Environmental factors that influence the association of an earthworm (Lumbricus terrestris L.) and an annual weed (Ambrosia trifida L.) in no-till agricultural fields across the eastern U.S. Corn Belt

Schutte, Brian J.; Liu, Jianyang; Davis, Adam S.; Harrison, S. Kent; Regnier, Emilie E.

doi:10.1016/j.agee.2010.05.001

Cited by 13 publications

(13 citation statements)

References 54 publications

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“…Giant ragweed fruits are also collected by the non‐native earthworm Lumbricus terrestris , facilitating enhanced recruitment from (thus selection for) larger fruits because smaller fruits are buried more deeply in the soil than is optimal for their emergence (Regnier et al., ). This association is common in the eastern part of our study region (Schutte, Liu, Davis, Harrison, & Regnier, ) and could contribute to selection for larger fruits there. We do not know how common these interactions between ragweed and earthworms (or other key seed predators/dispersers) are throughout its range, but such data would be useful for testing this hypothesis.…”

Section: Discussionmentioning

confidence: 73%

“…This association is TA B L E 4 Narrow-sense heritability estimates and bootstrapped 95% confidence intervals (CI). All estimates are significantly greater than zero except for individual fruit mass in agricultural populations common in the eastern part of our study region (Schutte, Liu, Davis, Harrison, & Regnier, 2010) and could contribute to selection for larger fruits there. We do not know how common these interactions between ragweed and earthworms (or other key seed predators/dispersers) are throughout its range, but such data would be useful for testing this hypothesis.…”

Section: Regional-scale Variation In Fruit Size and Numbermentioning

confidence: 74%

“…Additional complications arise from the possibility that climatic conditions may also influence seed predators, which in some systems remove more seeds where evapotranspiration and/or mean annual precipitation is greater (Orrock et al, 2015;Peco, Laffan, & Moles, 2014). For example, the likelihood of a fruit-caching association between giant ragweed and the earthworm L. terrestris is higher in sites with greater fall and winter precipitation (Schutte et al, 2010), perhaps leading to regional variation in the strength of earthworm-mediated selection pressure. What about regional variation in fecundity?…”

Section: Regional-scale Variation In Fruit Size and Numbermentioning

confidence: 99%

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A mosaic of phenotypic variation in giant ragweed (Ambrosia trifida): Local‐ and continental‐scale patterns in a range‐expanding agricultural weed

Hovick

McArdle

Harrison

et al. 2018

Evolutionary Applications

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Spatial patterns of trait variation across a species' range have implications for population success and evolutionary change potential, particularly in range‐expanding and weedy species that encounter distinct selective pressures at large and small spatial scales simultaneously. We investigated intraspecific trait variation in a common garden experiment with giant ragweed (Ambrosia trifida), a highly variable agricultural weed with an expanding geographic range and broad ecological amplitude. Our study included paired populations from agricultural and natural riparian habitats in each of seven regions ranging east to west from the core of the species' distribution in central Ohio to southeastern Minnesota, which is nearer the current invasion front. We observed trait variation across both large‐ and small‐scale putative selective gradients. At large scales, giant ragweed populations from the westernmost locations were nearly four times more fecund and had a nearly 50% increase in reproductive allocation compared to populations from the core. The degree of surface texture on fruits also declined from east to west. Greater fecundity in the west represents a putative trade‐off between fruit size and fruit number across the study region, although no such trade‐off was found across individual plants. This pattern may effectively result in greater propagule pressure closer to the invasion front. At smaller spatial scales, plants from agricultural populations emerged later and were smaller than plants from riparian populations. However, because plants from agricultural populations allocated more biomass to reproduction, total fecundity did not differ across habitats. Our emergence data are consistent with previous observations showing delayed emergence in agricultural compared to natural populations; thus evolutionary change may be predictable as giant ragweed continues spreading into agricultural fields throughout North America. These shifts in life‐history strategy apparently bear no fecundity cost, suggesting that giant ragweed's success can be attributed at least in part to its substantial adaptive potential.

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Section: Discussionmentioning

confidence: 73%

Section: Regional-scale Variation In Fruit Size and Numbermentioning

confidence: 74%

Section: Regional-scale Variation In Fruit Size and Numbermentioning

confidence: 99%

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A mosaic of phenotypic variation in giant ragweed (Ambrosia trifida): Local‐ and continental‐scale patterns in a range‐expanding agricultural weed

Hovick

McArdle

Harrison

et al. 2018

Evolutionary Applications

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“…An association between A. trifida and earthworms has only very recently been observed: in the native range of A. trifida, non-native earthworms (Lumbricus terrestris) cache its seeds in burrows. Beyond the benefits for the plants (reduction of fast seed predation), giant ragweed appears to increase dispersal opportunities through this acquired form of diplochory (Regnier et al, 2008(Regnier et al, , 2016Schutte et al, 2010). However, it allows a very shortrange translocation, probably less than one meter from the mother plant, considering the homing capability and movements of earthworms (Nuutinen and Butt, 2005).…”

Section: Dispersalmentioning

confidence: 99%

The Worldwide Spread, Success, and Impact of Ragweed (Ambrosiaspp.)

Montagnani

Gentili

Smith

et al. 2017

Critical Reviews in Plant Sciences

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Ambrosia species represent one of the most problematic groups of invasive weeds around the world. The ease they are introduced and spread in new countries, their generalist ecological requirements and functional traits facilitate their invasion and subsequent naturalization in new areas. All of these aspects contribute to increasing their global social and economic impact, which is mostly related to pollen allergy. Here we analyse available scientific publications about Ambrosia artemisiifolia, A. psilostachya, A. tenuifolia and A. trifida, with the aim of defining the current level of knowledge and summarizing important data that is currently scattered throughout the literature. Specifically, we analysed the following: (1) their current global distribution and current stage of invasion; (2) traits and requirements promoting their introduction, reproductive success and adaptation to climate and environment in the non-native range; as well as (3) current knowledge about allergens and elements increasing their impact.

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“…Lumbricus terrestris is an anecic surface feeding earthworm that is particularly vulnerable to environmental conditions such as nutrient and microbial status (7, 8). Understanding of the factors contributing to the survival of this earthworm would therefore be important due to the large environmental impact of L. terrestris .…”

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confidence: 99%

Correlations betweenLumbricus terrestrissurvival and gut microbiota

Rudi¹,

Strætkvern²

2012

Microbial Ecology in Health & Disease

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BackgroundThe interplay between diet, gut bacteria and health still remain enigmatic. Here, we addressed this issue through the investigation of the effect of crystalline cellulose on the earthworm Lumbricus terrestris gut microbiota composition and survival.MethodsEarthworm gut contents were analyzed after 14 days of feeding using a mixed 16S rRNA gene sequencing approach, in addition to direct measurements of cellulase activity. The survival of earthworms was followed each week for 17 weeks.ResultsWe found a tendency that the crystalline cellulose fed earthworms survived better than the high energy fed earthworms (p=0.08). Independent of feeding we found that the bacterial group related to Ferrimonadaceae was correlated to an increased lifespan (p=0.01). We also found a positive correlation between Ruminococcaceae related bacteria and cellulase activity in the earthworm gut (p=0.05). Surprisingly, however, the cellulase activity was not correlated to the feeding regime.ConclusionTaken together, the interactions between diet, gut microbiota and lifespan seem complex.

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Environmental factors that influence the association of an earthworm (Lumbricus terrestris L.) and an annual weed (Ambrosia trifida L.) in no-till agricultural fields across the eastern U.S. Corn Belt

Cited by 13 publications

References 54 publications

A mosaic of phenotypic variation in giant ragweed (Ambrosia trifida): Local‐ and continental‐scale patterns in a range‐expanding agricultural weed

A mosaic of phenotypic variation in giant ragweed (Ambrosia trifida): Local‐ and continental‐scale patterns in a range‐expanding agricultural weed

The Worldwide Spread, Success, and Impact of Ragweed (Ambrosiaspp.)

Correlations betweenLumbricus terrestrissurvival and gut microbiota

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