Secondary invasions of noxious weeds associated with control of invasive Tamarix are frequent, idiosyncratic and persistent

González, Eduardo; Sher, Anna A.; Anderson, Robert M.; Bay, Robin F.; Bean, Daniel W.; Bissonnete, Gabriel J.; Cooper, David J.; Dohrenwend, Kara; Eichhorst, Kim D.; Waer, Hisham El; Kennard, Deborah K.; Weissinger, Rebecca; Henry, A.; Makarick, Lori J.; Ostoja, Steven M.; Reynolds, Lindsay V.; Robinson, W. Wright; Shafroth, Patrick B.; Tabacchi, Erich

doi:10.1016/j.biocon.2017.06.043

Cited by 33 publications

(25 citation statements)

References 47 publications

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“…We believe these results report a novel use of semiochemicals, to attract and retain beneficial defoliating insects and thereby yield greater defoliation of targeted plants for pest management purposes. This effect of increased biological control efficacy could have broad ecological implications, considering Tamarix biological control is the method most resilient to secondary invasion of other noxious weeds …”

Section: Discussionmentioning

confidence: 99%

“…This effect of increased biological control efficacy could have broad ecological implications, considering Tamarix biological control is the method most resilient to secondary invasion of other noxious weeds. 49,50 Emission rates of the semiochemicals were variable and diminished rapidly after 7 days. After day 7, the much lower release rates stabilized for the next 24 days.…”

Section: Discussionmentioning

confidence: 99%

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Semiochemicals to enhance herbivory by Diorhabda carinulata aggregations in saltcedar (Tamarix spp.) infestations

Gaffke

Sing

Dudley

et al. 2018

Pest Management Science

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BACKGROUNDSemiochemicals for monitoring, attracting or repelling pest and beneficial organisms are increasingly deployed in agricultural and forest systems for pest management. However, the use of aggregation pheromones and host‐plant attractants for the express purpose of increasing the efficacy of classical biological control agents of weeds has not been widely reported. Therefore, we conducted field‐based assays to determine if a specialized wax‐based matrix impregnated with an aggregation pheromone of the northern tamarisk beetle Diorhabda carinulata (Desbrochers) or host‐plant volatiles could increase the efficacy of D. carinulata.RESULTSThe aggregation pheromone and host‐plant volatiles were formulated for field application using a wax‐based matrix. Reported release rates suggest that this matrix is a viable formulation for enhancing D. carinulata aggregations under field conditions. Pheromone‐treated saltcedar plants (Tamarix spp.) not only had higher densities of adult and larval D. carinulata, but also sustained greater levels of foliar damage than control plants. Increased damage from the focused feeding of D. carinulata caused an increase in foliar dieback and decrease in live canopy volume of semiochemical‐treated plants.CONCLUSIONField deployment of these semiochemical formulations could be useful in directing populations of D. carinulata for increased impact on Tamarix spp. © 2018 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Semiochemicals to enhance herbivory by Diorhabda carinulata aggregations in saltcedar (Tamarix spp.) infestations

Gaffke

Sing

Dudley

et al. 2018

Pest Management Science

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“…Bromus spp. are frequent in Tamarix-invaded rivers in the region (González et al, 2017b), but their invasion is more severe in rangelands (Blank, Morgan, & Allen, 2015). The frequency and cover of S. barbatus barely changed after the flood.…”

Section: Individual Species Responses To the Large Floodmentioning

confidence: 98%

“…The great response of S. tragus to the flood was not surprising, as this species has been reported to colonize recently disturbed sites following efforts to remove Tamarix from riparian systems (González et al, 2017a(González et al, , 2017b. S. tragus is a tumbleweed, an annual forb that reproduces only by seed (Friesen, Beckie, Warwick, & Acker, 2009).…”

Section: Individual Species Responses To the Large Floodmentioning

confidence: 99%

Short‐term geomorphological and riparian vegetation responses to a 40‐year flood on a braided, dryland river

Shafroth

Lee

Leverich³

et al. 2019

Ecohydrology

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In December 2010, a 40-year flood occurred in the lower Virgin River (SE Nevada, southwestern United States), a braided river segment with riparian vegetation largely dominated by invasive shrubs in the genus Tamarix. We assessed geomorphological and vegetation responses to this large magnitude disturbance event by comparing pre-and post-flood remote sensing and field survey data in four river reaches. Analyses of orthophotos and light detection and ranging-derived topography showed that both the active channel area and channel width increased between 80% and 258%, representing an increase from 13% to 30% of the total river corridor area. Erosion predominated in the outer bends of the enlarged channel and deposition in the pre-flood channel, causing local avulsions of the low-flow channel. Field-based topographic data recorded before and after the flood in 385 plots also showed that deposition occurred in parts of the floodplain that were not eroded. Two thirds of woody vegetation cover (mainly dominated by Tamarix, with some native shrub Pluchea sericea) was lost in areas that eroded (~20% of the river corridor). In the remaining~80% of stable river corridor (aggrading or no change in elevation) Tamarix remained dominant. Following erosion, but also where sediment deposition predominated under the Tamarix canopy, the most common colonizing vegetation in the understory was comprised of annual plants, especially Salsola tragus. Our study supported previous studies describing large floods in braided rivers; we documented the first phase of a cycle of channel widening and increase in vegetation heterogeneity that is commonly followed by narrowing and vegetation homogenization.

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“…Numerous factors contribute to the difficulty of effective passive restoration. These include legacy effects of invasion (Yelenik et al 2004, Corbin and D'Antonio 2012, Gioria and Pyšek 2016, secondary invasions (Kettenring and Adams 2011, Pearson et al 2016a, González et al 2017a), non-target effects of invader control (Mason and French 2007, Rinella et al 2009, Skurski et al 2013, and variation in the resilience of the community (Prior et al 2018). Also to be considered are the positive effects that some invaders have, such as the nesting sites and protection afforded by invasive shrub species to birds, reptiles and small mammals in disturbed landscapes (D'Antonio and Meyerson 2002).…”

Section: Why Weed Removal Actions Should Be Guided By Asset Recoverymentioning

confidence: 99%

Identifying thresholds and ceilings in plant community recovery for optimal management of widespread weeds

Panetta¹,

O’Loughlin

Gooden³

2019

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A substantial body of work underlies the theory and practice of early intervention in the management of invasive alien plants, but less attention has been paid to the strategic management of widespread weeds, especially in the context of natural asset recovery. The assumption lingers amongst some researchers and land managers that removing weeds will automatically lead to positive biodiversity outcomes, with the more weed removed, the better the outcome. However, this is often not the case, particularly for long-established weed species whose dominance has created impoverished communities with little capacity for passive recovery. A common result may be wasted investment in weed control and, in the extreme, net negative impacts upon asset values. We present a conceptual model for the management of weed-impacted assets, plus guidance for its application, with a view to improving asset recovery practice. Weed removal should be calibrated by asset recovery, which may mean not seeking to completely remove a weed at a given spatial scale. Our model focusses on weed removal that is enough to initiate asset recovery, but not more than is necessary to promote maximum expression of asset resilience, particularly in the context of secondary invasions. Optimal management efficiency will involve a proportional allocation of resources to control, monitoring and revegetation activities that is appropriate to the stage of asset recovery, as well as a willingness to revise a management goal if the original one cannot be achieved within existing constraints on resources.

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Secondary invasions of noxious weeds associated with control of invasive Tamarix are frequent, idiosyncratic and persistent

Cited by 33 publications

References 47 publications

Semiochemicals to enhance herbivory by Diorhabda carinulata aggregations in saltcedar (Tamarix spp.) infestations

Semiochemicals to enhance herbivory by Diorhabda carinulata aggregations in saltcedar (Tamarix spp.) infestations

Short‐term geomorphological and riparian vegetation responses to a 40‐year flood on a braided, dryland river

Identifying thresholds and ceilings in plant community recovery for optimal management of widespread weeds

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