Downloads, imports, cleans, classifies, enriches and exports biodiversity
    occurrence data, with an emphasis on reproducible Global Biodiversity
    Information Facility (GBIF) <https://api.gbif.org/v1/> workflows. The package
    supports batch occurrence downloads, taxonomic standardisation, coordinate
    cleaning, optional spatial thinning, spatial attribution and structured
    export of processed occurrence records and audit outputs. Terrestrial and
    freshwater workflows can join records to administrative units, protected
    areas, freshwater ecoregions, basins, rivers, lakes, reservoirs, wetlands and
    other contextual spatial overlays. Marine workflows support offshore and
    coastal records through joins to Marine Regions
    <https://www.marineregions.org/> style layers, Exclusive Economic Zone (EEZ)
    units, marine ecoregions, Large Marine Ecosystems and user-supplied marine
    overlays. The package also supports native-range and invasive-status evidence
    workflows using the World Register of Marine Species (WoRMS)
    <https://www.marinespecies.org/>, evidence derived from Standardising and
    Integrating Alien Species (SInAS) <https://zenodo.org/records/18220953>,
    and Global Register of Introduced and Invasive Species (GRIIS)
    <https://griis.org/> style species-country records. These tools are intended
    for biodiversity, macroecological and invasion-biology analyses where
    occurrence records need to be processed consistently, transparently and
    reproducibly.

Functions for calculating biochemical methane potential (BMP) from laboratory measurements and other types of data processing and prediction useful for biogas research. Raw laboratory measurements for diverse methods (volumetric, manometric, gravimetric, gas density) can be processed to calculate BMP. Theoretical maximum BMP or methane or biogas yield can be predicted from various measures of substrate composition. Molar mass and calculated oxygen demand (COD') can be determined from a chemical formula. Measured gas volume can be corrected for water vapor and to standard (or user-defined) temperature and pressure. Gas quantity can be converted between volume, mass, and moles. A function for planning BMP experiments can consider multiple constraints in suggesting substrate or inoculum quantities, and check for problems. Inoculum and substrate mass can be determined for planning BMP experiments. Finally, a set of first-order models can be fit to measured methane production rate or cumulative yield in order to extract estimates of ultimate yield and kinetic constants. See Hafner et al. (2018) <doi:10.1016/j.softx.2018.06.005> for details. OBA is a web application that provides access to some of the package functionality: <https://biotransformers.shinyapps.io/oba1/>. The Standard BMP Methods website documents the calculations in detail: <https://www.dbfz.de/en/BMP>.