Food-Web Structure in Four Locations Along the European Shelf Indicates Spatial Differences in Ecosystem Functioning

Silberberger, Marc J.; Renaud, Paul E.; Kröncke, Ingrid; Reiss, Henning

doi:10.3389/fmars.2018.00119

Cited by 25 publications

(23 citation statements)

References 71 publications

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“…morphology) when feeding information is lacking (in our case accounting for 31% of interactions), is further likely to overestimate the number of links realized at any given time and influence food web properties. Using stable isotopes, Silberberger et al (2018) found that cod occupies the top position in the German Bight food web, whereas its position, in our metaweb, is lower and shared with other species. This is obviously not true, and this assumption does not address consumer preferences and behaviours.…”

Section: Ecosystem Management: Perspective Strength and Limitations mentioning

confidence: 68%

“…temporal coupling/ decoupling, McMeans et al 2015). Using stable isotopes, Silberberger et al (2018) found that cod occupies the top position in the German Bight food web, whereas its position, in our metaweb, is lower and shared with other species. For cod, this is likely because the ontogenetic shift from predominant benthivory towards piscivory is not represented in our food web.…”

Section: Ecosystem Management: Perspective Strength and Limitations mentioning

confidence: 69%

“…In assigning trophic interactions, we excluded any ontogenetic diet shifts -making no distinction between a juvenile and an adult, and not assigning feeding preferences for different life stages -which may have led to an average lower trophic positioning of taxa than reported using e.g. stable isotopes (Silberberger et al 2018). Some taxa feed on the eggs and larvae of other taxa (e.g.…”

Section: Trophic Relationshipsmentioning

confidence: 99%

See 2 more Smart Citations

Exploring the temporal variability of a food web using long‐term biomonitoring data

Olivier

Frelat²,

Bonsdorff

et al. 2019

Ecography

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Ecological communities are constantly being reshaped in the face of environmental change and anthropogenic pressures. Yet, how food webs change over time remains poorly understood. Food web science is characterized by a trade-off between complexity (in terms of the number of species and feeding links) and dynamics. Topological analysis can use complex, highly resolved empirical food web models to explore the architecture of feeding interactions but is limited to a static view, whereas ecosystem models can be dynamic but use highly aggregated food webs. Here, we explore the temporal dynamics of a highly resolved empirical food web over a time period of 18 years, using the German Bight fish and benthic epifauna community as our case study. We relied on long-term monitoring ecosystem surveys (from 1998 to 2015) to build a metaweb, i.e. the meta food web containing all species recorded over the time span of our study. We then combined time series of species abundances with topological network analysis to construct annual food web snapshots. We developed a new approach, 'node-weighted' food web metrics by including species abundances to represent the temporal dynamics of food web structure, focusing on generality and vulnerability. Our results suggest that structural food web properties change through time; however, binary food web structural properties may not be as temporally variable as the underlying changes in species composition. Further, the node-weighted metrics enabled us to detect that food web structure was influenced by changes in species composition during the first half of the time series and more strongly by changes in species dominance during the second half. Our results demonstrate how ecosystem surveys can be used to monitor temporal changes in food web structure, which are important ecosystem indicators for building marine management and conservation plans.

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Section: Ecosystem Management: Perspective Strength and Limitations mentioning

confidence: 68%

Section: Ecosystem Management: Perspective Strength and Limitations mentioning

confidence: 69%

Section: Trophic Relationshipsmentioning

confidence: 99%

See 1 more Smart Citation

Exploring the temporal variability of a food web using long‐term biomonitoring data

Olivier

Frelat²,

Bonsdorff

et al. 2019

Ecography

Self Cite

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“…In addition, comparison between systems with different environmental features is recognized as a convenient framework to identify key environmental and anthropic drivers of trophic functioning (e.g. Graham et al, 2017;Silberberger et al, 2018;Udy et al, 2019;Vander Zanden et al, 2005;Ware and Thomson, 2005). The three French marine ecosystems (Eastern English Channel, Bay of Biscay and Gulf of Lions) are thus well-suited for undertaking such a comparison, since they differ in the environmental parameters, notably the intensity of primary production and average depth (Table 1).…”

Section: Introductionmentioning

confidence: 99%

Primary production and depth drive different trophic structure and functioning of fish assemblages in French marine ecosystems

Cresson

Chouvelon

Bustamante

et al. 2020

Progress in Oceanography

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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“…Today, the common approach to lipid normalization, however, is to apply one formula across all taxa when whole food webs are studied (e.g. Silberberger et al, 2018). This approach is very likely to introduce a considerable bias in such studies, considering how differently L. balthica and C. crangon are affected.…”

Section: Mathematically Corrected Datamentioning

confidence: 99%

Sample preservation and pre-treatment in stable isotope analysis: Implications for the study of aquatic food webs

Silberberger

Koziorowska-Makuch

Kuliński

et al. 2020

Preprint

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Abstract. Stable isotope analysis has become one of the most widely used techniques in ecology. However, uncertainties about the effects of sample preservation and pre-treatment on the ecological interpretation of stable isotope data and especially on Bayesian stable isotope mixing models remain. Here, Bayesian mixing models were used to study how three different preservation methods (drying, freezing, formalin) and two pre-treatments (acidification, lipid removal) affect the estimation of diet composition for two benthic invertebrate species (Limecola balthica, Crangon crangon). Furthermore, commonly used mathematical lipid normalization and formalin correction were applied to check if they improve the model results. Preservation effects were strong on model outcomes for frozen as well as formalin preserved L. balthica samples, but not for C. crangon. Pre-treatment effects varied with species and preservation method and neither lipid normalization nor mathematical formalin correction consistently resulted in improved model outcomes. Our analysis highlights that particularly small changes in δ15N introduced by different preservation and pre-treatments display a so far unrecognized source of error in stable isotope studies. We conclude that mathematical correction of stable isotopes data should be avoided for Bayesian mixing models and that previously unaddressed effects of sample preservation (especially those arising from preservation by freezing) have potentially biased our understanding of the utilization of organic matter in aquatic food webs.

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Food-Web Structure in Four Locations Along the European Shelf Indicates Spatial Differences in Ecosystem Functioning

Cited by 25 publications

References 71 publications

Exploring the temporal variability of a food web using long‐term biomonitoring data

Exploring the temporal variability of a food web using long‐term biomonitoring data

Primary production and depth drive different trophic structure and functioning of fish assemblages in French marine ecosystems

Sample preservation and pre-treatment in stable isotope analysis: Implications for the study of aquatic food webs

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