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Nordic Microalgae

Nordic Microalgae is an online platform providing high-quality images, illustrations, and detailed information about aquatic microalgae and related organisms in the Nordic region, including phytoplankton, microzooplankton, and benthic microalgae. It features a comprehensive species checklist, up-to-date taxonomic data linked to WoRMS and AlgaeBase, and supplementary resources such as biovolume lists and occurrence maps. Established in 1996 and supported by long-term funding from the Swedish Research Council through the Swedish Biodiversity Data Infrastructure (SBDI).

All data on Nordic Microalgae is accessible through our API. Below are examples demonstrating how to extract data using the SHARK4R package.

Getting Started

Installation

You can install the package from GitHub using the devtools package:

# install.packages("devtools")
devtools::install_github("sharksmhi/SHARK4R",
                         dependencies = TRUE)

Load the SHARK4R and tibble libraries:

Retrieve Complete Nordic Microalgae Taxon Table

A complete Nordic Microalgae taxa list can be retrieved through the API.

# Get taxa information
taxa <- get_nua_taxa(unparsed = FALSE)

# Print data
tibble(taxa)
## # A tibble: 6,851 × 5
##    scientific_name           authority                       rank  slug  nua_url
##    <chr>                     <chr>                           <chr> <chr> <chr>  
##  1 Abollifer                 Vørs, 1992                      Genus abol… https:…
##  2 Abollifer prolabens       Vørs, 1992                      Spec… abol… https:…
##  3 Acanthoceras              Honigm., 1910                   Genus acan… https:…
##  4 Acanthoceras zachariasii  (Brun) Simonsen, 1979           Spec… acan… https:…
##  5 Acanthocerataceae         Round, Crawford & Mann, 1990    Fami… acan… https:…
##  6 Acanthocorbis             S.Hara & E.Takahashi, 1984      Genus acan… https:…
##  7 Acanthocorbis apoda       (Leadbeater) Hara & Takahashi,… Spec… acan… https:…
##  8 Acanthocorbis asymmetrica (Thomsen) Hara & Takahashi, 19… Spec… acan… https:…
##  9 Acanthocorbis campanula   (Espeland) Thomsen, 1991        Spec… acan… https:…
## 10 Acanthocorbis haurakiana  Thomsen, 1991                   Spec… acan… https:…
## # ℹ 6,841 more rows

The full taxonomic information can be accessed as an unparsed list by enabling the unparsed parameter.

Each taxon sheet on Nordic Microalgae contains facts, such as links to external webpages (e.g. AlgaeBase, WoRMS and Dyntaxa). These links can be retrieved through the API.

# Randomly select 10 taxa from shark_taxon$scientific_name
slugs <- sample(taxa$slug, size = 10)

# Get external links
external_links <- get_nua_external_links(slugs, 
                                         verbose = FALSE, 
                                         unparsed = FALSE)

# Print list
tibble(external_links)
## # A tibble: 47 × 6
##    slug                 provider  label     external_id external_url  collection
##    <chr>                <chr>     <chr>     <chr>       <chr>         <chr>     
##  1 ptychodiscaceae      ENA       ENA       1886617     https://www.… External …
##  2 ptychodiscaceae      GBIF      GBIF      8116561     https://www.… External …
##  3 ptychodiscaceae      ITIS      ITIS      573293      http://www.i… External …
##  4 ptychodiscaceae      NCBI      NCBI      1886617     https://www.… External …
##  5 ptychodiscaceae      WoRMS     WoRMS     146249      https://www.… External …
##  6 ruthnielsenia-tenuis AlgaeBase AlgaeBase 65060       https://www.… External …
##  7 ruthnielsenia-tenuis Dyntaxa   Dyntaxa   232794      https://namn… External …
##  8 ruthnielsenia-tenuis ENA       ENA       262505      https://www.… External …
##  9 ruthnielsenia-tenuis GBIF      GBIF      8162095     https://www.… External …
## 10 ruthnielsenia-tenuis NCBI      NCBI      262505      https://www.… External …
## # ℹ 37 more rows

The full list of facts can be accessed as an unparsed list by setting the unparsed parameter to TRUE.

Get Nordic Microalgae Harmfulness Information

Taxa listed in the IOC-UNESCO Taxonomic Reference List of Harmful Micro Algae contain information about harmfulness. This information can be retrieved through the API.

# Get external links
harmfulness <- get_nua_harmfulness(c("dinophysis-acuta", 
                                     "alexandrium-ostenfeldii"), 
                                   verbose = FALSE)

# Print list
tibble(harmfulness)
## # A tibble: 11 × 6
##    slug                    provider   label  external_id external_url collection
##    <chr>                   <chr>      <chr>  <chr>       <chr>        <chr>     
##  1 dinophysis-acuta        IOC        IOC H… 109604      https://www… Harmful a…
##  2 dinophysis-acuta        IOC-UNESCO IOC-U… 6           https://tox… Harmful a…
##  3 dinophysis-acuta        IOC-UNESCO IOC-U… 1           https://tox… Harmful a…
##  4 dinophysis-acuta        IOC-UNESCO IOC-U… 5           https://tox… Harmful a…
##  5 alexandrium-ostenfeldii IOC        IOC H… 109712      https://www… Harmful a…
##  6 alexandrium-ostenfeldii IOC-UNESCO IOC-U… 464         https://tox… Harmful a…
##  7 alexandrium-ostenfeldii IOC-UNESCO IOC-U… 463         https://tox… Harmful a…
##  8 alexandrium-ostenfeldii IOC-UNESCO IOC-U… 462         https://tox… Harmful a…
##  9 alexandrium-ostenfeldii IOC-UNESCO IOC-U… 12          https://tox… Harmful a…
## 10 alexandrium-ostenfeldii IOC-UNESCO IOC-U… 15          https://tox… Harmful a…
## 11 alexandrium-ostenfeldii IOC-UNESCO IOC-U… 17          https://tox… Harmful a…

Links to all images present on Nordic Microalgae can be retrieved through the API. The images are available in four sizes: original (o), small (s), medium (m), and large (l).

# Get all media links
media <- get_nua_media_links(unparsed = FALSE)

# Print list
tibble(media)
## # A tibble: 2,411 × 10
##    slug              image_l_url image_o_url image_s_url image_m_url contributor
##    <chr>             <chr>       <chr>       <chr>       <chr>       <chr>      
##  1 eucampia-zodiacus https://no… https://no… https://no… https://no… Susanne Bu…
##  2 dinophysis-odiosa https://no… https://no… https://no… https://no… Susanne Bu…
##  3 ebria-tripartita  https://no… https://no… https://no… https://no… Susanne Bu…
##  4 ebria-tripartita  https://no… https://no… https://no… https://no… Susanne Bu…
##  5 ebria-tripartita  https://no… https://no… https://no… https://no… Susanne Bu…
##  6 ebria-tripartita  https://no… https://no… https://no… https://no… Susanne Bu…
##  7 dicroerisma-psil… https://no… https://no… https://no… https://no… Susanne Bu…
##  8 volvox            https://no… https://no… https://no… https://no… Per Wilhel…
##  9 cyclotella        https://no… https://no… https://no… https://no… Per Wilhel…
## 10 fragilaria        https://no… https://no… https://no… https://no… Per Wilhel…
## # ℹ 2,401 more rows
## # ℹ 4 more variables: photographer_artist <chr>, copyright_holder <chr>,
## #   license <chr>, galleries <chr>

Complete media information can be retrieved as an unparsed list by setting the unparsed parameter to TRUE.

Citation

## To cite package 'SHARK4R' in publications use:
## 
##   Markus Lindh, Anders Torstensson (2025). SHARK4R: Retrieving,
##   Analyzing, and Validating Marine Data from SHARK and Nordic
##   Microalgae. R package version 0.1.7.
##   https://doi.org/10.5281/zenodo.14169399
## 
## A BibTeX entry for LaTeX users is
## 
##   @Manual{,
##     title = {SHARK4R: Retrieving, Analyzing, and Validating Marine Data from SHARK and Nordic Microalgae},
##     author = {Markus Lindh and Anders Torstensson},
##     year = {2025},
##     note = {R package version 0.1.7},
##     url = {https://doi.org/10.5281/zenodo.14169399},
##   }