Totally Peripheral Approach for ICD Lead Vegetation Removal in a GUCH patient

2021 ◽  
Author(s):  
Vincenzo Tarzia ◽  
Chiara Tessari ◽  
Lorenzo Bagozzi ◽  
Federico Migliore ◽  
Demetrio Pittarello ◽  
...  
Keyword(s):  
Vegetation Removal

QGG J. HOOVER MACKIN AWARD: CHANNEL MORPHOLOGIC CHANGE ASSOCIATED WITH INVASIVE VEGETATION REMOVAL

2020 ◽  
Author(s):  
Celeste Wieting ◽  
◽  
Sara L. Rathburn ◽  
Jonathan M. Friedman
Keyword(s):  
Morphologic Change ◽  
Vegetation Removal

Impact of vegetation control measures on the bedform of braided gravel-bed river

2021 ◽  
Author(s):  
Runye Zhu ◽  
Ryota Tsubaki
Keyword(s):  
Physical Process ◽  
Vegetation Cover ◽  
Main Channel ◽  
River Morphology ◽  
Morphological Response ◽  
Vegetation Control ◽  
Braided Rivers ◽  
Vegetation Removal ◽  
Maximum Discharge ◽  
Small Channels

<p>Braiding is among the most dynamic landscape on Earth. It provides diverse habitats for freshwater creatures. Unfortunately, the number of braided rivers is reducing affected by human activities in the Anthropic period. The increase of the vegetation cover within the river corridor is one important factor, which is induced by flow regime change, land-use change, or alien vegetation invasion. Vegetation clearance could be a promising measure to mitigate vegetation overexpansion. Several previous research suggested vegetation clearance may induce geomorphological metamorphosis. However, quantitative prediction of the morphological change resulted from the vegetation clearance is still an open question to date. We simulated the river morphological response of vegetated braided river with gravel bed to the vegetation clearance using the Nays2DH model combined with a vegetation module. Except for vegetation removal, the developed conceptual model considered vegetation colonization and the destruction induced by floods. Multiple scenarios have been tested, considering two vegetation types (strong and weak vegetation), two clearance methods (full clearance and partial clearance), and two maximum discharge. The full clearance scenario stood for the removal of above-ground and underground biomass simultaneously, and the partial clearance scenario stood for the removal of above-ground biomass. Braided rivers had developed for both no vegetation and river with weak vegetation cover. The bedform affected by strong vegetation coverage consisted of a main channel and small channels on the floodplain, which was consistent with previous experimental results. The distinctive morphology of developed bed form depended on the dominant factor in the vegetation-geomorphology interaction: vegetation dominant or physical process dominant. River morphology responded differently to the vegetation control measure based on the dominating factor. For the vegetation dominated river, the developed main channel tended to be braiding after the vegetation removal, and the river morphology change was sensitive to the vegetation clearance method. By contrast, river morphology changed insignificantly by vegetation colonization and after vegetation removal if the river physical process was dominant. We also found that the small channels on the floodplain promoted sediment transport from the floodplain to the main channel after the vegetation clearance. Thus, the morphological response to the vegetation clearance method was also affected by the reduction of maximum discharge because the connectivity between floodplain and channel was reduced. To improve vegetation clearance effectiveness, we recommend increasing the connectivity between the floodplain and the main channel, such as excavating small channels on the floodplain.</p>

scholarly journals Impact of Ornamental Vegetation Type and Different Substrate Layers on Pollutant Removal in Constructed Wetland Mesocosms Treating Rural Community Wastewater

Processes ◽  
2019 ◽  
Vol 7 (8) ◽  
pp. 531 ◽  
Author(s):  
Sergio Zamora ◽  
Luis Sandoval ◽  
J. Luis Marín-Muñíz ◽  
Gregorio Fernández-Lambert ◽  
M. Graciela Hernández-Orduña
Keyword(s):  
Rural Communities ◽  
Vegetation Type ◽  
Ornamental Plants ◽  
Soil Layer ◽  
Oxygen Demand ◽  
Pollutant Removal ◽  
Environmental Aspect ◽  
Vegetation Removal ◽  
Ammonium N ◽  
Wetland Mesocosms

Improving water quality is a relevant environmental aspect, and using constructed wetlands (CWs) is a sustainable option for this; both porous material filled cells and plants that collectively remove contaminants must be readily available and inexpensive. This study evaluated CWs and their functionality by comparing two ornamental plants (Spathiphyllum wallisii and Hedychium coronarium) planted in experimental mesocosm units filled with layers of porous river rock, tepezil, and soil, or in mesocosms with layers of porous river rock, and tepezil, without the presence of soil. The findings during the experiments (180 days), showed that the removal of pollutants (chemical oxygen demand (COD), total solids suspended (TSS), nitrogen as ammonium (N-NH4), as nitrate (N-NO3), and phosphate (P-PO4) was 20–50% higher in mesocosms with vegetation that in the absence of this, and those mesocosms with the soil layer between 33–45% favored removal of P-PO4. Differences regarding of vegetation removal were only observed for N-NH4, being 25–45% higher in CWs with H. coronarium, compared with S. wallisii. Both species are suitable for using in CWs, for its functionality as phytoremediation, and aesthetic advantages could generate interest for wastewater treatment in rural communities, parks, schools or in domiciliary levels like floral flower boxes in the backyard. The study also revealed that a soil layer in CWs is necessary to increase the removal of P-PO4, an ion hardly eliminated in water treatment.

scholarly journals Hydrologic response and recovery to prescribed fire and vegetation removal in a small rangeland catchment

Ecohydrology ◽  
2016 ◽  
Vol 9 (8) ◽  
pp. 1604-1619 ◽  
Author(s):  
G. N. Flerchinger ◽  
M. S. Seyfried ◽  
S. P. Hardegree
Keyword(s):  
Prescribed Fire ◽  
Hydrologic Response ◽  
Vegetation Removal ◽  
Response And Recovery

scholarly journals Comanaging fresh produce for nature conservation and food safety

2015 ◽  
Vol 112 (35) ◽  
pp. 11126-11131 ◽  
Author(s):  
Daniel S. Karp ◽  
Sasha Gennet ◽  
Christopher Kilonzo ◽  
Melissa Partyka ◽  
Nicolas Chaumont ◽  
...  
Keyword(s):  
Food Safety ◽  
Fresh Produce ◽  
Foodborne Pathogen ◽  
The United States ◽  
Livestock Grazing ◽  
Central Coast ◽  
E Coli ◽  
Vegetation Removal ◽  
Pathogen Prevalence ◽  
Coast Region

In 2006, a deadly Escherichia coli O157:H7 outbreak in bagged spinach was traced to California’s Central Coast region, where >70% of the salad vegetables sold in the United States are produced. Although no definitive cause for the outbreak could be determined, wildlife was implicated as a disease vector. Growers were subsequently pressured to minimize the intrusion of wildlife onto their farm fields by removing surrounding noncrop vegetation. How vegetation removal actually affects foodborne pathogens remains unknown, however. We combined a fine-scale land use map with three datasets comprising ∼250,000 enterohemorrhagic E. coli (EHEC), generic E. coli, and Salmonella tests in produce, irrigation water, and rodents to quantify whether seminatural vegetation surrounding farmland is associated with foodborne pathogen prevalence in California’s Central Coast region. We found that EHEC in fresh produce increased by more than an order of magnitude from 2007 to 2013, despite extensive vegetation clearing at farm field margins. Furthermore, although EHEC prevalence in produce was highest on farms near areas suitable for livestock grazing, we found no evidence of increased EHEC, generic E. coli, or Salmonella near nongrazed, seminatural areas. Rather, pathogen prevalence increased the most on farms where noncrop vegetation was removed, calling into question reforms that promote vegetation removal to improve food safety. These results suggest a path forward for comanaging fresh produce farms for food safety and environmental quality, as federal food safety reforms spread across ∼4.5 M acres of US farmland.

VALUING THE ENVIRONMENTAL COSTS OF VEGETATION REMOVAL AND ECOSYSTEM DISTURBANCE ASSOCIATED WITH PETROLEUM OPERATIONS, COOPER BASIN, SOUTH AUSTRALIA

2006 ◽  
Vol 46 (1) ◽  
pp. 625
Author(s):  
E.V. Mazourenko
Keyword(s):  
State Government ◽  
Community Involvement ◽  
Management Practices ◽  
Contingent Valuation Method ◽  
Petroleum Industry ◽  
Small Scale ◽  
Environmental Costs ◽  
Regulatory State ◽  
Vegetation Removal ◽  
Cooper Basin

This paper describes the results of a small-scale study that looked at an alternative way of managing the environmental impacts of petroleum developments. The study was based on a contention that an application of the contingent valuation method (CVM) in the context of petroleum developments might assist the petroleum industry in achieving the goals of ecologically sustainable development (ESD), while contributing to the change of the community’s attitude towards the industry. CVM, based on direct community involvement in determining the environmental costs of the native vegetation removal associated with the petroleum developments in the South Australian Cooper Basin, was applied to the selected ‘groups of interest’. The collected data were analysed and discussed in light of the feasibility of a full-scale CVM study, and its potential practical value both for the petroleum companies operating in the Cooper Basin and the regulatory state government authorities. The results of this study showed that the application of CVM in the context of the petroleum industry might yield significant benefits for the industry in terms of ESD. In the long term, it may assist in changing the community’s perception of the petroleum industry. This approach does not intend to contradict, but to complement, the current environmental management practices of the petroleum developers.

scholarly journals Biotic interactions experienced by a new invader: effects of its close relatives at the community scale

Botany ◽  
2012 ◽  
Vol 90 (1) ◽  
pp. 35-42 ◽  
Author(s):  
Steven B. Hill ◽  
Peter M. Kotanen
Keyword(s):  
Shoot Growth ◽  
Biotic Interactions ◽  
Soil Biota ◽  
Community Type ◽  
Combined Effects ◽  
Old Field ◽  
Soil Sterilization ◽  
Vegetation Removal ◽  
Solidago Virgaurea ◽  
Close Relatives

The success of nonindigenous species may be influenced by biotic interactions during the initial stages of invasion. Here, we investigated whether a potential invader, Solidago virgaurea L., would experience more damage by natural enemies in communities dominated by close relatives than those without them; interactions with mutualistic mycorrhizae might partially counteract these effects. We monitored damage experienced by S. virgaurea planted into communities with native congeners and without close relatives. Community type was crossed with a vegetation removal treatment to assess the combined effects of herbivory and competition on survival. We also evaluated growth of S. virgaurea in a greenhouse experiment where seedlings were exposed to soil biota sampled from these communities and compared with sterile controls. Overall, community type did not affect levels of herbivory or plant survival. Removal of surrounding vegetation resulted in reduced damage and increased survival; these effects were largest in grass-dominated communities. Soil sterilization reduced root growth and tended to reduce shoot growth, especially when compared with plants inoculated with biota collected near congeners. Overall, our results suggest that the presence of close relatives is unlikely to make old-field communities more resistant to invasion by S. virgaurea; instead, soil biota might facilitate growth in communities dominated by close relatives.

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