Trait‐based ecology of fishes: A quantitative assessment of literature trends and knowledge gaps using topic modelling

Luiz, Osmar J.; Olden, Julian D.; Kennard, Mark J.; Crook, David A.; Douglas, Michael M.; Saunders, Thor; King, Alison J.

doi:10.1111/faf.12399

Cited by 35 publications

(43 citation statements)

References 46 publications

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“…We build on this knowledge by using categorical traits for fish communities and demonstrating how function‐specific trait space analyses can be used to assess diversity relating to particular functions. Additionally, by incorporating physiological, behavioural and life‐history traits, this research addresses concerns about gaps in the field of trait‐based ecology (Luiz et al., 2019).…”

Section: Discussionmentioning

confidence: 99%

How functionally diverse are fish in the deep? A comparison of fish communities in deep and shallow‐water systems

Carrington

Papa

Beese

et al. 2021

Diversity and Distributions

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Aim Functional diversity metrics inform how species’ traits relate to ecosystem functions, useful for quantifying how exploitation and disturbance impact ecosystems. We compare the functional diversity of entire fish communities in a shallow‐water region with a deep‐sea region for further insight into the differences between these ecosystem types. Location The regions compared in this study were selected to represent a shallow‐water coastal region, Tasman and Golden Bays (TBGB), and a deep‐sea region, Chatham Rise (CR), in New Zealand. Methods Functional diversity was assessed using four metrics: functional richness, evenness, divergence and dispersion. We compared these metrics across four key functions: habitat use, feeding, locomotion and life history. Results Our results showed that overall, the shallow‐water and deep‐sea ecosystems had equal diversity. When focusing on the four ecological functions, the two ecosystems exhibited equal diversity metrics across most analyses. Of the significantly different results, the deep‐sea had higher functional richness for habitat use and locomotion traits, lower functional dispersion for feeding and lower functional evenness for life history. Main conclusions Differences across the functions highlight higher diversity of habitat utilization by deep‐sea fish, while lower diversity in feeding suggests deep‐sea fish tend towards generalist diets, likely driven by low food availability. Deep‐sea fish displayed an increased range of locomotive traits in our analyses, but this conflicts with existing evidence and warrants further study. Life‐history results suggest deep‐sea fish exhibit higher clustering of traits, indicating potential under‐utilization of life‐history strategies in the deep‐sea. Our results demonstrate that although deep‐sea fish communities have similar levels of diversity to shallow‐water communities, the traits that structure this diversity differ, and therefore, the systems may respond to exploitation differently.

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Section: Discussionmentioning

confidence: 99%

How functionally diverse are fish in the deep? A comparison of fish communities in deep and shallow‐water systems

Carrington

Papa

Beese

et al. 2021

Diversity and Distributions

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“…Therefore, some epithets used in research surrounding non-perennial systems are also used for different fields beyond describing water flow in lotic ecosystems. While these papers could be related to non-perennial systems, the number of papers in our search results were too many to thoroughly examine as has been done in other LDA analyses [ 34 ]. This highlights the need for specific titles and keywords to ensure related papers appear in WoS searches.…”

Section: Discussionmentioning

confidence: 99%

What’s in a Name? Patterns, Trends, and Suggestions for Defining Non-Perennial Rivers and Streams

Busch

Costigan

Fritz

et al. 2020

Water

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Rivers that cease to flow are globally prevalent. Although many epithets have been used for these rivers, a consensus on terminology has not yet been reached. Doing so would facilitate a marked increase in interdisciplinary interest as well as critical need for clear regulations. Here we reviewed literature from Web of Science database searches of 12 epithets to learn (Objective 1—O1) if epithet topics are consistent across Web of Science categories using latent Dirichlet allocation topic modeling. We also analyzed publication rates and topics over time to (O2) assess changes in epithet use. We compiled literature definitions to (O3) identify how epithets have been delineated and, lastly, suggest universal terms and definitions. We found a lack of consensus in epithet use between and among various fields. We also found that epithet usage has changed over time, as research focus has shifted from description to modeling. We conclude that multiple epithets are redundant. We offer specific definitions for three epithets (non-perennial, intermittent, and ephemeral) to guide consensus on epithet use. Limiting the number of epithets used in non-perennial river research can facilitate more effective communication among research fields and provide clear guidelines for writing regulatory documents.

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“…We acknowledge that the ecomorphological approach used to represent the functional attributes of stream fish assemblages has limitations (Luiz et al., 2019). The inclusion of hard traits, such as trophic preferences and fish reproductive attributes may allow a better understanding of the effects of climate change over time.…”

Section: Discussionmentioning

confidence: 99%

Temporal changes in rainfall affect taxonomic and functional composition of stream fish assemblages in central Amazonia

et al. 2020

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Climate change is a major threat to biodiversity. Rainfall patterns over recent decades have changed and extreme events are intensifying. These are expected to affect the hydrological dynamics and structure of forest streams in the Amazon basin, which strongly depend on the local rainfall regime, with potential consequences for local fish assemblages. Here we used four repeated surveys of stream fish assemblages across 10 × 10 km area of a pristine forest reserve in central Amazonia over an 18‐year (2001–2018) period to investigate the temporal dynamics of fish taxonomic and functional composition in relation to changes in stream habitats and local climatic regime. We investigated changes in magnitude, direction, and congruence of fish assemblage trajectories over time. Total annual rainfall increased over time, with stormy days (i.e. daily rainfall above 20 mm) becoming more frequent during recent decades and a concomitant change of stream substrates from litter‐dominated to free sand. The overall taxonomic and functional composition of fish assemblages changed consistently over time, with stronger differences between the first and last surveys due to alterations in relative abundances of some of the most abundant species. Functional composition moved from open water species (compressed‐bodied species with less developed fins and terminal‐oriented mouths) to species adapted to lateral pools and shallow marginal areas (species with fusiform body shape, more developed fins, and superior‐oriented mouth) We provide evidence of a concerted directional change of fish assemblages associated with increased precipitation and a higher frequency of stormy days over the last 2 decades. Considering the short time interval and the subtleness of the climatic changes assessed in this study, as well as the historically assumed structural stability of Amazonian streams, these findings are surprising and indicate those stream fish assemblages may respond quickly to climate changes.

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Trait‐based ecology of fishes: A quantitative assessment of literature trends and knowledge gaps using topic modelling

Cited by 35 publications

References 46 publications

How functionally diverse are fish in the deep? A comparison of fish communities in deep and shallow‐water systems

How functionally diverse are fish in the deep? A comparison of fish communities in deep and shallow‐water systems

What’s in a Name? Patterns, Trends, and Suggestions for Defining Non-Perennial Rivers and Streams

Temporal changes in rainfall affect taxonomic and functional composition of stream fish assemblages in central Amazonia

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