Evidence for ongoing introduction of non-native earthworms in the Washington, DC metropolitan area

Callaham, Mac A.; Snyder, Bruce A.; James, Samuel W.; Oberg, Erik

doi:10.1007/s10530-016-1230-2

Cited by 8 publications

(2 citation statements)

References 16 publications

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“…They also distribute information to anglers about the importance of proper bait disposal. Other human-related factors that correlate with earthworm invasions are farming (Keller et al 2007; Klein et al 2020), logging and proximity to roads (Dymond et al 1997; Gundale et al 2005; Suarez et al 2006; Holdsworth et al 2007; Hendrix et al 2008; Cameron et al 2008; Callaham et al 2016; Roger and Collins 2017). Further, genetic differentiation between populations at small scale (0.6-13 km) is common in L. terrestris (Klein et al 2017, Keller et al 2020), but was not present in the population we sampled in the south from an area of intense agriculture (MN_0).…”

Section: Discussionmentioning

confidence: 99%

“…Disposal of earthworms used as fishing bait and passive transport by vehicles along roads have been identified as central drivers (Holdsworth et al 2007; Keller et al 2007; Cameron et al 2007, 2008; Klein et al 2017, 2020). Further, human disturbances seem to provide suitable conditions for non-native earthworm invasions, such that active or historic human settlements, construction sites, agricultural use, and recreational areas and fishing sites contain more non-native earthworms than wilderness and undisturbed sites (Hendrix et al 2006, 2008; Callaham et al 2016; Rogers and Collins 2017; Arcese and Rodewald 2019). The identification of vulnerable sites and vectors for earthworm invasions is necessary to formulate containment guidelines, and knowledge of the local earthworm population structure is required to understand how invasive earthworms establish viable populations.…”

Section: Introductionmentioning

confidence: 99%

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Population structure and genetic variance among local populations of an non-native earthworm species in Minnesota, USA

Heimburger

Klein

Roth

et al. 2022

Preprint

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A variety of human activities have been identified as driving factors for the release and spread of invasive earthworm species in North America. Population genetic markers can help to identify locally relevant anthropogenic vectors and provide insights into the processes of population dispersal and establishment. We sampled the invasive European earthworm species Lumbricus terrestris at nine sites and several bait shops within the metropolitan area of Minneapolis-St. Paul in Minnesota, USA. We used microsatellite markers to infer genetic diversity and population structure, and 16S rDNA to address multiple introduction events, including bait dumping, which is a common source of L. terrestris introductions into the wild. Our results indicate multiple introductions but not from current bait dumping. Overall, genetic structure was low and earthworms > 5000 m apart were genetically differentiated, except for one sampling location, indicating jump-dispersal followed by population establishment. Further, earthworms at one location north of Minneapolis established from one or few founder individuals, suggesting that earthworm invasions are ongoing. We therefore encourage further monitoring of earthworm populations using molecular markers, in order to disentangle the different human-related vectors contributing to the spread of earthworms and their establishment, which is essential to develop adequate management strategies.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Population structure and genetic variance among local populations of an non-native earthworm species in Minnesota, USA

Heimburger

Klein

Roth

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

Population structure and genetic variance among local populations of a non-native earthworm species in Minnesota, USA

et al. 2023

View full text Add to dashboard Cite

A variety of human activities have been identified as driving factors for the release and spread of invasive earthworm species in North America. Population genetic markers can help to identify locally relevant anthropogenic vectors and provide insights into the processes of population dispersal and establishment. We sampled the invasive European earthworm species Lumbricus terrestris at nine sites and several bait shops within the metropolitan area of Minneapolis-St. Paul in Minnesota, USA. We used microsatellite markers to infer genetic diversity and population structure, and 16S rDNA to address multiple introduction events, including bait dumping, which is a common source of L. terrestris introductions into the wild. Our results indicate multiple introductions but not from current bait dumping. Overall, genetic structure was low and earthworms > 5,000 m apart were genetically differentiated, except for one sampling location, indicating jump-dispersal followed by population establishment. Further, earthworms at one location north of Minneapolis established from one or few founder individuals, suggesting that earthworm invasions are ongoing. We therefore encourage further monitoring of earthworm populations using molecular markers, in order to disentangle the different human-related vectors contributing to the spread of earthworms and their establishment, which is essential to develop adequate management strategies.

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2018

Fundamentals of Soil Ecology

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Evidence for ongoing introduction of non-native earthworms in the Washington, DC metropolitan area

Cited by 8 publications

References 16 publications

Population structure and genetic variance among local populations of an non-native earthworm species in Minnesota, USA

Population structure and genetic variance among local populations of an non-native earthworm species in Minnesota, USA

Population structure and genetic variance among local populations of a non-native earthworm species in Minnesota, USA

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