Wyniki wyszukiwania - Biblioteka Nauki

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Assessing Impact of Land Use/Land Cover Dynamic on Urban Climate Change in a Semi-Arid Region -Case Study of Agadir City (Morocco)

100%

Idoumskine I. , Aydda A. , Ezaidi A. , Ramouch K. , Ait Haddou M.

Ecological Engineering & Environmental Technology

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2024

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tom Vol. 25, iss. 4

172--187

EN

This research sought to assess historically the urban expansion of Agadir city in Morocco within the 35-year timespan (1984-2019), and the influence of those changes on the regulating services of Agadir. It was achieved by applying support vector machine supervised (SVM) algorithm on each Landsat products to derive land use/ land cover (LULC) maps. High accuracy assessment values were obtained for all Landsat classified maps. Spectral radiance model was exploited successfully to highlight the spatiotemporal changes of thermal behavior of city surfaces. Terrestrial carbon dynamics of Agadir LULC was evaluated by applying a process-based carbon model. The outcomes of this paper revealed an important urban expansion within the 35-year timespan with an important loss of vegetation and bare land. This urban evolution impacts the land surface temperature (LST) and caused carbon storage loss that contributes to local climate change. These findings could assist policy-makers to characterize a sustainable evolution of urban area, especially, to interpret how and where LULC changes might alter the dynamics of climate regulation and ecosystem services.

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Efficiency of different forest types in carbon storage depends on their internal structure

86%

Gheorghe I. F. , Biris I. A. , Valcu C.-M.

Acta Societatis Botanicorum Poloniae

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2010

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tom 79

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nr 4

EN

Forest vegetation is a key factor in the maintenance of global carbon cycle balance under the present climate change conditions. Forest ecosystems are both buffers against extreme climatic events accompanying climate change and carbon sinks diminishing the environmental impact of anthropogenic greenhouse gas emissions. We investigated the influence of stand structure and site characteristics on the productivity and carbon storage capacity of temperate forest types. Predictors of species productivity were parameters such as stand density, age, height, average diameter and wood density. Morus alba (L.) was more productive than average both in terms of annual volume increment and annual biomass gain, while Quercus sessiliflora (Matt.) Lieb. and Quercus frainetto (Ten.) were significantly less productive than average. Differences in stand productivity were explained by stand density, age, height, altitude, type of regeneration and species composition. Statistically significant differences were measured between the productivity of stands dominated by different woody species, with low productive stands dominated by slow growing species with high wood density like Quercus or Fagus, and highly productive stands rich in fast growing species with low wood density like Populus or Salix. Stands with different plant communities in the underlying herbaceous layer also tended to have different levels of productivity.

3

Changes in carbon storage of Masson Pine Forests along a latitudinal gradient with different stand structures in Southern China

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Wu Q. , Ma H. , Peng Y. , Yan W. , Pan D.

Polish Journal of Ecology

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2021

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tom Vol. 69, nr 3-4

137--155

EN

The spatial patterns of carbon pool in landscape vary greatly with variation of forest structures and climate conditions. In this field study, the carbon storage in overstory, understory, litter layer of plants and soil carbon in forests was investigated in 26-28 year-old Masson pine (Pinus massoniana) pure and mixed forests along a latitudinal gradient (20–30 °N) crossing Hunan and Guangxi provinces of China, during the period of May 2015–August 2017. We found that the total carbon storage in Masson pine forests ranged 88.92–149.41 Mg/ha, of which 54.03% occurred in aboveground compound and 45.97% occurred belowground. The overall total carbon storage distribution was 34.62–68.72 Mg/ha, 3.82–10.19 Mg/ha, 2.37–3.96 Mg/ha, and 6.06–12.08 Mg/ha in stems, branches, leaves, and roots, respectively. The carbon storage in the overstory of forest stands and forest soils significantly decreased with increasing latitude, while the carbon storage in the understory and litter of the forest stands significantly increased as the latitude increased. The overall carbon storage significantly decreases by 8.26 Mg/ha in Masson pine forests as the latitude increased by one degree. The carbon storage increased by 8.43% in Masson pine mixed forests compared to the pure forest stands after the transformation from the pure forest stands into the mixed forest stands ∼ 15 years later. The results of changes in carbon storage in the studied forests with the latitudinal gradient could be attributed to variations in hydrothermal conditions with changing latitudes. The forest structure with different tree species composition was another important factor regulating carbon storage in forest ecosystems at the same latitude. The results provided a scientific basis for better understanding of latitudinal variation and spatial distribution of carbon storage in Masson pine forest stands with optimal forest stand structures in subtropical region of China.

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Badania stężenia C02 w powietrzu podgłebowym w rejonie Tarnowa pod kątem monitoringu składowania dwutlenku węgla

86%

Tarkowski R. , Uliasz-Misiak B. , Wdowin M. , Batkiewicz K.

Rocznik Ochrona Środowiska

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2010

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tom Tom 12

847-860

PL

Pomiary koncentracji dwutlenku węgla w powietrzu podglebowym, na obszarze pomiędzy Jastrząbka Stara i Różą, pozwoliły na opracowanie metodyki pomiarów oraz określenie stężeń CO2 w powietrzu podglebowym. Badania wykonano w 25 punktach pomiarowych wokół dwóch otworów produkujących ropę naftową oraz przy drodze pomiędzy nimi, w 12 seriach pomiarowych. Zaobserwowano zmienność stężenia tego gazu w zależności od pory roku oraz lokalizacji punktu pomiarowego. Najwyższe pomierzone stężeniaCO2 stwierdzono w miesiącach letnich na obszarze pól uprawnych przy drodze pomiędzy otworami produkcyjnymi oraz w ich bezpośrednim sąsiedztwie. Porównując wyniki uzyskane z poszczególnych lat zauważono ich powtarzalność. Podkreślić należy, że wyniki pomiarów stężeń CO2 w powietrzu glebowym przekraczają często 1%, a nawet dochodzą do 5%, co znacznie odbiega od tych z innych obszarów (poniżej 0,5%). Uzyskane wyniki prezentują obraz koncentracji CO2 w powietrzu glebowym i można traktować jako tło tego gazu na badanym obszarze.

EN

Geological carbon dioxide storage has different kinds of risks for people and environment in global as well as in local scale. That's why monitoring is so important for the whole process of carbon dioxide storage. The main purpose is to follow gas migration under ground, to control seal of injection wells during and after injection, verification of injected carbon dioxide quality and also control of parameters connected with injection. Preparation and carrying out of geological storage monitoring of carbon dioxide is required by Directive of European Parliament andCouncil 2009/31/WE in case of geological storage from 23 of April 2009 [18]. One of the basic research connected with carbon dioxide storage monitoring is establishing of the CO2 concentration (background) in the ground/soil air before starting the injection. Such a researches are done also during and after the end of injecting gas to underground reservoir. If the important differences in CO2 concentration are stated they can suggest that gas has escaped. Presented research results concern CO2 concentration measurements in soil air in the area of Jastrzabka Stara oil field near Tarnow. Carbon dioxide injection as an Enhanced Oil Recovery (EOR) can increase oil production from the reservoir which is in the last exploitation stage. Carbon dioxide concentration measurements in ground/soil air were made between 2005-2008 using Detector MultiReaPlus based on IR radiation absorbance. To select appropriate research methodics the measurements were preceded by researches. They were made each time in drilling wells, 80 cm under ground in the area and between production wells JSt-8 and JSt-12. There were defined 25 sampling points in which about 300 measurements were done in all seasons. Results of three years research showed that CO2 concentration values change seasonal in the sampling points. Concentration changes were connected also with weather conditions (air temperature changes and precipitation). Localization of the sampling points have an important influence on the findings. Through the three years research the repeatability of research results in sampling points during circle of the seasons was found. Thanks to this research the background for CO2 concentration in this area was established.

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Application of AHP method to assess the possibilities of using of geological structures located in the aquifers as underground storage sites

86%

Lewandowska-Śmierzchalska J. , Uliasz-Misiak B.

AGH Drilling, Oil, Gas

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2017

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tom Vol. 34, no. 2

361--374

EN

Decision-making problem with assessing of the suitability of geological structures located in aquifers in terms of their use for carbon storage, natural gas storage or waste injection is mainly connected with the necessity of taking into consideration a large number of criteria and analyze a lot of parameters. It also connected with making many independent decisions concerning geological, environmental, social, political, technical or legal issues. This article shows the possibility of using the AHP method, ie. multi-criteria hierarchical methods to analysis of decision problems in assessment the potential of aquifers. AHP method allows to take reasonable decision. The article was divided into three parts. The first one includes a characteristics of geological structures located in aquifers, special attention was paid to the criteria describing these structures. In the second part, the basis for decision-making system based on the method of AHP, which was used to carry out the hierarchical scoping assessment of potential structures. Validation of decision-making system was realized on selected geological structures located on the Polish Lowlands. An assessment of the possibilities to use the two anticline in the Mesozoic aquifers was made. As a result, received the criteria ranking, rankings of decision variants to all criteria and global ranking of variants. Based on the results obtained can be determine which decision represents a priority way of use structure.

6

Identifying priority areas for the conservation of ecosystem services using GIS-based multicriteria evaluation

86%

Liu Y. , Zhang H. , Yang X. , Wang Y. , Wang X. , Cai Y.

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tom 61

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nr 3

EN

The rapid global urban growth poses a great risk to the ecosystem services which are vital to sustaining and fulfilling human life. As an essential part of Fuzhou eco-planning task in south-eastern China, we identified the priority conservation areas for ecosystem services to allow a sustainable urban expansion. We modeled and mapped five ecosystem services (carbon storage, timber production, water yield, water-quality improvement and sediment retention) using InVEST and proposed a definition of priority areas for the conservation of ecosystem services. Priority areas for individual ecosystem services showed that 24% of the region was needed to produce 26% of water yield. Between 6 and 17% of the region was required to conserve at least 20% of other four services, depending on the ecosystem service of interest. In addition, scenarios for multiple ecosystem services conservation were developed using the ordered weighted averaging (OWA) method, a multicriteria evaluation method, to take the tradeoffs among ecosystem services into account. The results showed that, along with the decrease of the OWA risk, the overall areas and the areas at both of the conservative levels dropped gradually. Furthermore, two efficiency indices were created to evaluate the performance of different OWA scenarios. Study results suggested that the efficiency of scenarios was associated with the conservation threshold and OWA risk, as well as the spatial correlation among ecosystem services. In sum, identifying priority areas for ecosystem services in a spatially explicit manner, and analyzing tradeoffs between them, can help make land use and natural resource decisions more effective and efficient.

7

Biomass partition and carbon storage of Cunninghamia lanceolata chronosequence plantations in Dabie Mountains in East China

72%

Xie X. , Cui J. , Shi W. , Liu X. , Tao X. , Wang Q. , Xu X. N.

Dendrobiology

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2016

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tom 76

EN

The quantification of biomass carbon pools is important for understanding carbon cycling in forest ecosystems. This study was designed to reveal the effects of stand age on biomass partitioning and carbon storage of Chinese fir plantation stands in Dabie Mountains of Anhui, East China. A total of six even-aged Chinese fir plantation stands along an age-sequence from 10 to 50 years were selected. To quantify the biomass of different tree components, 18 trees with diameter at breast height (D1.3) from 6.5 to 35.2 cm were harvested from the different aged stands. Biomasses of understory vegetation, forest floor and standing dead trees were also investigated. Total biomass carbon storages ranged from 57.6 to 211.4 Mg ha–1 in the different aged stands. Tree layer comprised from 93.7% to 96.4% of the total biomass C pools in the different aged stands. The C pools of the necromass were from 1.8 to 6.2 Mg ha–1. Stand age had a significant effect on tree biomass partitioning, with an increase in proportion of root biomass. The root/shoot ratios were from 0.187 to 0.312, which was significantly positively correlated to stand age. The existing plantation stands are still developing and have somewhat high rate of biomass and carbon accumulations beyond the normal rotation period (usually 25–30 years) even over an age of 50 years. Appropriate prolongation of the rotation period of Chinese fir plantation will be effective in maintaining long-term productivity and providing large carbon sink. The measurements provide valuable data for modelling productivity of Chinese fir plantation forest.

8

The ways of creating public perception of CCS-technologies in Russian Federation

72%

Vasilev Y.

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2020

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tom z. 145

559--567

EN

Purpose: to determine the ways of widening the public awareness of CCS technologies and, therefore, creating some level of public perception Design/methodology/approach: The method of achieving the goals and tasks of this article is the secondary research of articles of foreign researchers related to formation of public opinion on climate change mitigation in general and, in particular, development of CCS projects. Besides, it is necessary to review Russian school textbooks to find the information about climatic problems. Findings: It is necessary to review the experience of foreign countries to determine the ways of shaping public opinion on the climate change issues and decreasing the level of CO2 in the Russian Federation. Originality/value: The article shows the major results of the survey: awareness of high environmental risks lowers public acceptance, the government plays a key role in environmental management, traditional and electronic media information can lower the perceived risk and improve the public acceptance of CCUS.

9

Carbon storage of cycad and other gymnosperm ecosystems in China: implications to evolutionary trends

58%

Ma Y. , Jiang H. , Wang B. , Zhou G. , Yu S. , Peng S. , Hao Y. , Wei X. , Liu J. , Yu Z.

Polish Journal of Ecology

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2009

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tom 57

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nr 4

635-646

EN

Cycads are an ancient lineage of plants that originated in the Permian, which are vital to the interpretation of plant ecology. The evidence in the fossil records indicates that the morphological and anatomical features of cycads are remarkably similar to the extant taxa, which has been instrumental in our understanding the connections between the early origins of seed plants and their present-day counterparts. The cycad ecosystem is an important vegetation type throughout geological time. Research on the ecological function of the cycad plays a significant role in the study of evolutionary ecology. In this study, we investigated the biomass, productivity and total carbon storage (total of vegetation, litter, and soil carbon) of cycad (Cycas panzhihuaensis L. Zhou et S.Y. Yang) ecosystems in the National C. panzhihuaensis Reserve of China (latitude 26°37′, longitude 101°35′, at 1635 m altitude) by applying the site-standard tree sampling harvest.Cycads are considered to be rare and endangered species, and are in the list of key protected wild plants in the world. The National C. panzhihuaensis Reserve is in Southwestern China, which area approximately 1358 ha, growing approximately 20 000 C. panzhihuaensis individuals. 20 sample plots, each 5 × 5 m were established in the spring of 2006. The mean height of cycads within the stand was 0.44 m and the mean basal diameter was 23.2 cm. The biomass and productivity data for other communities was compiled from references published over the past 20 years throughout China. The biomass and productivity of cycad ecosystems (8.102 ± 6.880 t C ha⁻¹ and 1.183 ± 0.975 t C ha⁻¹ yr⁻¹, respectively) are smaller than tree fern (Alsophila spinulosa (Wall. ex Hook.) R. M. Tryon) or gymnosperm (Pinaceae, Cupressaceae or Taxodiaceae for representative) ecosystems. The community biomass of Pinaceae-, Cupressaceae- or Taxodiaceae-dominated ecosystems are 6.8, 5.4, and 5.3 times larger than the cycad ecosystem, respectively. The productivity of each is 2.3, 2.8 and 3.8 times larger than the cycad ecosystem. Cycad is an ancient dioecious plant. However, the results show that the differences between the biomass of male and female cycads, as well as the productivity, are not significant.

10

Carbon storage of cycad and other gymnosperm ecosystems in China: implications to evolutionary trends

58%

Ma Y. , Jiang H. , Wang B. , Zhou G. , Yu S. , Peng S. , Hao Y. , Wei X. , Liu J. , Yu Z.

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tom Vol. 57, nr 4 (2

635-646

EN

Cycads are an ancient lineage of plants that originated in the Permian, which are vital to the interpretation of plant ecology. The evidence in the fossil records indicates that the morphological and anatomical features of cycads are remarkably similar to the extant taxa, which has been instrumental in our understanding the connections between the early origins of seed plants and their present-day counterparts. The cycad ecosystem is an important vegetation type throughout geological time. Research on the ecological function of the cycad plays a significant role in the study of evolutionary ecology. In this study, we investigated the biomass, productivity and total carbon storage (total of vegetation, litter, and soil carbon) of cycad (Cycas panzhihuaensis L. Zhou et S.Y. Yang) ecosystems in the National C. panzhihuaensis Reserve of China (latitude 26[degrees]37', longitude 101[degrees]35', at 1635 m altitude) by applying the site-standard tree sampling harvest. Cycads are considered to be rare and endangered species, and are in the list of key protected wild plants in the world. The National C. panzhihuaensis Reserve is in Southwestern China, which area approximately 1358 ha, growing approximately 20 000 C. panzhihuaensis individuals. 20 sample plots, each 5 x 5 m were established in the spring of 2006. The mean height of cycads within the stand was 0.44 m and the mean basal diameter was 23.2 cm. The biomass and productivity data for other communities was compiled from references published over the past 20 years throughout China. The biomass and productivity of cycad ecosystems (8.102 [plus or minus] 6.880 t C ha[^-1] and 1.183 [plus or minus] 0.975 t C ha[^-1] yr[^-1], respectively) are smaller than tree fern (Alsophila spinulosa (Wall. ex Hook.) R. M. Tryon) or gymnosperm (Pinaceae, Cupressaceae or Taxodiaceae for representative) ecosystems. The community biomass of Pinaceae-, Cupressaceae- or Taxodiaceae-dominated ecosystems are 6.8, 5.4, and 5.3 times larger than the cycad ecosystem, respectively. The productivity of each is 2.3, 2.8 and 3.8 times larger than the cycad ecosystem. Cycad is an ancient dioecious plant. However, the results show that the differences between the biomass of male and female cycads, as well as the productivity, are not significant.

11

Signals and mechanisms regulating carbon storage in plants and biotechnological applications for crop improvement

58%

Geigenberger P.

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nr 2 Spec.Vol.