Bird diversity in Chinese urban parks was more associated with natural factors than anthropogenic factors

2019 ◽  
Vol 43 ◽  
pp. 126358 ◽  
Author(s):  
Jun Liu ◽  
Haotian Bai ◽  
Huiyao Ma ◽  
Gang Feng
2018 ◽  
Vol 22 (1) ◽  
pp. 201-212 ◽  
Author(s):  
Rattanawat Chaiyarat ◽  
Orawee Wutthithai ◽  
Paramita Punwong ◽  
Wut Taksintam

1993 ◽  
Vol 40 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Michel Magny

AbstractChronological correlations established at different time scales among the lake-level fluctuations in the Jura and French Subalpine ranges, glacier movements in the Swiss and Austrian Alps, and the atmospheric 14C record during the last 7 millennia show coincidences between lake-level rises, glacier advances, and high 14C production and vice versa. These correspondences suggest that the short-term 14C variations may be an empirical indicator of Holocene palaeoclimates and argue for possible origins of Holocene climatic oscillations: (1) The varying solar activity refers to secular climatic oscillations and to major climatic deteriorations showing a ca. 2300-yr periodicity. (2) A question is raised about a relationship between the earth's magnetic field and climate. First, the weak-strength periods of the earth's dipole magnetic field (between 3800 and ca. 2500 B.C.) coincide with higher climate variability, and vice versa. Second, the ca. 2300-yr periods revealed by the 14C record and also by the major climatic deteriorations re. corded in Jurassian lakes (ca. 1500 A.D., ca. 800 B.C., and ca. 3500 B.C.) coincide with the ca. 2300-yr periods revealed by the earth's nondipole geomagnetic field. The present warming induced by anthropogenic factors should be intensified during the next few centuries by natural factors of climate evolution.


2017 ◽  
Vol 33 (1) ◽  
pp. 23-30 ◽  
Author(s):  
Badra Attoui ◽  
Samia T. Benrabah ◽  
Habiba Majour ◽  
Nadjet Zair

Abstract The intrinsic vulnerability of groundwater aquifers refers to their sensitivity to all contamination coming from soil surface irrespective of the nature of the polluting. In order to improve the protection of groundwater, there must be a reduction in the infiltration of contaminants towards the reservoir through the impacting factors determination of this phenomenon by means of research. There are collected models that include particular number of factors which allow the determination of a sign of groundwater vulnerability of all superficial pollutions. The goal of the study centers on ascertaining the state of vulnerability and the risk of groundwater pollution of the Collo region with a new proposed method by Kherici. Generally, assessment methods of vulnerability and the danger of groundwater pollution employ parametric systems with numerical quotation, cartographic superposition where the analytical methods are based on equations. In this study, we consider the combination of criteria dependent on natural factors (thickness of the unsaturated zone, geologic facies, degree of auto-purification) and the causes of groundwater vulnerability to man-made pollution (anthropogenic factors).


2019 ◽  
Vol 27 (1) ◽  
pp. 69-75
Author(s):  
A. O. Davydova ◽  
A. A. Ponomarеva ◽  
D. A. Davydov

The protected area of Dzharylhatskyi National Park is only 3% of the total area. This is not enough to preserve dynamic ecosystems that are very vulnerable to natural factors and almost impossible to restore following damage by anthropogenic factors. In the investigated area there are territories with high potential for conservation, which are characterized by the presence of species from the Red Data Book of Ukraine and International Red Lists, plant communities from the Green Data Book of Ukraine and biotopes of global significance. The proposed ten sites should receive protected status, which will bring the protected area up to the necessary minimum to preserve the rare ecosystems of the park from tourism and economic pressure, which have intensified in recent years. For the period of research in 2014–2018, 14 types of sozophytes were identified and confirmed, two of them are the highly localised species endemic to Dzharylhach Island: Molinia euxina Pobed. and Poacynum russanovii (Pobed.) Mavrodiev, A. Laktionov et Y. Alexeev. The syntaxonomic structure of the sozologically valuable coenoses is represented by two basal communities, two subassociations and 8 associations belonging to 9 alliances, 9 orders and 9 classes. Out of them, we provisionally propose the new following groups: ass. Apero maritimi-Chrysopogonetum grylli nom. prov., subass. Apero maritimi-Chrysopogonetum grylli, Stipetum borysthenicae nom. prov., subass. Cladietum marisci, Caricetum extensae nom. prov., BC Molinia euxina [Molinion caeruleae] nom. prov. The proposed sites represent 8 biotopes from Annex I of the Habitat Directive, which imposes obligations for their conservation at the world level. We carried out an analysis of the Ukrainian legislative acts, their correlation with international requirements and the zoning of the NPP “Dzharylhatskyi” in relation to these requirements and recommendations. Thus, the urgent need to expand the boundaries of the protected area of the Dzharylhatskyi National Nature Park by including distinguished protected tracts has been confirmed.


2020 ◽  
pp. 154-178
Author(s):  
Nelli Semenova ◽  
◽  
Ludmila Aristova ◽  

For a decade, the Shanghai port has retained the world’s leading positions not only in terms of economic indicators, but also in terms of equipping the port facilities with the latest achievements of science and technology. Due to its advantageous geographical position since ancient times, it has been an important port for external transport and internal trade of China. Shanghai was historically destined to become the world’s largest transshipment base. But natural factors bear fruit only in the presence of a competent and planned economic policy. The economic success of the port in recent years has been preparing for many decades. Anthropogenic factors, namely the reform and restructuring of the economic system, attracting foreign capital, advanced foreign technologies and management methods, accelerated the development of the port. Technological progress, globalization and political will have made the port the world’s largest industrial port complex. This article is devoted to the analysis of modern achievements and the prospects for the further development of the port of Shanghai.


Author(s):  
Anatoly Filobok ◽  
Anatoly Filobok ◽  
Tatiana Volkova ◽  
Tatiana Volkova ◽  
Vera Minenkova ◽  
...  

This article is devoted to the estimation of recreational potential based on the dynamic processes, natural and anthropogenic factors of the Azov-Black Sea coast of Krasnodar region as an example. Bioclimatic figures are considered as the dynamic processes and natural factors, the degree of the development of exogenous geological processes. Anthropogenic factors are represented by the multi aspect business activities in the coastal zone.


2020 ◽  
Author(s):  
Seckin Fidan ◽  
Tolga Gorum

<p>Landslides are one of the geomorphological hazards that cause significant human, economic and natural losses worldwide and in Turkey as well. In general, landslides triggered by natural factors such as earthquakes, heavy rainfall and snow melting, or human activities cause a large number of casualties. Knowing the precise number of deaths caused by landslides and their spatial and temporal distributions will facilitate a better understanding of the losses and damages, and further to prevent and minimize the damages caused by this type of disasters. In this respect, reliable historical inventories, including past landslide events, are crucial in understanding the future landslide hazards and risks. In this study a new data set of landslides that caused loss of life in the 90-year period from 1929 and 2019 has been compiled, providing new insight into the impact of landslides for Turkey, which is Europe's topmost deadly country.</p><p>The new archive inventory indicates that in the 90-year period a total of 1343 people lost their lives across the region in 389 landslide events in Turkey between 1929 and 2019. The distribution of the fatal landslides is highly varied and concentrated in two distinct zones along the Eastern Black Sea Region and Istanbul mega-city. Our analysis suggests that on a country scale the mapped factors that best explain the observed distribution are topographic relief and gradient, annual precipitation and population density. Temporal trend analysis reveals a significant rise in the number of deadly landslides and hotspots across the studied period was observed. The detailed analysis showed that the control factors of landslides caused by different triggering mechanisms (i.e., natural and anthropogenic) also vary. The landslides of natural trigger origin are concentrated in areas with high topographic relief and slope values, whereas those triggered by anthropogenic factors are concentrated in areas with low topographic relief and slope values. While the slope values were 10.5<sup>°</sup> in the areas where all the fatal landslides occurred, these values were 14.5<sup>°</sup> for natural landslides and 8<sup>°</sup> for anthropogenic landslides. In the areas where landslides triggered by natural factors, the average topographic relief is approximately 600 meters higher than the landslides of anthropogenic origin. Moreover, we observed that fatal landslides have not triggered during the seasonal rainy period, but rather caused by sudden and heavy torrential rainfall during the summer period when the average annual rainfall is low. Fatal landslides triggered by natural factors are concentrated in the Eastern Black Sea section and occur on the Upper Cretaceous and Lower-Middle Eocene volcanics classified as median volcanic rocks with an average thickness of ten meters. The landslides on these lithological units are shallow landslides, which occur mainly a few meters above the regolithic zone, where chemical weathering is severe in this area. Fatal landslides of anthropogenic origin occur in urban and metropolitan centers where human activity is high due to infrastructure and construction works, and they are predominantly corresponding with areas where the topographic relief difference is low.</p>


2020 ◽  
Vol 8 (9) ◽  
pp. 1405 ◽  
Author(s):  
Md. Tanvir Rahman ◽  
Md. Abdus Sobur ◽  
Md. Saiful Islam ◽  
Samina Ievy ◽  
Md. Jannat Hossain ◽  
...  

Most humans are in contact with animals in a way or another. A zoonotic disease is a disease or infection that can be transmitted naturally from vertebrate animals to humans or from humans to vertebrate animals. More than 60% of human pathogens are zoonotic in origin. This includes a wide variety of bacteria, viruses, fungi, protozoa, parasites, and other pathogens. Factors such as climate change, urbanization, animal migration and trade, travel and tourism, vector biology, anthropogenic factors, and natural factors have greatly influenced the emergence, re-emergence, distribution, and patterns of zoonoses. As time goes on, there are more emerging and re-emerging zoonotic diseases. In this review, we reviewed the etiology of major zoonotic diseases, their impact on human health, and control measures for better management. We also highlighted COVID-19, a newly emerging zoonotic disease of likely bat origin that has affected millions of humans along with devastating global consequences. The implementation of One Health measures is highly recommended for the effective prevention and control of possible zoonosis.


2019 ◽  
Vol 40 (1) ◽  
pp. 13-25 ◽  
Author(s):  
Bogumił M. Nowak ◽  
Mariusz Ptak

Abstract The article presents the analysis of water level fluctuations in Lake Powidzkie in the years 1961–2015. The study shows a considerable decrease in mean water levels in the aforementioned multiannual period, averaging 9 cmꞏdecade−1. Such a situation is caused by natural as well as anthropogenic factors, co-determining water relations in the study area. The natural factors include the amount and distribution of precipitation, increase in air temperature and evaporation size, unfavourable relations between the lake and catchment or hydrogeological conditions. Anthropogenic factors particularly include long-term transformations of the natural environment in the region, currently associated with meliorations accompanying the nearby opencast brown coal mines and exploitation of groundwaters for municipal purposes. Water shortages occurring during dry periods were shown not to be compensated in the study area in humid years. This is particularly related to the regional lowering of the aquifer remaining in close relations with Lake Powidzkie. Counteracting the unfavourable hydrological situation is done through hydrotechnical infrastructure which partially limits water outflow from the lake through damming.


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