1
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Sasaki M, Kingsbury KM, Booth DJ, Nagelkerken I. Body size mediates trophic interaction strength of novel fish assemblages under climate change. J Anim Ecol 2024. [PMID: 38644583 DOI: 10.1111/1365-2656.14079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 02/07/2024] [Indexed: 04/23/2024]
Abstract
Ecological similarity plays an important role in biotic interactions. Increased body size similarity of competing species, for example, increases the strength of their biotic interactions. Body sizes of many exothermic species are forecast to be altered under global warming, mediating shifts in existing trophic interactions among species, in particular for species with different thermal niches. Temperate rocky reefs along the southeast coast of Australia are located in a climate warming hotspot and now house a mixture of temperate native fish species and poleward range-extending tropical fishes (vagrants), creating novel species assemblages. Here, we studied the relationship between body size similarity and trophic overlap between individual temperate native and tropical vagrant fishes. Dietary niche overlap between vagrant and native fish species increased as their body sizes converged, based on both stomach content composition (short-term diet), stable isotope analyses (integrated long-term diet) and similarity in consumed prey sizes. We conclude that the warming-induced faster growth rates of tropical range-extending fish species at their cool water ranges will continue to converge their body size towards and strengthen their degree of trophic interactions and dietary overlap with co-occurring native temperate species under increasing ocean warming. The strengthening of these novel competitive interactions is likely to drive changes to temperate food web structures and reshuffle existing species community structures.
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Affiliation(s)
- Minami Sasaki
- Southern Seas Ecology Laboratories, School of Biological Sciences, The University of Adelaide, Adelaide, South Australia, Australia
| | - Kelsey M Kingsbury
- Southern Seas Ecology Laboratories, School of Biological Sciences, The University of Adelaide, Adelaide, South Australia, Australia
| | - David J Booth
- Fish Ecology Lab, Faculty of Science, University of Technology Sydney, Sydney, New South Wales, Australia
| | - Ivan Nagelkerken
- Southern Seas Ecology Laboratories, School of Biological Sciences, The University of Adelaide, Adelaide, South Australia, Australia
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2
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Zarzyczny KM, Rius M, Williams ST, Fenberg PB. The ecological and evolutionary consequences of tropicalisation. Trends Ecol Evol 2024; 39:267-279. [PMID: 38030539 DOI: 10.1016/j.tree.2023.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 10/12/2023] [Accepted: 10/13/2023] [Indexed: 12/01/2023]
Abstract
Tropicalisation is a marine phenomenon arising from contemporary climate change, and is characterised by the range expansion of tropical/subtropical species and the retraction of temperate species. Tropicalisation occurs globally and can be detected in both tropical/temperate transition zones and temperate regions. The ecological consequences of tropicalisation range from single-species impacts (e.g., altered behaviour) to whole ecosystem changes (e.g., phase shifts in intertidal and subtidal habitats). Our understanding of the evolutionary consequences of tropicalisation is limited, but emerging evidence suggests that tropicalisation could induce phenotypic change as well as shifts in the genotypic composition of both expanding and retracting species. Given the rapid rate of contemporary climate change, research on tropicalisation focusing on shifts in ecosystem functioning, biodiversity change, and socioeconomic impacts is urgently needed.
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Affiliation(s)
- Karolina M Zarzyczny
- School of Ocean and Earth Science, National Oceanography Centre, University of Southampton, Southampton SO14 3ZH, UK; Natural History Museum, Cromwell Road, London SW7 5BD, UK.
| | - Marc Rius
- Centre for Advanced Studies of Blanes (CEAB), Consejo Superior de Investigaciones Científicas (CSIC), Accés a la Cala Sant Francesc 14, Blanes 17300, Spain; Department of Zoology, Centre for Ecological Genomics and Wildlife Conservation, University of Johannesburg, Auckland Park, 2006 Johannesburg, South Africa
| | | | - Phillip B Fenberg
- School of Ocean and Earth Science, National Oceanography Centre, University of Southampton, Southampton SO14 3ZH, UK; Natural History Museum, Cromwell Road, London SW7 5BD, UK
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3
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Rigg AL, Bellotto C, Fowler AM, Booth DJ. Staining protocols affect use of otolith to estimate the demography of the damselfish sergeant major (Abudefduf vaigiensis). JOURNAL OF FISH BIOLOGY 2024; 104:878-882. [PMID: 37903718 DOI: 10.1111/jfb.15601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 10/03/2023] [Accepted: 10/26/2023] [Indexed: 11/01/2023]
Abstract
This study assessed the otolith (sagittae, lapilli, and asterisci) increment deposition rate in the range-shifting damselfish, A. vaigiensis, using different concentrations of Alizain Red S and evaluated the impact of staining on increment width. Daily increment deposition was verified in all otolith types and presented clearer fluorescent markings in the lapilli and sagittae than the asterisci, with high stain concentration showing the best clarity. Higher stain concentrations were found to decrease increment width, suggesting care is needed when using stained otoliths as a proxy for growth for this species.
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Affiliation(s)
- Alexander L Rigg
- Fish Ecology Lab, School of Life Sciences, University of Technology Sydney, Sydney, New South Wales, Australia
| | - Clara Bellotto
- Fish Ecology Lab, School of Life Sciences, University of Technology Sydney, Sydney, New South Wales, Australia
| | - Ashley M Fowler
- New South Wales Department of Primary Industries, Sydney Institute of Marine Science, Sydney, New South Wales, Australia
| | - David J Booth
- Fish Ecology Lab, School of Life Sciences, University of Technology Sydney, Sydney, New South Wales, Australia
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4
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Zhang J, Cai Y, Li J, Zhang K, Gong Y, Chen S, Chen Z. Changes in population biology of three coral reef fishes in the South China Sea between 1998–1999 and 2016–2019. FRONTIERS IN CONSERVATION SCIENCE 2023. [DOI: 10.3389/fcosc.2023.1129266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Abstract
The decline of coral reefs and their fish has attracted worldwide attention. The South China Sea is the important center of coral reefs. Reef-fish is a crucial component in coral reef ecosystem. However, studies on the long-term variation in the biololgy of coral reef fish in the South China Sea are very lacking. To enhance our understanding of variation in reef fish biology in the South China Sea, we investigated long-term changes in some biological indicators of three dominant coral reef fishes (Lutjanus kasmira, Gnathodentex aureolineatus, and Cephalopholis urodeta) at the Yongshu Reef of the South China Sea between 1998–1999 and 2016–2019, and examined the effects of fishing and sea surface temperature on their biology. Compared with 1998–1999, average body length, average body mass, large fish indicator, feeding level and relative fatness of Lutjanus kasmira and Gnathodentex aureolineatus decreased in 2016–2019, but Cephalopholis urodeta did not. The relative fatness was positively correlated with the feeding level, which indicated that the decline of feeding level decreased the relative fatness. Fishing had the most important negative impact on biological changes. In the past two decades, Lutjanus kasmira had the most obvious decline in size and relative fatness, followed by Gnathodentex aureolineatus, but Cephalopholis urodeta had almost no decline. We hypothesized that different coral reef fishes have different abilities to maintain population stability under external pressures, and the differences in vulnerability of three fish species were the main reasons for their different responses to external pressures. To promote the conservation of coral reef fish, we recommend taking rigorous management to protect habitat.
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5
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Karametsidis G, Rueda L, Bellido JM, Esteban A, García E, Gil de Sola L, Pennino MG, Pérez-Gil JL, Hidalgo M. The trade-off between condition and growth shapes juveniles' survival of harvested demersal fish of the Mediterranean sea. MARINE ENVIRONMENTAL RESEARCH 2023; 184:105844. [PMID: 36603343 DOI: 10.1016/j.marenvres.2022.105844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 12/02/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
Fish body condition and growth are two interrelated traits closely associated with species life history and fitness, whose trade-off can ultimately impact population dynamics albeit seldom empirically demonstrated. They can intricately affect survival rates, which are particularly relevant for species under exploitation. Using individual spatiotemporal information in Northwestern Mediterranean, we document for the first time the existence of a trade-off between condition and growth in regulating survival dynamics in two important fish species for the Mediterranean fisheries that are characterized by contrasting life histories. For the European hake (Merluccius merluccius), a benthopelagic species, juveniles' body condition was detected to be positively linked to survival and negatively associated with the growth of this age group. For the red mullet (Mullus barbatus), the same pattern was observed for young adults. We also show that the observed patterns on a regional level have a clear spatial dependence as we found that observed body condition over a local scale had a broad effect on the population dynamics of the whole region, with the Ebro delta area emerging as the demographic engine of the two species. We discuss our results in the context of fisheries management and underline the importance of improving current stock assessment models and spatially based fishery management towards incorporating body condition and growth due to their influence on important parameters such as survival.
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Affiliation(s)
- Georgios Karametsidis
- University of the Balearic Islands, Carretera de Valldemossa, km 7.5, 07122, Palma, Balearic Islands, Spain; Centro Oceanográfico de Baleares (IEO, CSIC), Ecosystem Oceanography Group (GRECO), Moll de Ponet sn, 07190, Palma, Balearic Islands, Spain; Uppsala University, Department of Ecology and Genetics, Uppsala, 75105, Sweden.
| | - Lucía Rueda
- Centro Oceanográfico de Málaga (IEO, CSIC), Muelle Pesquero s/n, 29640, Fuengirola, Málaga, Spain
| | - José M Bellido
- Centro Oceanográfico de Murcia (IEO, CSIC), Varadero 1, 30740, San Pedro del Pinar, Murcia, Spain
| | - Antonio Esteban
- Centro Oceanográfico de Murcia (IEO, CSIC), Varadero 1, 30740, San Pedro del Pinar, Murcia, Spain
| | - Encarnación García
- Centro Oceanográfico de Murcia (IEO, CSIC), Varadero 1, 30740, San Pedro del Pinar, Murcia, Spain
| | - Luís Gil de Sola
- Centro Oceanográfico de Málaga (IEO, CSIC), Muelle Pesquero s/n, 29640, Fuengirola, Málaga, Spain
| | - Maria Grazia Pennino
- Centro Oceanográfico de Vigo (IEO, CSIC), Subida a Radio Faro, 50-52, 36390, Vigo Pontevedra, Spain
| | - José Luís Pérez-Gil
- Centro Oceanográfico de Málaga (IEO, CSIC), Muelle Pesquero s/n, 29640, Fuengirola, Málaga, Spain
| | - Manuel Hidalgo
- Centro Oceanográfico de Baleares (IEO, CSIC), Ecosystem Oceanography Group (GRECO), Moll de Ponet sn, 07190, Palma, Balearic Islands, Spain
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6
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Anderson MJ, Walsh DCI, Sweatman WL, Punnett AJ. Non-linear models of species' responses to environmental and spatial gradients. Ecol Lett 2022; 25:2739-2752. [PMID: 36269686 PMCID: PMC9828393 DOI: 10.1111/ele.14121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 09/12/2022] [Accepted: 09/16/2022] [Indexed: 01/12/2023]
Abstract
Species' responses to broad-scale environmental or spatial gradients are typically unimodal. Current models of species' responses along gradients tend to be overly simplistic (e.g., linear, quadratic or Gaussian GLMs), or are suitably flexible (e.g., splines, GAMs) but lack direct ecologically interpretable parameters. We describe a parametric framework for species-environment non-linear modelling ('senlm'). The framework has two components: (i) a non-linear parametric mathematical function to model the mean species response along a gradient that allows asymmetry, flattening/peakedness or bimodality; and (ii) a statistical error distribution tailored for ecological data types, allowing intrinsic mean-variance relationships and zero-inflation. We demonstrate the utility of this model framework, highlighting the flexibility of a range of possible mean functions and a broad range of potential error distributions, in analyses of fish species' abundances along a depth gradient, and how they change over time and at different latitudes.
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Affiliation(s)
- Marti J. Anderson
- New Zealand Institute for Advanced Study (NZIAS)Massey UniversityAucklandNew Zealand,PRIMER‐e (Quest Research Limited)AucklandNew Zealand
| | | | - Winston L. Sweatman
- School of Mathematical and Computational SciencesMassey UniversityAucklandNew Zealand
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7
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Zhu W, Zhao C, Zhao T, Chang L, Chen Q, Liu J, Li C, Xie F, Jiang J. Rising floor and dropping ceiling: organ heterogeneity in response to cold acclimation of the largest extant amphibian. Proc Biol Sci 2022; 289:20221394. [PMID: 36196548 PMCID: PMC9532983 DOI: 10.1098/rspb.2022.1394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Low temperature imposes strong selective pressure on ectotherms. To maximize their overall fitness under cold conditions, the ectotherms may either try to maintain their physiological activities through metabolic compensation or enter into metabolic depression; however, some species adopt both strategies to cope with different degrees of cold. Nevertheless, how these two seemingly opposite strategies are coordinated has rarely been elucidated. Here, we investigated the molecular strategy underlying the cold acclimation of Andrias davidianus, the largest extant amphibian, using multi-organ metabolomics and transcriptomics. The results showed remarkable organ heterogeneity in response to cold. While most organs showed transcriptional upregulation of metabolic processes, the heart exhibited downregulation. This heterogeneity explained the adaptive reorganization in resource allocation, which compensates for metabolic maintenance by compromising growth. Importantly, the cardiac function might constitute a ‘ceiling’ to constrain the space for compensation, especially under colder conditions. Additionally, the opposite transcriptional regulation of oxidative phosphorylation and other pathways might also shape the overall metabolic capacity under cold conditions. The heterogeneity in cold responses may have directed a shift in cold adaptive strategy from compensation to depression with a drop in temperature. These results provide a novel insight into the regulatory mechanisms underlying cold survival strategies of ectotherms.
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Affiliation(s)
- Wei Zhu
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chendgu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Chunlin Zhao
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chendgu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China
| | - Tian Zhao
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chendgu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China
| | - Liming Chang
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chendgu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Qiheng Chen
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chendgu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jiongyu Liu
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chendgu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China
| | - Cheng Li
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chendgu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China
| | - Feng Xie
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chendgu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China
| | - Jianping Jiang
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chendgu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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8
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Spinks RK, Donelson JM, Bonzi LC, Ravasi T, Munday PL. Parents exposed to warming produce offspring lower in weight and condition. Ecol Evol 2022; 12:e9044. [PMID: 35866024 PMCID: PMC9288889 DOI: 10.1002/ece3.9044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 05/24/2022] [Accepted: 05/27/2022] [Indexed: 11/16/2022] Open
Abstract
The parental environment can alter offspring phenotypes via the transfer of non‐genetic information. Parental effects may be viewed as an extension of (within‐generation) phenotypic plasticity. Smaller size, poorer physical condition, and skewed sex ratios are common responses of organisms to global warming, yet whether parental effects alleviate, exacerbate, or have no impact on these responses has not been widely tested. Further, the relative non‐genetic influence of mothers and fathers and ontogenetic timing of parental exposure to warming on offspring phenotypes is poorly understood. Here, we tested how maternal, paternal, and biparental exposure of a coral reef fish (Acanthochromis polyacanthus) to elevated temperature (+1.5°C) at different ontogenetic stages (development vs reproduction) influences offspring length, weight, condition, and sex. Fish were reared across two generations in present‐day and projected ocean warming in a full factorial design. As expected, offspring of parents exposed to present‐day control temperature that were reared in warmer water were shorter than their siblings reared in control temperature; however, within‐generation plasticity allowed maintenance of weight, resulting in a higher body condition. Parental exposure to warming, irrespective of ontogenetic timing and sex, resulted in decreased weight and condition in all offspring rearing temperatures. By contrast, offspring sex ratios were not strongly influenced by their rearing temperature or that of their parents. Together, our results reveal that phenotypic plasticity may help coral reef fishes maintain performance in a warm ocean within a generation, but could exacerbate the negative effects of warming between generations, regardless of when mothers and fathers are exposed to warming. Alternatively, the multigenerational impact on offspring weight and condition may be a necessary cost to adapt metabolism to increasing temperatures. This research highlights the importance of examining phenotypic plasticity within and between generations across a range of traits to accurately predict how organisms will respond to climate change.
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Affiliation(s)
- Rachel K Spinks
- ARC Centre of Excellence for Coral Reef Studies James Cook University Townsville Queensland Australia
| | - Jennifer M Donelson
- ARC Centre of Excellence for Coral Reef Studies James Cook University Townsville Queensland Australia
| | - Lucrezia C Bonzi
- Division of Biological and Environmental Sciences and Engineering, Red Sea Research Center King Abdullah University of Science and Technology Thuwal Saudi Arabia
| | - Timothy Ravasi
- ARC Centre of Excellence for Coral Reef Studies James Cook University Townsville Queensland Australia.,Marine Climate Change Unit Okinawa Institute of Science and Technology Graduate University Onna Japan
| | - Philip L Munday
- ARC Centre of Excellence for Coral Reef Studies James Cook University Townsville Queensland Australia
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9
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Coni EOC, Booth DJ, Nagelkerken I. Coral-reef fishes can become more risk-averse at their poleward range limits. Proc Biol Sci 2022; 289:20212676. [PMID: 35317673 PMCID: PMC8941391 DOI: 10.1098/rspb.2021.2676] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
As climate warms, tropical species are expanding their distribution to temperate ecosystems where they are confronted with novel predators and habitats. Predation strongly regulates ecological communities, and range-extending species that adopt an effective antipredator strategy have a higher likelihood to persist in non-native environments. Here, we test this hypothesis by comparing various proxies of antipredator and other fitness-related behaviours between range-extending tropical fishes and native-temperate fishes at multiple sites across a 730 km latitudinal range. Although some behavioural proxies of risk aversion remained unaltered for individual tropical fish species, in general they became more risk-averse (increased sheltering and/or flight initiation distance), and their activity level decreased poleward. Nevertheless, they did not experience a decline in body condition or feeding rate in their temperate ranges. Temperate fishes did not show a consistently altered pattern in their behaviours across range locations, even though one species increased its flight initiation distance at the warm-temperate location and another one had lowest activity levels at the coldest range location. The maintenance of feeding and bite rate combined with a decreased activity level and increased sheltering may be behavioural strategies adopted by range-extending tropical fishes, to preserve energy and maintain fitness in their novel temperate ecosystems.
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Affiliation(s)
- Ericka O C Coni
- Southern Seas Ecology Laboratories, School of Biological Sciences, and The Environment Institute, The University of Adelaide, Adelaide, SA 5005, Australia
| | - David J Booth
- Fish Ecology Lab, School of Life Sciences, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Ivan Nagelkerken
- Southern Seas Ecology Laboratories, School of Biological Sciences, and The Environment Institute, The University of Adelaide, Adelaide, SA 5005, Australia
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10
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Rocha BS, García-Berthou E, Novaes JLC, Bini LM, Cianciaruso MV. Interspecific synchrony is related to body-length similarity in a fish community under prolonged drought conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 781:146721. [PMID: 33794464 DOI: 10.1016/j.scitotenv.2021.146721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 03/15/2021] [Accepted: 03/20/2021] [Indexed: 06/12/2023]
Abstract
Interspecific synchrony and trait-based differences between species are likely to be related to each other. Therefore, we investigated interspecific synchrony patterns in a fish community under prolonged drought conditions, using a trait-based approach. We hypothesized that trait-similarity would predict interspecific synchrony among fish populations. We also expected that a general synchronous pattern for the whole community would be high during a severe drought context, indicating low stability. The study was conducted in a semi-arid reservoir between 2010 and 2017, which encompassed a five-year period of severe drought. We considered species differences in body length, gonadosomatic index, relative condition factor, and trophic level and found that interspecific synchrony was negatively related to species differences in body length. This result can be related to species requirements in terms of habitats and food resources. We also found a significant level of community-wide synchrony, with important implications for community stability during periods of prolonged drought. In conclusion, our results indicated a strong effect of environmental filtering in fish population dynamics over time. We highlight the importance of a trait-based approach to shed light on understanding ecological processes driving population dynamics.
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Affiliation(s)
- Barbbara Silva Rocha
- Departamento de Ecologia, Universidade Federal de Goiás, UFG, Campus Samambaia, 74001-970 Goiânia, Goiás, Brazil.
| | - Emili García-Berthou
- GRECO, Institute of Aquatic Ecology, University of Girona, 17003 Girona, Catalonia, Spain
| | - José Luís Costa Novaes
- Centro de Ciências Biológicas e da Saúde, Universidade Federal Rural do Semi-Árido, UFERSA, Av. Francisco Mota, SN, Bairro Costa e Silva, 59625-900, Mossoró, RN, Brazil. Bairro Costa e Silva, 59625-900, Mossoró, RN, Brazil
| | - Luis Mauricio Bini
- Departamento de Ecologia, Universidade Federal de Goiás, UFG, Campus Samambaia, 74001-970 Goiânia, Goiás, Brazil
| | - Marcus Vinicius Cianciaruso
- Departamento de Ecologia, Universidade Federal de Goiás, UFG, Campus Samambaia, 74001-970 Goiânia, Goiás, Brazil
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11
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Kingsbury KM, Gillanders BM, Booth DJ, Nagelkerken I. Trophic niche segregation allows range-extending coral reef fishes to co-exist with temperate species under climate change. GLOBAL CHANGE BIOLOGY 2020; 26:721-733. [PMID: 31846164 DOI: 10.1111/gcb.14898] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 09/23/2019] [Accepted: 10/17/2019] [Indexed: 06/10/2023]
Abstract
Changing climate is forcing many terrestrial and marine species to extend their ranges poleward to stay within the bounds of their thermal tolerances. However, when such species enter higher latitude ecosystems, they engage in novel interactions with local species, such as altered predator-prey dynamics and competition for food. Here, we evaluate the trophic overlap between range-extending and local fish species along the east coast of temperate Australia, a hotspot for ocean warming and species range extensions. Stable isotope ratios (δ15 N and δ13 C) of muscle tissue and stomach content analysis were used to quantify overlap of trophic niche space between vagrant tropical and local temperate fish communities along a 730 km (6°) latitudinal gradient. Our study shows that in recipient temperate ecosystems, sympatric tropical and temperate species do not overlap significantly in their diet-even though they forage on broadly similar prey groups-and are therefore unlikely to compete for trophic niche space. The tropical and temperate species we studied, which are commonly found in shallow-water coastal environments, exhibited moderately broad niche breadths and local-scale dietary plasticity, indicating trophic generalism. We posit that because these species are generalists, they can co-exist under current climate change, facilitating the existence of novel community structures.
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Affiliation(s)
- Kelsey M Kingsbury
- Southern Seas Ecology Laboratories, School of Biological Sciences, and The Environment Institute, The University of Adelaide, Adelaide, SA, Australia
| | - Bronwyn M Gillanders
- Southern Seas Ecology Laboratories, School of Biological Sciences, and The Environment Institute, The University of Adelaide, Adelaide, SA, Australia
| | - David J Booth
- Fish Ecology Lab, School of Life Sciences, University of Technology Sydney, Ultimo, NSW, Australia
| | - Ivan Nagelkerken
- Southern Seas Ecology Laboratories, School of Biological Sciences, and The Environment Institute, The University of Adelaide, Adelaide, SA, Australia
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