Removing an invasive shrub (Chinese privet) increases native bee diversity and abundance in riparian forests of the southeastern United States

Hanula, James L.; Horn, Scott

doi:10.1111/j.1752-4598.2011.00131.x

Cited by 56 publications

(34 citation statements)

References 27 publications

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“…All restoration categories had positive mean effect sizes for bee abundance (Figure ). The greatest effect size was attributed to a removal and mulching treatment of the invasive plant Chinese privet ( Ligustrum sinense ) in a woodland (Hanula & Horn, ). Invasive plant removal had the greatest positive effect on bee abundance ( d = 4.84, 95% CI 3.59–6.09, p < .0001, Figure ).…”

Section: Resultsmentioning

confidence: 99%

Habitat restoration benefits wild bees: A meta‐analysis

Tonietto

Larkin

2017

Journal of Applied Ecology

103

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Pollinator conservation is of increasing interest in the light of managed honeybee (Apis mellifera) declines, and declines in some species of wild bees. Much work has gone into understanding the effects of habitat enhancements in agricultural systems on wild bee abundance, richness and pollination services. However, the effects of ecological restoration targeting “natural” ecological endpoints (e.g. restoring former agricultural fields to historic vegetation types or improving degraded natural lands) on wild bees have received relatively little attention, despite their potential importance for countering habitat loss. We conducted a meta‐analysis to evaluate the effects of ecological restoration on wild bee abundance and richness, focusing on unmanaged bee communities in lands restored and managed to increase habitat availability and quality. Specifically, we assessed bee abundance and/or richness across studies comparing restored vs. unrestored treatments and studies investigating effects of specific habitat restoration techniques, such as burning, grazing, invasive plant removal and seeding. We analysed 28 studies that met our selection criteria: these represented 11 habitat types and 7 restoration techniques. Nearly all restorations associated with these studies were performed without explicit consideration of habitat needs for bees or other pollinators. The majority of restorations targeted plant community goals, which could potentially have ancillary benefits for bees. Restoration had overall positive effects on wild bee abundance and richness across multiple habitat types. Specific restoration actions, tested independently, also tended to have positive effects on wild bee richness and abundance. Synthesis and applications. We found strong evidence that ecological restoration advances wild bee conservation. This is important given that habitat loss is recognized as a leading factor in pollinator decline. Pollinator responses to land management are rarely evaluated in non‐agricultural settings and so support for wild bees may be an underappreciated benefit of botanically focused management. Future restoration projects that explicitly consider the needs of wild bees could be more effective at providing nesting, foraging and other habitat resources. We encourage land managers to design and evaluate restoration projects with the habitat needs of wild bee species in mind.

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Section: Resultsmentioning

confidence: 99%

Habitat restoration benefits wild bees: A meta‐analysis

Tonietto

Larkin

2017

Journal of Applied Ecology

103

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“…This usually includes site preparation through clearing, root-raking, slash burning, chopping, disking, and/or bedding [16,22,35], which reduces the likelihood of Chinese privet establishment into the newly created forest gap. This removal of non-desirable species and subsequent rapid stand growth can inhibit the invasion establishment into a newly formed forest gap [36], which is otherwise at risk for invasion given the aggressive exploitation of light gaps and rapid growth under high light conditions exhibited by Chinese privet [5,7,9]. Planting native species and subsequent management for those species reduces the opportunity for Chinese privet spread.…”

Section: Discussionmentioning

confidence: 99%

Invasion of Eastern Texas Forestlands by Chinese Privet: Efficacy of Alternative Management Strategies

Wang

Grant

2014

Diversity

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Chinese privet (Ligustrum sinense) was the most prevalent invasive shrub in the forestlands of Eastern Texas in 2006. We analyzed extensive field data collected by the Forest Inventory and Analysis Program of the U.S. Forest Service to quantify the range expansion of Chinese privet from 2006 to 2011. Our results indicated the presence of Chinese privet on sampled plots increased during this period. Chinese privet spread extensively in the north. Results of logistic regression, which classified 73% of the field plots correctly with regard to species presence and absence, indicated probability of invasion was correlated positively with elevation, adjacency (within 300 m) to water bodies, and site productivity, and was correlated negatively with stand age, site preparation (including clearing, slash burning, chopping, disking, bedding, and other practices clearly intended to prepare a site for regeneration), artificial regeneration (which refers to planting or direct seeding that results in at least 50% of the stand being comprised of stocked trees), and distance to the nearest road. Habitats most at risk to further invasion (likelihood of invasion > 40%) under current conditions occurred primarily in Northeast Texas. Practicing site preparation and artificial regeneration reduced the estimated probabilities of further invasion.

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“…(); 9 Bartomeus, Bosch & Vila (), Bartomeus, Vilà & Steffan‐Dewenter (); 10 Novotny et al . (), Ernst & Cappuccino (), Hanula & Horn (), Elleriis, Pedersen & Toft (); 11 Kaiser‐Bunbury et al . (), Albrecht et al .…”

Section: Impacts Of Invasive Plants On Pollinatorsunclassified

Direct interactions between invasive plants and native pollinators: evidence, impacts and approaches

Stout

Tiedeken

2016

Functional Ecology

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Summary1. Invasive non-native plants form interactions with native species and have the potential to cause direct and indirect impacts on those species, as well as the functioning of invaded ecosystems. 2. Many entomophilous invasive plants form interactions with resident pollinators; sometimes, these interactions are necessary for the reproductive success of the invader. However, the direct role native pollinators play in plant invasion is not well understood and varies according to invasive plant traits, including breeding system and pollination syndrome. 3. The majority of studies addressing impacts on plant-pollinator mutualisms have focussed on the indirect impacts of plant invasion for native plant pollination. Fewer studies have focussed on the direct effects of invasive plants on native flower visitors. 4. Impacts of invasive plants on native pollinators can occur at a range of scales: from the individual flower visitors (in terms of nutrition, health and fitness), to populations (size, density and growth rates), communities (richness, diversity and composition) and community-level interactions (insect-flower interaction networks). Most research to date has focussed on community-level impacts, with almost nothing known about the effects of invaders on native flower visitor individuals or populations. 5. Invasive plant traits, including reward quantity and quality, spatial and temporal availability and accessibility, modulate effects on native flower visitors, and thus, different plant species have different impacts. Similarly, flower visitors do not all respond in the same way to invasive plants. Thus, generalizations are difficult to make, but understanding impacts at the individual and population level for different visitor taxa is key to explaining community-level impacts. 6. There have been varied approaches to determining impacts, with most studies attempting to compare invaded vs. non-invaded habitats. The pros and cons of different approaches are discussed. 7. Since it is impractical to study every invasive plant in every ecological context in which it occurs, we recommend a better understanding of relevant individual-level traits to predict direct interactions between invasive plants and native pollinators.

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Removing an invasive shrub (Chinese privet) increases native bee diversity and abundance in riparian forests of the southeastern United States

Cited by 56 publications

References 27 publications

Habitat restoration benefits wild bees: A meta‐analysis

Habitat restoration benefits wild bees: A meta‐analysis

Invasion of Eastern Texas Forestlands by Chinese Privet: Efficacy of Alternative Management Strategies

Direct interactions between invasive plants and native pollinators: evidence, impacts and approaches

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