scholarly journals Global patterns of seed germination after ingestion by mammals

2019 ◽  
Author(s):  
Diego A. Torres ◽  
John H. Castaño ◽  
Jaime A. Carranza-Quiceno
Keyword(s):  
Seed Germination ◽  
Plant Communities ◽  
Seedling Recruitment ◽  
Cumulative Effect ◽  
Future Research ◽  
Mammal Species ◽  
Plant Family ◽  
The World ◽  
Germination Success ◽  
Global Patterns

AbstractSeed germination is the first step in seedling recruitment. Understanding what factors determine germination success allows some predictions of the effect of climate change or defaunation on the dynamics of plant communities. Mammals play an important role on seed germination through the ingestion of fruit and seeds. However, the populations of many mammal species have been reduced throughout the world, affecting in many ways the dynamics of plant communities. To understand how the loss of mammal populations might impact the dynamics of plant communities first requires us to collect and synthetize all the available evidence on the effects of mammals on seedling recruitment. Here, we used meta-analytical methods to describe the global patterns of the ingestion of seeds by mammals and their effect on seed germination. Our results showed a positive cumulative effect of mammals on seed germination. However, this effect was not the same for all the mammal orders; it varied depending on the plant family and the bioregion. Additionally, increased seed germination was related to rapid germination. These data highlight the important role that some mammals such as Primates and Elephants have on seed germination, and this poses many questions about the mechanisms behind seed germination patterns that will help to guide future research efforts.

Socio-Cultural Impacts on Drug Trafficking Trends in Europe

2015 ◽  
Vol 23 (4) ◽  
pp. 383-406 ◽  
Author(s):  
Diana S. Dolliver
Keyword(s):  
Time Series ◽  
Drug Trafficking ◽  
Multivariate Time Series ◽  
Criminological Theory ◽  
Future Research ◽  
Cross Sectional ◽  
Crime Type ◽  
Anomie Theory ◽  
The World ◽  
Global Patterns

A myriad of national and international publications have detailed global patterns of drug trafficking for decades, with recent reports identifying Europe as a global consumption “hotspot” for the majority of popular drugs in the world. Yet, despite increasing levels of drug trafficking worldwide, scholars have not routinely examined this crime-type through the lens of a socio-cultural criminological theory. As such, this empirical study employed guidance from Institutional Anomie Theory. Data were collected from fourteen countries in Europe from 1995 to 2009 and analyzed using pooled cross-sectional multivariate time series. Trafficking patterns in cannabis, heroin, cocaine, and amphetamines were operationalized using officially reported drug seizure amounts. The findings from this study emphasize the need for differentiation between drug-types in future research, but also illustrate support for use of the theoretically informed variables.

Determining the factors affecting seed germination in Livistona australis (Arecaceae) for the recovery of fragmented populations

2012 ◽  
Vol 60 (7) ◽  
pp. 575 ◽  
Author(s):  
Nicholas Carlile ◽  
David Priddel ◽  
Tony D. Auld ◽  
David A. Morrison
Keyword(s):  
Seed Germination ◽  
Seedling Recruitment ◽  
Seed Viability ◽  
Factors Affecting ◽  
Light Levels ◽  
In Situ Experiments ◽  
Germination Success ◽  
Buried Seed ◽  
Potential Success

Understanding seed germination and seedling recruitment is important for managing long-lived plant species, particularly palms that are transplanted from the wild and where regeneration is suppressed by seed predators and exotic herbivores. Seed viability, the timing of germination, and the factors influencing germination were investigated for the cabbage tree palm, Livistona australis (R.Br.) Mart. Greenhouse studies were combined with in situ experiments conducted on the Australian mainland and on a nearby mammal-free island. Under greenhouse conditions, >90% of seed germinated within 4 months. In the field, burial rather than surface sowing of seed increased germination success. Seed without mesocarp and in sunlight had increased germination when compared with fruits in shade on the island, whereas neither presence/absence of mesocarp or light levels had any effect on the mainland. Germination success was substantially lower on the mainland, primarily because of high seed predation from the native bush rat, Rattus fuscipes. When caged to exclude vertebrates, 44% of seed were damaged over time by pathogens and invertebrates, with losses greater in sunlight than in shade. Results from the present study indicate that freshly buried seed with the mesocarp removed would have the greatest potential success in promoting the restoration of L. australis at degraded sites.

EXPLORING THE INTERNAL STRENGTHS AND WEAKNESSES OF THE ORGANIZATION

2018 ◽  
Vol 28 (1) ◽  
pp. 73-78
Author(s):  
Venelin Terziev ◽  
Marin Georgiev
Keyword(s):  
20Th Century ◽  
Structural Changes ◽  
Cumulative Effect ◽  
Professional Culture ◽  
Social Revolution ◽  
Modern Times ◽  
The World ◽  
History Of ◽  
Scientific Technical ◽  
The Subject

The subject of this article is the genesis of the professional culture of personnel management. The last decades of the 20th century were marked by various revolutions - scientific, technical, democratic, informational, sexual, etc. Their cumulative effect has been mostly reflected in the professional revolution that shapes the professional society around the world. This social revolution has global consequences. In addition to its extensive parameters, it also has intensive ones related to the deeply-rooted structural changes in the ways of working and thinking, as well as in the forms of its social organization. The professional revolutions in the history of Modern Times stem from this theory.Employees’ awareness and accountability shall be strengthened. The leader must be able to formulate and bring closer to the employees the vision of the organization and its future goal, to which all shall aspire. He should pay attention not to the "letter" but to the "spirit" of this approach.

Regenerative flow pumps, blowers and compressors – A review

2021 ◽  
pp. 095765092110181
Author(s):  
M Sreekanth ◽  
R Sivakumar ◽  
M Sai Santosh Pavan Kumar ◽  
K Karunamurthy ◽  
MB Shyam Kumar ◽  
...  
Keyword(s):  
Quantitative Data ◽  
Research Work ◽  
Future Research ◽  
Performance Parameters ◽  
The World ◽  
Working Principle ◽  
Computational Fluid Dynamics Cfd ◽  
Specific Speed ◽  
Regenerative Flow ◽  
Product Description

This paper presents a detailed and objective review of regenerative flow turbomachines, namely pumps, blowers and compressors. Several aspects of turbomachines like design and operating parameters, working principle, flow behaviour, performance parameters and analytical and Computational Fluid Dynamics (CFD) related details have been reviewed and summarized. Experimental work has been put in perspective and the most useful results for optimized performance have been presented. Consolidated plots of specific speed-specific diameter have been plotted which can be helpful in the early stages of design. Industrial outlook involving details of suppliers from various parts of the world, their product description and applications too are included. Finally, future research work to be carried out to make these machines widespread is suggested. This review is targeted at designer engineers who would need quantitative data to work with.

Promoting Savings for Financial Resilience: Expanding the Psychological Perspective

2021 ◽  
Vol 30 (1) ◽  
pp. 49-54
Author(s):  
Crystal C. Hall
Keyword(s):  
Behavioral Science ◽  
The United States ◽  
Future Research ◽  
Financial Security ◽  
Psychological Perspective ◽  
Psychological Science ◽  
Policy Interventions ◽  
The People ◽  
The World ◽  
Personal Savings

In the United States, the lack of personal savings has been a perennial concern in the world of public policy. Policymakers and other practitioners constantly struggle with how to encourage families to accumulate funds in preparation for inevitable, but often unpredictable, financial emergencies. The field of applied behavioral science has attempted to address this challenge—often with mixed or modest results. I argue that psychological science (personality and social psychology in particular) offers underappreciated insights into the design and implementation of policy interventions to improve the rate of individual savings. In this article, I briefly discuss examples of prior interventions that have attempted to increase saving and then lay out some opportunities that have not been deeply explored. Future research in this area should broaden and deepen the way that psychology is leveraged as a tool to improve the financial security of the people who are the most vulnerable.

scholarly journals Role of Biochar in Improving Sandy Soil Water Retention and Resilience to Drought

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 407
Author(s):  
Ling Li ◽  
Yong-Jiang Zhang ◽  
Abigayl Novak ◽  
Yingchao Yang ◽  
Jinwu Wang
Keyword(s):  
Climate Variability ◽  
Sandy Soil ◽  
Water Retention ◽  
Sandy Soils ◽  
Crop Productivity ◽  
Future Research ◽  
Soil Water Retention ◽  
The World ◽  
Water Holding

In recent years, plants in sandy soils have been impacted by increased climate variability due to weak water holding and temperature buffering capacities of the parent material. The projected impact spreads all over the world, including New England, USA. Many regions of the world may experience an increase in frequency and severity of drought, which can be attributed to an increased variability in precipitation and enhanced water loss due to warming. The overall benefits of biochar in environmental management have been extensively investigated. This review aims to discuss the water holding capacity of biochar from the points of view of fluid mechanics and propose several prioritized future research topics. To understand the impacts of biochar on sandy soils in-depth, sandy soil properties (surface area, pore size, water properties, and characteristics) and how biochar could improve the soil quality as well as plant growth, development, and yield are reviewed. Incorporating biochar into sandy soils could result in a net increase in the surface area, a stronger hydrophobicity at a lower temperature, and an increase in the micropores to maximize gap spaces. The capability of biochar in reducing fertilizer drainage through increasing water retention can improve crop productivity and reduce the nutrient leaching rate in agricultural practices. To advance research in biochar products and address the impacts of increasing climate variability, future research may focus on the role of biochar in enhancing soil water retention, plant water use efficiency, crop resistance to drought, and crop productivity.

Cervical insufficiency: a noteworthy disease with controversies

2020 ◽  
Vol 48 (7) ◽  
pp. 648-655
Author(s):  
Yu Han ◽  
Mengnan Li ◽  
Huijing Ma ◽  
Hailan Yang
Keyword(s):  
Risk Factors ◽  
Diagnosis And Treatment ◽  
Practical Significance ◽  
Future Research ◽  
Cervical Insufficiency ◽  
Factors Associated ◽  
The World ◽  
Potential Risk Factors ◽  
Recurrent Pregnancy Losses ◽  
Recurrent Abortions

AbstractCervical insufficiency (CI) is a mainly disease leading to recurrent abortions and preterm birth which may present in about 1% of obstetric populations. Recurrent pregnancy losses caused by CI incur serious economic burdens on society as well as huge psychological burdens to family members. However, many patients even clinicians in some areas of the world still remain confused about this disease. At the same time, the etiology of CI is still uncertain and it is still a controversial disease in diagnosis and treatment. This article summarizes the potential risk factors associated with CI, which could be worthy of attention and helpful for future research. It also reviews the methods for diagnosis and treatment of CI to better understand this noteworthy disease, as well as presents the related consensus and controversies according to the newly updated guidelines, which has practical significance for conducting more in-depth investigations in the future.

scholarly journals Monitoring invasive mammalian predator populations sharing habitat with the Critically Endangered Puerto Rican parrot Amazona vittata

Oryx ◽  
2005 ◽  
Vol 40 (1) ◽  
pp. 95-102 ◽  
Author(s):  
Richard Engeman ◽  
Desley Whisson ◽  
Jessica Quinn ◽  
Felipe Cano ◽  
Pedro Quiñones ◽  
...  
Keyword(s):  
Puerto Rican ◽  
Habitat Type ◽  
Critically Endangered ◽  
Mammal Species ◽  
Forest Sites ◽  
The World ◽  
Mammalian Predators ◽  
In The Wild ◽  
Amazona Vittata ◽  
Black Rats

Critically Endangered Puerto Rican parrots Amazona vittata are one of the rarest birds in the world. Several exotic mammal species capable of preying on Puerto Rican parrots cohabit the Caribbean National Forest with the only wild population of these parrots. We used tracking plates, monitoring blocks and trapping to index black rats, small Indian mongooses and feral cats in parrot habitat and in public-use areas in the same habitat type. We had high trap success for black rats at all sites (42% of all sites combined), among the highest reported in the world. Rat response to monitoring (nontoxic bait) blocks was universally high, regardless of ground or tree placement. Mongooses were present at all sites, with a greater proportion of plates tracked within the forest than at public-use sites. Cats were present at all forest sites and one of the public-use sites. Presence of the three species did not appear to be linked to human disturbance. Because only 30–40 Puerto Rican parrots survive in the wild, with as few as three pairs nesting in 2002, we concluded that the abundance and pervasiveness of exotic mammalian predators poses a greater threat to the parrots than has been generally acknowledged. This is evidenced by mammalian predation during recent parrot breeding seasons, including six fledglings taken by mongooses and one nest failure from rats during 2000–2003.

LIVE PLANTS AS AN ADDITIONAL BOTANICAL COMPONENTOF THE THEMATIC EXPOSITION IN THE EARTH SCIENCE MUSEUM AT MOSCOW STATE UNIVERSITY

2020 ◽  
Vol 42 (4) ◽  
pp. 478-484
Author(s):  
Kirill Golikov ◽  
Ekaterina LAPTEVA ◽  
A. SOCHIVKO
Keyword(s):  
High Altitude ◽  
Plant Communities ◽  
Earth Science ◽  
Life Forms ◽  
Science Museum ◽  
State University ◽  
Structural Components ◽  
The Earth ◽  
The World ◽  
Moscow State University

The article discusses the use of live plants as the botanical exposition component supplement of the “Natural areas” (hall № 17 “Natural zonality and its components” and № 20 “Desert, subtropical, tropical countries, high-altitude zone”) and “Physico-georaphic regions” (hall № 24 “Continents and parts of the world”) departments in order to visualize information presented in the Earth Science Museum. Demonstration of plants originating from different regions of the world representing different life forms and being structural components of various plant communities allows to visually characterizing thematic aspects of an exposition. That in turn reveal such principles of systematic nature organization as ecobiomorphic and phytocenotic.

A typology of social change agendas in Australian arts organizations and NGOs

2020 ◽  
Vol 12 (1-2) ◽  
pp. 23-40
Author(s):  
Brydie-Leigh Bartleet ◽  
Gillian Howell
Keyword(s):  
Social Change ◽  
Positive Change ◽  
Future Research ◽  
Arts Organizations ◽  
Research Practice ◽  
Governmental Organizations ◽  
Non Governmental Organizations ◽  
The World ◽  
Creative Artists

An increasing number of creative artists, arts organizations and non-governmental organizations (NGOs) are working on socially-engaged initiatives that aim to bring about positive change in communities. Examples of outstanding arts practices can be found throughout the world; however, there are major gaps in our understanding about how this work operates. Drawing on insights from 100 Australian arts organizations and NGOs working in this field, this article aims to address some of these gaps. It outlines a typology of change agendas in these organizations, in order to advance a deeper understanding of this field and inform future research, practice and policy.

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