---
title: "Retrieve Data From Nordic Microalgae"
output:
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vignette: >
  %\VignetteIndexEntry{Retrieve Data From Nordic Microalgae}
  %\VignetteEngine{knitr::rmarkdown}
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---

## Nordic Microalgae

[Nordic Microalgae](https://nordicmicroalgae.org/) 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 (Torstensson et al. 2024). 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](https://nordicmicroalgae.org/api/). Below are examples demonstrating how to extract data using the SHARK4R package.

## Getting Started

#### Installation

You can install the latest version of `SHARK4R` from CRAN using:
```{r, eval=FALSE}
install.packages("SHARK4R")
```

Load the `SHARK4R` and `dplyr` libraries:
```{r}
library(SHARK4R)
```

## Retrieve Complete Nordic Microalgae Taxon Table

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

```{r}
# Get taxa information
taxa <- get_nua_taxa(unparsed = FALSE)

# Print data
print(taxa)
```

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

## Get Nordic Microalgae External Links or Facts

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.

```{r}
# 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
print(external_links)
```

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](https://www.marinespecies.org/hab/) contain information about harmfulness. This information can be retrieved through the API.

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

# Print list
print(harmfulness)
```

## Get Nordic Microalgae Media Links

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).

```{r}
# Get all media links
media <- get_nua_media_links(unparsed = FALSE)

# Print list
print(media)
```

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

## Get NOMP and EG Phyto Biovolume lists

To standardize phytoplankton monitoring efforts in the Baltic Sea, Skagerrak, and the North Sea, various lists containing size class information for each taxon have been established. These lists can be retrieved directly in R using `SHARK4R`:

```{r}
# Get EG Phyto Biovolume list
peg_list <- get_peg_list()

# Print list
print(peg_list)

# Get NOMP Biovolume list
nomp_list <- get_nomp_list()

# Print list
print(nomp_list)
```

Please note that `SHARK4R` also includes a useful function for reading exported [Plankton Toolbox](https://nordicmicroalgae.org/plankton-toolbox/) data files: `read_ptbx()`.

---

## Citation

```{r, echo=FALSE}
# Print citation
citation("SHARK4R")
```

```{r, echo=FALSE}
clean_shark4r_cache(0, clear_perm_cache = TRUE, verbose = FALSE)
```

---

## References

- Torstensson, A., Loo, A., Sundqvist, L., Skjevik, A.-T., Karlberg, M., Johansen, M., Andreasson, A., and Karlson, B. (2024). Nordic Microalgae 2.0, Accessed at www.nordicmicroalgae.org on `r Sys.Date()`.
