Journal ArticleDOI
Diet of Worms Emended: An Update of Polychaete Feeding Guilds
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TLDR
Polychaetes are common in most marine habitats and dominate many infaunal communities and now include osmotrophic siboglinids as well as sipunculans, echiurans, and myzostomes, which molecular genetic analyses have placed within Annelida.Abstract:
Polychaetes are common in most marine habitats and dominate many infaunal communities. Functional guild classification based on taxonomic identity and morphology has linked community structure to ecological function. The functional guilds now include osmotrophic siboglinids as well as sipunculans, echiurans, and myzostomes, which molecular genetic analyses have placed within Annelida. Advances in understanding of encounter mechanisms explicitly relate motility to feeding mode. New analyses of burrowing mechanics explain the prevalence of bilateral symmetry and blur the boundary between surface and subsurface feeding. The dichotomy between microphagous deposit and suspension feeders and macrophagous carnivores, herbivores, and omnivores is further supported by divergent digestive strategies. Deposit feeding appears to be limited largely to worms longer than 1 cm, with juveniles and small worms in general restricted to ingesting highly digestible organic material and larger, rich food items, blurring the macrophage-microphage dichotomy that applies well to larger worms.read more
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References
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Journal ArticleDOI
Stable isotopes in ecosystem studies
Bruce J. Peterson,Brian Fry +1 more
TL;DR: The use of stable isotopes to solve biogeochemical problems in ecosystem analysis is increasing rapidly because stable isotope data can contribute both source-sink (tracer) and process information: the elements C, N, S, H, and all have more than one isotope, and isotopic compositions of natural materials can be measured with great precision with a mass spectrometer as mentioned in this paper.
The Diet of Worms: A Study of Polychaete Feeding Guilds
TL;DR: A review of the eating habits of polychaetes can be found in this article, where the polychaete families are arranged in alphabetical order and the feeding habits of each are summarized.
Journal ArticleDOI
Sources of variation in consumer-diet δ15N enrichment: a meta-analysis
TL;DR: Overall, the analyses point to several important sources of variation in δ15N enrichment and suggest that the most important of them are the main biochemical form of nitrogen excretion and nutritional status.
Journal ArticleDOI
Variation in discrimination factors (Δ15N and Δ13C): the effect of diet isotopic values and applications for diet reconstruction
TL;DR: In this paper, an extensive review of the literature concerning estimates of animal-diet Δ13C and Δ15N was conducted to test the effect of diet isotopic ratio on the discrimination factor, taking into account taxa, tissues, environments and lipid extraction treatments.
the effect of diet isotopic values and applications for diet reconstruction
TL;DR: A method to calculate discrimination factors based on data on diet isotope ratios, termed the ‘Diet-Dependent Discrimination Factor’, DDDF is proposed and found a significant negative relationship between both, Δ13C and Δ15N, with their corresponding diet isotopic ratios.