scholarly journals Analysis Of Invasive Flora In Cemetery Territories Of The City Of Daugavpils

2015 ◽  
Vol 2 ◽  
pp. 344
Author(s):  
Santa Rutkovska ◽  
Irēna Pučka ◽  
Ingūna Novicka
Keyword(s):  
Alien Species ◽  
Invasive Plant ◽  
Invasive Alien Species ◽  
Ornamental Plants ◽  
Field Studies ◽  
Invasive Flora ◽  
Scale Field ◽  
Structure Of Population ◽  
Age Structure Of Population ◽  
The City

Alien species are reaching different areas, including also cemeteries. Inventory of invasive flora of cemeteries of the city of Daugavpils actually is the first such type of work to such level of detail on the Latvian scale. Field studies were conducted in 10 cemeteries of the city of Daugavpils. The obtained results are indicative of a comparatively high proportion of invasive plant species in the cemeteries. 49 invasive alien species were found. In the cemetery areas these are spreading mainly from greeneries, but there are also such taxa, which have accidentally reached the cemeteries. The most frequent plant in the Daugavpils cemeteries is Spiraea chamaedryfolia. Taking into account the trends of migration, sex-age structure of population, climate change, availability of exotic and new ornamental plants, it is most likely that the number of invasive species will grow in the future.

scholarly journals Host plant preference of Metcalfa pruinosa (Say, 1830) (Hemiptera: Flatidae) in the north of Hungary

2015 ◽  
pp. 84-95
Author(s):  
András Bozsik
Keyword(s):  
Population Density ◽  
Alien Species ◽  
Invasive Alien Species ◽  
Ornamental Plants ◽  
Economic Damage ◽  
Fruit Crops ◽  
Railway Line ◽  
The North ◽  
Significant Damage ◽  
Long Time

Citrus flatid planthopper, a native insect to North America had for a long time a scarce economic importance there. However, being polyphagous made little damage on citrus trees and some ornamentals. In 1979 it was introduced to Italy where it established and spread quickly. It is now an invasive alien species continually spreading in South and Central Europe causing considerable damage in fruit crops and various ornamentals. Present study shows the results of a series of observations carried out from 2011 to 2015 at a number of habitats in north of Hungary. The pest could be found at each habitat but the hedge, the tree row, the gardens and the orchard/vineyard were the most infested. Frequency and population density of Metcalfa pruinosa were considerable on Asteraceae, Cannabaceae, Fabaceae, Juglandaceae, Lamiaceae, Rosaceae and Sapindaceae. Typical vegetation could be functionally classified as ornamental plants, trees/shrubs, fruit plants, weeds and feral plants. Feral plants – some of them also invasive alien species – were found at each habitat. Plant species native to America were among them the most populated. As the hedgerows were neglected, and most gardens, orchards and vineyards abandoned, these are excellent conditions for the quick and long-lasting establishment of the pest as well as they may be reservoirs to infest cultivated fruit crops and ornamentals. The hedgerow was situated along a railway line. The length of similar hedges can be merely in Pest county several hundred km, which means M. pruinosa has plenty of opportunity for spreading along the railway and infest agricultural and ornamental cultures. On the surveyed alfalfa and maize fields, accidentally very few nymphs and adults were observed. Although, the population density of M. pruinosa was considerable on many hostplants, economic damage or yield losses could not be detected. Economic or significant damage was observed only on roses, raspberries and stinging nettle. This later is cultivated in Germany and Finland. The applied horticultural oil was efficient.

scholarly journals Aging of the population of the Republic of Serbia and Belgrade through the prism of the relation of the age structure of the population and the age structure of household members

2010 ◽  
pp. 221-227
Author(s):  
Radmila Vicentijevic
Keyword(s):  
Young People ◽  
Old Age ◽  
Age Structure ◽  
Age Groups ◽  
Structure Of Population ◽  
Age Structure Of Population ◽  
Household Members ◽  
The Republic ◽  
Average Size ◽  
The City

The most important age structure represents an age structure of population. The results of census which was held on territory of the Republic of Serbia show that the Republic of Serbia is considered to be among the countries with the oldest population. In the last fifty year's time there was registered a constant decrease in number of young people, and constant increase in number of old people. During the period of the 80s, a number of young people from 0-14 years old was twice larger than the number of people older than 65, on the republic and the city of Belgrade's level, in the last census held in 2002 for the first time there was noticed a higher amount of people older than 65 related to population in an age from 0-14. An average old age of people in the Republic has grown from 35.8 to 40.3, and in Belgrade, which was always considered as a city of youth, it is noticed an increase in average old age from 34.9 to 40.4 years of age. Index of aging increased from 0.51 in the Republic of Serbia, 0.41 in Belgrade, to 1.01 or 1.07. In the Republic of Serbia and the city of Belgrade, for more than 50 years, the average size of household became smaller for more than one member, a number of single man households has increased for 5.5%, and participation of some old age groups in a structure of household members in a specific way shows a difficult demographic situation in Serbia and the city of Belgrade. Almost 83% of households in Central Serbia don't have even one pre-school child, and among households which have children at the age of 7, one child households form the majority. In the same period the number of households with members older than 65 has increased, so households like this in 2002 formed about 39%. Out of 435491 households in Serbia, every fifth household is named as OLD AGE HOUSEHOLD and SINGLE MAN HOUSEHOLD. .

scholarly journals Specificity of population trends in Vojvodina - the 2011 census

2014 ◽  
pp. 471-479
Author(s):  
Snezana Stojsin
Keyword(s):  
Population Decline ◽  
Steady Increase ◽  
World War ◽  
Population Movements ◽  
The North ◽  
Structure Of Population ◽  
Age Structure Of Population ◽  
Novi Sad ◽  
The City ◽  
Mechanical Movement

According to the 2011 Census, Vojvodina has the population of 1,931,809 which is by 100,183 less than in 2002. Vojvodina has fewer inhabitants today than in 1971. This decrease in number of inhabitants, according to the latest census, occurred in all municipalities except in the City of Novi Sad, where the population annually increased by 4,703. The main objective of this paper was to analyze the movement of population between two censuses, focusing on the specifics of population movements in certain areas of Vojvodina. First of all, the area of the North Banat should be pointed out because there the population has been steadily declining since 1961. On the other hand, the South Backa area records a steady increase in population in the period from the World War Two to the present, mainly due to the mechanical movement or immigration to the center of this area - the City of Novi Sad. In addition to the population decline, the population of Vojvodina is characterized by higher average age. The last census showed that the population of all municipalities was, on average, older than 40, except in the municipality of Zabalj (39.7) and the City of Novi Sad (40.0). Analysis of the data has shown that the trend of the population decline in Vojvodina, caused by very high mortality rates and low birth rates, continues and that the age structure of population is becoming less favorable.

scholarly journals Composição arbórea do IFPB - Campus Cajazeiras

2019 ◽  
Vol 1 (44) ◽  
pp. 176
Author(s):  
Airton Danilo De Sousa Oliveira ◽  
Dafi Irenice De Abreu ◽  
George Da Cruz Silva ◽  
Sarahbelle Leitte Cartaxo Meneses
Keyword(s):  
Global Warming ◽  
Alien Species ◽  
Exotic Species ◽  
Native Species ◽  
Invasive Alien Species ◽  
Small Minority ◽  
University Campuses ◽  
Federal Institute ◽  
Education Science ◽  
The City

Due to the growth of Cajazeiras in the last years, the city now has many university campuses, among them the Federal Institute of Education, Science and Technology of Paraíba (IFPB). Because of this growth in which the buildings take up the space of the vegetation, in conjunction with the necessity of the afforestation to mitigate the effects of the impacts on the environment, mainly the global warming, and to improve the living conditions in these places, this research underlines the identification and analysis of Cajazeiras campus’ afforestation. By the end of the research, it was possible to it was possible to determine the amount of trees in this campus, which adds up the number to 335 arboreal individuals. It was also pointed out that there is a predominance of exotic species, corresponding to a total of 78.14% of all arboreal individuals on campus. Since native species are a small minority, tree biodiversity is compromised, as exotic species predominate and there is a considerable percentage of invasive alien species.

scholarly journals Invasive Plant Atlas of New England: The Role of Citizens in the Science of Invasive Alien Species Detection

BioScience ◽  
2011 ◽  
Vol 61 (10) ◽  
pp. 763-770 ◽  
Author(s):  
Sarah T. Bois ◽  
John A. Silander ◽  
Leslie J. Mehrhoff
Keyword(s):  
New England ◽  
Alien Species ◽  
Invasive Plant ◽  
Invasive Alien Species ◽  
Species Detection

scholarly journals Alien and invasive plant species in plant communities of floodplain forests of the Małopolska Upland / Obce oraz inwazyjne gatunki roślin w zbiorowiskach lasów łęgowych Wyżyny Małopolskiej

2015 ◽  
Vol 69 (2) ◽  
Author(s):  
Jacek Koba
Keyword(s):  
Alien Species ◽  
Plant Species ◽  
Invasive Plant ◽  
Field Studies ◽  
Floodplain Forests ◽  
Alien Plant ◽  
Alien And Invasive Plants ◽  
Impatiens Parviflora ◽  
The Stability ◽  
The Individual

AbstractDuring the field studies on the floodplain forests of the Małopolska Upland carried out in 2009-2013, the author tried to determine which species of alien and invasive plants could be a threat to the stability of these vegetation communities. Efforts were also made to answer the question, which floodplain forests are particularly vulnerable to the penetration of alien species and in which layers of the forest plant community are the best conditions for the development of the individual alien plant species. During the research, a total number of 344 reléves were made, of which 90 recorded the presence of alien species. The most common were: Impatiens parviflora, Acer negundo and Padus serotina. The highest percentage of reléves involving alien species was found in the riverside floodplain forests of Salicetum albo-fragilis and Populetum albae.

scholarly journals ĐẶC ĐIỂM PHÂN BỐ, MỨC ĐỘ TÁC ĐỘNG VÀ CON ĐƯỜNG PHÁT TÁN CỦA LOÀI BÌM BÔI HOA VÀNG (Merremia boisiana) TẠI HUYỆN A LƯỚI TỈNH THỪA THIÊN HUẾ

2020 ◽  
Vol 4 (2) ◽  
pp. 1960-1969
Author(s):  
Nguyễn Hợi ◽  
Trần Minh Đức ◽  
Trần Nam Thắng ◽  
Hồ Đăng Nguyên ◽  
Đinh Diễn
Keyword(s):  
Alien Species ◽  
Invasive Plant ◽  
Invasive Alien Species ◽  
Root Diameter ◽  
The Other ◽  
Main Body ◽  
Invasive Plant Species ◽  
Mature Trees ◽  
Adverse Conditions ◽  
The Difference

ABSTRACT Bim boi hoa vang (Merremia boisiana) becomes more abundant in A Luoi district, Thua Thien Hue province. This study identified the distribution of the species impacts on the habitats, and the dispersal paths. Through transect and standard plot surveys, we identified 12 species, of which 5 invasive alien species and 7 highly invasive plant species. Among these 12 species, Bim boi hoa vang has the highest impact on the habitat. They appears in most of the habitats, except for the pristine and rich forests. Distributing in clusters, they are mainly mature trees with an average root diameter of 4 - 5cm, main body length of about 20 - 30 m. They are creating a double repercussion that benefits themselves and harmful to the other species within the habitat. They significantly reduced the  number of prospective trees. They can also create other adverse conditions such as doubling the fallen branches and leaves; increasing 3 times the difference in light amplitude; increasing the ratio of secondary organisms and decomposing up to 3 - 4 times higher than in uncovered places. This species can be dispersed by wind, water, animals, human activity and self-dispersing, most feasible by the wind.

scholarly journals Ochrona zasobów biosfery przed inwazyjnymi gatunkami roślin

2020 ◽  
Vol 29 (2) ◽  
pp. 141
Author(s):  
Emilia Nawrotek
Keyword(s):  
Ecosystem Services ◽  
Alien Species ◽  
Plant Species ◽  
Native Species ◽  
Invasive Plant ◽  
Invasive Alien Species ◽  
Structure And Function ◽  
Invasive Plant Species ◽  
Legal Model ◽  
And Function

<p>This study addresses the assessment of the legal model of protection against invasive plant species. Invasive alien species are one of the main risks to biodiversity and related ecosystem services. The threat to biodiversity and related ecosystem services posed by invasive alien species takes various forms. Moreover, invasive alien species have a significant impact on native species and on the structure and function of the ecosystem. There is a very low awareness of this phenomenon in Poland and worldwide. Therefore, legal instruments and appropriate knowledge are the basic elements of building a strategy for dealing with invasive alien species.</p>

Invasive species issues in Canada - How can ecology help?

2007 ◽  
Vol 87 (5) ◽  
pp. 989-992 ◽  
Author(s):  
D. R. Clements ◽  
P. M. Catling
Keyword(s):  
Invasive Species ◽  
Alien Species ◽  
Invasive Plants ◽  
Invasive Plant ◽  
Biological Diversity ◽  
Invasive Alien Species ◽  
Alien Invasive Species ◽  
Convention On Biological Diversity ◽  
Ecological Knowledge ◽  
Terrestrial Plants

The field of invasive species biology has been growing rapidly in the past decade, spurred on by the US Executive Order on invasive species in 1999. Despite calls to deal with invasive alien species under the International Convention on Biological Diversity in 1992, Canada has been slow to act. Part of the difficulty in managing alien invasive species effectively lies in the lack of ecological knowledge. The Canadian strategy on invasive alien terrestrial plants developed recently by the Canadian Food Inspection Agency sees research as a critical component of the strategy, including study of the biology and ecology of invasive plants. A symposium on ecology and invasive plant species at the Plant Canada meeting in 2007 in Saskatoon served to explore some emerging research in Canada, particularly focusing on Canada’s prairie region. Papers derived from five of the presentations are presented here and illustrate well the continuing challenge of applying ecological principles to the complex issues surrounding invasive plants. Canadian ecologists have made a significant contribution, but much remains to be done along the lines of the simple studies provided in this symposium. Key words: Invasive alien species, prairie region, biodiversity, ecological research

scholarly journals The domestic, the wild and its interstices: what can a dog do in Tierra del Fuego

2020 ◽  
Vol 17 ◽  
Author(s):  
Luisa Amador Fanaro
Keyword(s):  
Alien Species ◽  
Rural Areas ◽  
Invasive Alien Species ◽  
Field Research ◽  
Tierra Del Fuego ◽  
Companion Dogs ◽  
Sled Dogs ◽  
Wild Dogs ◽  
The City

Abstract This study examines dogs that pull sledges in tourist activities in Ushuaia (capital of Tierra del Fuego province) and their relations with their breeders (the mushers) and with the tourists they both work for. Nevertheless, during my field research I also came across other dogs in other contexts, among them the numerous companion dogs abandoned in the city and the so-called “wild dogs”, who live in rural areas and are thus seen by Fuegians as “harmful animals” and an “invasive alien species” - that is, a problem to be solved. In this paper I consider sled dogs and wild dogs, and the different statuses that dogs can assume in these different contexts in which animals and humans relate, considering that in Tierra del Fuego canine work operates as a domesticity regime.

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