Size and isotopic ratios of macroinvertebrates in mangroves with and without seabirds
Data files
Nov 27, 2024 version files 79.96 KB
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crab.csv
11.67 KB
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foodweb_isotope.csv
55.08 KB
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mollusc.csv
10.96 KB
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README.md
2.24 KB
Abstract
This dataset is used to investigate the trophic-response of mangrove invertebrate communities to nutrient subsidies supplied by seabird populations. It provides nitrogen (δ15N) and carbon (δ13C) isotopic composition of seabird guano, basal food sources (sediment, mangrove leaves, epiphytic macroalgae) and macroinvertebrate consumers (littornid gastropod, sesarmid crab, portunid crabs), as well as sizes of consumers, from mangroves with and without nesting seabirds. The data is used to determine the impacts of seabird-derived nutrients on mangrove macroinvertebrate sizes and resource contributions.
https://doi.org/10.5061/dryad.dncjsxm6m
The dataset contains the following raw data : Foodweb isotopic ratios (1 file), Gastropod size and isotopic ratios (1 file) and Crab size and isotopic ratios (1 file).
Description of the data and file structure
Sample collection for this dataset occurred at 10 sites (5 seabird, 5 non-seabird sites) on Aldabra Atoll (Seychelles). Mangrove leaves, sediment, epiphytic macroalgae and gastropod samples were collected within 8 quadrats at each site (suffix A-H), while mangrove crabs were sampled randomly at the sites.
Raw data files:
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Foodweb isotopic ratios:
foodweb_isotope.csv: isotope values of nitrogen (d15N) and carbon (d13C) and nitrogen (XN) and carbon (XC) of foodweb compartments - mangrove leaves, sediment, epiphytic macroalgae, littorinid gastropod (Littoraria spp.), sesarmid crab (Sesarma leptosoma), portunid crab (Thalamita crenata). d15N and d13C values are in ppm (‰) and XN are in percent (%). Cells containing na = not applicable or no data.
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Gastropod size and isotopic ratios:
- mollusc.csv: shell height, isotope values of nitrogen (d15N) and carbon (d13C) and nitrogen content (XN) of littorinid gastropods. Isotope and nitrogen values are similar to foodweb_isotope.csv. Shell height is in mm.
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Crab size and isotopic ratios:
- crab.csv: carapace width, isotope values of nitrogen (d15N) and carbon (d13C) and nitrogen content (XN) of sesarmid and portunid crabs. Isotope and nitrogen values are similar to foodweb_isotope.csv. Carapace width is in mm.
Sharing/Access information
Data on nitrogen content and nitrogen isotopic ratios of some food web components has been used in this study: Appoo, J., N. Bunbury, S. Jaquemet, and N. A. J. Graham. 2024. “Seabird Nutrient Subsidies Enrich Mangrove Ecosystems and Are Exported to Nearby Coastal Habitats.” iScience 27 (4): 109404
The above study is linked to this Dryad dataset
This dataset was collected within the mangrove forests of Aldabra Atoll (Seychelles) between November 2022 and February 2023.
Details for each dataset are provided in the README file.
- Appoo, Jennifer; Graham, Nicholas A. J.; Jones, Christopher W. et al. (2024). Seabird nutrient subsidy alters size and resource use of functionally important mangrove macroinvertebrates. Ecosphere. https://doi.org/10.1002/ecs2.70121