural Sciences, The Pennsylvania State University, University Park, Pennsylvania, USA 297 pp.
- Shifley, S. R., F. R. Thompson, III, D. R. Larsen and D. J. Mladenoff. 1997. Modeling forest landscape change in the Ozarks: Guiding principles and preliminary implementation. In: 11th Central Hardwoods Conference. (S. Pallardy, R. Cecich and P. S. Johnson, eds.) USDA Forest Service GTR NC-188, pp. 231-241.
- Larsen, D. R. and R. Cecich. 1997. Model of white oak flower survival and maturation. In: 11th Central Hardwoods Conference. (S. Pallardy, R. Cecich and P. S. Johnson, eds.) USDA Forest Service GTR NC-188, pp. 262-268.
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Progress 01/01/97 to 12/31/97
Outputs
Projects in four areas are underway and in the analysis stage: Landscape management models looking at pattern development of forest mosaics under alternative management objectives, Vegetation analysis of a ecosystem management research project in Ozark Upland Oak-hickory forests in Missouri, Vegetation analysis of riparian forests in Northern Missouri, 1993 Flood effects on riparian forests a long the big rivers in Iowa, Illinois and Missouri. In all these projects, questions of scale form the major link. Graduate Students = 3.
Impacts
(N/A)
Publications
- Larsen, D. R., S. R. Shifley, F. R. Thompson III, B. L. Brookshire, D.C. Dey and E. Kurzejeski, and K. England. 1997. Ten Guidelines forecosystem researchers: Lessons from Missouri. Journal of
- Larsen, D. R., M. A. Metzger and P. S. Johnson. 1997. Oak regeneration and overstory density in the Missouri Ozarks. Canadian Journal of Forest Research. Canadian Journal of Forest Research
- Larsen, D. R. and P. S. Johnson. 1997. Linking the ecology of natural oak regeneration to silviculture. Forest Ecology and Management.
- Shifley, S. R., B. L. Brookshire, D. R. Larsen and L. A. Herbeck. 1997. Snags and down wood in Missouri old-growth and mature second-growth forests. Northern Journal of Applied Forestry.
- Dwyer, J. P., D. Wallace and D. R. Larsen. 1997. Implications of woody river corridors in levee protection along the Missouri River. Journal of the Amreican Water Resources Association 33(2):481-489.
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Progress 01/01/96 to 12/30/96
Outputs
Projects in four areas are underway: Landscape management models looking at pattern development of forest mosaics under alternative management objectives, Vegetation analysis of a ecosystem management research project in Ozark Upland Oak-hickory forests in Missouri,Vegetation analysis of riparian forests in Northern Missouri, 1993 Flood effects on riparian forests a long the big rivers in Iowa, Illinois and Missouri. In all these projects, questions of scale form the major link. Graduate Students = 4.
Impacts
(N/A)
Publications
- Larsen, D. R. and M. A. Metzger and P. S. Johnson. 1997. Oak regeneration and overstory density in the Missouri Ozarks. Canadian Journal of Forest Research. (In Press).
- Larsen, D. R. and P. S. Johnson. 1997. Linking the ecology of natural oak regeneration to silviculture. Forest Ecology and Management. (In Press).
- Young, F. J. and R. D. Hammer and D. R. Larsen. 1996. Frequency distributions of soil properties on a loess-mantled Missouri watershed. Soil Science Society of America Journal. (In Press).
- Shifley, S. R. and B. L. Brookshire and D. R. Larsen and L. A. Herbeck. 1996. Snags and down wood in Missouri old-growth and mature second-growth forests. Northern Journal of Applied Forestry. (In Press).
- Thompson, F. R., III et al. 1996. Biogeographic, landscape, and local factors affecting cowbird abundance and host parasitism levels. In: Ecology and management of cowbirds. Univ. of Texas Press, Austin TX. (In Press).
- Dwyer, J. P., D. Wallace and D. R. Larsen 1996. Implications of woody river corridors in levee protection along the Missouri River. Water Resources Bulletin(in Press).
- Kabrick, J. M., D. R. Larsen and R. D. Hammer. 1996. Soils and Landform mircosites in North Missouri riparian forests. Riparian Reviews Vol. 1, No. 2 (Summer issue).
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Progress 01/01/95 to 12/30/95
Outputs
Project in four topic area are underway: Landscape modeling, calibrating a landscape model to the Missouri Ozarks; Vegetation analysis of a large herbaceous dataset from the Missouri Ozark Forest Ecosystem Project; Vegetaion analysis of riparian forests along the Missouri and Mississippi Rivers and their tributaries; and Models of the process of acorn production starting from the flower crop. Within these project many scale question occur requiring interesting solutions. Graduate Students = 3.
Impacts
(N/A)
Publications
- Larsen, D. R. 1996. Influence of Canopy structure assumptions on predictions from Beer's Law: A comparison of deterministic and stochastic simulations. Agricultural and Forest Meteorology. (In press).
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Progress 01/01/94 to 12/30/94
Outputs
Projects have been started in the following four topic areas; Landscape management models looking at pattern development of forest mosaics under alternative management objective and mixed ownerships, Vegetation analysis of a ecosystem management research project in Ozark Upland Oak-hickory forests in Missouri, Vegetation analysis of riparian forests in Northern Missouri, 1993 Flood effects on riparian forests a long the big rivers in Iowa, Illinois and Missouri, and the distribution of oak-flowers with stand grown tree crowns. In these projects, many scale questions are the major component of interest. Graduate Students = 2.
Impacts
(N/A)
Publications
- LARSEN D. R. 1994. Adaptable stand dynamics model integrating site-specific growth for innovative silvicultural prescriptions. For. Ecol. Mgt. 69:245-257.
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