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  1. No Access

    Article

    Interactive Effects of Ungulate Herbivores, Soil Fertility, and Variable Rainfall on Ecosystem Processes in a Semi-arid Savanna

    Large herbivores can both positively and negatively affect primary productivity and rates of nutrient cycling in different ecosystems. Positive effects of grazers in grasslands have been attributed to migrator...

    David J. Augustine, Samuel J. McNaughton in Ecosystems (2006)

  2. No Access

    Article

    Temporal Asynchrony in Soil Nutrient Dynamics and Plant Production in a Semiarid Ecosystem

    A central goal of ecosystem ecology is to understand how the cycling of nutrients and the growth of organisms are linked. Ecologists have repeatedly observed that nutrient mineralization and plant production a...

    David J. Augustine, Samuel J. McNaughton in Ecosystems (2004)

  3. No Access

    Article

    Scale-dependent relationships between the spatial distribution of a limiting resource and plant species diversity in an African grassland ecosystem

    One cornerstone of ecological theory is that nutrient availability limits the number of species that can inhabit a community. However, the relationship between the spatial distribution of limiting nutrients an...

    T. Michael Anderson, Samuel J. McNaughton, Mark E. Ritchie in Oecologia (2004)

  4. No Access

    Chapter

    Herbivory in Terrestrial Ecosystems

    The study of herbivory in relation to ecosystem science has been closely related to the methodological procedures outlined by Darwin in these lines. Ecologists have attempted to quantify herbivory in a variety...

    Martín Oesterheld, Samuel J. McNaughton in Methods in Ecosystem Science (2000)

  5. No Access

    Article

    Biomass and mineral element responses of a Serengeti short-grass species to nitrogen supply and defoliation: compensation requires a critical [N]

    Large mammalian herbivores in grassland ecosystems influence plant growth dynamics in many ways, including the removal of plant biomass and the return of nutrients to the soil. A 10-week growth chamber experi...

    E. William Hamilton III, Michele S. Giovannini, Stephanie A. Moses… in Oecologia (1998)

  6. No Access

    Article

    Elk grazing and vegetation responses following a late season fire in Yellowstone National Park

    We studied responses of aboveground production, grazing by elk and the availability of eight elements (Ca, Fe, K, Mg, N, Na, P, Zn) in a Yellowstone National Park sagebrush grassland following a fire in 1992. ...

    Benjamin F. Tracy, Samuel J. McNaughton in Plant Ecology (1997)

  7. No Access

    Article

    Will increases in atmospheric CO2 affect regrowth following grazing in C4 grasses from tropical grasslands? A test with Sporobolus kentrophyllus

    We grew a C4 grass from the Serengeti ecosystem under ambient (370 ppm) and elevated (700 ppm) CO2, and under clipped and unclipped conditions to test whether regrowth following grazing would be affected by eleva...

    Brian J. Wilsey, Samuel J. McNaughton, James S. Coleman in Oecologia (1994)

  8. No Access

    Article

    Evidence for the promotion of aboveground grassland production by native large herbivores in Yellowstone National Park

    We examined the effect of native large herbivores on aboveground primary production of nonforested habitat in Yellowstone National Park, Wyoming. Productivity of vegetation grazed by elk (Cervus elaphus) and biso...

    Douglas A. Frank, Samuel J. McNaughton in Oecologia (1993)

  9. No Access

    Chapter

    Primary and Secondary Production in Terrestrial Ecosystems

    Ecosystem-level values of net primary productivity and herbivore biomass, consumption, and secondary productivity in terrestrial ecosystems were assembled from the literature. Data on belowground processes and...

    Samuel J. McNaughton, Martin Oesterheld… in Comparative Analyses of Ecosystems (1991)

  10. No Access

    Article

    Ecological conditions that determine when grazing stimulates grass production

    We report the results of a pot experiment that examined the effects of three ecologically important factors controlling plant growth rates in savanna grasslands: defoliation, soil nitrogen and soil water avail...

    Nicholas J. Georgiadis, Roger W. Ruess, Samuel J. McNaughton, David Western in Oecologia (1989)