Bayesian stable isotope mixing models effectively characterize the diet of an Arctic raptor ...
1. Bayesian stable isotope mixing models (BSIMMs) for δ13C and δ15N can be a useful tool to reconstruct diets, characterize trophic relationships, and assess spatiotemporal variation in food webs. However, use of this approach typically requires a priori knowledge on the level of enrichment occurrin...
| Main Authors: | , , , , |
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| Format: | Dataset |
| Language: | English |
| Published: |
Dryad
2020
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.5061/dryad.6m905qfxs https://datadryad.org/stash/dataset/doi:10.5061/dryad.6m905qfxs |
| Summary: | 1. Bayesian stable isotope mixing models (BSIMMs) for δ13C and δ15N can be a useful tool to reconstruct diets, characterize trophic relationships, and assess spatiotemporal variation in food webs. However, use of this approach typically requires a priori knowledge on the level of enrichment occurring between the diet and tissue of the consumer being sampled (i.e., a trophic discrimination factor or TDF). 2. TDFs derived from captive feeding studies are highly variable, and it is challenging to select the appropriate TDF for diet estimation in wild populations. We introduce a novel method for estimating TDFs in a wild population: a proportionally balanced equation that uses high-precision diet estimates from nest cameras installed on a subset of nests in lieu of a controlled feeding study (TDFCAM). 3. We tested the ability of BSIMMs to characterize diet in a free-living population of gyrfalcon (Falco rusticolus) nestlings by comparing model output to high-precision nest camera diet estimates. We analyzed the ... : This dataset contains the following files: "camera_data.csv": Raw prey delivery observations from gyrfalcon nest cameras. "GYRF_isotopes.csv": Raw stable isotope values (d13C & d15N) from gyrfalcon red blood cells. "prey_isotopes.csv": Raw stable isotope values (d13C & d15N) from muscle tissue samples from gyrfalcon prey species. Further methodological details can be found in the article to which this dataset is supplement (JAE-2020-00518). ... |
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