Acoustic measures of lake community size spectra

Wheeland, Laura J.; Rose, George A.

doi:10.1139/cjfas-2014-0446

Cited by 15 publications

(11 citation statements)

References 53 publications

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“…It would be useful to predict species richness from the outputs of these increasingly sophisticated models. Second, there are efficient techniques to measure individual sizes without identifying species, particularly in aquatic systems (Sheldon et al 1972, Turnbull et al 2014, Wheeland and Rose 2016. Relating the data sets from these techniques to species richness would yield rapid estimates of species richness without the often substantial additional effort of identifying species.…”

Section: Discussionmentioning

confidence: 99%

“…Some recent empirical studies successfully predicted ISDs from environmental variables (dos Santos et al 2017, Yen et al 2017a, b, Zhao et al 2017. Such studies are supported by efficient methods to measure individuals' sizes in the field without recording species' identities (Sheldon et al 1972, Turnbull et al 2014, Wheeland and Rose 2016.…”

Section: Introductionmentioning

confidence: 99%

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Linking species richness and size diversity in birds and fishes

et al. 2018

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The rapid development of mechanistic, trait‐based models has resulted in increasingly reliable predictions of the functional diversity of individuals in populations and communities. However, a focus on individuals’ traits differs from the prevailing focus on species in much of community ecology. We sought to identify correlative links between species richness and size diversity, focusing on size diversity as one component of functional diversity. These links could be used to extend individual, size‐based models to predict patterns of species richness. We used the distribution of the sizes of individuals in a community – the individual–size distribution (ISD) – as a measure of size diversity, and constructed Bayesian regression models with species richness as the response variable and ISDs as the predictor variables. We used two methods to include ISDs in our analyses. First, we summarized the ISD with five common diversity indices and used these indices as predictor variables in our analyses. Second, we used functional data analysis to include the entire ISD (a continuous function) as a predictor variable in our analyses. Analyses of diversity indices identified consistent, positive associations between species richness and size diversity. Analyses of entire ISDs revealed that these associations were driven by numbers of small‐ and medium‐sized individuals. In general, a combination of diversity indices predicted species richness as well as or better than continuous ISDs. However, models with ISDs as predictor variables were less sensitive to technical details of model fitting (e.g. discretization method) than those based on diversity indices, and the use of ISDs avoids the arbitrary selection of one or several diversity indices. Our use of functional data analysis allows any trait distribution to be included as a variable in statistical analyses, and has the potential to reveal new diversity patterns in ecology.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Linking species richness and size diversity in birds and fishes

et al. 2018

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“…Hydroacoustic sampling is a promising alternative, as it tends to be less size selective, more cost effective, and less invasive than traditional catch methods. Wheeland and Rose (2016) explore the potential for hydroacoustics to estimate fish size spectra using Lac Du Bonnet, a reservoir in Manitoba, as a test system. They show that the method is effective when fish are not strongly aggregated and single individual targets are discernible in enough numbers.…”

Section: (I) Size Spectrum As An Indicator Of Ecosystem Structurementioning

confidence: 99%

Size-based approaches to aquatic ecosystems and fisheries science: a symposium in honour of Rob Peters

Giacomini

Shuter

Baum

2016

Can. J. Fish. Aquat. Sci.

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This special issue honours Rob Peters' outstanding contributions to the field of aquatic ecology. It focuses on the size spectrum approach -in which individual organisms, rather than species, are the most basic biological unit -and highlights applications of this approach to fisheries management. The 21 papers in this issue cover three subject areas: (i) the use of size spectra to characterize variation in community structure, (ii) the development of size-based models of ecosystem dynamics to address fisheries questions, and (iii) applications of size-based theory to examine the consequences of variation in predator-prey size relationships, body size -trophic level relationships, and body size -life history relationships. The empirical studies herein demonstrate the utility of size spectra as indicators of population or community structure and for detecting impacts associated with environmental change. Future research focused on refining size-based sampling methods, standardizing metrics and analytical methods, understanding model sensitivity to the underlying assumptions, and comparative studies across ecosystems will enhance our ability to reliably interpret changes in size spectrum characteristics, thus facilitating their use as indicators of ecological change.Résumé : Le présent numéro spécial souligne la contribution exceptionnelle de Rob Peters au domaine de l'écologie aquatique. Il se penche sur l'approche axée sur les spectres de tailles, selon laquelle l'individu, plutôt que l'espèce, constitue l'unité biologique la plus fondamentale, et il présente des applications de cette approche de gestion des pêches. Les vingt et un articles qu'il renferme couvrent trois grands secteurs d'étude, à savoir (i) l'utilisation des spectres de tailles pour caractériser les variations de la structure de communautés, (ii) le développement de modèles basés sur la taille de la dynamique des écosystèmes pour examiner des questions touchant aux ressources halieutiques, et (iii) des applications de la théorie basée sur la taille pour examiner les conséquences des variations des relations de la taille des prédateurs et proies, des relations entre la taille du corps et le niveau trophique et des relations entre la taille du corps et le cycle biologique. Les études empiriques présentées démontrent l'utilité des spectres de tailles comme indicateurs de la structure des populations ou des communautés et pour détecter les impacts associés aux modifications de l'environnement. Des travaux de recherche futurs visant le raffinement des méthodes d'échantillonnage basées sur la taille, la normalisation des paramètres et méthodes analytiques, la compréhension de la sensibilité des modèles aux hypothèses sous-jacentes et des études comparatives de différents écosystèmes accroîtront la capacité d'interpréter de manière fiable les variations des caractéristiques des spectres de tailles, en facilitant ainsi l'utilisation comme indicateurs de changements écologiques. [Traduit par la Rédaction]

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“…Mass-abundance relationships (i.e., the frequency of organisms in binned size categories) have been used to characterise terrestrial, marine and freshwater food-web structure ( Figure 1; Clauset & Erwin, 2008;Cohen, Jonsson, & Carpenter, 2003;Gray et al, 2014;Wheeland & Rose, 2015). The movement of energy and change in biomass over trophic levels usually results in these predictable sizeabundance relationships, which typically follow a right-skewed distribution, with low frequencies of large-bodied organisms and high frequencies of small-bodied taxa (Layman et al, 2005;Petchey & Belgrano, 2010;Trebilco, Baum, Salomon, & Dulvy, 2013).…”

Section: Introductionmentioning

confidence: 99%

Responsiveness of fish mass–abundance relationships and trophic metrics to flood disturbance, stream size, land cover and predator taxa presence in headwater streams

Fraley

Warburton

Jellyman

et al. 2018

Ecology of Freshwater Fish

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Characterisation of food webs, by summarising energy transfer and trophic relationships, allows more functional measurement of ecosystems and may reveal threats (e.g., land-cover change) in sensitive environments that are not obvious from conventional biomonitoring. However, typical methods used to achieve this are timeconsuming and expensive. Therefore, we tested the usefulness of fish-focused food-web proxies as functional measures, specifically mass-abundance relationships of fish assemblages and stable isotope (SI)-derived metrics in headwater stream reaches. These metrics have been trialled before for similar use in other settings, but have yielded varying results, and have not been employed in tandem in temperate freshwaters. Sampling reaches (N = 46) were spread across a variety of streams, and the effects of habitat predictors at multiple scales on metrics were assessed using model selection. We found that habitat size positively correlated with food-chain lengths in streams, possibly because of increased abundance of fish at multiple trophic levels in habitats with more space. Additionally, flood disturbance was negatively associated with fish mass-abundance and carbon range, likely due to the harshness of flood-prone streams. Riparian land-cover variables were correlated with multiple metrics, indicating the importance of terrestrial-aquatic linkages.Additionally, variations in all metrics were influenced by the presence of native, predatory longfin eels. Overall, we conclude that mass-abundance relationships and SIderived metrics are sensitive to drivers of trophic organisation and likely reflect processes occurring at multiple spatial scales in freshwaters. Thus, these metrics could be an insightful monitoring tool for managers because they reflect functional measures of aquatic ecosystems. K E Y W O R D S fish assemblages, habitat relationships, trophic relationships S U PP O RTI N G I N FO R M ATI O N Additional Supporting Information may be found online in the supporting information tab for this article. How to cite this article: Fraley KM, Warburton HJ, Jellyman PG, Kelly D, McIntosh AR. Responsiveness of fish massabundance relationships and trophic metrics to flood disturbance, stream size, land cover and predator taxa presence in headwater streams. Ecol Freshw Fish.

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Acoustic measures of lake community size spectra

Cited by 15 publications

References 53 publications

Linking species richness and size diversity in birds and fishes

Linking species richness and size diversity in birds and fishes

Size-based approaches to aquatic ecosystems and fisheries science: a symposium in honour of Rob Peters

Responsiveness of fish mass–abundance relationships and trophic metrics to flood disturbance, stream size, land cover and predator taxa presence in headwater streams

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