A programmatic interface to <http://sp2000.org.cn>, re-written based on an accompanying 'Species 2000' API. Access tables describing catalogue of the Chinese known species of animals, plants, fungi, micro-organisms, and more. This package also supports access to catalogue of life global <http://catalogueoflife.org>, China animal scientific database <http://zoology.especies.cn> and catalogue of life Taiwan <https://taibnet.sinica.edu.tw/home_eng.php>. The development of 'SP2000' package were supported by Biodiversity Survey and Assessment Project of the Ministry of Ecology and Environment, China <2019HJ2096001006>,Yunnan University's "Double First Class" Project <C176240405> and Yunnan University's Research Innovation Fund for Graduate Students <2019227>.

Provides methods for generating, exploring and executing seamless Phase II-III designs of Lai, Lavori and Shih using generalized likelihood ratio statistics. Includes pdf and source files that describe the entire R implementation with the relevant mathematical details.

Miscellaneous functions for analysing species association
        and niche overlap.

Implements the Stratigraphic Plug Alignment (SPA) procedure for
    integrating sparsely sampled plug-based measurements (e.g., total organic
    carbon, porosity, mineralogy) with high-resolution X-ray fluorescence
    (XRF) geochemical data. SPA uses linear interpolation via the base
    approx() function with constrained extrapolation (rule = 1) to preserve
    stratigraphic order and avoid estimation beyond observed depths. The
    method aligns all datasets to a common depth grid, enabling high-resolution
    multivariate analysis and stratigraphic interpretation of core-based
    datasets such as those from the Utica and Point Pleasant formations.
    See R Core Team (2025)
    <https://stat.ethz.ch/R-manual/R-devel/library/stats/html/stats-package.html>
    and Omodolor (2025)
    <http://rave.ohiolink.edu/etdc/view?acc_num=case175262671767524>
    for methodological background and geological context.