scholarly journals Radial Growth Adaptability to Drought in Different Age Groups of Picea schrenkiana Fisch. & C.A. Mey in the Tianshan Mountains of Northwestern China

Forests ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 455
Author(s):  
Liang Jiao ◽  
Xiaoping Liu ◽  
Shengjie Wang ◽  
Ke Chen
Keyword(s):  
Climate Change ◽  
Drought Stress ◽  
Old Age ◽  
Tree Species ◽  
Radial Growth ◽  
Forest Ecosystems ◽  
Middle Age ◽  
Age Groups ◽  
Tianshan Mountains ◽  
Picea Schrenkiana

Forest ecosystems are strongly impacted by extreme climate, and the age effects of radial growth under drought can provide profound understanding of the adaptation strategy of a tree species to climate change. Schrenk spruce (Picea schrenkiana Fisch. & C.A. Mey) trees of three age groups (young, middle-aged, and old) were collected to establish the tree-ring width chronologies in the eastern Tianshan Mountains of northwestern China. Meanwhile, we analyzed and compared the response and resistance disparities of radial growth to drought in trees of different age groups. The results showed that (1) drought stress caused by increasing temperatures was the main factor limiting the radial growth of Schrenk spruce, (2) the old and young trees were more susceptible to drought stress than the middle-aged trees, as suggested by the responses of Schrenk spruce trees and based on the SPEI (standardized precipitation evapotranspiration index), and (3) the difference of the resistance indexes (resistance, recovery, resilience, and relative resilience) of three age groups to drought supported that the resistance values were in the order middle age > young age > old age, but the recovery, resilience, and relative resilience values were in the order old age > young age > middle age. These results will provide a basis for the ecological restoration and scientific management of dominant coniferous tree species of different age groups in the sub-alpine forest ecosystems of the arid regions under climate change scenarios.

Responses to climate change in radial growth of Picea schrenkiana along elevations of the eastern Tianshan Mountains, northwest China

2016 ◽  
Vol 40 ◽  
pp. 117-127 ◽  
Author(s):  
Liang Jiao ◽  
Yuan Jiang ◽  
Mingchang Wang ◽  
Xinyu Kang ◽  
Wentao Zhang ◽  
...  
Keyword(s):  
Climate Change ◽  
Radial Growth ◽  
Northwest China ◽  
Tianshan Mountains ◽  
Eastern Tianshan ◽  
Picea Schrenkiana

scholarly journals Age-Effect Radial Growth Responses of Picea schrenkiana to Climate Change in the Eastern Tianshan Mountains, Northwest China

Forests ◽  
2017 ◽  
Vol 8 (9) ◽  
pp. 294 ◽  
Author(s):  
Liang Jiao ◽  
Yuan Jiang ◽  
Mingchang Wang ◽  
Wentao Zhang ◽  
Yiping Zhang
Keyword(s):  
Climate Change ◽  
Radial Growth ◽  
Northwest China ◽  
Age Effect ◽  
Tianshan Mountains ◽  
Growth Responses ◽  
Eastern Tianshan ◽  
Picea Schrenkiana

Intra-annual radial growth of Schrenk spruce ( Picea schrenkiana Fisch. et Mey) and its response to climate on the northern slopes of the Tianshan Mountains

2016 ◽  
Vol 40 ◽  
pp. 36-42 ◽  
Author(s):  
Ruibo Zhang ◽  
Yujiang Yuan ◽  
Xiaohua Gou ◽  
Tongwen Zhang ◽  
Chen Zou ◽  
...  
Keyword(s):  
Radial Growth ◽  
Tianshan Mountains ◽  
Picea Schrenkiana

scholarly journals Distribution of eggs and adults of alaska plaice Pleuronectes quadrituberculatus and flathead sole Hippoglossoides elassodon (Pleuronectidae) in the Pacific waters of Kamchatka

2021 ◽  
Vol 201 (2) ◽  
pp. 400-415
Author(s):  
R. T. Ovcherenko ◽  
D. Ya. Saushkina
Keyword(s):  
Old Age ◽  
Middle Age ◽  
Age Groups ◽  
Biological Parameters ◽  
Young Fish ◽  
Southeastern Kamchatka ◽  
Pacific Waters ◽  
The Pacific ◽  
Embryo Cleavage ◽  
Hippoglossoides Elassodon

Distribution and biological parameters are considered for eggs and adults of two flatfish species on the data of annual surveys conducted on the shelf of southeastern Kamchatka in summer of 2011–2014 and 2016–2019. The eggs of Pleuronectes quadrituberculatus were sampled mostly at the stage of a germinal strip forming, whereas the eggs of Hippoglossoides elassodon were mostly at the stage of embryo cleavage. The main congestions of the eggs were found in the Kronotsky Bay and northern Avachinsky Bay. The adults of both species concentrated mainly in the northern Kronotsky Bay, at Cape Povorotny. Old age groups prevailed in aggregations of P. quadrituberculatus, but middle-age and young fish — in the aggregations of H. elassodon.

scholarly journals Prevalence and comparative likelihood of urinary tract infection (UTI) among female out patients in BSMMU

2013 ◽  
Vol 40 (2) ◽  
pp. 231-239
Author(s):  
Hamida Khanum ◽  
Fahmida Munir ◽  
AZM Shafiullah ◽  
Farhana Muznebin
Keyword(s):  
Escherichia Coli ◽  
Urinary Tract Infection ◽  
Urinary Tract ◽  
Relative Risk ◽  
Tract Infection ◽  
Old Age ◽  
Middle Age ◽  
Age Groups ◽  
Urine Samples ◽  
E Coli

Out of 200 urine samples of female out patients from BSMMU hospital, 128 (64%) cases were detected as Escherichia coli positive, 66.67% of cases in summer and 60% in winter. To compare the risks of E. coli infection in summer and winter and also among different age groups, odd ratio (OR) and relative risk (RR) were used as measures of comparative likelihood. The values of both OR and RR were greater than one when the risk of E. coli infection of adults (16-35) was compared with that of middle age (36-50) and old age (51-70) groups. The adults were always at higher risk of UTI by E. coli, and the livelihood of infection was not equal in summer and winter. DOI: http://dx.doi.org/10.3329/bjz.v40i2.14317 Bangladesh J. Zool. 40(2): 231-239, 2012

scholarly journals Climate change within Serbian forests: Current state and future perspectives

Topola ◽  
2021 ◽  
pp. 39-56
Author(s):  
Dejan Stojanović ◽  
Saša Orlović ◽  
Milica Zlatković ◽  
Saša Kostić ◽  
Verica Vasić ◽  
...  
Keyword(s):  
Climate Change ◽  
Tree Species ◽  
Forest Ecosystems ◽  
Insect Pests ◽  
Heat Waves ◽  
Ground Vegetation ◽  
Human Society ◽  
Climate Conditions ◽  
Pests And Diseases ◽  
Precipitation Decrease

Extreme weather conditions, namely droughts, heat waves, heavy rains, floods, and landslides are becoming more frequent globally and in Serbia as a result of climate change. Generally, various parts of human society are affected by changing climate conditions. Forest ecosystems are one of the most sensitive systems to weather and climate. In that sense, small changes may lead to large disturbances including forest decline, outbreaks of insect pests and diseases and eventually mortality. In Serbia, the average temperature in forest ecosystems of the most important and abundant forest tree species has risen for more than 1°C in the last thirty years (1990-2019) in comparison to the previous period (1961-1990). During the last thirty years, the northern and western parts of Serbia experienced an increase in precipitation as opposed to the southern and eastern parts of the country. If one takes a closer look at the climate within a particular forest stands, it would seem that the effect of precipitation decrease is stronger in less humid parts of a tree species range. In this paper, we discuss various aspects of climate change impacts on forests and forestry, including forest ecology, genetics, physiology, pests and diseases, ground vegetation, monitoring, reporting and verification system, climate change litigation and perspectives of forests in the 21st century in Serbia.

Age-Specific Analysis of Injury; In Between Youth and Old, Late Middle Ages Increases Injury Vulnerability (Preprint)

2020 ◽  
Author(s):  
Hansol Chang ◽  
Ji Young Min ◽  
Dajeong Yoo ◽  
Sung Yeon Hwang ◽  
Hee Yoon ◽  
...  
Keyword(s):  
Emergency Department ◽  
Injury Prevention ◽  
Old Age ◽  
Middle Age ◽  
Age Groups ◽  
Age Group ◽  
Prevention Strategies ◽  
Group 4 ◽  
Group 3 ◽  
Group 1

BACKGROUND Injury is a leading cause of both mortality and moderate and severe disability. Injury is preventable, and there had been many injury prevention strategies in the past. Age is one factor that affects injury characteristics. OBJECTIVE This study aimed to investigate the national prevalence of injury by age groups to probe new injury prevention strategies. METHODS This data was collected retrospectively from the Emergency Department-based Injury In-depth Surveillance (EDIIS) in South Korea, including patient data who visit 25 emergency departments between January 2011 and December 2017. Patients were divided into four groups by age: 18 to 34 years as group 1; 35 to 49 years, group 2; 50 to 64 years, group 3; 65 years and over, group 4. RESULTS A total of 1,221,746 patients were included, and each age group had a different injury pattern. Group 3 injury outcomes and injured body parts are similar to Group 4. This is why old age injury prevention strategies should be devised right from middle age and not after old age. Interestingly, in our study, Group 4 and Group 1 both were unlikely to have worn seatbelt when traffic injury occurred, which is different compared to other country studies. CONCLUSIONS In our study, each age group shows diverse characteristics in the mode of injury, place, time, and outcome and Group3, which represents late middle age, shows increased vulnerability. Therefore, it is imperative that all age groups have their own injury prevention method and more caution is needed in late middle age injury. CLINICALTRIAL This data was collected retrospectively from the Emergency Department-based Injury In-depth Surveillance (EDIIS) in South Korea.This study was approved by the Institutional Review Board (IRB) of Samsung Medical Center, IRB No. 2020-05-042.

Responses of radial growth of two dominant tree species to climate change on Changling Mountain

2019 ◽  
Vol 39 (17) ◽  
Author(s):  
贾飞飞 JIA Feifei ◽  
孙翠洋 SUN Cuiyang ◽  
孙红月 SUN Hongyue ◽  
李鑫 LI Xin
Keyword(s):  
Climate Change ◽  
Tree Species ◽  
Radial Growth
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