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Wyszukujesz frazę "change dynamics" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Econometric Analysis of the Impact of Climate Change on the Sustainability of Agricultural Production in Ukraine
Autorzy:
Skrypnyk, Andriy
Zhemoyda, Oleksandr
Klymenko, Nataliia
Galaieva, Liudmyla
Koval, Tatiana
Powiązania:
https://bibliotekanauki.pl/articles/1839135.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
global climate change
acreage dynamics
climate change
modeling
crop pattern
crop acreage
panel regression
time series
Opis:
The aim of this paper was to determine the mechanisms of climate change impact on the yield of the main exportoriented crops in the agro-climatic zones of Ukraine. The study of the problem of changing the acreage of the main export-oriented crops was conducted according to the data of the State Statistics Service of Ukraine on the time horizon 2000-2018 in the following order: first, the dynamics of the change of the acreage under corn, sunflower and wheat by the agro-climatic zones of Ukraine was analyzed; secondly, the trends of yield changes of these crops were investigated based on the increase in the difference in yields between the northern and southern zones; and, finally, the temporal and spatial expansion in the area of crop propagation were investigated by applying the panel regression method. The findings obtained indicate that the applied models confirm the assumption of the effects of climate change on crop yield changes and the zones expansion in the northern direction. If the country’s wheat area can be considered stable (variation is insignificant), then the corn and sunflower areas have grown steadily under the influence of increasing demand from national and world markets. At the same time, the growing acreage under corn and sunflower occurred in all climatic zones. Stable expansion of corn crops in the north direction in all three agroclimatic zones of Ukraine has been statistically confirmed. The article presents the findings of empirical analysis, which confirm that if the boundaries of soil and climatic zones change, the conditions of growing crops and their yield will consequently change as well. Thus, based on current global forecasts, the impact of weather on Ukraine’s agriculture will increase, and the most negative effects can be expected in the Steppe zone, where the likelihood of weather and climate risks increases, requiring the development of adaptation and mitigation measures as well as exploitation of new potential opportunities that are being opened. Studies have shown that there is an expansion in crops to the north and a change in their pattern, including a significant increase in the area under corn.
Źródło:
Journal of Ecological Engineering; 2021, 22, 3; 275-288
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diurnal dynamics of stomatal conductance and leaf temperature of grapevines (Vitis vinifera L.) in response to daily climatic variables
Dobowa dynamika przewodności szparkowej i temperatury liści winorośli (Vitis vinifera L.) w reakcji na dzienne zmienne klimatyczne
Autorzy:
Sabir, A.
Yazar, K.
Powiązania:
https://bibliotekanauki.pl/articles/11543007.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
diurnal dynamics
stomatal conductance
grapevine
leaf
temperature
Vitis vinifera
plant response
climate change
sunlight
Opis:
Few studies examined the stomatal conductance (gs) characteristics of grapevines with an emphasis on daily climatic responses. In the present study, diurnal measurements on leaf temperature and gs of three grapevine cultivars (Alphonse Lavallée, Crimson Seedless and Italia) were carried out. The leaf temperature values for the cultivars at 08:30 were 25.0 ±1°C and it increased to a maximum value between 12:00 and 14:50 p.m. After an almost steady course, it decreased along with the decrease in ambient temperature. The gs values increased from morning (08:30 a.m.) to mid-morning (10:30 a.m.) for all the cultivars. After reaching a peak level at mid-morning, the gs decreased gradually from the mid-morning throughout the afternoon. In the morning, the highest and the least gs values were obtained from Italia (232 mmol H2O m-2 s-1) and Crimson Seedless (149.6 mmol H2O m-2 s-1) cultivars. At around 10:30, the gs for Italia, Crimson Seedless and Alphonse Lavallée were at the highest levels with their valus 287.7, 262.1 and 242.0 mmol H2O m-2 s-1, respectively. The last measurements on gs at around 16:10 varied from to 96.7 (Italia) to 112.0 mmol H2O m-2 s-1 (Alphonse Lavallée). During the daily time course, the gs depended mainly on irradiance. Tleaf showed a strong relationship with Tair for all the cultivars. There was a strong, but negative correlation between leaf temperature and air humidity for all the cultivars.
Istnieje niewiele badań, które zajmowały się cechami przewodności szparkowej (gs) winorośli z akcentem na dzienne zmienne klimatyczne. W niniejszym badaniu przeprowadzono pomiary temperatury liści oraz gs trzech odmian winorośli (Alphonse Lavallée, Crimson Seedless i Italia). Temperatura liści u tych odmian o godzinie 8.30 wynosiła 25,0 ±1°C i zwiększała się do maksymalnej wartości między 12.00 a 14.50. Po okresie prawie wyrównanych wartości temperatura spadała wraz ze spadkiem temperatury otoczenia. Wartości gs rosły w godzinach porannych (8.30–10.30) dla wszystkich odmian. Po osiągnięciu poziomu szczytowego, gs stopniowo zmniejszała się począwszy od godzin rannych przez całe popołudnie. Największe i najmniejsze wartości gs rano osiągnięto u odmian Italia (232 mmol H2O m-2 s-1) i Crimson Seedless (149,6 mmol H2O m-2 s-1). Około 10.30 wartości gs dla Italia, Crimson Seedless oraz Alphonse Lavallée były największe i wynosiły, odpowiednio, 287,7; 262;1 i 242,0 mmol H2O m-2 s-1. Ostatni pomiar gs około 16.10 wskazywał od 96,7 (Italia) do 112,0 mmol H2O m-2 s-1 (Alphonse Lavallée). Podczas dnia gs zależał głównie od napromieniowania. Tliść wykazywał silny związek a Tpowietrze dla wszystkich odmian.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2015, 14, 4; 3-15
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Do seasonal dynamics influence traits and composition of macrobenthic assemblages of Sundarbans Estuarine System, India?
Autorzy:
Bhowmik, M.
Mandal, S.
Powiązania:
https://bibliotekanauki.pl/articles/2079001.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
seasonal dynamics
macrobenthic assemblage
macroinvertebrate
climate change
taxonomic analysis
ecosystem functioning
biological trait
estuarine system
India
Opis:
The present study investigates the influence of seasonal dynamics on macrobenthic assemblages in four seasons of 2017—2018 from the central sector of Indian Sundarbans which is under the constant threat of climate change. Besides taxonomic analysis, a traitbased approach has also been applied to assess the change in their ecosystem functioning. The maximum species density (11675 ± 11883.31 ind. m−2) was observed during the spring season which declines considerably in the monsoon season (5875 ± 6224.08 ind. m−2). A total of 95 macrobenthic taxa were recorded from Sundarbans and they were dominated by families like Capitellidae, Donacidae, Magelonidae, Nereididae, Paraonidae and Spionidae. Overall, polychaetes have shown higher taxonomic and functional variation than other groups. Opportunistic polychaete species have shown a prominent compositional shift during post-monsoon seasons. Both the univariate and multivariate analyses have shown a significant relation between macrobenthic composition and environmental parameters. SIMPER has depicted that environmental parameters made the station 4 unique for several types of molluscs like Acteocina estriata, Stenothyra deltae and Meretrix meretrix during spring. Trait percentages also showed a seasonal succession pattern and among the trait categories, burrowers and deposit feeders dominated the estuary. A gradual increase in suspension feeders in spring has been noticed. RLQ approach with fourth-corner analysis was used to unravel the relationship between traits and environmental parameters. Hence, the present study provided a comprehensive idea about the species composition along with their trait categories from such a dynamic habitat. That could be the first stepping stone for a long term monitoring of macrobenthic assemblages from this largest delta on earth.
Źródło:
Oceanologia; 2021, 63, 1; 80-98
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sea-level change and projected future flooding along the Egyptian Mediterranean coast
Autorzy:
Shaltout, M.
Tonbol, K.
Omstedt, A.
Powiązania:
https://bibliotekanauki.pl/articles/48806.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
sea level
Egyptian Mediterranean coast
Nile Delta
climate change
flooding
satellite altimetry
topography
geophysical fluid dynamics
Źródło:
Oceanologia; 2015, 57, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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