Phytoplankton from the White Sea, Barents Sea, Norwegian Sea and Arctic Basin 1993-2003
This dataset describes the Arctic plankton species and diversity in a study area northwest of Russia, and was collected as part of the Arctic Ocean Diversity project.
Dataset Location: Dataset available from iOBIS.org (OBIS Resource ID 1559), and also from here, but the relevant link on this page is broken as of 29 April 2016.
Site Location: White Sea, Barents Sea, Norwegian Sea, Arctic Basin
Site(s) Georeferenced: Yes
Timespan: 1993 - 2003
Sampling Frequency: Samples collected multiple times per month for a variable number of months per year.
Data collection summary/Methods: Unknown
Data collected: Species counts
Known Issues: 1) Sampling is uneven across years. 2) The raw data downloaded from iOBIS.org have a "frameshift mutation" due to extra double quotes in the 'sauthor' field. For 1,174 records, the 'sauthor' value accidentally got split on a comma into both the 'sauthor' and 'tname' fields, shifting all subsequent fields one column to the right. The R code below fixes this issue.
rawdata = read.csv('raw_data_downloaded_from_OBIS.csv', header=T, stringsAsFactors = FALSE)
rawdata$index = 1:nrow(rawdata)
# These data are formatted properly (there should be no value in the 'collector' field if there was no frameshift)
rawdata1 = rawdata[is.na(rawdata$collector),]
# These data need to be fixed (a column shift has resulted in non-NA values in that field)
rawdata2 = rawdata[!is.na(rawdata$collector),]
# Problematic fields are sauthor and tname; last two characters of tname are "", and these are removed
new_sauthor = paste(rawdata2$sauthor, ",", substring(rawdata2$tname, 1, nchar(rawdata2$tname)-2), sep = '')
fixeddata2 = cbind(rawdata2[, 1:19], new_sauthor, rawdata2[, 22:100])
names(fixeddata2) = names(rawdata)[c(1:98, 100)]
fixeddata = rbind(rawdata1[, c(1:98, 100)], fixeddata2)
# Put the fixed data back into the original order
fixeddata = fixeddata[order(fixeddata$index, decreasing = FALSE), 1:98]
Conditions for use:
Citation/ Distributing Author:
Supplemental resources: There is no official data publication, although a few studies have made use of these data including:
- Dornelas et al. 2014 Science. 2014 Apr 18;344(6181):296-9. doi: 10.1126/science.1248484.
- Thessen et al. 2012, PLoS ONE http://dx.doi.org/10.1371/journal.pone.0044015
- O'Brien et al. 2013, Earth System Science Data 5: 259-276 (2013)
Available via the EcoData Retriever: No