Marine fish traits follow fast-slow continuum across oceans

Beukhof, Esther; Frelat, Romain; Pécuchet, Laurène; Maureaud, Aurore; Dencker, Tim Spaanheden; Sólmundsson, Jón; Punzón, Antonio; Primicerio, Raul; Hidalgo, Manuel; Möllmann, Christian; Lindegren, Martin

doi:10.1038/s41598-019-53998-2

Cited by 51 publications

(50 citation statements)

References 54 publications

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“…Previous studies suggest that changes in these trophodynamic processes are caused by changes in species assemblages induced by the increase in sea water temperature (Gascuel et al, 2008; Maureaud et al, 2017; du Pontavice et al, 2019). Hence biomass transfers tend to be faster but less efficient at each TL in warmer waters (Gascuel et al, 2008; du Pontavice et al, 2019) due to species assemblages more and more dominated by fast‐growing, short‐living, early‐maturing species as suggested by Beukhof et al, (2019).…”

Section: Discussionmentioning

confidence: 99%

Climate‐induced decrease in biomass flow in marine food webs may severely affect predators and ecosystem production

Pontavice

Gascuel

Reygondeau

et al. 2021

Global Change Biology

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Climate change impacts on marine life in the world ocean are expected to accelerate over the 21st century, affecting the structure and functioning of food webs. We analyzed a key aspect of this issue, focusing on the impact of changes in biomass flow within marine food webs and the resulting effects on ecosystem biomass and production. We used a modeling framework based on a parsimonious quasi‐physical representation of biomass flow through the food web, to explore the future of marine consumer biomass and production at the global scale over the 21st century. Biomass flow is determined by three climate‐related factors: primary production entering the food web, trophic transfer efficiency describing losses in biomass transfers from one trophic level (TL) to the next, and flow kinetic measuring the speed of biomass transfers within the food web. Using climate projections of three earth system models, we calculated biomass and production at each TL on a 1° latitude ×1° longitude grid of the global ocean under two greenhouse gas emission scenarios. We show that the alterations of the trophic functioning of marine ecosystems, mainly driven by faster and less efficient biomass transfers and decreasing primary production, would lead to a projected decline in total consumer biomass by 18.5% by 2090–2099 relative to 1986–2005 under the “no mitigation policy” scenario. The projected decrease in transfer efficiency is expected to amplify impacts at higher TLs, leading to a 21.3% decrease in abundance of predators and thus to a change in the overall trophic structure of marine ecosystems. Marine animal production is also projected to decline but to a lesser extent than biomass. Our study highlights that the temporal and spatial projected changes in biomass and production would imply direct repercussions on the future of world fisheries and beyond all services provided by Ocean.

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Section: Discussionmentioning

confidence: 99%

Climate‐induced decrease in biomass flow in marine food webs may severely affect predators and ecosystem production

Pontavice

Gascuel

Reygondeau

et al. 2021

Global Change Biology

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“…Correlated traits can be identified through multivariate ordination techniques. For example, Beukhof et al (2019) demonstrate how traits positioned in close proximity in a PCA of trait-space (e.g., length and fecundity) follow similar temporal trends when exposed to environmental disturbances.…”

Section: Identify Overlapping or Correlated Response And Effect Traitsmentioning

confidence: 99%

Response and Effect Traits of Coral Reef Fish

2021

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The response-and-effect framework is a trait-based approach that seeks to break down the mechanistic links between ecosystem disturbances, species' traits, and ecosystem processes. We apply this framework to a review of the literature on coral reef fish traits, in order to illustrate the research landscape and structure a path forward for the field. Traits were categorized into five broad groupings: behavioral, life history, morphological, diet, and physiological. Overall, there are fewer studies linking effect traits to ecosystem processes (number of papers on herbivory, n = 14; predation, n = 12; bioerosion, n = 2; nutrient cycling, n = 0) than there are linking response traits to disturbances (climate change, n = 26; fishing, n = 20; pollution, n = 4). Through a network analysis, we show that the size and diet of fish are two of the most common response and effect traits currently used in the literature, central to studies on both ecosystem disturbances and processes. Behavioral and life history traits are more commonly shown to respond to disturbances, while morphological traits tend to be used in capturing ecosystem processes. Pearson correlation coefficients quantifying the strength of the relationships between the most commonly studied process, herbivory, and key effect traits (size, gregariousness, and diel activity) are provided. We find that the most popular cluster of traits used in functional diversity metrics (e.g., functional richness, functional dispersion) is comprised of size, diet, space use/position in the water column, diel activity, gregariousness, and mobility, which encompass three of the broad trait categories. Our assessment of the literature highlights that more research is needed to support an evidence-based selection of traits to understand and predict ecosystem functioning. In synthesizing the literature, we identify research gaps and provide an avenue toward a more robust trait-selection process.

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“…Scientific bottom trawl surveys have been conducted in many countries in continental waters—sampling demersal fishery resources on continental shelves and slopes. They have formed the backbone of information supporting research on marine fish communities in response to climate change and variability across ecosystems and over large spatial scales (Beukhof et al., 2019; Branch et al., 2010; Gislason et al., 2020; Pecuchet et al., 2017; Pinsky et al., 2013; Shin et al., 2005), as well as meta‐analysis across taxonomic groups and biomes (Antão et al., 2020; Burrows et al., 2019; Lenoir et al., 2020). However, a single bottom trawl survey (henceforth survey) is typically carried out nationally, regionally or within a delimited management zone (but this is not the case for some of the European surveys).…”

Section: Global Availability Of Trawl Survey Datamentioning

confidence: 99%

“…The survey metadata built on knowledge of existing survey collections (https://datras.ices.dk/, https://oceanadapt.rutgers.edu/, https://james-thorson.shinyapps.io/FishViz/) and studies using aggregated surveys (Beukhof et al., 2019; Branch et al., 2010; Gislason et al., 2020; Pecuchet et al., 2017; Pinsky et al., 2013; Trenkel et al., 2019). We sent a standardized query to established and identified contacts of surveys from national fisheries institutes, particularly where geographical gaps were identified (South America, Africa, Asia, and Oceania).…”

Section: Global Availability Of Trawl Survey Datamentioning

confidence: 99%

Are we ready to track climate‐driven shifts in marine species across international boundaries? ‐ A global survey of scientific bottom trawl data

Maureaud

Frelat

Pécuchet

et al. 2020

Global Change Biology

Self Cite

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Marine biota are redistributing at a rapid pace in response to climate change and shifting seascapes. While changes in fish populations and community structure threaten the sustainability of fisheries, our capacity to adapt by tracking and projecting marine species remains a challenge due to data discontinuities in biological observations, lack of data availability, and mismatch between data and real species distributions. To assess the extent of this challenge, we review the global status and accessibility of ongoing scientific bottom trawl surveys. In total, we gathered metadata for 283,925 samples from 95 surveys conducted regularly from 2001 to 2019. We identified that 59% of the metadata collected are not publicly available, highlighting that the availability of data is the most important challenge to assess species redistributions under global climate change. Given that the primary purpose of surveys is to provide independent data to inform stock assessment of commercially important populations, we further highlight that single surveys do not cover the full range of the main commercial demersal fish species. An average of 18 surveys is needed to cover at least 50% of species ranges, demonstrating the importance of combining multiple surveys to evaluate species range shifts. We assess the potential for combining surveys to track transboundary species redistributions and show that differences in sampling schemes and inconsistency in sampling can be overcome with spatio‐temporal modeling to follow species density redistributions. In light of our global assessment, we establish a framework for improving the management and conservation of transboundary and migrating marine demersal species. We provide directions to improve data availability and encourage countries to share survey data, to assess species vulnerabilities, and to support management adaptation in a time of climate‐driven ocean changes.

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Marine fish traits follow fast-slow continuum across oceans

Cited by 51 publications

References 54 publications

Climate‐induced decrease in biomass flow in marine food webs may severely affect predators and ecosystem production

Climate‐induced decrease in biomass flow in marine food webs may severely affect predators and ecosystem production

Response and Effect Traits of Coral Reef Fish

Are we ready to track climate‐driven shifts in marine species across international boundaries? ‐ A global survey of scientific bottom trawl data

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