scholarly journals A multiregional assessment of transnational pathways of introduction

2020 ◽  
Author(s):  
Chris M. McGrannachan ◽  
Shyama Pagad ◽  
Melodie A. McGeoch
Keyword(s):  
Invasive Species ◽  
Biological Invasions ◽  
Management Strategies ◽  
Information Gathering ◽  
Introduction Pathways ◽  
The Past ◽  
Pathway Data ◽  
Hierarchical Levels ◽  
Global Indicators ◽  
Specialist Group

AbstractInformation on the pathways by which alien taxa are introduced to new regions is vital for prioritising policy and management responses to invasions. However, available datasets are often compiled using disparate methods, making comparison and collation of pathway data difficult. Using a standardised framework for recording and categorising pathway data can help to rectify this problem and provide the information necessary to develop indicators for reporting on alien introductions. We combine the Convention on Biological Diversity’s Pathways Categorisation Scheme (CPC) with data compiled by the Invasive Species Specialist Group (ISSG) to report on multiregional trends on alien introduction pathways over the past 200+ years. We found a significant increase in the documented number of multiregional alien introduction events across all pathways of the CPC’s three hierarchical levels. The ‘escape’ pathway is the most common documented pathway used by alien taxa. Transport stowaways via shipping-related vectors are a rapidly increasing contribution to alien introductions. Most alien introduction events were of unknown pathway origin, highlighting the challenge of information gaps in pathway data and reiterating the need for standardised information-gathering practices. Combining the CPC framework with alien introduction pathways data will standardise pathway information and facilitate the development of global indicators of trends in alien introductions and the pathways they use. These indicators have the potential to inform policy and management strategies for preventing future biological invasions and can be downscaled to national and regional levels that are applicable across taxa and ecosystems.

scholarly journals A multiregional assessment of transnational pathways of introduction

NeoBiota ◽  
2021 ◽  
Vol 64 ◽  
pp. 43-67
Author(s):  
Chris M. McGrannachan ◽  
Shyama Pagad ◽  
Melodie A. McGeoch
Keyword(s):  
Invasive Species ◽  
Biological Invasions ◽  
Management Strategies ◽  
Information Gathering ◽  
Introduction Pathways ◽  
The Past ◽  
Pathway Data ◽  
Hierarchical Levels ◽  
Global Indicators ◽  
Specialist Group

Information on the pathways by which alien taxa are introduced to new regions is vital for prioritising policy and management responses to invasions. However, available datasets are often compiled using disparate methods, making comparison and collation of pathway data difficult. Using a standardised framework for recording and categorising pathway data can help to rectify this problem and provide the information necessary to develop indicators for reporting on alien introductions. We combine the Convention on Biological Diversity’s Pathways Categorisation Scheme (CPC) with data compiled by the Invasive Species Specialist Group (ISSG) to report on multiregional trends on alien introduction pathways over the past 200+ years. We found a significant increase in the documented number of multiregional alien introduction events across all pathways of the CPC’s three hierarchical levels. The ‘escape’ pathway is the most common documented pathway used by alien taxa. Transport stowaways via shipping-related pathways are a rapidly increasing contribution to alien introductions. Most alien introduction events were of unknown pathway origin, highlighting the challenge of information gaps in pathway data and reiterating the need for standardised information-gathering practices. Combining the CPC framework with alien introduction pathways data will standardise pathway information and facilitate the development of global indicators of trends in alien introductions and the pathways they use. These indicators have the potential to inform policy and management strategies for preventing future biological invasions and can be downscaled to national and regional levels that are applicable across taxa and ecosystems.

Genetic structure of introduced American mink (Neovison vison) in Patagonia: colonisation insights and implications for control and management strategies

2018 ◽  
Vol 45 (4) ◽  
pp. 344 ◽  
Author(s):  
Mónica Mora ◽  
Gonzalo Medina-Vogel ◽  
Maximiliano A. Sepúlveda ◽  
Daly Noll ◽  
Rocío Álvarez-Varas ◽  
...  
Keyword(s):  
Invasive Species ◽  
Biological Invasions ◽  
Control Strategies ◽  
American Mink ◽  
Management Strategies ◽  
Neovison Vison ◽  
Southern Chile ◽  
Effective Population ◽  
Multiple Introductions ◽  
Mtdna Diversity

Context Biological invasions have caused dramatic changes in native biodiversity and ecosystem function. Studies of genetic variation and evolutionary changes are useful for understanding population dynamics during biological invasions, and shed light on management, prevention and restoration strategies. Aims This study aimed to investigate the structure and genetic variability of American mink (Neovison vison), an invasive species in southern South America, introduced for fur farming in the 1930s. Methods Samples from 153 mink were obtained from 12 locations in southern Chile to sequence the mitochondrial DNA (mtDNA) control region and to genotype 11 polymorphic microsatellite loci. Key results The highest mtDNA diversity was detected in Puerto Cisnes, suggesting multiple introductions and/or the most probable area where mink was first introduced. The latter is also supported by microsatellite data, because a high percentage of individuals from different locations were assigned to this location. All other locations showed low or no mtDNA diversity, possibly due to founder effect. The results also indicate marked population structure, with three genetic clusters coincident with the main historical introduction points, with low dispersal among them. Conclusions The results suggest that control strategies for American mink in southern Chile should be concentrated on these three genetically differentiated management units, and particularly on source populations and locations with low effective population size and restricted connectivity. Implications Genetic approaches have been used for the management of numerous alien species worldwide. Recommendations delivered here for American mink control could also be implemented in other regions and for other invasive species with similar genetic diversity distribution and connectivity.

scholarly journals Trauma-Induced Coagulopathy: Overview of an Emerging Medical Problem from Pathophysiology to Outcomes

Medicines ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 16
Author(s):  
Gabriele Savioli ◽  
Iride Francesca Ceresa ◽  
Luca Caneva ◽  
Sebastiano Gerosa ◽  
Giovanni Ricevuti
Keyword(s):  
Major Trauma ◽  
Management Strategies ◽  
Medical Problem ◽  
Current Evidence ◽  
Potential Drug ◽  
The Past ◽  
Trauma Induced Coagulopathy ◽  
Threatening Condition ◽  
Life Threatening ◽  
Trauma Mortality

Coagulopathy induced by major trauma is common, affecting approximately one-third of patients after trauma. It develops independently of iatrogenic, hypothermic, and dilutive causes (such as iatrogenic cause in case of fluid administration), which instead have a pejorative aspect on coagulopathy. Notwithstanding the continuous research conducted over the past decade on Trauma-Induced Coagulopathy (TIC), it remains a life-threatening condition with a significant impact on trauma mortality. We reviewed the current evidence regarding TIC diagnosis and pathophysiological mechanisms and summarized the different iterations of optimal TIC management strategies among which product resuscitation, potential drug administrations, and hemostatis-focused approaches. We have identified areas of ongoing investigation and controversy in TIC management.

scholarly journals Didymo and Its Polysaccharide Stalks: Beneficial to the Environment or Not?

2021 ◽  
Vol 2 (1) ◽  
pp. 69-79
Author(s):  
Hurmat Ejaz ◽  
Esther Somanader ◽  
Uday Dave ◽  
Hermann Ehrlich ◽  
M. Azizur Rahman
Keyword(s):  
Invasive Species ◽  
Structural Component ◽  
Negative Effects ◽  
Adhesive Properties ◽  
The Past ◽  
Positive Side ◽  
Potential Benefits ◽  
Negative Impacts ◽  
Bodies Of Water ◽  
Agricultural Setting

Didymosphenia geminata diatoms, or Didymo, was first found to be an invasive species that could have negative impacts on the environment due to the aggressive growth of its polysaccharide-based stalks. The stalks’ adhesive properties have prompted park officials to alert the general public to limit further spread and contamination of this algae to other bodies of water. Although the negative effects of Didymo have been studied in the past, recent studies have demonstrated a potential positive side to this alga. One of the potential benefits includes the structural component of the polysaccharide stalks. The origin of the polysaccharides within stalks remains unknown; however, they can be useful in a waste management and agricultural setting. The primary purpose of this study was to describe both the harmful and beneficial nature of Didymo. Important outcomes include findings related to its application in various fields such as medicine and technology. These polysaccharides can be isolated and studied closely to produce efficient solar power cells and batteries. Though they may be harmful while uncontained in nature, they appear to be very useful in the technological and medical advancement of our society.

Understanding the decay of stone-built cultural heritage

2008 ◽  
Vol 32 (4) ◽  
pp. 439-461 ◽  
Author(s):  
B.J. Smith ◽  
M. Gomez-Heras ◽  
S. McCabe
Keyword(s):  
Climate Change ◽  
Natural Environment ◽  
Management Strategies ◽  
Building Stone ◽  
Stone Decay ◽  
Building Stones ◽  
The Public ◽  
The Past ◽  
Built Heritage ◽  
Common Misconceptions

The problem of the decay and conservation of stone-built heritage is a complex one, requiring input across many disciplines to identify appropriate remedial steps and management strategies. Over the past few decades, earth scientists have brought a unique perspective to this challenging area, drawing on traditions and knowledge obtained from research into landscape development and the natural environment. This paper reviews the crucial themes that have arisen particularly, although not exclusively, from the work of physical geographers — themes that have sought to correct common misconceptions held by the public, as well as those directly engaged in construction and conservation, regarding the nature, causes and controls of building stone decay. It also looks to the future, suggesting how the behaviour of building stones (and hence the work of stone decay scientists) might alter in response to the looming challenge of climate change.

scholarly journals How Effective Are Existing Phosphorus Management Strategies in Mitigating Surface Water Quality Problems in the U.S.?

2021 ◽  
Vol 13 (12) ◽  
pp. 6565
Author(s):  
Shama E. Haque
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Management Strategies ◽  
Surface Water Quality ◽  
Land Application ◽  
Water Soluble ◽  
Phosphorus Recovery ◽  
Water Bodies ◽  
The Past ◽  
The U.S

Phosphorus is an essential component of modern agriculture. Long-term land application of phosphorous-enriched fertilizers and animal manure leads to phosphorus accumulation in soil that may become susceptible to mobilization via erosion, surface runoff and subsurface leaching. Globally, highly water-soluble phosphorus fertilizers used in agriculture have contributed to eutrophication and hypoxia in surface waters. This paper provides an overview of the literature relevant to the advances in phosphorous management strategies and surface water quality problems in the U.S. Over the past several decades, significant advances have been made to control phosphorus discharge into surface water bodies of the U.S. However, the current use of phosphorus remains inefficient at various stages of its life cycle, and phosphorus continues to remain a widespread problem in many water bodies, including the Gulf of Mexico and Lake Erie. In particular, the Midwestern Corn Belt region of the U.S. is a hotspot of phosphorous fertilization that has resulted in a net positive soil phosphorous balance. The runoff of phosphorous has resulted in dense blooms of toxic, odor-causing phytoplankton that deteriorate water quality. In the past, considerable attention was focused on improving the water quality of freshwater bodies and estuaries by reducing inputs of phosphorus alone. However, new research suggests that strategies controlling the two main nutrients, phosphorus and nitrogen, are more effective in the management of eutrophication. There is no specific solution to solving phosphorus pollution of water resources; however, sustainable management of phosphorus requires an integrated approach combining at least a reduction in consumption levels, source management, more specific regime-based nutrient criteria, routine soil fertility evaluation and recommendations, transport management, as well as the development of extensive phosphorus recovery and recycling programs.

Modeling Habitat Suitability and Management Options for Maintaining Round Whitefish (Prosopium cylindraceum) in Adirondack Ponds

2021 ◽  
Author(s):  
Amy Kathleen Conley ◽  
Matthew D. Schlesinger ◽  
James G. Daley ◽  
Lisa K. Holst ◽  
Timothy G. Howard
Keyword(s):  
Species Distribution Model ◽  
Management Strategies ◽  
Distribution Model ◽  
Nonnative Species ◽  
Simulated Population ◽  
Management Options ◽  
The Past ◽  
Almost All ◽  
Reintroduction Success ◽  
Maximum Air Temperature

Habitat loss, acid precipitation, and nonnative species have drastically reduced the number of Adirondack waterbodies occupied by round whitefish (Prosopium cylindraceum). The goal of this study was to 1) increase the probability of reintroduction success by modeling the suitability of ponds for reintroduction and 2) better understand the effects of different rates of pond reclamation. We created a species distribution model that identified 70 waterbodies that were physically similar to occupied ponds. The most influential variables for describing round whitefish habitat included trophic, temperature, and alkalinity classes; waterbody maximum depth; maximum air temperature; and surrounding soil texture and impervious surface. Next, we simulated population dynamics under a variety of treatment scenarios and compared the probability of complete extirpation using a modified Markov model. Under almost all management strategies, and under pressure from nonnative competitors like that observed in the past 30 years, the number of occupied ponds will decline over the next 100 years. However, restoring one pond every 3 years would result in a 99% chance of round whitefish persistence after 100 years.

The Macroform in Post-Tonalmusic. Listening and Analysis

2003 ◽  
Vol 7 (2) ◽  
pp. 219-240 ◽  
Author(s):  
Mario Baroni
Keyword(s):  
Twentieth Century ◽  
Classical Music ◽  
Extreme Points ◽  
Musical Time ◽  
The Third ◽  
The Past ◽  
Hierarchical Levels ◽  
Twentieth Century Music ◽  
Recorded Performance ◽  
A Performance

Form in classical music is fundamentally a question of organising musical time in order to facilitate a listening corresponding to author's expectations. In the past this was obtained by coordinating different parameters towards a single goal. In twentieth century music, the more detached relationship between the composer and the listener meant that less importance was given to the idea of “correct” listening and to the coordination of parameters. This article is devoted to one of the extreme points in this process: A quartet by Bruno Maderna composed in 1956 under the influence of the ideologies of Darmstadt. The quartet was examined by three different groups of analysts. The first group examined the score of the quartet, while the third group only had a recorded performance at its disposal; the second group analyzed both the score and the performance. The three groups had to describe the form of the piece in terms of three hierarchical levels: Its microform {i.e. the organisation of minimal units not divisible into smaller parts); its macroform (i.e. its division into the minimum possible number of parts); the medium form {i.e. a collection of minimal units that could also be interpreted as an acceptable division of the parts at a macroformal level). Two basic criteria were used: Segmentation (local parametric discontinuity between two adjacent parts) and similarity (coherence between the parameters within each part). The results of the three analyses were somewhat diverse, thus demonstrating the tendency to relax the sense of form in such a quartet, as well as the presence of different procedures used when listening to a performance and analysing a score.

scholarly journals The IUCN-SSC Cave Invertebrate Specialist Group

2018 ◽  
Vol 1 ◽  
Author(s):  
Louis Deharveng ◽  
Tony Whitten ◽  
Judson Wynne ◽  
Ana Komericki ◽  
Sonia Khela
Keyword(s):  
Social Impact ◽  
Narrow Range ◽  
Iucn Red List ◽  
Red List ◽  
Business Sector ◽  
Conservation Priority ◽  
The Past ◽  
Species Survival ◽  
Management Plans ◽  
Specialist Group

The Cave Invertebrate Specialist Group, an IUCN Species Survival Commission, is a group of 80 taxonomists, biospeleologists, ecologists, and conservation biologists. Since 2014, our objectives have been to: (1) conserve subterranean habitats, and address one of the largest lacunas in conservation biology – the protection of sensitive cave and subterranean invertebrate populations; (2) conduct IUCN Red List evaluations for imperiled and/or narrow range endemic species; (3) encourage comprehensive baseline biodiversity surveys, in particular to determine the proportion of unknown biodiversity yet to be discovered; and, (4) provide collaborative opportunities with the business sector for conducting Environmental and Social Impact Assessments, Biodiversity Action Plans, and site and species management plans. We will our accomplishments over the past four years including growth of membership, the number of Red List evaluations conducted and the total number of species recognized as a conservation priority.

scholarly journals A Journey through and beyond the COVID-19 Pandemic in Indian Setup-Lessons Learnt So Far

2021 ◽  
Author(s):  
Divyesh Kumar
Keyword(s):  
Mortality Rate ◽  
Management Strategies ◽  
Health Sector ◽  
Virus Spread ◽  
Health Security ◽  
The Past ◽  
Lessons Learnt ◽  
The People ◽  
Second Wave ◽  
Day By Day

World over life was going at its normal pace when an outbreak occurred in Hubei province of China in the later part of the year 2019. This outbreak was soon found to be caused by a virus named coronavirus (COVID-19). Rapidly the virus spread globally leading to a pandemic. The mortality rate was increasing day by day and helplessly everyone was wondering what actually could be done to prevent the spread. Lessons from the past epidemic made it possible to think that maintaining social distancing and adequate hygiene might help to combat the ailment. In India, majorly affected were the people from poor strata and the businessmen who were earning their daily bread by selling things of daily need. The health sector too witnessed an alarming ratio of patients suffering from COVID-19. The second wave, which soon followd the first wave, caused much more havoc. Overall, the COVID-19 pandemic, exposed and challanged the health security system of every country. As the danger of pandemic still prevails, steps to curtail the spread of disease and future management strategies should be formulated from the lessons learnt through the COVID-19 phase.

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