Control method that may limit an invasive plant in a protected area: stem breaking decreases alien goldenrod performance and enhances pest attack

The exotic Chromolaena odorata is one of the most destructive invasive plant species in South China, and hence an efficient and sustainable control method is urgent. One method, replacement control, which eliminates harmful plants by introducing another competitive plant, is being used increasingly for controlling invasive plants. To test the potential of Pennisetum hydridum to control C. odorata, a series of polyculture experiments with different proportions of the two species was conducted. Competitive indices, plant morphological and physiological traits, and soil nutrient contents were measured to test the impacts of P. hydridum on C. odorata. The presence of P. hydridum significantly suppressed growth of C. odorata, and P. hydridum was not sensitive to the presence of C. odorata. Moreover, increased root/shoot ratios of P. hydridum enhanced its underground competitive ability, and competition between the two species resulted in remarkable reductions of soil nutrient contents which would further decrease the competitiveness of the invasive C. odorata. In summary, our results suggest that P. hydridum is a prospective candidate to control C. odorata.

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Can an exotic tree (Jackfruit, Artocarpus heterophyllus Lam.) influence the non-volant small mammals assemblage in a protected area of Atlantic Forest?

Journal of Tropical Ecology ◽

10.1017/s026646742000019x ◽

2020 ◽

Vol 36 (5) ◽

pp. 243-250

Author(s):

Rayanne Gama-Matos ◽

Átilla Colombo Ferreguetti ◽

Giulia Mekiassen do Nascimento ◽

Juliane Pereira-Ribeiro ◽

Natália Vagmaker ◽

...

Keyword(s):

Atlantic Forest ◽

Small Mammals ◽

Protected Area ◽

Invasive Plant ◽

Fruit Production ◽

Artocarpus Heterophyllus ◽

Eastern Brazil ◽

Exotic Tree ◽

Exotic Invasive ◽

Species Richness And Abundance

AbstractJackfruit (Artocarpus heterophyllus Lam.) is an exotic invasive plant species in the Brazilian Atlantic Forest that causes changes in the environment through the release of allelopathic substances and has high fruit production. We aimed to understand the potential effects of the jackfruit on the non-volant small mammal assemblage in an area protected by law, in the municipality of Cariacica – Espírito Santo, south-eastern Brazil. We sampled the small mammals assemblage using live traps in 18 sites, eight with jackfruit and 10 without. We ordinated the assemblage and tested possible differences in species richness and abundance according to the jackfruit density. We recorded 31 species of non-volant small mammals, with 13 species endemic to the Atlantic Forest. Jackfruit species can affect both positively and negatively the studied assemblage of non-volant small mammals. For species with a frugivory habit, jackfruit has a positive effect favouring these species. On the other hand, for insectivorous species, jackfruit represents an impact inhibiting the presence of these species in an area with high jackfruit density. The results presented are the first step in understanding the effect of this invasive species on a small mammals assemblage and initiating a monitoring of these species in areas affected by jackfruits. Furthermore, management of jackfruits in this protected area is required.

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A Case Study of Waterhyacinth (Eichhornia crassipes) Control in Puerto Rico Using Glyphosate and Hand Removal

Invasive Plant Science and Management ◽

10.1017/inp.2021.19 ◽

2021 ◽

pp. 1-26

Author(s):

Wilfredo Robles ◽

Edda L. Martínez

Keyword(s):

Puerto Rico ◽

Invasive Plant ◽

Control Method ◽

Freshwater Wetlands ◽

Management Tool ◽

Untreated Plot ◽

San Jose ◽

Neochetina Eichhorniae ◽

Water Ph ◽

Wildlife Refuges

Abstract Waterhyacinth is an aquatic invasive plant that is widespread in Puerto Rico where it negatively effects estuaries, freshwater wetlands, potable water reservoirs, and wildlife refuges. Specifically, the tropical estuary San Juan Bay Estuary (SJBE) has been impacted with the presence of waterhyacinth. Infestations have led to a reduction of water circulation in the system as well as facilitating the establishment of invasive fauna. Therefore, a field study was conducted in a cove between Laguna San Jose and Peninsula Cantera to assess the use of glyphosate and hand removal as a management tool for waterhyacinth control. Aquatic macroinvertebrates and water quality were also monitored as a measure of environmental impact due to management activities. Results indicated that two weeks after glyphosate application, waterhyacinth biomass was significantly reduced to 0.27 kg DW m−2 at the treated plot as compared to untreated plot that yielded 0.62 kg DW m−2. Fresh weight of waterhyacinth decreased more than 90% when hand removal was used as compared to glyphosate treatment. Dissolved oxygen and water pH were not significantly different between sites however, water salinity increased to 8-9 ppt at both plots caused by tidal activity. The order Hemiptera followed by Sarcoptiformes were common at the aquatic macroinvertebrate community. Macroinvertebrate species found associated with waterhyacinth and considered natural enemies were: Orthogalumna terebrantis, Neochetina eichhorniae, Niphograpta albiguttalis. The use of glyphosate to manage waterhyacinth at the Laguna San Jose was useful as a short-term control method and its efficacy may be enhanced over time with follow up applications in combination with hand removal.

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ASSESSMENT OF INVASIVE PLANT SPECIES, OPUNTIA SPP. (PRICKLY PEAR) IN RAYDAH PROTECTED AREA, ASEER, SAUDI ARABIA

Applied Ecology and Environmental Research ◽

10.15666/aeer/1705_1080710822 ◽

2019 ◽

Vol 17 (5) ◽

Author(s):

H M ALWADAI

Keyword(s):

Saudi Arabia ◽

Plant Species ◽

Protected Area ◽

Invasive Plant ◽

Prickly Pear ◽

Invasive Plant Species ◽

Opuntia Spp

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Invasive-Plant-Removal Frequency—Its Impact on Species Spread and Implications for Further Integration of Forest-Management Practices

Forests ◽

10.3390/f9080502 ◽

2018 ◽

Vol 9 (8) ◽

pp. 502

Author(s):

Bernabas Wolde ◽

Pankaj Lal

Keyword(s):

Forest Management ◽

Plant Species ◽

Management Practices ◽

Invasive Plant ◽

Control Method ◽

Trend Test ◽

Invasive Plant Species ◽

Management Plans ◽

Plant Removal ◽

Armitage Trend Test

For a given invasive plant species and control method, effective invasive plant eradication requires regular monitoring and management. While most previous studies characterize invasive plant species, develop appropriate control methods, or prioritize species for management using aggressiveness and other considerations, few study why some forestland owners are less likely than others to regularly remove invasive plant species. Such information is useful in prioritizing and targeting forestland owners who are at greater risk for invasion, with the stands threatening adjacent forestlands. Towards this end, we surveyed 1800 forestland owners in Virginia and Texas. We use data on forestland owners’ socioeconomics and forestland features—such as acreage, forestland ownership objectives, and forest management activities—to determine how these factors affect the regularity of invasive-plant removal. For these purposes, we used the Cochran–Armitage trend test, the Cochran–Mantel–Haenszal regression, odds ratio estimates, and partition-analysis techniques. Our results suggest that female forestland owners, owners with smaller forestlands, and forestland owners without written forest-management plans are less likely than others to regularly remove invasive plant species. Forest-management activities, such as building/maintaining roads in the forestland, partially harvesting stands, and wildlife- and fisheries-improvement projects, also significantly predict a more regular invasive-plant-removal tendency. However, since these activities are potential pathways for the spread of invasive plant species, we controlled for the other significant covariates and measured the relationship between frequent practice of the given forest-management activities and having a tendency to regularly remove invasive plant species. The results suggest that forestland owners that regularly practiced the said forest-management activities have higher odds for tending to remove invasive plant species regularly, suggesting that, despite their demonstrated effort at removing invasive plant species from their forest, their management activities may be inadvertently contributing to the spread of invasive plant species. These results highlight the importance of integrating invasive-plant-removal plans with forest-management plans as well as forestland owners’ educational and outreach needs.

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The role of protected area zoning in invasive plant management

Biodiversity and Conservation ◽

10.1007/s10531-018-1508-z ◽

2018 ◽

Vol 27 (8) ◽

pp. 1811-1829 ◽

Cited By ~ 2

Author(s):

Johana Vardarman ◽

Kateřina Berchová‐Bímová ◽

Jana Pěknicová

Keyword(s):

Protected Area ◽

Invasive Plant ◽

Plant Management ◽

Invasive Plant Management

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Efficacy of invasive alien plants in controlling Arionidae slugs

Spanish Journal of Agricultural Research ◽

10.5424/sjar/2020181-15542 ◽

2020 ◽

Vol 18 (1) ◽

pp. e1001 ◽

Cited By ~ 3

Author(s):

Ziga Laznik ◽

Tanja Bohinc ◽

Kristijan Franin ◽

Ivana Majić ◽

Stanislav Trdan

Keyword(s):

Plant Species ◽

Field Trial ◽

Plant Material ◽

Invasive Plant ◽

Control Method ◽

Invasive Plant Species ◽

Japanese Knotweed ◽

Liquid Formulation ◽

Plant Powders ◽

Material Powder

Aim of study: To develop an alternative slug control method, we explored the use of plant material from seven invasive plant species against Arion slugs.Area of study: The experiments were performed at the University of Ljubljana (Slovenia).Material and methods: In laboratory (exp. A-C) and semi-field studies (exp. D), we investigated the contact and barrier efficacy of plant material (powder or liquid formulation) of seven invasive plant species (Japanese knotweed, bohemian knotweed, Canadian goldenrod, giant goldenrod, staghorn sumac, tree of heaven, and false indigo) against Arion slugs. In order to test a contact efficacy of the substance (exp. A), slugs were rolled in a plant material powder. In exp. B, powder made from a plant material was used as a barrier for slugs. Antifeedant effect of the slugs was tested in exp. C, where lettuce leaves were treated with a liquid formulation of a plant material. In exp. D, all above mentioned techniques were used in a semi-field trial.Main results: The results of our studies showed that the plant material of staghorn sumac, giant goldenrod, and Japanese knotweed showed the strongest anti-feedant and barrier effects against the slugs. In the semi-field trial, only 7% of the plants treated with giant goldenrod plant material were attacked by slugs.Research highlights: A contact efficacy of plant powders against Arion slugs was not confirmed in our investigation. Furthermore, several plant powders (goldenrods, staghorn sumac) showed good barrier efficacy. A semi-field trial showed that plant material (giant goldenrod) could represent an alternative solution in slug control.

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Cross-Boundary Weed Management in Protected Area-Centered Ecosystems: How Can it Work and What Makes it Harder to Achieve?

Invasive Plant Science and Management ◽

10.1017/inp.2021.24 ◽

2021 ◽

pp. 1-22

Author(s):

Natalie Otto ◽

Mark Brunson

Keyword(s):

National Parks ◽

Weed Management ◽

Protected Area ◽

Invasive Plant ◽

Spatial Scales ◽

Social Systems ◽

Plant Management ◽

Ecological Processes ◽

Invasive Plant Management ◽

Local Stakeholder

Abstract Invasive species management in natural landscapes is generally executed at the scale of independent jurisdictions, yet the ecological processes and biodiversity to be protected from invasion occur over large spatial scales and across multiple jurisdictions. Jurisdictional land boundaries can influence the flows and dynamics of ecological systems, as well as the social systems that exist in these complex landscapes. Land management entities in large, protected area-centered ecosystems may use different approaches to address cross-boundary management challenges. To understand these differing strategies and their effects on cooperative invasive plant management, we interviewed employees with federal, county and state agencies, research organizations, nonprofits, and local stakeholder groups in two national parks and their surrounding lands in California, USA. Although all participants stressed the importance of working together, they did so along a continuum of strategies ranging from simple communication to coordination of independent efforts to active collaboration. Barriers to collaboration can be categorized as originating within or externally to the management unit, including limited resources, differing agency priorities, paperwork requirements, and lack of support by higher-level managers. Strategies to reduce barriers depend on where they originate.

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