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  1. Assessing five field sampling methods to monitor Yellowstone National Park's northern ungulate winter range: the advantages and disadvantages of implementing a new sampling protocol

    The five field sampling methods tested for this study differed in richness and Simpson's Index values calculated from the raw data. How much the methods differed, and which ones were most similar to each other, depended on which diversity measure and which type of data were used for comparisons. When the number of species (richness) was used as a measure of...

    Author(s):
    Pamela G. Sikkink; Roy Renkin; Geneva Chong; Art Sikkink
    Year:
    2013
    Keywords:
    sampling methods, Yellowstone National Park, Simpson's Index
    Source:
    Final Report: Assessing Sampling Methods YNP 2013. 41 p.

  2. Sierra Nevada meadows: species alpha diversity

    Plant species diversity refers to variety and abundance; it does not necessarily relate to meadow health but may provide information important in an ecosystem context. Monitoring to detect change in diversity usually begins with estimating alpha (within) diversity of plant communities. Because few such estimates exist for meadow site classes or specific sites of the...

    Author(s):
    Raymond D. Ratliff
    Year:
    1993
    Keywords:
    Relative index, Margalef's index, Simpson's index, jack-knife estimates, plant species, frequency
    Source:
    Res. Note PSW-RN-415. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 5 p

  3. Herb layer diversity and phytoindicative evaluation of habitat conditions of forest permanent plots in Poland

    The influence of climatic and pollution gradients was determined on species richness, species diversity, and values of phytoindicators of the herb layer in pine and mixed pine forest communities in Poland. Geographical longitude was used as a synthetic measure of geographical position. Ellenberg's indices were used as synthetic measures of habitat differentiation...

    Author(s):
    Ewa Roo-Zielinska; Jerzy Solon
    Year:
    1998
    Keywords:
    Source:
    In: Bytnerowicz, Andrzej; Arbaugh, Michael J.; Schilling, Susan L., tech. coords. Proceedings of the international symposium on air pollution and climate change effects on forest ecosystems. Gen. Tech. Rep. PSW-GTR-166. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: 161-168
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