Increasing agricultural land use is associated with the spread of an invasive fish (Gambusia affinis)

Lee, Finnbar; Simon, Kevin S.; Perry, George L.

doi:10.1016/j.scitotenv.2017.02.101

Cited by 24 publications

(22 citation statements)

References 73 publications

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“…Native to the south-eastern United States of America, G. affinis are now found on every continent except Antarctica (Pyke, 2008) and are often associated with degraded waterways (Lee et al, 2017).…”

Section: O R I G I N a L A R T I C L Ementioning

confidence: 99%

“…We measured local physiochemical and habitat variables associated with agricultural land use including water temperature (YSI EC300, Figure 1) but are noncontinuous, this is due to the sites in this study being a subset of a larger set of sites used in Lee et al (2017), which provides further details of physiochemical measurement methods and site characteristics. Site F08 had been sprayed with herbicide prior to sampling resulting in a die-off of much of the macrophytes present in the stream, which likely contributed to the low taxa richness observed there; thus, it was excluded from the GLM analysis.…”

Section: Field Samplingmentioning

confidence: 99%

“…This flexibility may allow G. affinis to sustain themselves in times of resource shortage. It has been shown that agricultural land use is implicated in the spread of G. affinis (Lee et al, 2017), they are also capable of reaching high densities where conditions are favourable (Pyke, 2008), are aggressive competitors (Rehage et al, 2005) and generalist predators. All of these traits suggest that G. affinis may play an important role in regulating food web dynamics in degraded streams.…”

Section: Con Clus Ionmentioning

confidence: 99%

“…For example, the degradation of streams caused by agricultural land use is associated with the spread of the invasive fish Gambusia affinis in northern New Zealand (Lee, Simon, & Perry, 2017). The ability of an invader to use a wide variety of resources, coupled with the physiochemical and habitat alterations associated with anthropogenic degradation, may facilitate invasive species spread (Rehage, Barnett, Accepted: 15 January 2018DOI: 10.1111 …”

Section: Introductionmentioning

confidence: 99%

“…Figure 1) but are noncontinuous, this is due to the sites in this study being a subset of a larger set of sites used inLee et al (2017), which provides further details of physiochemical measurement methods and site characteristics. Site F08 had been sprayed with herbicide prior to sampling resulting in a die-off of much of the mac-…”

mentioning

confidence: 99%

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Prey selectivity and ontogenetic diet shift of the globally invasive western mosquitofish (Gambusia affinis) in agriculturally impacted streams

Lee

Simon

Perry

2018

Ecology of Freshwater Fish

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The dietary breadth of invaders can influence their success, and having a wide dietary niche can facilitate the spread and survival of invaders under a variety of resource scenarios. The western mosquitofish (Gambusia affinis) is a globally distributed freshwater invasive fish. The spread of G. affinis is associated with agricultural land use, although the trophic role it plays in degraded systems is not well understood. We analysed the invertebrate community in 11 stream reaches in the North Island of New Zealand, in catchments spanning a range (45%-90%) of agricultural land use to determine how prey availability changes with land use. We then analysed the gut contents of 400 G. affinis from the 11 sites to determine how diet varied with prey availability and ontogeny. Invertebrate communities varied along the agricultural land-use gradient, both in regard to taxonomic richness and community composition.G. affinis consumed a wide variety of food items with invertebrates being the most dominant, in particular Culicidae, Copepods and amphipods were the most commonly consumed invertebrates. There was also an ontogenetic diet shift from microinvertebrates (Cladocera, Copepods and diatoms) to larger invertebrates, including Culicidae, amphipods and terrestrial invertebrates. G. affinis are capable of consuming a wide variety of prey in agricultural streams; their preferred prey are generally pollution-tolerant taxa commonly found in degraded streams. Having a large level of dietary plasticity coupled with preferring prey that are often associated with degraded systems likely facilitates to the spread of one of the most widely distributed freshwater invasive fish. K E Y W O R D Sagriculture, diet plasticity, Gambusia affinis, invasive species | 823 LEE Et aL.

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Section: O R I G I N a L A R T I C L Ementioning

confidence: 99%

Section: Field Samplingmentioning

confidence: 99%

Section: Con Clus Ionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Prey selectivity and ontogenetic diet shift of the globally invasive western mosquitofish (Gambusia affinis) in agriculturally impacted streams

Lee

Simon

Perry

2018

Ecology of Freshwater Fish

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Off to new shores: Climate niche expansion in invasive mosquitofish (Gambusia spp.)

Jourdan

Riesch

Cunze

2021

Ecology and Evolution

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Climate‐change impacts exacerbate conservation threats in island systems: New Zealand as a case study

Macinnis‐Ng

McIntosh

Monks³

et al. 2021

Frontiers in Ecol & Environ

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A lthough islands cover only ~5% of the global land area, they support ~20% of terrestrial plant and vertebrate species (Courchamp et al. 2014). Insular species are particularly vulnerable to extinction; one-third of critically endangered species and nearly two-thirds of recent extinctions consisted of species endemic to islands (Tershy et al. 2015), and these declines may have impacts on Indigenous peoples (Lyver et al. 2019). Several interacting factors contribute to this vulnerability, including invasions by non-native species and habitat loss (Simberloff et al. 2013). Island ecosystems are particularly susceptible to multiple climate-change factors, including rising sea level and loss of suitable climatic conditions (Courchamp et al. 2014), but conservation and restoration efforts rarely account for such interacting drivers of change (Parmesan et al. 2013). Understanding the effects of climate change on island ecosystems necessitates knowing how climate interacts with other ecologically influential processes (eg habitat loss, land transformation, invasive species). Here, we use the example of New Zealand to highlight interactions between changing climate and other threats to biodiversity, and stress the need to collect and maintain long-term datasets to improve strategies to mitigate climate-change effects. Lessons learned from New Zealand are relevant to islands (and potentially continental systems) elsewhere (Simberloff 2019), particularly with respect to the indirect and interactive effects of climate-change impacts. Although we focus on land-based ecosystems, we note that warming seas and ocean acidification are affecting marine systems in New Zealand's territorial waters, as well as elsewhere. Finally, we emphasize the need to work with Indigenous communities to improve the effectiveness of mitigation and adaptation approaches. New Zealand (also known by the Indigenous name Aotearoa) consists of three main islands, along with hundreds of smaller islands in rivers, lakes, and harbors, as well

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Increasing agricultural land use is associated with the spread of an invasive fish (Gambusia affinis)

Cited by 24 publications

References 73 publications

Prey selectivity and ontogenetic diet shift of the globally invasive western mosquitofish (Gambusia affinis) in agriculturally impacted streams

Prey selectivity and ontogenetic diet shift of the globally invasive western mosquitofish (Gambusia affinis) in agriculturally impacted streams

Off to new shores: Climate niche expansion in invasive mosquitofish (Gambusia spp.)

Climate‐change impacts exacerbate conservation threats in island systems: New Zealand as a case study

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