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This list describes a number of operations and models that may be potentially useful to represent as actors and workflows (analytical models) within Kepler. When possible each such "component" includes a brief description and potential impact (e.g., for semantic mediation) as well as one or more citations for the component (e.g., where we spotted the component and definitive papers on the component).
- Species Density Estimates (D)
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- Citation: This set of operations was discussed in the paper (Gross et al. 1999).
- Description: They define D as the measured or estimated number of species per m^2. And give a number of methods for estimating D from data sets. Each method is accompanied by a citation. The methods are:
- Percent cover from smaller plots (Inouye et al. 1987, Inouye 1998)
- ANPP (annual primary productivity) harvested plots (Huberty et al. 1998)
- ANPP harvested plots, combined for a transect estimate of D (Milchunas et al. 1990, Inouye 1998)
- Percent cover adjacent to ANPP plots, interopolated for a per m^2 transect estimate of D (Briggs and Knapp 1995)
- Censused in m^2 plots containing smaller quadrats used for ANPP estimates (Shaver 1986, Chapin et al. 1995)
- Species presence censused at 200 points in each m^2 plot sampled for ANPP (Walker et al. 1994)
- Application: As a set of operations to be included in a library for integration.
- (Briggs and Knapp 1995) J. Briggs and K. Knapp. Interannual variability in primary productivity in tallgrass prairie: climate, soil moisture, topographic position, and fire as determinants of aboveground biomass. Am. J. Bot. 82:1024-1030, 1995.
- (Chapin et al. 1995) F. Chapin III, R. Shaver, A. Giblin, et al. Responses of artic tundra to experimental and observed changes in climate. Ecology 76:694-711, 1995.
- (Gross et al. 1999) K. Gross, M. Willig, L. Gough, R. Inouye, S. Cox. et al. Patterns of species density and productivity at different spatial scales in herbaceous plant communities. OIKOS 89:417-427, 2000.
- (Huberty et al. 1998) L. Huberty, K. Gross, and C. Miller. Effects of nitrogen addition on successional dynamics and diversity in Michigan old-fields. J. Ecol. 86:794-803, 1998.
- (Inouye et al. 1987) R. Inouye, N. Huntley, D. Tilman, et al. Old-field succession on a Minnesota sandplain. Ecology 68:12-26, 1987.
- (Inouye 1998) R. Inouye. Species-area curves and estimates of total species richness in an old-field chronosequence. Plan Ecol. 37:31-40, 1998.
- (Milchunas et al. 1990) D. Milchunas, W. Laurenroth, P. Chapman, and M. Kazempour. Community attributes along a perturbation gradient in a shortgrass steppe. J. Veg. Sci. 1:375-384, 1990.
- (Shaver 1986) G. Shaver. Woody stem productions in Alaskan tundra shrubs. Ecology 67:660-669, 1986.
- (Walker et al. 1994) M. Walker, J. Webber, E. Arnold, and D. Ebert-May. Effects of interannual climate variation on above-ground phytomass in alpine vegetation. Ecology 75:393-408.
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