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It seems that the central stations do not have data at all.
Cori suggested it might be because the data is just Giant kelp, however, the metadata mentions that this data set should include both giant kelp, Macrocystis pyrifera, and bull kelp, Nereocystis luetkeana.
I need to check my code and if correct reach out to know if it is expected
Actually looking more carefully at the metadata I found this statement:
Biomass data (wet weight, kg) are given for individual 30 x 30 meter pixels in the coastal areas extending from near Ano Nuevo, CA through the southern range limit in Baja California (including offshore islands), representing the range where giant kelp is the dominant canopy forming species.
We decided to produce our own gridded product of maximum Kelp extent for habitat analysis.
I found this data set on EDI: https://portal.edirepository.org/nis/mapbrowse?packageid=knb-lter-sbc.74.17
Note:
Here is the workflow attempted so far:
tidync
package; this data frame will have time x stations nrowgroup_by
station taking the max value since it is what we are interested in (max biomass); this results in a data frame having one row per stationsf
objectHere is the script: https://github.com/NCEAS/ca-mpa/blob/main/analyses/7habitat/code/kelplter_data.R
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