Relevant bibliographies by topics / Invasive shrubs / Journal articles
To see the other types of publications on this topic, follow the link: Invasive shrubs.

Journal articles on the topic 'Invasive shrubs'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Invasive shrubs.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Ward, Jeffrey S., Scott C. Williams, and Megan A. Linske. "Influence of invasive shrubs and deer browsing on regeneration in temperate deciduous forests." Canadian Journal of Forest Research 48, no. 1 (January 2018): 58–67. http://dx.doi.org/10.1139/cjfr-2017-0208.

Full text
Abstract:
While both chronic white-tailed deer (Odocoileus virginianus Zimmermann) overbrowsing and invasive shrubs have been linked to native regeneration failure in temperate hardwood forests, little is known of their relative importance and possible synergistic effects. Therefore, we established three study areas in Connecticut to examine the interaction of three levels of invasive shrub control and absence or presence of deer herbivory on forest regeneration over 9 years. Five observations suggest that obtaining forest regeneration requires a comprehensive management strategy. First, competitive interference by invasive shrubs in intact thickets continued to impede forest regeneration, especially taller seedlings, after deer were excluded. Second, density of small seedlings increased following removal of the competitive interference by invasive shrubs. Third, deer browsing depressed growth of small seedlings into taller height classes. Fourth, preferential browsing reduced species richness, especially in taller seedling classes, by favoring growth of low palatability species such as beech. Lastly, if a disturbance (e.g., cutting) does not kill the root system of the invasive shrubs, the window of forest regeneration recruitment may be narrow because invasive shrubs can quickly recover. In stands with both established shrub thickets and high deer densities, invasive shrub control and multiyear reduction of deer densities are both recommended to obtain adequate forest regeneration.
APA, Harvard, Vancouver, ISO, and other styles
2

Maynard-Bean, Erynn, and Margot Kaye. "Invasive shrub removal benefits native plants in an eastern deciduous forest of North America." Invasive Plant Science and Management 12, no. 1 (March 2019): 3–10. http://dx.doi.org/10.1017/inp.2018.35.

Full text
Abstract:
AbstractIn eastern deciduous forests of North America, invasive shrubs are increasing in richness and abundance at the expense of native species across taxa. Invasive shrubs create an understory that is more dense than both recent and historical preinvasion conditions. Interest in invasive shrub removal to restore native habitat is growing, but our understanding of natural regeneration following treatment of a diverse invasive shrub community is lagging. Using an invasive shrub removal experiment, we provide insight into the effect of repeated removal of a suite of 18 invasive shrub species dominated by border privet (Ligustrum obtusifolium Siebold & Zucc.). In 2009, invasive shrubs were removed from five 20-m-diameter treatment plots, each with a paired control plot. Seven years later, we find an increase in plant diversity, native understory species abundance, and overstory tree species regeneration for individuals under a meter in height. For plants 1 to 4 m in height, the removal treatment has a positive effect on understory woody species, but there has been no change in regenerating overstory trees. A lack of overstory tree regeneration to greater heights is not surprising, given the time frame and the closed-canopy conditions. However, other factors, such as white-tailed deer (Odocoileus virginianus Zimmermann) browse, could be serving as an impediment to taller tree regeneration in the forest understory. An ambient sampling approach in unmanaged, invaded, and uninvaded forest has been used in other studies to estimate the potential impacts of invasive shrub species to native plant communities. However, in this study the ambient sampling approach underestimated the impacts of invasive shrubs compared to their experimental removal. Overall, invasive shrub removal increased plant diversity and allowed passive natural regeneration of native plants that exceeded native cover in the unmanaged, ambient forest under minimal invasive shrub abundance.
APA, Harvard, Vancouver, ISO, and other styles
3

Seburanga, Jean Leonard. "Purpose of Introduction as a Predictor of Invasiveness among Introduced Shrubs in Rwanda." Journal of Botany 2015 (January 28, 2015): 1–4. http://dx.doi.org/10.1155/2015/167186.

Full text
Abstract:
The introduced shrub flora in Rwanda was analyzed and the risk of invasion was assessed based on the species’ purposes of introduction. The results showed that more than half of invasive alien shrubs in Rwanda were introduced as ornamentals. They include Agave americana L., Bryophyllum proliferum Bowie ex Hook., Caesalpinia decapetala (Roth) Alston, Lantana camara L., and Tithonia diversifolia (Hemsley) A. Gray. However, these represented only 3.16% of the total number of introduced ornamental shrubs. At the time when the study was conducted, no introduced food crop had become invasive. Species introduced for purposes other than food or culinary use showed higher likelihood of becoming invasive.
APA, Harvard, Vancouver, ISO, and other styles
4

Möllerová, J. "Notes on invasive and expansive trees and shrubs." Journal of Forest Science 51, Special Issue (May 17, 2019): 19–23. http://dx.doi.org/10.17221/11844-jfs.

Full text
Abstract:
Expansion and invasion of plants indicate successful colonization and competitive abilities of species. There are fewer invasive and expansive woody plants than herbs. Main expansive (native species) trees and shrubs are Acer platanoides, Acer pseudoplatanus, Clematis vitalba, Crataegus sp. div., Fraxinus excelsior, Prunus spinosa, Rubus sp. div., Sambucus nigra. Main invasive (alien species) are Acer negundo, Ailanthus altissima, Amorpha fruticosa, Cytisus scoparius, Fraxinus pennsylvanica, Lycium barbarum, Mahonia aquifolium, Physocarpus opulifolius, Pinus strobus, Populus × canadensis, Prunus serotina, Quercus rubra, Rhus typhina, Robinia pseudoacacia, Symphoricarpos albus, Syringa vulgaris. Dominant characteristics of expansive and invasive species are dispersibility of seeds and capacity of vegetative propagation.
APA, Harvard, Vancouver, ISO, and other styles
5

Boyce, Richard L. "Invasive Shrubs in Kentucky." Northeastern Naturalist 17, mo7 (March 1, 2010): 1. http://dx.doi.org/10.1656/045.017.m701.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Guiden, Peter W., and John L. Orrock. "Invasive shrubs modify rodent activity timing, revealing a consistent behavioral rule governing diel activity." Behavioral Ecology 30, no. 4 (April 10, 2019): 1069–75. http://dx.doi.org/10.1093/beheco/arz050.

Full text
Abstract:
Abstract Animals adjust the timing of their activity to maximize benefits, such as access to resources, and minimize costs, such as exposure to predators. Despite many examples of invasive plants changing animal behavior, the potential for invasive plants to alter the timing of animal activity remains unexplored. In eastern North America, invasive shrubs might have particularly strong effects on animal activity timing during spring and fall, when many invasive shrubs retain their leaves long after native species’ leaves senesce. We experimentally removed an invasive shrub (buckthorn, Rhamnus cathartica) and monitored the activity timing of a ubiquitous small-mammal species (white-footed mouse, Peromyscus leucopus) in spring, summer, and fall. We captured nearly 3 times as many P. leucopus in plots invaded by R. cathartica compared with plots with R. cathartica removed, and P. leucopus were captured 2 h earlier in invaded plots. Regardless of invasion treatment, P. leucopus appear to follow a common rule to set activity timing: P. leucopus were only active below a threshold of ground-level moonlight illuminance (0.038 lux). Diel and monthly lunar cycles play an important role in regulating small-mammal activity, but our data suggest that decreased light penetration dampens the influence of moonlight illuminance in habitats invaded by R. cathartica, allowing P. leucopus to remain active throughout the night. By changing the temporal niche of ubiquitous native animals, invasive shrubs may have unappreciated effects on many ecological interactions, including processes that alter community diversity and affect human health.
APA, Harvard, Vancouver, ISO, and other styles
7

Boyce, Richard L. "Invasive Shrubs and Forest Tree Regeneration." Journal of Sustainable Forestry 28, no. 1-2 (February 11, 2009): 152–217. http://dx.doi.org/10.1080/10549810802626449.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Mauritz, M., and D. L. Lipson. "Altered phenology and temperature sensitivity of invasive annual grasses and forbs changes autotrophic and heterotrophic respiration rates in a semi-arid shrub community." Biogeosciences Discussions 10, no. 4 (April 3, 2013): 6335–75. http://dx.doi.org/10.5194/bgd-10-6335-2013.

Full text
Abstract:
Abstract. Many invasions, like the wide-spread establishment of annual grasses and forbs in semi-arid shrublands, are associated with climate change. In order to predict ecosystem carbon (C) storage it is critical that we understand how invasion affects soil respiration (Rt). Because plants and microbes have different seasonal dynamics, determining the relative contribution of autotrophic (Ra) and heterotrophic (Rh) respiration provides critical insight into soil C processes. Using automated soil respiration measurements and root exclusion cores we evaluated the moisture and temperature sensitivity of Rt and Rh and calculated the contribution of Ra in native shrub and invaded areas. Invasion increased cumulative Rt by 40% from 695 (±51) g C m−2 under shrubs to 1050 g C m−2 (±44) in invaded areas. Cumulative Rh did not change but invasion altered the seasonal pattern of Rh. Throughout the season Rt and Rh responded positively to temperature increases when soils were wet and negatively when soils were dry. Invasion increased temperature sensitivity of Rt and Rh in wet soils and decreased temperature sensitivity in dry soils. The altered temperature sensitivity of invasives was attributed largely to differences in phenology. Early phenology of invasive grasses caused rapid Ra increases early in the season; late phenology of invasive forbs resulted in the surprising maintenance of diurnal Ra and Rh signals despite high temperatures and low soil moisture. Invasion extended the respiration season of the system. Ability of the invasive community to withstand high temperatures and drought could confer greater resilience if temperature and precipitation patterns in the region change. The high contribution of Ra by invasive annuals means ecosystem C storage will depend heavily on seasonal rainfall dynamics and productivity of invasive annuals. In semi-arid ecosystems even small scale changes in plant community composition alter Rt, Ra and Rh and should be considered when attempting to predict Rt.
APA, Harvard, Vancouver, ISO, and other styles
9

Ramsfield, T. D., and M. W. P. Power. "Assessing the potential for biological control of Buddleja davidii with the fungus Chondrostereum purpureum." New Zealand Plant Protection 61 (August 1, 2008): 396. http://dx.doi.org/10.30843/nzpp.2008.61.6876.

Full text
Abstract:
Buddleja davidii is a perennial woody shrub that is highly invasive in many parts of the world including New Zealand This study was conducted to assess the potential for inundative biological control of this weed using Chondrostereum purpureum a wound invasive basidiomycete The fungus has been registered for woody weed control in Canada and the Netherlands and is present throughout New Zealand Mature B davidii shrubs planted at the Scion campus Rotorua were cut 30 cm from the ground and the cut surface of the stems was immediately inoculated with C purpureumcolonised malt extract agar (MEA) and sealed with Parafilm There were four replicate shrubs for each of three isolates and the control (inoculation with sterile MEA) One year following inoculation no fruiting bodies of C purpureum have been observed on the treated B davidii Although the inoculated stems appear dead most replicates have extensive epicormic shoot development and are forming coppices
APA, Harvard, Vancouver, ISO, and other styles
10

Madritch, Michael D., and Richard L. Lindroth. "Removal of invasive shrubs reduces exotic earthworm populations." Biological Invasions 11, no. 3 (May 13, 2008): 663–71. http://dx.doi.org/10.1007/s10530-008-9281-7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
11

Frank, Graham, Michael Saunders, and Michael Jenkins. "Short-Term Vegetation Responses to Invasive Shrub Control Techniques for Amur Honeysuckle (Lonicera maackii [Rupr.] Herder)." Forests 9, no. 10 (September 30, 2018): 607. http://dx.doi.org/10.3390/f9100607.

Full text
Abstract:
Invasive shrubs in forest understories threaten biodiversity and forest regeneration in the eastern United States. Controlling these extensive monotypic shrub thickets is a protracted process that slows the restoration of degraded forest land. Invasive shrub removal can be accelerated by using forestry mulching heads, but evidence from the western United States indicates that mulching heads can promote exotic species establishment and mulch deposition can reduce native plant species abundance. We compared the effectiveness of the mulching head and the “cut-stump” method for controlling the invasive shrub Amur honeysuckle (Lonicera maackii), as well as their impacts on native plant community recovery, in mixed-hardwood forests of Indiana. After two growing seasons, mulching head treatment resulted in greater L. maackii regrowth and regeneration. The recovery of native plant abundance and diversity following shrub removal did not differ between the two methods. However, mulch deposition was associated with increased abundance of garlic mustard (Alliaria petiolata), an invasive forb. Increasing mulching head treatment depth reduced L. maackii regrowth, but additional study is needed to determine how it affects plant community responses. The mulching head is a promising technique for invasive shrub control and investigating tradeoffs between reducing landscape-scale propagule pressure and increased local establishment will further inform its utility.
APA, Harvard, Vancouver, ISO, and other styles
12

Carvalho, Pedro, Rui Martins, António Portugal, and M. Teresa Gonçalves. "Do mycorrhizal fungi create below-ground links between native plants and <i>Acacia longifolia</i>? A case study in a coastal maritime pine forest in Portugal." Web Ecology 18, no. 1 (June 19, 2018): 105–14. http://dx.doi.org/10.5194/we-18-105-2018.

Full text
Abstract:
Abstract. Maritime pine forests are a major ecosystem throughout the Portuguese coast and are severely affected by the invasion of Acacia longifolia. The presented study investigated the diversity of ectomycorrhizal fungi (ECM) of major plant species in these ecosystems to find possible links between Pinus pinaster, three native Cistaceae shrubs and the Acacia invasive species. We successfully identified 13 ECM fungal taxa. Within those, two species from the order Helotiales were found in all plant species, and over half of the fungal ECM species found in Pinus pinaster were also common to the Cistaceae shrubs. Network analysis points to the Cistaceae shrubs having a central role in these below-ground communities, therefore enforcing the idea that they are key to these communities and should not be underestimated. Our results also point to the evolving role of invasive plant species in the ecosystem dynamics in the rhizosphere, which host fungal species that are common to native plants, although it is not yet clear whether these fungal taxa are native or a consequence of the presence of Acacia longifolia.
APA, Harvard, Vancouver, ISO, and other styles
13

Schulte, Lisa A., Erik C. Mottl, and Brian J. Palik. "The association of two invasive shrubs, common buckthorn (Rhamnus cathartica) and Tartarian honeysuckle (Lonicera tatarica), with oak communities in the midwestern United States." Canadian Journal of Forest Research 41, no. 10 (October 2011): 1981–92. http://dx.doi.org/10.1139/x11-112.

Full text
Abstract:
Oak forests throughout North America are declining due to changes in disturbance regimes that have led to increased competition from other tree and shrub species. We evaluated associations between oak regeneration, the occurrence of two common invasive shrubs (common buckthorn ( Rhamnus cathartica L.) and Tartarian honeysuckle ( Lonicera tatarica L.)), and forest edges in oak forests in a portion of the midwestern United States where bur ( Quercus macrocarpa Michx.), red ( Quercus rubra L.), and white oak ( Quercus alba L.) were historically dominant. We found poor recruitment of oaks in comparison to other, more shade-tolerant tree species. Results further revealed a strong stand-scale association between bur oak, open canopy conditions, high soil nutrient levels, and the presence of common buckthorn and Tartarian honeysuckle; these same site characteristics were disassociated with red and white oak. Within red and white oak stands, however, the presence of the invasive shrubs was more pronounced near forest edges. While oak recruitment is hampered throughout stands, our research suggests that predominant constraints may vary based on soil and light gradients found along forest edges.
APA, Harvard, Vancouver, ISO, and other styles
14

Owen, Suzanne M., Carolyn Hull Sieg, and Catherine A. Gehring. "Rehabilitating Downy Brome (Bromus tectorum)–Invaded Shrublands Using Imazapic and Seeding with Native Shrubs." Invasive Plant Science and Management 4, no. 2 (April 2011): 223–33. http://dx.doi.org/10.1614/ipsm-d-10-00054.1.

Full text
Abstract:
AbstractRehabilitation of downy brome–infested shrublands is challenging once this invasive grass dominates native communities. The effectiveness of imazapic herbicide in reducing downy brome cover has been variable, and there is uncertainty about the impacts of imazapic on native species. We used a before-after-control-impact (BACI) field experiment and greenhouse studies to (1) determine if imazapic herbicide applied at 132 g ai ha−1 (8 oz/ac−1) and seeding with two native shrub species (Wyoming big sagebrush [Artemisia tridentata] and Mexican cliffrose [Purshia mexicana]) reduced downy brome cover and promoted shrub establishment, (2) assess potential effects of imazapic on nontarget plant species and plant community composition, and (3) determine if imazapic affected downy brome or seeded shrub species when applied at different developmental stages. Seeding shrubs, alone, or in combination with imazapic application, did not significantly increase shrub density, possibly because of droughty conditions. In the field, imazapic reduced downy brome cover by 20% and nontarget forb cover by 25% and altered plant community composition the first year after treatment. Imazapic was lethal to downy brome at all growth stages in the greenhouse and reduced shrub germination by 50 to 80%, but older shrub seedlings were more tolerant of the herbicide. We conclude that a one-time application of imazapic combined with seeding shrubs was only slightly effective in rehabilitating areas with high downy brome and thatch cover and resulted in short-term impacts to nontarget species. These results highlight the need to treat downy brome infestations before they become too large. Also, removing thatch prior to treating with imazapic, although likely lethal to the native shrubs we studied, could increase the effectiveness of imazapic.
APA, Harvard, Vancouver, ISO, and other styles
15

Wolkovich, Elizabeth M., Douglas T. Bolger, and Kathryn L. Cottingham. "Invasive grass litter facilitates native shrubs through abiotic effects." Journal of Vegetation Science 20, no. 6 (December 2009): 1121–32. http://dx.doi.org/10.1111/j.1654-1103.2009.01110.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
16

Buckley, Yvonne M., Paul Downey, Simon V. Fowler, Richard Hill, Jane Memmot, Hernán Norambuena, Mike Pitcairn, et al. "ARE INVASIVES BIGGER? A GLOBAL STUDY OF SEED SIZE VARIATION IN TWO INVASIVE SHRUBS." Ecology 84, no. 6 (June 2003): 1434–40. http://dx.doi.org/10.1890/0012-9658(2003)084[1434:aibags]2.0.co;2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
17

Kuebbing, Sara E., Aimée T. Classen, and Daniel Simberloff. "Two co-occurring invasive woody shrubs alter soil properties and promote subdominant invasive species." Journal of Applied Ecology 51, no. 1 (September 10, 2013): 124–33. http://dx.doi.org/10.1111/1365-2664.12161.

Full text
APA, Harvard, Vancouver, ISO, and other styles
18

Shrestha, Pragati, and Jessica D. Lubell. "Suitability of Eight Northeastern U.S. Native Shrubs as Replacements for Invasive Plants in a Difficult Landscape Site with White-tailed Deer Pressure." HortTechnology 25, no. 2 (April 2015): 171–76. http://dx.doi.org/10.21273/horttech.25.2.171.

Full text
Abstract:
Nursery and landscape professionals are interested in white-tailed deer (Odocoileus virginianus)–resistant native plants to replace invasive species used in difficult landscape sites, such as parking lot islands, which are dry, nutrient-poor, and exposed to sun and heat. Eight native shrubs [creeping sand cherry (Prunus pumila var. depressa), elderberry (Sambucus canadensis), gray dogwood (Cornus racemosa), highbush blueberry (Vaccinium corymbosum), round leaf dogwood (Cornus rugosa), northern spicebush (Lindera benzoin), sweetbells (Eubotrys racemosa), and virginia rose (Rosa virginiana)] were planted in a large commuter parking lot on the University of Connecticut campus to evaluate their suitability for use in difficult landscapes. The non-native, invasive shrubs ‘Compactus’ winged euonymus (Euonymus alatus) and ‘Crimson Pygmy’ japanese barberry (Berberis thunbergii) were also planted as controls representing non-native species typically planted in such sites. Aesthetic quality ratings for sweetbells matched the controls (rating of 4.5 out of 5.0) and plants exhibited a high level of white-tailed deer resistance. Virgina rose and creeping sand cherry had similar aesthetic quality to controls, despite light grazing of plants by white-tailed deer. Elderberry was damaged by moderate white-tailed deer grazing and snow load, but plants regenerated to 485% of initial size in one growing season with white-tailed deer exclusion. Gray dogwood, round leaf dogwood, and northern spicebush exhibited the least resistance to white-tailed deer grazing. Both dogwood species had lower aesthetic quality than the controls, and round leaf dogwood had the lowest survival rate (68%) after 2 years. However, several individuals of gray dogwood, round leaf dogwood, and northern spicebush that were less heavily damaged by white-tailed deer grew into attractive shrubs after white-tailed deer exclusion. Highbush blueberry had significantly lower aesthetic quality than controls and only 75% survival after 2 years, indicating that this species is an unsuitable replacement for invasives in difficult landscape sites. This study identified the underused native shrubs sweetbells, virginia rose, and creeping sand cherry as suitable replacements for invasives in difficult landscape sites with white-tailed deer pressure.
APA, Harvard, Vancouver, ISO, and other styles
19

Richardson, David M., and Marcel Rejmánek. "Trees and shrubs as invasive alien species - a global review." Diversity and Distributions 17, no. 5 (August 8, 2011): 788–809. http://dx.doi.org/10.1111/j.1472-4642.2011.00782.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
20

Clark, Robert E., and Chad L. Seewagen. "Invasive Japanese Barberry, Berberis thunbergii (Ranunculales: Berberidaceae) Is Associated With Simplified Branch-Dwelling and Leaf-Litter Arthropod Communities in a New York Forest." Environmental Entomology 48, no. 5 (August 28, 2019): 1071–78. http://dx.doi.org/10.1093/ee/nvz095.

Full text
Abstract:
Abstract Arthropod food webs can be indirectly impacted by woody plant invasions, with cascading consequences for higher trophic levels. There are multiple bottom-up pathways by which invasive plants can alter food webs: above-ground interactions based on plant-herbivore associations and below-ground at the interface of leaf-litter and soil food webs. We compared arthropod community composition in these two food web dimensions in a New York forest that has been heavily invaded by nonnative Japanese barberry. Using two sampling protocols, we compared arthropod community composition on Japanese barberry shrubs to multiple species of native host shrubs and then compared leaf-litter arthropod assemblages between forest patches with exceptionally high Japanese barberry densities and those with relatively little to no Japanese barberry present. Fitting with trends in other woody shrub invasions, arthropod species richness was significantly lower in the leaf litter around Japanese barberry and on Japanese barberry plants themselves. Although overall arthropod abundance was also significantly lower on and in the leaf litter around Japanese barberry than on and around native shrubs, total biomass did not differ due to the taxa associated with Japanese barberry tending to be larger-bodied. We observed a dramatic reduction in predatory arthropods in response to both bottom-up pathways, particularly among ants and spiders. Our results show that Japanese barberry-invaded habitats may be experiencing trophic downgrading as result of lower numbers of generalist predators like spiders and ants, which may have rippling effects up the food web to insectivorous animals and their predators.
APA, Harvard, Vancouver, ISO, and other styles
21

McEwan, Ryan W., Lynne K. Rieske, and Mary A. Arthur. "Potential interactions between invasive woody shrubs and the gypsy moth (Lymantria dispar), an invasive insect herbivore." Biological Invasions 11, no. 4 (July 3, 2008): 1053–58. http://dx.doi.org/10.1007/s10530-008-9316-0.

Full text
APA, Harvard, Vancouver, ISO, and other styles
22

Grice, A. C., S. D. Campbell, J. R. McKenzie, L. V. Whiteman, and B. V. Lukitsch. "Size-biomass relationships for Australian populations of the invasive rangeland shrub Parkinsonia aculeata L." Rangeland Journal 24, no. 2 (2002): 207. http://dx.doi.org/10.1071/rj02011.

Full text
Abstract:
Parkinsonia aculeata is an invasive, introduced shrub that is found in all mainland states of Australia except Victoria. It is especially prevalent north of the tropic of Capricorn. Size-biomass relationships were established for this species using data from 167 shrubs spread across eight sites in the Northern Territory and north-eastern Queensland. Above-ground dry weight (W, kg) can be predicted from plant height (H, m), canopy diameter (D, m) or stem cross-sectional area (A, cm2) using the equations: W = 0.025 H4.47 W = 0.091 D3.64 W = 0.022 A1.61 These relationships are linear when plotted on log-log scales. Although there was a significant effect of "site" on the log-log relationships between above-ground dry weight and size variables, the amount of information lost by not using site-specific equations is relatively small. These results provide reliable methods for estimating above-ground biomass in this species, the most robust being based on measurements of stem diameter at 20 cm above ground level.
APA, Harvard, Vancouver, ISO, and other styles
23

Lubell, Jessica D. "Evaluating Landscape Performance of Six Native Shrubs as Alternatives to Invasive Exotics." HortTechnology 23, no. 1 (February 2013): 119–25. http://dx.doi.org/10.21273/horttech.23.1.119.

Full text
Abstract:
There is increased interest in using native plant alternatives to invasive species for landscaping. Several invasive shrubs are used extensively in landscaping since they perform well in challenging landscapes, such as parking lot island plantings, which are dry, nutrient-poor, and sun and heat exposed. This study evaluated the landscape suitability of six underused Connecticut native shrubs [american filbert (Corylus americana), buttonbush (Cephalanthus occidentalis), northern bush honeysuckle (Diervilla lonicera), steeplebush (Spiraea tomentosa), sweet fern (Comptonia peregrina), and sweet gale (Myrica gale)] by planting them in a large commuter parking lot on the University of Connecticut (UConn) campus in Storrs. Two nonnative invasive species, ‘Crimson Pygmy’ japanese barberry (Berberis thunbergii) and ‘Compactus’ winged euonymus (Euonymus alatus), were also planted as controls. Buttonbush, sweet fern, and sweet gale performed as well as controls and had aesthetic quality index (AQI) ratings similar to controls throughout the study, which spanned three growing seasons. These findings were surprising for buttonbush and sweet gale, which are found in the wild occupying predominantly wet areas. Buttonbush plants readily established at the site as indicated by a 930% increase in plant size over the first growing season. Sweet fern and sweet gale produced attractive, dense, and uniform mounds consistently throughout the study. Northern bush honeysuckle and american filbert were slower to establish, but by the second and third year, respectively, plants were highly attractive and had AQI ratings similar to controls. Despite its attractive floral display, steeplebush performed poorly and developed powdery mildew (Sphaerotheca) symptoms in the first and second years, which contributed to a lower AQI compared with controls. Aesthetic quality for american filbert, buttonbush, and steeplebush was reduced because of variation resulting from seed propagation. For certain native species, plants received from the nursery were not robust, which may have had a greater influence on establishment and early performance than their inherent landscape adaptability. This study identified five underused native shrubs that are adaptable and able to replace invasive plants in landscapes.
APA, Harvard, Vancouver, ISO, and other styles
24

Midgley, G. F., M. C. Rutherford, G. W. Davis, and J. de W. Bosenberg. "Photosynthetic Responses of Heliophilous Rhus Species to Environmental Modification by Invasive Shrubs." Functional Ecology 6, no. 3 (1992): 334. http://dx.doi.org/10.2307/2389525.

Full text
APA, Harvard, Vancouver, ISO, and other styles
25

Ward, Jeffrey, Scott Williams, and Megan Linske. "Independent Effects of Invasive Shrubs and Deer Herbivory on Plant Community Dynamics." Forests 8, no. 1 (December 22, 2016): 2. http://dx.doi.org/10.3390/f8010002.

Full text
APA, Harvard, Vancouver, ISO, and other styles
26

Phillips, Rose Neumeyer, and Michaeleen E. Gerken Golay. "Effects of Invasive Shrubs on the Herbaceous Community in a Mixed Forest." Ecological Restoration 35, no. 3 (August 3, 2017): 208–10. http://dx.doi.org/10.3368/er.35.3.208.

Full text
APA, Harvard, Vancouver, ISO, and other styles
27

Smith, Susan B., Samantha A. DeSando, and Todd Pagano. "The Value of Native and Invasive Fruit-Bearing Shrubs for Migrating Songbirds." Northeastern Naturalist 20, no. 1 (April 2013): 171–84. http://dx.doi.org/10.1656/045.020.0114.

Full text
APA, Harvard, Vancouver, ISO, and other styles
28

Edwards, Kaisha M., Christine Schlesinger, Mark K. J. Ooi, Kris French, and Ben Gooden. "Invasive grass affects seed viability of native perennial shrubs in arid woodlands." Biological Invasions 21, no. 5 (February 6, 2019): 1763–74. http://dx.doi.org/10.1007/s10530-019-01933-x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
29

Burda, R. I., and S. N. Koniakin. "The non-native woody species of the flora of Ukraine: Introduction, naturalization and invasion." Biosystems Diversity 27, no. 3 (August 15, 2019): 276–90. http://dx.doi.org/10.15421/011937.

Full text
Abstract:
The process of invasion, naturalization, dispersion and invasive activity of non-native woody species in 5 regional floras, 5 urban floras and over 30 floras of the protected areas is discussed. It has been established that 182 non-native species out of 95 genera and 45 families are currently at different naturalization stages in the spontaneous flora of Ukraine. In terms of life-forms, they may be divided as follows: trees – 41%, shrubs – 35%, trees/shrubs – 15%, lianas – 9%. Most species spread both via seed dispersal and the vegetative way – 56%, using only seed dispersal – 42%, only the vegetative way – 2%. According to the preliminary rating of species-wise invasive activity, 71 species (40%) have naturalized completely, among them 20 invasive species, including 12 transformer species, 29 potentially invasive species, and 22 naturalized species which demonstrate no invasive tendencies. The initial stages of invasion of 111 species are as follows: introduction – 9%, survival – 36%, adaptation of the reproductive sphere – 28%, establishment, formative of local populations – 27%. In terms of dispersion, non-naturalized species are divided as follows: rare – 45%, local – 16%, sporadic – 6%, unique – 12%, spreading under control beyond collections and expositions in botanical gardens and arboretums – 21%. Twelve transformer species, the greatest threat to local diversity, are Acer negundo, Ailanthus altissima, Amorpha fruticosa, Bupleurum fruticosum, Elaeagnus angustifolia, E. rhamnoides, Fraxinus ornus, Parthenocissus quinquefolia, P. vitacea, Robinia pseudoacacia, Rhamnus alaternus, Salix × blanda and 8 invasive proper species: Berberis aquifolia, Colutea orientalis, Daphne laureola, Prunus cerasifera, P. serotina, Quercus ilex, Viburnum tinus, Vitis vinifera. The list of alien species, most widespread in 50 regions of Europe, includes Robinia pseudoacacia (42 regions), Ailanthus altissima (40), Acer negundo (38), Prunus cerasus (34), Quercus rubra (34), Rosa rugosa (34), Prunus domestica (31). The mitigation of the impacts of these species on local biodiversity is possible via the restoration of local native plant communities, land use organization, strict selection of introduced species prior to the introduction, culture of planting management, preventive measures and extending awareness and sharing of information about plant invasions. Therefore, Ukraine’s spontaneous flora is notable for the active process of naturalization of non-native woody species with considerable involvement of invasive alien species. This is the first and preliminary evaluation of the invasive activity of woody species in Ukraine’s flora. The manifestations of the global tendency of increased involvement and invasive activity of alien woody species in domestic flora have been confirmed. These conclusions are also relevant for elaborating the system of preventive, containing and mitigating measures regarding plant invasions in Ukraine.
APA, Harvard, Vancouver, ISO, and other styles
30

Vieites-Blanco, Cristina, and Serafín J. González-Prieto. "Invasiveness, ecological impacts and control of acacias in southwestern Europe – a review." Web Ecology 20, no. 2 (July 9, 2020): 33–51. http://dx.doi.org/10.5194/we-20-33-2020.

Full text
Abstract:
Abstract. The most prolific acacias in southern Europe (Acacia dealbata, A. melanoxylon and A. longifolia) are rapidly spreading in its westernmost area: Portugal and NW Spain, where congeners with invasion potential are already established. We performed a bibliographic search of acacia invasions in southern Europe and used spatial data on acacia distribution and abiotic parameters in Iberia to check the influence of abiotic factors on acacia invasion. According to our results, in Iberia A. dealbata and A. melanoxylon seem limited by high soil pH (pHCaCl2>5.5), frequent frosts (>21 to 40 d yr−1) and low annual precipitation (<500 to 1000 mm); data were inconclusive for A. longifolia, while A. saligna prefers neutral soils in the driest and warmest areas. The percentage of area occupied by A. dealbata and A. melanoxylon increases significantly with the percentage of burnt surface. In the literature, acacias' invasiveness is usually attributed to their high resprouting and seeding capacity and to native exclusion through their allelopathic potential; symbiotic promiscuity with rhizobia; high environmental plasticity; and adaptation to burnt, cleared and resource-poor land. However, it is unknown how acacias became so invasive in western Iberia, where native Fabaceae shrubs with similar ecological traits (and invaders outside their natural range) are abundant. Invasive acacias can modify fire and water regimes, aboveground biodiversity, and topsoil characteristics (microbial communities, pH, organic matter and macronutrients levels); nevertheless, sound comparisons with mature stands of Iberian legumes for these and other soil properties (N fluxes, micronutrients) are lacking. As several acacias outcompete Iberian Fabaceae shrubs partly thanks to enemy release, the introduction of biocontrol agents (as for A. longifolia in Portugal) can be useful for invasion control.
APA, Harvard, Vancouver, ISO, and other styles
31

Crombie, M. D., R. R. Germain, and P. Arcese. "Nest-site preference and reproductive performance of Song Sparrows (Melospiza melodia) in historically extant and colonist shrub species." Canadian Journal of Zoology 95, no. 2 (February 2017): 115–21. http://dx.doi.org/10.1139/cjz-2016-0189.

Full text
Abstract:
Many studies report mixed results on the influence of invasive plants on native animals, partly due to uncertainties about habitat preference and reproductive performance in native animals before and after plant invasion. We used vegetation surveys 20 years apart and 18 years of breeding data from Song Sparrows (Melospiza melodia (A. Wilson, 1810)) to compare nest-site preference and reproductive performance during the colonization of Mandarte Island, British Columbia, by one shrub species native to the region but historically absent from the island (red elderberry, Sambucus racemosa L.) and another species that is exotic to North America (Himalayan blackberry, Rubus armeniacus Focke = Rubus bifrons Vest). Nest-site preference declined where red elderberry increased but was unrelated to change in the cover of Himalayan blackberry. Song Sparrows nested in trailing blackberry (Rubus ursinus Cham. and Schltdl.) and its exotic congener Himalayan blackberry in preference to two common shrubs native to Mandarte Island (Nootka rose, Rosa nutkana C. Presl; snowberry, Symphoricarpos albus (L.) S.F. Blake) and built just 1 of 1051 nests in red elderberry. In contrast, reproductive performance was similar in all shrub species used regularly as nest substrates. Our results show that Song Sparrow nest-site preference and reproductive performance were independent of plant species origin.
APA, Harvard, Vancouver, ISO, and other styles
32

Cleary, D. F. R. "Diversity and composition of plants, butterflies and odonates in an Imperata cylindrica grassland landscape in East Kalimantan, Indonesia." Journal of Tropical Ecology 32, no. 6 (October 4, 2016): 555–60. http://dx.doi.org/10.1017/s026646741600050x.

Full text
Abstract:
Abstract:In Indonesia and elsewhere, Imperata cylindrica grassland now covers millions of hectares of land previously covered by rain forest. In the present study, shrubs, trees and climbers were recorded in sixteen 10 × 20-m plots and herb cover (ferns, grasses and herbaceous dicots) estimated in nested 2 × 2-m subplots. Butterflies and odonates were netted along 300-m transects. All plots and transects were randomly allocated to a 450 ha, I. cylindrica-dominated landscape. A total of 43 shrub, tree and climber, 16 herb, 67 butterfly and 30 odonate species were recorded. Shrubs, trees and climbers were present throughout the study area, but basal area was very low and mainly consisted of invasive species. Imperata cylindrica covered an estimated 65% of the area with other plant species or bare soil covering the remainder. Butterfly and odonate communities mainly consisted of species with large geographic distributions, but some recorded species had more limited distributions. The latter were, however, species known to associate with perturbed forest environments. Variation in the composition of butterflies and odonates was also related to variation in habitat structure (e.g. altitude and slope) and plant composition. Plant composition in particular appeared to structure both butterfly and odonate communities.
APA, Harvard, Vancouver, ISO, and other styles
33

Ansley, R. James, and G. Allen Rasmussen. "Managing Native Invasive Juniper Species Using Fire." Weed Technology 19, no. 3 (September 2005): 517–22. http://dx.doi.org/10.1614/wt-04-098r1.1.

Full text
Abstract:
Junipers (Juniperus spp.) are native woody shrubs that have expanded beyond their normal historical ranges in the western and southwestern United States since the late 1800s. Most ecologists and resource managers agree that juniper has become a deleterious native invasive plant that threatens other vegetation ecosystems, such as grasslands, through a steady encroachment and ultimate domination. The use of fire in managing junipers is based on a management goal to increase the disturbance return interval and thereby reduce the abundance and/or competitive impact of juniper in an ecosystem. In this paper, we discuss rates of juniper encroachment in relation to presettlement fire regimes, juniper encroachment and soil health, postfire vegetation responses, and long-term potential of different juniper treatment scenarios that involve prescribed fire.
APA, Harvard, Vancouver, ISO, and other styles
34

Arevilca, Aminta, Luis Elissetche, Michael Scanlin, Sara Stephens, Hsiao-Hsuan Wang, and William Grant. "Rapidly Increasing Invasion of Eastern Texas Forestlands by the Most Prevalent Invasive Shrubs: Chinese and European Privets." Southeastern Naturalist 15, sp9 (December 2016): 61–67. http://dx.doi.org/10.1656/058.015.sp908.

Full text
APA, Harvard, Vancouver, ISO, and other styles
35

Balshor, Bailey J., Matthew S. Garrambone, Paige Austin, Kathleen R. Balazs, Claudia Weihe, Jennifer B. H. Martiny, Travis E. Huxman, Johannah R. McCollum, and Sarah Kimball. "The effect of soil inoculants on seed germination of native and invasive species." Botany 95, no. 5 (May 2017): 469–80. http://dx.doi.org/10.1139/cjb-2016-0248.

Full text
Abstract:
Successful reintroduction of native species through ecological restoration requires understanding the complex process of seed germination. Soil microbes play an important role in promoting native establishment and are often added to restoration sites during seed sowing. We tested the role of soil- and lab-grown bacterial inoculants on germination timing and percent germination for 19 species of plants commonly found in coastal California. Each species exhibited a different response to the inoculant treatments, but overall time-to-germination was longer and percent germination was lower with the soil inoculant compared with the control or other treatments. The invasive species in our study had the highest percent germination of all species and germinated faster than all native shrubs. Germination timing was negatively correlated with percent germination and with seed mass. Our results suggest that lab-grown inoculant and chemical treatment are effective at increasing germination in some native species, whereas soil inoculant is not. Given differences in germination timing between native and invasive species, restoration practitioners could consider using herbicide to treat areas seeded with native shrubs immediately following germination of invasive species without harming most natives, although germination timing and herbicides need further study in relation to microbial effects on seed germination.
APA, Harvard, Vancouver, ISO, and other styles
36

G, Uma, Jagathes Kumar S, and Balasubramaniam V. "INVASIVE ALIEN WEEDS AND THEIR ETHNO-BOTANICAL IMPORTANCE OF VIJAYAMANGALAM VILLAGE, ERODE DISTRICT." Kongunadu Research Journal 1, no. 2 (December 30, 2014): 121–25. http://dx.doi.org/10.26524/krj52.

Full text
Abstract:
The present study deals with comprehensive list of Invasive alien plants of Vijayamangalam village,Perundurai taluk, Erode district with background information on family, habit and nativity. A total of 50invasive alien species under 40 genera, belonging to 18 families have been recorded. While in life formanalysis, the herbs (40 species) are dominant, followed by shrubs (6 species), Climber (2 species), Trees (2species)
APA, Harvard, Vancouver, ISO, and other styles
37

Bates, Jonathan D., Robert N. Sharp, and Kirk W. Davies. "Sagebrush steppe recovery after fire varies by development phase of Juniperus occidentalis woodland." International Journal of Wildland Fire 23, no. 1 (2014): 117. http://dx.doi.org/10.1071/wf12206.

Full text
Abstract:
Woodland ecosystems of the world have been changed by land use demands, altered fire regimes, invasive species and climate change. Reduced fire frequency is recognised as a main causative agent for Pinus–Juniperus L. (piñon–juniper) expansion in North American woodlands. Piñon–juniper control measures, including prescribed fire, are increasingly employed to restore sagebrush steppe communities. We compared vegetation recovery following prescribed fire on Phase 2 (mid-succession) and Phase 3 (late-succession) Juniperus occidentalis Hook. (western juniper) woodlands in Oregon. The herbaceous layer on Phase 2 sites was comprised of native perennial and annual vegetation before and after fire. On Phase 3 sites the herbaceous layer shifted from native species to dominance by invasive Bromus tectorum L. (cheatgrass). After fire, shrubs on Phase 2 sites were comprised of sprouting species and Ceanothus velutinus Dougl. (snowbrush). On Phase 3 woodland sites the shrub layer was dominated by C. velutinus. The results suggest that Phase 2 sites have a greater likelihood of recovery to native vegetation after fire and indicate that sites transitioning from Phase 2 to Phase 3 woodlands cross a recovery threshold where there is a greater potential for invasive weeds, rather than native vegetation, to dominate after fire.
APA, Harvard, Vancouver, ISO, and other styles
38

Bhattarai, Pradeep. "Threats on Grassland Ecosystem Services: A Case from Shuklaphanta Wildlife Reserve." Nepal Journal of Science and Technology 13, no. 2 (March 8, 2013): 159–66. http://dx.doi.org/10.3126/njst.v13i2.7729.

Full text
Abstract:
Change in ecosystem balance is increasing rapidly by means of humanly devised over and above natural activities to be precise land use change, deforestation, species invasion, and even the lack of sustainable management within and beyond protected area. Invasion of woody perennials and invasive alien species, human intervention together with improper management practices possibly generated substantial impacts on all major ecosystems of Shuklaphanta grassland. To acquire baseline information and understand ecosystem invasion, random line transects of 1000m were taken to get quadrats of 1m2, 25 m2 and 100 m2 in four different habitats within Shuklaphanta grassland. The result showed that the importance value index (IVI) and prominence value (PV) of woody perennials were high coupled with significant PV of invasive species. Ecosystem services change was prevalent in the study area and high possibility to change into forest vegetation. Invasive species, shrubs, and large trees encroachment consequently invited alteration challenge on preferable habitats formed on assemblage of major grass species. The disrupted ecosystem services amplified pressure on both prey and prey base species including swamp deer, antelope, one-horned rhinoceros, Asiatic elephant, royal Bengal tiger, Bengal florican and other threatened species. Nepal Journal of Science and Technology Vol. 13, No. 2 (2012) 159-166 DOI: http://dx.doi.org/10.3126/njst.v13i2.7729
APA, Harvard, Vancouver, ISO, and other styles
39

Sheikh, Darakhsa Kauser, and Ashwini Kumar Dixit. "Occurrence of Invasive Plant in three phytogeographical region of Bilaspur district of Chhattisgarh." Annals of Plant Sciences 6, no. 12 (December 1, 2017): 1872. http://dx.doi.org/10.21746/aps.2017.6.12.13.

Full text
Abstract:
The present study deals with comprehensive list of invasive species in the flora of Bilaspur district of Chhattisgarh, India with background information of family, nativity, mode of introduction, flowering and fruiting. 83 species of plant belongs to 26 families were documented as invasive plant in all three phytogeographical regions (agricultural land, urban land and protected land). Both native and invasive plants were found in the same region, but the occurrence of invasive species were found high in the urban land (34.58%) in comparison with protected land (29.16%) and agriculture land (25%). Habit wise analysis of invasive species showed 84.52% herbs, followed by 13.09% shrubs and 2.38% climbers. Maximum proportion of invasive plant are native to Tropical America and belongs to family Asteraceae (16), followed by Malvaceae (9), Euphorbiaceae (8), Fabaceae (6), Solanaceae (5), Convolvulaceae (4) and Lamiaceae (4).
APA, Harvard, Vancouver, ISO, and other styles
40

Schmidt, Kenneth A., Lisa C. Nelis, Nathan Briggs, and Richard S. Ostfeld. "INVASIVE SHRUBS AND SONGBIRD NESTING SUCCESS: EFFECTS OF CLIMATE VARIABILITY AND PREDATOR ABUNDANCE." Ecological Applications 15, no. 1 (February 2005): 258–65. http://dx.doi.org/10.1890/03-5325.

Full text
APA, Harvard, Vancouver, ISO, and other styles
41

Caplan, J. S., R. D. Whitehead, A. E. Gover, and J. C. Grabosky. "Extended leaf phenology presents an opportunity for herbicidal control of invasive forest shrubs." Weed Research 58, no. 4 (April 17, 2018): 244–49. http://dx.doi.org/10.1111/wre.12305.

Full text
APA, Harvard, Vancouver, ISO, and other styles
42

Fridley, Jason D., and Alaä Craddock. "Contrasting growth phenology of native and invasive forest shrubs mediated by genome size." New Phytologist 207, no. 3 (March 24, 2015): 659–68. http://dx.doi.org/10.1111/nph.13384.

Full text
APA, Harvard, Vancouver, ISO, and other styles
43

Rejmánek, Marcel, and David M. Richardson. "Trees and shrubs as invasive alien species - 2013 update of the global database." Diversity and Distributions 19, no. 8 (April 23, 2013): 1093–94. http://dx.doi.org/10.1111/ddi.12075.

Full text
APA, Harvard, Vancouver, ISO, and other styles
44

Maynard-Bean, Erynn, Margot Kaye, Tyler Wagner, and Eric P. Burkhart. "Citizen scientists record novel leaf phenology of invasive shrubs in eastern U.S. forests." Biological Invasions 22, no. 11 (August 9, 2020): 3325–37. http://dx.doi.org/10.1007/s10530-020-02326-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
45

Edalgo, Jennifer A., Holly M. McChesney, Jason P. Love, and James T. Anderson. "Microhabitat use by white-footed mice Peromyscus leucopus in forested and old-field habitats occupied by Morrow’s honeysuckle Lonicera morrowii." Current Zoology 55, no. 2 (April 1, 2009): 111–22. http://dx.doi.org/10.1093/czoolo/55.2.111.

Full text
Abstract:
Abstract We quantified microhabitat use by white-footed mice Peromyscus leucopus in forest and old-field habitats occupied by Morrow’s honeysuckle Lonicera morrowii, an invasive exotic shrub imported from Japan. Microhabitat characteristics were compared between trails used by mice (n = 124) and randomly selected trails (n = 127) in 4 study plots located at Fort Necessity National Battlefield, Farmington, Pennsylvania, USA. We compared 10 microhabitat variables between used and random trails using non-metric multidimensional scaling (NMDS) and classification and regression tree (CART) analysis. Trails used by mice were statistically different from randomly selected trails in both forested plots (P < 0.008) and old-field plots (P < 0.001). In the forested plots, trails of white-footed mice were more often associated with a greater percent cover (% cover) of coarse woody debris (CWD) than were randomly selected trails. In the old-field plots, mouse trails were commonly characterized by having a lower % cover of exotic herbaceous vegetation, a greater % cover of shrubs, and a greater % cover of Morrow’s honeysuckle than randomly selected trails. Our study indicates that white-footed mice do not move randomly and prefer areas of high structural complexity, thereby showing significant microhabitat preference. The preference of white-footed mice for areas with a relatively high percent cover of Morrow’s honeysuckle could 1) be a factor in the aggressive nature of the exotic honeysuckle shrub’s spread throughout the Battlefield or 2) cause the shrub to spread even faster into adjacent areas not yet occupied by Morrow’s honeysuckle.
APA, Harvard, Vancouver, ISO, and other styles
46

Schuster, Michael J., Paul Bockenstedt, Peter D. Wragg, and Peter B. Reich. "Fosamine ammonium impacts on the targeted invasive shrub Rhamnus cathartica and non-target herbs." Invasive Plant Science and Management 13, no. 3 (June 5, 2020): 210–15. http://dx.doi.org/10.1017/inp.2020.17.

Full text
Abstract:
AbstractFosamine ammonium (Krenite®) is a foliar herbicide that primarily targets woody plant species; however, formal evaluations of its efficacy and potential for non-target impacts are scarce in the literature. The few tests of fosamine ammonium that exist focus primarily on its use in open environments, and the value of fosamine ammonium in controlling invasive understory shrubs is unclear. Here, we test the impact of fosamine ammonium on invasive common buckthorn (Rhamnus cathartica L.) and co-occurring herbaceous plants across six forest sites in Minnesota, USA. Rhamnus cathartica treated with fosamine ammonium had a 95% mortality rate, indicating high efficacy of fosamine ammonium for use against R. cathartica. Non-target impacts varied between forbs and graminoids such that forb cover was reduced by up to 85%, depending on site, whereas graminoid cover was sparse and impacts of fosamine ammonium on graminoids were unclear. These results indicate that while fosamine ammonium can provide effective control of R. cathartica and other understory shrubs, there is potential for significant non-target impacts following its use. We therefore suggest that land managers carefully consider the timing, rate, and application method of fosamine ammonium to achieve desired target and non-target impacts.
APA, Harvard, Vancouver, ISO, and other styles
47

Nahdi, Maizer Said, and Darsikin Darsikin. "Distribusi dan Kemelimpahan Spesies Tumbuhan Bawah pada Naungan Pinus mercusii,Acacia auriculiformis danEucalyptus alba di Hutan Gama Giri Mandiri, Yogyakarta." Jurnal Natur Indonesia 16, no. 1 (July 27, 2015): 33. http://dx.doi.org/10.31258/jnat.16.1.33-41.

Full text
Abstract:
The purpose of this research was to study distribution and abundance of (shrubs, herbs, and rumput) under the three stands,i.e. Pinus mercusii, Acacia auriculiformis and Eucalyptus alba and environmental factors influencing them in Gama Girimandiri Forest. Data were collected in April-May 2011, using square plots. Plots were located in three locations by followinga stratified random sampling method. We administered 10 repetitions, and plot size 5x5 m for shrubs and herbs, and 1X1 m forgrass. The species found in each stand were identified and calculated for their density, frequency, domination, importantvalue, diversity index, and those parameters’ correlation with the measured environmental factors. The study shows that 59species of herbs and shrubs, and 12 species of grass. In the three stands, it could be shown various domination of grass,meanwhile there is no dominant species at the level of herbs and shrubs. The highest density, measured by diversity index,was observed at the stand of Pinus (3,13), followed by Acacia (3,12) and Eucalyptus (2,8). The distribution and density ofMemecylon sp and Oplismenus burmanni were observed at their highest value under the stand of Pinus, Lantana camaraLinn (37.2). At the same fashion, Paspalum conjugatum (58.3) does under the stand of Acacia, and Desmodium triflorum(64,2) and Ischaemum magnum (122) under Eucalyptus. Lantana camara could always be found under the three stands, ithad high important value, categorized as strategy species and invasive. Light density and pH significantly influenced thediversity index of shrubs and herbs. In addition, only soil temperature gave an effect to grass.
APA, Harvard, Vancouver, ISO, and other styles
48

Boyd, Jennifer Nagel, Cheng-Yuan Xu, and Kevin L. Griffin. "Cost-effectiveness of leaf energy and resource investment of invasive Berberis thunbergii and co-occurring native shrubs." Canadian Journal of Forest Research 39, no. 11 (November 2009): 2109–18. http://dx.doi.org/10.1139/x09-128.

Full text
Abstract:
Photosynthetic energy gain and biomass energy and resource investment represent trade-offs between potential enhancements and limitations to plant productivity, respectively. We compared these characteristics in the exotic invasive Berberis thunbergii DC. with that of co-occurring natives Kalmia latifolia L. and Vaccinium corymbosum L. in a northeastern United States forest. We hypothesized that invasion by B. thunbergii could be facilitated by a lower leaf construction cost (CC) and reduced leaf nitrogen content (N) relative to photosynthetic rate (A) and maximum photosynthetic capacity (Amax), which would afford it greater energy-use efficiency (EUE) and nitrogen-use efficiency (NUE), and maximums of these variables (EUEmax and NUEmax), compared with native shrubs. Although B. thunbergii and K. latifolia exhibited similar peak-season A and Amax, EUE, EUEmax, and NUEmax were greater in B. thunbergii, which exhibited lower leaf CC and density. In contrast, EUE, EUEmax, NUE, and NUEmax did not differ between B. thunbergii and V. corymbosum given their similar A, Amax, and area-based leaf CC and leaf N. Considered with leaf phenology, our results suggest two distinct physiological mechanisms could influence B. thunbergii invasion. Specifically, deciduous B. thunbergii exhibited greater cost-effectiveness than evergreen K. latifolia, while a longer payback time for photosynthetic energy gain could offset instantaneous similarities in cost-effectiveness of earlier leafing B. thunbergii and deciduous V. corymbosum.
APA, Harvard, Vancouver, ISO, and other styles
49

Mason, NWH, PL Mudge, D. Palmer, M. McLeod, A.-G. Ausseil, and J. Dymond. "Catchment-scale contribution of invasive nitrogen fixing shrubs to nitrate leaching: a scoping study." Journal of the Royal Society of New Zealand 46, no. 2 (April 2, 2016): 85–102. http://dx.doi.org/10.1080/03036758.2015.1127261.

Full text
APA, Harvard, Vancouver, ISO, and other styles
50

Sitepu, Bina Swasta. "Keragaman dan Pengendalian Tumbuhan Invasif di KHDTK Samboja, Kalimantan Timur (Diversity and Management of Invasive Plants in Samboja Research Forest, Kalimantan Timur)." Jurnal Sylva Lestari 8, no. 3 (September 28, 2020): 351. http://dx.doi.org/10.23960/jsl38351-365.

Full text
Abstract:
Historically, and based on the latest conditions, Samboja Research Forest has a fairly high vulnerability to the presence of invasive species that can interfere with ecosystem stability and forest succession. However, data collection and risk assessment of invasive species have not been conducted in the forest area. The study was carried out to support the management of Samboja Research Forest, particularly in controlling invasive species. The study was conducted with exploration techniques in open areas, secondary forests, and primary forests. The density and frequency data of invasive plants were obtained using random plots in secondary and primary forest areas. The results showed the presence of 52 invasive plant species in the Samboja Research Forest area with dominance by shrubs and herbs. Based on plants distribution and density, four crucial invasive plant species in Samboja Research Forest were identified, namely: Acacia mangium, Spathodea campanulata, Miconia crenata, and Piper aduncum. The management of invasive species was carried out in two stages, short term, through manual weeding, and in the long term, with the prevention, eradication, and periodic risk assessment.Keywords: invasive alien species, Kalimantan, eradication, Spathodea campanulata
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the bibliographies on the topic 'Invasive shrubs' for other source types:
Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography