Contributions of Benthic Algae to Lake Food Webs as Revealed by Stable Isotope Analysis

1995 ◽  
Vol 14 (4) ◽  
pp. 631-653 ◽  
Author(s):  
R. E. Hecky ◽  
R. H. Hesslein
Keyword(s):  
Stable Isotope ◽  
Food Webs ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Benthic Algae

Current methods and future directions in avian diet analysis

The Auk ◽  
2021 ◽  
Author(s):  
Brandon D Hoenig ◽  
Allison M Snider ◽  
Anna M Forsman ◽  
Keith A Hobson ◽  
Steven C Latta ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Food Webs ◽  
Stable Isotope Analysis ◽  
Dietary Habits ◽  
Isotope Analysis ◽  
Diet Analysis ◽  
Unified Framework ◽  
Future Directions ◽  
Laboratory Techniques ◽  
Prey Identification

Abstract Identifying the composition of avian diets is a critical step in characterizing the roles of birds within ecosystems. However, because birds are a diverse taxonomic group with equally diverse dietary habits, gaining an accurate and thorough understanding of avian diet can be difficult. In addition to overcoming the inherent difficulties of studying birds, the field is advancing rapidly, and researchers are challenged with a myriad of methods to study avian diet, a task that has only become more difficult with the introduction of laboratory techniques to dietary studies. Because methodology drives inference, it is important that researchers are aware of the capabilities and limitations of each method to ensure the results of their study are interpreted correctly. However, few reviews exist which detail each of the traditional and laboratory techniques used in dietary studies, with even fewer framing these methods through a bird-specific lens. Here, we discuss the strengths and limitations of morphological prey identification, DNA-based techniques, stable isotope analysis, and the tracing of dietary biomolecules throughout food webs. We identify areas of improvement for each method, provide instances in which the combination of techniques can yield the most comprehensive findings, introduce potential avenues for combining results from each technique within a unified framework, and present recommendations for the future focus of avian dietary research.

Stable isotope analysis of food webs in wetland areas of Lake Balaton, Hungary abb;5

1999 ◽  
Vol 146 (1) ◽  
pp. 117-128 ◽  
Author(s):  
István Tátrai ◽  
Kálmán Mátyás ◽  
János Korponai ◽  
Gábor Paulovits ◽  
Piroska Pomogyi ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Food Webs ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Lake Balaton

scholarly journals Different transfer pathways of an organochlorine pesticide across marine tropical food webs assessed with stable isotope analysis

PLoS ONE ◽  
2018 ◽  
Vol 13 (2) ◽  
pp. e0191335 ◽  
Author(s):  
Charlotte R. Dromard ◽  
Yolande Bouchon-Navaro ◽  
Sébastien Cordonnier ◽  
Mathilde Guéné ◽  
Mireille Harmelin-Vivien ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Food Webs ◽  
Organochlorine Pesticide ◽  
Stable Isotope Analysis ◽  
Isotope Analysis

Effects of terrestrial input on macrobenthic food webs of coastal sea are detected by stable isotope analysis in Gaeta Gulf

2015 ◽  
Vol 154 ◽  
pp. 158-168 ◽  
Author(s):  
Giulio Careddu ◽  
Maria Letizia Costantini ◽  
Edoardo Calizza ◽  
Pasquale Carlino ◽  
Flavia Bentivoglio ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Food Webs ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Coastal Sea ◽  
Terrestrial Input

Stable isotope analysis confirms substantial differences between subtropical and temperate shallow lake food webs

Hydrobiologia ◽  
2016 ◽  
Vol 784 (1) ◽  
pp. 111-123 ◽  
Author(s):  
Carlos Iglesias ◽  
Mariana Meerhoff ◽  
Liselotte S. Johansson ◽  
Ivan González-Bergonzoni ◽  
Néstor Mazzeo ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Food Webs ◽  
Stable Isotope Analysis ◽  
Shallow Lake ◽  
Isotope Analysis

scholarly journals Network-Based Biomonitoring: Exploring Freshwater Food Webs With Stable Isotope Analysis and DNA Metabarcoding

2019 ◽  
Vol 7 ◽  
Author(s):  
Zacchaeus G. Compson ◽  
Wendy A. Monk ◽  
Brian Hayden ◽  
Alex Bush ◽  
Zoë O'Malley ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Food Webs ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Dna Metabarcoding

scholarly journals Stable nitrogen isotope analysis of amino acids as a new tool to clarify complex parasite-host interactions within marine food webs

2021 ◽  
Author(s):  
Philip Riekenberg ◽  
Tijs Joling ◽  
Lonneke L. IJsseldijk ◽  
Andreas M. Waser ◽  
Marcel van der Meer ◽  
...  
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Stable Isotope ◽  
Food Webs ◽  
Stable Isotope Analysis ◽  
Trophic Interactions ◽  
Trophic Position ◽  
Isotope Analysis ◽  
Isotopic Analysis ◽  
Parasitic Interactions

AbstractTraditional bulk isotopic analysis is a pivotal tool for mapping consumer-resource interactions in food webs but has largely failed to adequately describe parasite-host relationships. Thus, parasite-host interactions remain largely understudied in food web frameworks despite these relationships increasing linkage density, connectance, and ecosystem biomass. Compound-specific stable isotopes from amino acids provides a promising novel approach that may aid in mapping parasitic interactions in food webs. However, to date it has not been applied to parasitic trophic interactions.Here we use a combination of traditional bulk stable isotope analyses and compound-specific isotopic analysis of the nitrogen in amino acids to examine resource use and trophic interactions of five parasites from three hosts from a marine coastal food web (Wadden Sea, European Atlantic). By comparing isotopic compositions of bulk and amino acid nitrogen, we aimed to characterize isotopic fractionation occurring between parasites and their hosts and to clarify the trophic position of the parasites.Our results showed that parasitic trophic interactions were more accurately identified when using compound-specific stable isotope analysis due to removal of underlying source isotopic variation for both parasites and hosts, and avoidance of the averaging of amino acid variability in bulk analyses through use of multiple trophic amino acids. The compound-specific method provided clear trophic discrimination factors in comparison to bulk isotope methods, however, those differences varied significantly among parasite species.Amino acid compound specific isotope analysis has widely been applied to examine trophic position within food webs, but our analyses suggest that the method is particularly useful for clarifying the feeding strategies for parasitic species. Baseline isotopic information provided by source amino acids allows clear identification of the fractionation occurring due to parasite metabolism by integrating underlying isotopic variations from the host tissues. However, like for bulk isotope analysis, the application of a universal trophic discrimination factor to parasite-host relationships remains inappropriate for compound-specific stable isotope analysis. Despite this limitation, compound-specific stable isotope analysis is and will continue to be a valuable tool to increase our understanding of parasitic interactions in marine food webs.

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