Data Set Citation:
When using this data, please cite the data package:
Naoto F. I.
Global dataset for carbon and nitrogen stable isotope ratios of lotic periphyton
ERDP-2018-04.1.1 (http://db.cger.nies.go.jp/JaLTER/metacat/metacat/ERDP-2018-04.1.1/jalter-en)
General Information:
Title:Global dataset for carbon and nitrogen stable isotope ratios of lotic periphyton
Identifier:ERDP-2018-04.1.1
Abstract:
Carbon and nitrogen stable isotope ratios (δ13C and δ15 N) have been widely employed in food web analysis. In lotic environments, periphyton is a major primary producer that makes a large contribution to food web production as well as carbon and nitrogen cycling. While the δ13C and δ15N values have many advantages as a natural tracer, the controls over their high spatial and temporal variability in stream periphyton are not well known. Here, we present the global dataset of δ13C and δ15N values of lotic periphyton from 54 published and two unpublished sources, including 978 observations from 148 streams/rivers in 38 regions around the world, from arctic to tropical sites. The 54 published sources were articles recorded during the period of 1994–2016 in 25 academic journals. The two unpublished sources were from the authors’ own data. The dataset showed that δ13C and δ15N values of periphyton ranged from −47.3 to −9.3‰ and from −5.6 to +22.6‰, respectively. The dataset also includes physicochemical factors (altitude, coordinates, catchment area, width, depth, geology, vegetation, canopy coverage, biome, season, presence of anadromous salmon, temperature, pH, current velocity, and discharge), nutrient data (nitrate and ammonium concentrations), and algal attributes (chlorophyll a concentration, algal species compositions, and carbonates removal) in streams/rivers studied, all of which may help interpret the δ13C and δ15N values of periphyton. The metadata file outlines structure of all the data and with references for data sources, providing a resource for future food web studies in stream and river ecosystems.
Keywords:
  • δ15N
  • δ13C
  • algae
  • food web
  • stream
  • river
  • source
  • fractionation
  • environmental factors
Data Table, Image, and Other Data Details:
Metadata download: Ecological Metadata Language (EML) File
Data Table:global_SI_periphyton ( View Metadata | Download File download)

Involved Parties

Data Set Owners:
Individual: Ishikawa Naoto F.
Organization:Department of Biogeochemistry, Japan Agency for Marine-Earth Science and Technology
Address:
2-15 Natsushima-cho,
Yokosuka, 237-0061 Japan
Phone:
+81 46 867 9812 (voice)
Email Address:
naoto.f.ishikawa@gmail.com; ishikawan@jamstec.go.jp
Data Set Contacts:
Individual: Ishikawa Naoto F.
Organization:Department of Biogeochemistry, Japan Agency for Marine-Earth Science and Technology
Address:
2-15 Natsushima-cho,
Yokosuka, 237-0061 Japan
Phone:
+81 46 867 9812 (voice)
Email Address:
naoto.f.ishikawa@gmail.com; ishikawan@jamstec.go.jp

Data Set Characteristics

Geographic Region:
Geographic Description:Global dataset for carbon and nitrogen stable isotope ratios of lotic periphyton
Bounding Coordinates:
West:  -151.5561  degrees
East:  143.3345  degrees
North:  68.6166  degrees
South:  -25.868  degrees
Mimimum Altitude:3.0  meter
Maximum Altitude:2425.0  meter
Time Period:
Begin:
1989
End:
2015

Sampling, Processing and Quality Control Methods

Step by Step Procedures
Step 1:
Description:

Data gathering

We searched for data from published sources using ISI Web of Science (http://www.isiknowledge.com). Search terms included ‘periphyt*’, ‘algae’, ‘isotope’, and ‘stream’, in accordance with our previous paper (Ishikawa et al. 2012). The search was conducted on 11 January 2016 and returned 256 studies. We also added studies found in the journals Limnology and Oceanography, Freshwater Biology, Journal of the North American Benthological Society, Canadian Journal of Aquatic and Fisheries Science, Hydrobiologia, and Ecology that were not detected in our Web of Science search. Also, we included unpublished data from our own studies. We selected the studies that provided carbon and nitrogen stable isotope values of stream periphyton. Benthic algae, epilithic algae, filamentous algae, littoral algae, micro algae, epilithon, epiphyton, periphytic biofilms, phototrophic biofilms, and phytomicrobenthos were regarded as periphyton in this study. Studies were screened according to the following criteria: 1. The study was conducted in a field setting. 2. The study provided periphyton δ13C and/or δ15N. 3. The study did not use 13C and 15N tracer additions. After this screening, we ultimately selected 54 papers and used 978 data points (including unpublished 260 data points from Hideyuki Doi and Jacques C. Finlay). Materials and methods for the unpublished data are available in Finlay (2001) and Doi et al. (2007). When the papers presented their data in figures, we extracted the data using graph digitizing software PlotDigitizer X ver. 2.0.1 (http://www.surf.nuqe.nagoya-u.ac.jp/~nakahara/Software/PlotDigitizerX/index-e.html).

Step 2:
Description:

Putative control variables

Putative control variables for carbon and nitrogen isotopes of periphyton were extracted from individual studies or, for a small number of cases, provided directly by authors. We categorized the biome (alpine; arctic; boreal; subtropical; temperate; tropical) of the study sites from the location of rivers studied. For temperate regions, sampling periods were categorized into groups approximating four seasons (Spring: March-May; Summer: June-August; Autumn: September-November Winter: December-February for Northern hemisphere, Spring: September-November; Summer: December-February; Autumn: March-May; Winter: June-August for Southern hemisphere). Physicochemical factors (altitude, coordinates, catchment area, width, depth, geology, vegetation, canopy coverage, biome, season, presence of anadromous salmon, temperature, pH, current velocity, and discharge), nutrient data (nitrate and ammonium concentrations), and algal attributes (chlorophyll a concentration, algal species compositions, and carbonates removal) in streams/rivers studied, were also obtained.

Data Set Usage Rights

This work is licensed under a Creative Commons Attribution 4.0 International License.
Access Control:
Auth System:JaLTER
Order:allowFirst
Allow: [read] public
Additional Metadata
Metadata download: Ecological Metadata Language (EML) File