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Britton JR. Contemporary perspectives on the ecological impacts of invasive freshwater fishes. JOURNAL OF FISH BIOLOGY 2023; 103:752-764. [PMID: 36207758 DOI: 10.1111/jfb.15240] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
Introductions of non-native freshwater fish continue to increase globally, although only a small proportion of these introductions will result in an invasion. These invasive populations can cause ecological impacts in the receiving ecosystem through processes including increased competition and predation pressure, genetic introgression and the transmission of non-native pathogens. Definitions of ecological impact emphasize that shifts in the strength of these processes are insufficient for characterizing impact alone and, instead, must be associated with a quantifiable decline of biological and/or genetic diversity and lead to a measurable loss of diversity or change in ecosystem functioning. Assessments of ecological impact should thus consider the multiple processes and effects that potentially occur from invasive fish populations where, for example, impacts of invasive common carp Cyprinus carpio populations are through a combination of bottom-up and top-down processes that, in entirety, cause shifts in lake stable states and decreased species richness and/or abundances in the biotic communities. Such far-reaching ecological impacts also align to contemporary definitions of ecosystem collapse, given they involve substantial and persistent declines in biodiversity and ecosystem functions that cannot be recovered unaided. Thus, while not all introduced freshwater fishes will become invasive, those species that do develop invasive populations can cause substantial ecological impacts, where some of the impacts on biodiversity and ecosystem functioning might be sufficiently harmful to be considered as contributing to ecosystem collapse.
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Affiliation(s)
- John Robert Britton
- Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Poole, UK
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Vanessa DS, Davide C, Ilaria B, Chiara B, Stefano B, Mattia I, Silvia Z, Pietro V. Non-native fish assemblages display potential competitive advantages in two protected small and shallow lakes of northern Italy. Glob Ecol Conserv 2022. [DOI: 10.1016/j.gecco.2022.e02082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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3
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Inferring the trophic attributes and consequences of co-occurring lake invaders using an allometric niche model. Biol Invasions 2022. [DOI: 10.1007/s10530-022-02745-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Dickey JWE, Cuthbert RN, South J, Britton JR, Caffrey J, Chang X, Crane K, Coughlan NE, Fadaei E, Farnsworth KD, Ismar-Rebitz SMH, Joyce PWS, Julius M, Laverty C, Lucy FE, MacIsaac HJ, McCard M, McGlade CLO, Reid N, Ricciardi A, Wasserman RJ, Weyl OLF, Dick JTA. On the RIP: using Relative Impact Potential to assess the ecological impacts of invasive alien species. NEOBIOTA 2020. [DOI: 10.3897/neobiota.55.49547] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Invasive alien species continue to arrive in new locations with no abatement in rate, and thus greater predictive powers surrounding their ecological impacts are required. In particular, we need improved means of quantifying the ecological impacts of new invasive species under different contexts. Here, we develop a suite of metrics based upon the novel Relative Impact Potential (RIP) metric, combining the functional response (consumer per capita effect), with proxies for the numerical response (consumer population response), providing quantification of invasive species ecological impact. These metrics are comparative in relation to the eco-evolutionary baseline of trophically analogous natives, as well as other invasive species and across multiple populations. Crucially, the metrics also reveal how impacts of invasive species change under abiotic and biotic contexts. While studies focused solely on functional responses have been successful in predictive invasion ecology, RIP retains these advantages while adding vital other predictive elements, principally consumer abundance. RIP can also be combined with propagule pressure to quantify overall invasion risk. By highlighting functional response and numerical response proxies, we outline a user-friendly method for assessing the impacts of invaders of all trophic levels and taxonomic groups. We apply the metric to impact assessment in the face of climate change by taking account of both changing predator consumption rates and prey reproduction rates. We proceed to outline the application of RIP to assess biotic resistance against incoming invasive species, the effect of evolution on invasive species impacts, application to interspecific competition, changing spatio-temporal patterns of invasion, and how RIP can inform biological control. We propose that RIP provides scientists and practitioners with a user-friendly, customisable and, crucially, powerful technique to inform invasive species policy and management.
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Mofu L, Cuthbert RN, Dalu T, Woodford DJ, Wasserman RJ, Dick JTA, Weyl OLF. Impacts of non-native fishes under a seasonal temperature gradient are forecasted using functional responses and abundances. NEOBIOTA 2019. [DOI: 10.3897/neobiota.49.34986] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Developing predictive methods to forecast the impacts of existing and emerging invasive species is of critical importance to biodiversity conservation. However, invader impacts are context-dependent, making reliable and robust predictions challenging. In particular, it is unclear how temporal variabilities in relation to temperature regime shifts influence invader ecological impacts. In the present study, we quantify the functional responses of three coexisting freshwater fishes: the native freshwater River Goby Glossogobiuscallidus, and the non-native Mozambique Tilapia Oreochromismossambicus and Western Mosquitofish Gambusiaaffinis, under two temperature treatments using chironomid larvae as prey. This was used along with fish abundance data to determine temporal differences in ecological impacts of each fish species between seasons (i.e. at two corresponding temperatures). All three fish species exhibited potentially population-destabilizing Type II functional responses. Their maximum feeding rates were consistently higher in the warm temperature treatment, whereas attack rates tended to be reduced. Non-native Mozambique Tilapia had the highest maximum feeding rate under both temperature treatments (18 °C and 25 °C), followed by the non-native Western Mosquitofish and lastly the native River Goby, suggesting greater per capita impacts on native prey by non-native fishes. The predatory fish abundances differed significantly according to season, with native River Goby and non-native Mozambique Tilapia generally more abundant than non-native Western Mosquitofish. By multiplying functional response maximum feeding rates with abundances of each fish species across the seasonal gradient, the relative impact potential of non-native Mozambique Tilapia was consistently higher compared to that of native gobies. Western Mosquitofish impacts were less apparent, owing to their low abundances. We demonstrate how seasonal temperature fluctuations affect the relative impact capacities of introduced species and the utility of consumer functional response and the relative impact potential metric in impact forecasting.
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Wasserman RJ, Dick JTA, Welch RJ, Dalu T, Magellan K. Site and species selection for religious release of non-native fauna. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2019; 33:969-971. [PMID: 30417437 DOI: 10.1111/cobi.13250] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 10/16/2018] [Accepted: 11/08/2018] [Indexed: 06/09/2023]
Affiliation(s)
- Ryan J Wasserman
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Subang Jaya, Selangor Darul Ehsan, Malaysia
- Department of Biological Sciences and Biotechnology, Botswana International University of Science and Technology, Private Bag 16, Palapye, Botswana
| | - Jaimie T A Dick
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, BT9 7BL, Northern Ireland, U.K
| | - Rebecca J Welch
- School of Biology and Environmental Sciences, University of Mpumalanga, Private Bag X11283, Nelspruit, 1200, South Africa
| | - Tatenda Dalu
- Department of Ecology and Resource Management, University of Venda, Thohoyandou, 0950, South Africa
| | - Kit Magellan
- School of Biological Sciences, University of Hong Kong, Pokfulam Road, Hong Kong
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Using Network Theory to Understand and Predict Biological Invasions. Trends Ecol Evol 2019; 34:831-843. [PMID: 31155422 DOI: 10.1016/j.tree.2019.04.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 04/19/2019] [Accepted: 04/23/2019] [Indexed: 10/26/2022]
Abstract
Understanding and predicting biological invasions is challenging because of the complexity of many interacting players. A holistic approach is needed with the potential to simultaneously consider all relevant effects and effectors. Using networks to describe the relevant anthropogenic and ecological factors, from community-level to global scales, promises advances in understanding aspects of invasion from propagule pressure, through establishment, spread, and ecological impact of invaders. These insights could lead to development of new tools for prevention and management of invasions that are based on species' network characteristics and use of networks to predict the ecological effects of invaders. Here, we review the findings from network ecology that show the most promise for invasion biology and identify pressing needs for future research.
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Linzmaier SM, Goebel LS, Ruland F, Jeschke JM. Behavioral differences in an over-invasion scenario: marbled vs. spiny-cheek crayfish. Ecosphere 2018. [DOI: 10.1002/ecs2.2385] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Affiliation(s)
- Stefan M. Linzmaier
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB); Müggelseedamm 310 12587 Berlin Germany
- Department of Biology, Chemistry, Pharmacy; Institute of Biology; Freie Universität Berlin; Königin-Luise-Straße 1-3 14195 Berlin Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB); Altensteinstraße 34 14195 Berlin Germany
| | - Larissa S. Goebel
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB); Müggelseedamm 310 12587 Berlin Germany
- Department of Biology, Chemistry, Pharmacy; Institute of Biology; Freie Universität Berlin; Königin-Luise-Straße 1-3 14195 Berlin Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB); Altensteinstraße 34 14195 Berlin Germany
| | - Florian Ruland
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB); Müggelseedamm 310 12587 Berlin Germany
- Department of Biology, Chemistry, Pharmacy; Institute of Biology; Freie Universität Berlin; Königin-Luise-Straße 1-3 14195 Berlin Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB); Altensteinstraße 34 14195 Berlin Germany
| | - Jonathan M. Jeschke
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB); Müggelseedamm 310 12587 Berlin Germany
- Department of Biology, Chemistry, Pharmacy; Institute of Biology; Freie Universität Berlin; Königin-Luise-Straße 1-3 14195 Berlin Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB); Altensteinstraße 34 14195 Berlin Germany
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