scholarly journals Studi Variabilitas Produktivitas Primer Bersih Serta Hubungannya dengan El-Nino Southern Oscillasion (ENSO) dan Indian Ocean Dipole (IOD) di Laut Banda Berdasarkan Data Satelit Aqua MODIS

2018 ◽  
Vol 5 (1) ◽  
pp. 64
Author(s):  
Ni Luh Novita Aryanti ◽  
I Gede Hendrawan ◽  
Yulianto Suteja
Keyword(s):  
Primary Productivity ◽  
Net Primary Productivity ◽  
Pearson Correlation ◽  
Correlation Method ◽  
Production Model ◽  
Productivity Data ◽  
Fish Catch ◽  
The Relationship ◽  
High Catch ◽  
Medium Correlation

Banda Sea is one of the waters had rich of fish catch. The high catch of fish was related with primary productivity of these waters. Net Primary productivity in the Banda Sea was related with some oceanographic factors such as current, ARLINDO, upwelling and downwelling. The oceanographic factors are influenced by ENSO and IOD. The aim of this research to explained the variability of net primary productivity in Banda Sea and its relation with oceanography factor such as ENSO and monsoon. Data that used in this research were data from MODIS satellite and for analysis of net primary productivity data used Vertically Generalized Production Model (VGPM). The relation of net primary productivity with ENSO and IOD can used pearson correlation method. The result of net primary productivity value in Banda Sea was about 100 gCm-2day-1 - 1200 gCm-2day-1, with the highest apex net primary productivity in August precisely in the east season. The high value of net primary productivity due to upwelling in the season. The value of net primary productivity in west season was decreased. This condition caused by the downwelling of the season. The region with the highest net primary productivity value was the northeast of Banda Sea and the region with lowest net primary productivity value was the western of Banda Sea. The relationship between ENSO with net primary productivity in Banda Sea classified in medium correlation with value 0,556, while relationship between IOD and net primary productivity classified in weak correlation with value 0,23.

scholarly journals Features of the cytokine balance in infectious hemorrhagic colitis in children

2019 ◽  
Vol 18 (3) ◽  
pp. 11-16 ◽  
Author(s):  
O. I. Klimova ◽  
N. V. Gonchar ◽  
Yu. V. Lobzin ◽  
L. A. Alekseeva ◽  
N. E. Monakhova
Keyword(s):  
Young Children ◽  
Pearson Correlation ◽  
Correlation Method ◽  
Relative Number ◽  
Suppressive Effect ◽  
Hemorrhagic Colitis ◽  
Cytokine Balance ◽  
Severity Of The Disease ◽  
Relationship Of ◽  
The Relationship

The aim of the study was to study the features of cytokine balance and their effect on clinical and laboratory parameters in infectious hemorrhagic colitis in children. Materials and methods. In the Department of intestinal infections in 2018 observed 28 children with infectious haemorrhagic colitis. The diagnosis was established taking into account clinical recommendations; the severity of the disease was determined by the Clark index; the etiology was verified according to bacteriological and molecular studies of feces, serological methods. In the acute period of the disease, the concentration of cytokines in the blood serum — TNF-a, IL-4, IL-6, IL-10 was studied by enzyme immunoassay. Mann-Whitney method, Kruskal-Wallis dispersion analysis, Pearson correlation method we used to estimate the obtained data.Results. The age structure of patients was dominated by young children (53.6%). Mild form of the disease was diagnosed in 32.1% of patients, moderate — in 67.9%. A high level of IL-4 was observed against a relatively low level of TNF-a, IL-6 and IL-10. Significantly higher concentrations of TNF-a and IL-6 were found in children with moderate form of the disease. The maximum values of IL-6 were observed in young children, IL-10 — in infants. In the moderate form of the disease, negative correlations of IL-4 with the number of leukocytes (r = –0.46; p = 0.05) and platelets (r = –0.48; p < 0.05) in the hemogram noted. Early age patients were found to have correlations of TNF-a with the relative number of rod neutrophils (r = 0.62; p < 0.01). There was a significant correlation of IL-4 with the relative number of segmental neutrophils (r = 0.49; p < 0.05). The relationship of TNF-a with the severity of the disease (r = 0.42; p < 0.05) revealed. The data on the possible suppressive effect of TNF-a and IL-10 on the synthesis of urea and the relationship of IL-6 with reactive changes in the liver obtained.Conclusion. Studies of cytokine balance in infectious hemorrhagic colitis in children showed the severity of systemic inflammatory response with the activation of Th-2 immune response. The correlation of TNF-a with the severity of the disease was established, which may have diagnostic and prognostic value.

scholarly journals Does insect herbivory suppress ecosystem productivity? Evidence from a temperate woodland

2021 ◽  
Author(s):  
Kristiina Visakorpi ◽  
Sofia Gripenberg ◽  
Yadvinder Malhi ◽  
Terhi Riutta
Keyword(s):  
Gas Exchange ◽  
Leaf Area ◽  
Primary Productivity ◽  
Net Primary Productivity ◽  
Leaf Gas Exchange ◽  
Insect Herbivory ◽  
Ecosystem Productivity ◽  
Area Loss ◽  
Leaf Area Loss ◽  
The Relationship

AbstractOur current understanding of the relationship between insect herbivory and ecosystem productivity is limited. Previous studies have typically quantified only leaf area loss, or have been conducted during outbreak years. These set-ups often ignore the physiological changes taking place in the remaining plant tissue after insect attack, or may not represent typical, non-outbreak herbivore densities. Here, we estimate the amount of carbon lost to insect herbivory in a temperate deciduous woodland both through leaf area loss and, notably, through changes in leaf gas exchange in non-consumed leaves under non-outbreak densities of insects. We calculate how net primary productivity changes with decreasing and increasing levels of herbivory, and estimate what proportion of the carbon involved in the leaf area loss is transferred further in the food web. We estimate that the net primary productivity of an oak stand under ambient levels of herbivory is 54 - 69% lower than that of a completely intact stand. The effect of herbivory quantified only as leaf area loss (0.1 Mg C ha−1 yr−1) is considerably smaller than when the effects of herbivory on leaf physiology are included (8.5 Mg C ha−1 yr−1). We propose that the effect of herbivory on primary productivity is non-linear and mainly determined by changes in leaf gas exchange. We call for replicated studies in other systems to validate the relationship between insect herbivory and ecosystem productivity described here.

scholarly journals Persepsi terhadap Kemampuan Komunikasi Interpersonal Orang Tua dengan Kecenderungan Kenakalan Remaja

2019 ◽  
Vol 4 (2) ◽  
pp. 135
Author(s):  
Fadiah Awanis ◽  
Maria Goretti Adiyanti
Keyword(s):  
High School ◽  
Juvenile Delinquency ◽  
Interpersonal Communication ◽  
Negative Correlation ◽  
Pearson Correlation ◽  
Correlation Method ◽  
Study Data ◽  
Male And Female ◽  
Communication Ability ◽  
The Relationship

This study aims to determine the relationship between perception of parent’s interpersonal communication ability with juvenile delinquency tendency. The hypothesis of this study is the perception of parent’s interpersonal communication ability have a negative correlation with juvenile delinquency tendency. Participants consisted of 100 male and female middle adolescent who studied in several senior high school in Yogyakarta. The Perception of Parent’s Interpersonal Communication Ability Scale (18 item) and The Tendency of Juvenile Delinquency Scale (25 item) were used in this study. Data were analyzed using Product Moment Pearson Correlation method with SPSS version 21. The result showed that the perception of parent’s interpersonal communication ability significantly has a negative correlation with juvenile delinquency tendency (r=-0,295, p<0,01).

scholarly journals HUBUNGAN PRODUKTIVITAS PRIMER FITOPLANKTON DENGAN KETERSEDIAAN UNSUR HARA DAN INTENSITAS CAHAYA DI PERAIRAN TELUK KENDARI SULAWESI TENGGARA

2013 ◽  
Vol 13 (2) ◽  
Author(s):  
Nur Irawati, Enan M. Adiwilaga Dan Niken T.M. Prawtiwi
Keyword(s):  
Light Intensity ◽  
Primary Productivity ◽  
Net Primary Productivity ◽  
River Mouth ◽  
Sampling Station ◽  
Nutrient Element ◽  
Data Description ◽  
Average Value ◽  
Main Factors ◽  
The Relationship

ABSTRAKPenelitian ini merupakan kajian tentang hubungan produktivitas primer fitoplankton denganketersediaan unsur hara dan intensitas cahaya di perairan Teluk Kendari. Penelitian ini dilaksanakan diPerairan Teluk Kendari pada bulan April – Juni 2009 dengan menempatkan 3 stasiun penelitian.Tujuan penelitian adalah mengkaji hubungan antara produktivitas primer fitoplankton (NPP) denganketersediaan unsur hara dan intensitas cahaya (ICM) di perairan Teluk Kendari. Hasil penelitianmenunjukkan bahwa nilai produktivitas primer selama penelitian pada perairan Teluk Kendari yaitupada stasiun luar teluk berkisar 16,99 – 26,37 mgC/m3/4 jam, pada stasiun tengah teluk 21,09 – 31,25mgC/m3/4 jam, dan 11,13–24,61 mgC/m3/4 jam pada stasiun dalam teluk. Hubungan produktivitasprimer dengan unsur hara dan ICM memperlihatkan keeratan hubungan yang kuat pada ketiga stasiunpenelitian sedang produktivitas primer dengan unsur hara dan ICM menunjukkan pola yang hampirsama pada ketiga stasiun penelitian. Pada stasiun luar teluk, unsur hara amonia dan nitrat bersamaICM menjadi faktor yang memberikan pengaruh nyata terhadap tinggi rendahnya nilai NPP, sedangpada stasiun tengah dan dalam teluk, unsur hara nitrat dan ICM memberikan pengaruh yang nyataterhadap tinggi dan rendahnya nilai NPP di perairan Teluk Kendari.ABSTRACTThe sudy on the Phytoplankton primary productivity relationship to the availability of nutrientelement and light intensity in the waters of Kendari Bay was conducted on April-June 2009 at threesites. The purpose of this research was to examine the relationship between primary productivity ofphytoplankton with nutrient availability and light intensity in the waters of the Bay of Kendari. Basedon the data description and laboratory analysis, net primary productivity values during the surveyperiod varied from 11.13 to 31.25 mgC/m3/4 hour with ranges of average value of NPP from 20.0 to24.46 mgC/m3/4 hour. Sampling station located at the middle of the bay had the highest NPP valuefollowed by sampling station positioned at the mouth of the bay and the lowest value was found atsampling station located near the river mouth of the upper part of the bay. Relationship betweenprimary productivity and light intensity depicted a strong correlation at the three sampling stations.Relationship of primary productivity to nutrient and light intensity showed that the relationship werehigh in all three stations. Similar pattern of relationship were shown among the three stations. At thestation located out of the Kendari Bay, nutrient element N (both ammonia and nitrate) and lightintensity were the main factors that signifacantly influence the level of NPP value, while stationlocated in the middle and inside the bay, results reveal that nitrate and light intensity had significatinflunce on the level of NPP values.Key words: primary productivity of phytoplankton, nutrient elements, light intensity

scholarly journals SPATIO-TEMPORAL CHANGES OF NET PRIMARY PRODUCTIVITY AND ITS RESPONSE TO PHENOLOGY IN NORTHEAST CHINA DURING 2000–2015

2018 ◽  
Vol XLII-3 ◽  
pp. 1453-1459
Author(s):  
Y. Qiu ◽  
L. Zhang ◽  
D. Fan
Keyword(s):  
Primary Productivity ◽  
Northeast China ◽  
Net Primary Productivity ◽  
Time Series Data ◽  
Meteorological Data ◽  
Geographical Location ◽  
Growing Season ◽  
Series Data ◽  
Threshold Method ◽  
The Relationship

The relationship between net primary productivity (NPP) and phenological changes is of great significance to the study of regional ecosystem processes. In this study, firstly, NPP was estimated with the remote sensing model based on the SPOT-VGT NDVI dataset (2000&amp;ndash;2015), meteorological data and the vegetation map in Northeast China. Then, using NDVI time series data which was reconstructed by polynomial fitting, phenology was extracted with the dynamic threshold method. Finally, the relationship between NPP and phenology was analyzed. The results showed that NPP mainly increased in the cropland, grassland, forestland and shrubland; however, vegetation NPP decreased in the ecotone among cropland, grassland and forestland. Correlation analysis suggested that the relationships between NPP and phenological metrics (i.e., the start of the growing season (SOS), the end of the growing season (EOS), the length of the growing season (LOS)) were different due to geographical location. On the whole, there was a positive correlation between NPP and the LOS in the forestland, and negative in the cropland and grassland, indicating that extended LOS can promote the accumulation of forestland NPP. By analyzing the monthly NDVI data during the vigorous growth period, the increase of NPP in the grassland and cropland was mainly due to the better growth from June to August, and shortened LOS did not lead to reduce the NPP. Generally, the response of NPP to phenology in Northeast China were more complex, showing obvious difference of vegetation types and spatial variability, we need to consider topography, community structure and other factors in the further studies.

scholarly journals INDEKS KEKERINGAN SPI (STANDARDIZED PRECIPITATION INDEX) DAN PENGARUHNYA TERHADAP PRODUKTIVITAS HORTIKULTURA TAHUNAN DI KABUPATEN JEMBER

2019 ◽  
Vol 2 (4) ◽  
pp. 149
Author(s):  
Arzaky Ardi Surya Nugroho ◽  
Cahyoadi Bowo ◽  
Joko Sudibya
Keyword(s):  
Standardized Precipitation Index ◽  
Correlation Method ◽  
Precipitation Index ◽  
World Meteorological Organization ◽  
Rainfall Data ◽  
Climate Fluctuations ◽  
Productivity Data ◽  
The Standardized Precipitation Index ◽  
The Impact ◽  
The Relationship

ABSTRACT Perennial tropical horticulture is a superior product whose productivity is affected by water availability. The impact of climate fluctuations due to global warming affects the availability of ground water. This study aims to determine the effect of the Standardized Precipitation Index (SPI) drought index derived from rainfall data on the productivity of perennial horticulture (durian, avocado and rambutan). The study was conducted from July 2016 - November 2018 in 9 sub-districts in Jember Regency where has the highest production. Rainfall data is proceed into SPI data according to the guidelines of the WMO (World Meteorological Organization). Productivity data derived from production data divided by the number of plants. The results of 12 monthly SPI calculations compared with the perennial horticultural productivity data. To find out the relationship between productivity and SPI, the correlation method is used. The results showed that the appropriate SPI value for observing annual horticultural productivity was SPI 9 and 12 monthly. The value of SPI greatly influences the correlation of productivity of durian, avocado and rambutan. Keywords: SPI, productivity, annual horticulture. ABSTRAK Tanaman hortikultura tropis tahunan adalah produk unggulan yang produktivitasnya dipengaruhi oleh ketersediaan air. Dampak fluktuasi iklim akibat pemanasan global mempengaruhi ketersediaan air tanah. Penelitian ini bertujuan untuk mengetahui pengaruh index kekeringan SPI yang berasal dari data curah hujan terhadap produktivitas hotikultura tahunan (durian, alpukat dan rambutan). Penelitian dilakukan mulai bulan Juli 2016 – November 2018 pada 9 Kecamatan dengan produksi tertinggi di Kabupaten Jember. Data curah hujan diolah menjadi data SPI sesuai pedoman WMO (World Meteorological Organization) dan data produktivitas berasal dari data produksi dibagi jumlah tanaman kemudian hasil perhitungan SPI 12 bulanan dibandingkan dengan data produktifitas hortikultura t ahunan. Untuk mengetahui hubungan produktivitas dan SPI digunkan metode korelasi. Hasil penelitian menunjukkan nilai SPI yang sesuai untuk mengamati produktivitas hortikultura tahunan adalah SPI 9 dan 12 bulanan. Nilai SPI sangat berpengaruh terhadap korelasi produktivitas durian, alpukat dan rambutan. Nilai SPI yang semakin tinggi menaikkan produktivitas durian, tetapi menurunkan produktivitas alpukat dan rambutan. Kata Kunci : SPI, produktifitas, hortikuktura tahunan

Influence of spring phenology on seasonal net primary productivity in the alpine grassland on the Tibetan Plateau

2020 ◽  
Author(s):  
Zhoutao Zheng ◽  
Wenquan Zhu ◽  
Yangjian Zhang ◽  
Ke Huang ◽  
Nan Cong
Keyword(s):  
Primary Productivity ◽  
Net Primary Productivity ◽  
Growing Season ◽  
Ecosystem Model ◽  
Alpine Grassland ◽  
The Tibetan Plateau ◽  
Field Observations ◽  
Vegetation Phenology ◽  
Spring Phenology ◽  
The Relationship

&lt;p&gt;Vegetation phenology is recognized to exert crucial influences on carbon sequestration and the role of vegetation phenology in mediating carbon cycle varies with ecosystem type. However, the relationship between vegetation phenology and productivity has not been fully understood in the alpine ecosystem due to a lack of field observations, poor model performances and their complex mechanisms. In this study, we examined the spatio-temporal variation in beginning of growing season (BGS) and net primary productivity (NPP) for the alpine grassland on the Tibetan Plateau (TP) and the regulation effects of spring phenology on seasonal NPP by integrating field observations, remote sensing monitoring and ecosystem model simulation. The ecosystem model performances were improved by optimizing ecosystem parameters from field observations. The results indicated a significant advance in BGS with a rate of 0.31 days/yr (P &lt; 0.1) in the alpine grassland during 2001-2015 while the annual NPP increased significantly at a rate of 1.25 gC/m&lt;sup&gt;2&lt;/sup&gt;/yr (P &lt; 0.01). With regard to the relationship between BGS and NPP, large spatial heterogeneities were identified. Overall, a negative but non-significant correlation (R = -0.34, P &gt; 0.1) was observed between BGS and annual NPP for the entire grassland ecosystem on the TP. But responses of NPP to BGS varied with seasons. Specifically, BGS showed significant negative correlation with spring NPP (R = -0.73, P &lt; 0.01), and advanced spring led to increased spring NPP. The positive effects of advanced BGS on NPP tended to weaken in summer. Moreover, BGS was significantly and positively correlated with autumn NPP in some relatively arid zones of the southwestern TP, suggesting the suppressing effects of earlier spring on carbon assimilation during the later growing season in water limited areas. This study improved our understanding on the impacts of biotic factors on carbon cycles of the alpine ecosystem and implies that the effects of phenology can&amp;#8217;t be concluded simply for an annual sum, and their relationships for each separate season are also critical.&lt;/p&gt;

scholarly journals THE RELATIONSHIP BETWEEN STUDENTS’ MOTIVATION AND THEIR LEARNING ACHIEVEMENT

2019 ◽  
Vol 1 (6) ◽  
pp. 783
Author(s):  
Hilva Yanuarti ◽  
Dian Rosmayanti
Keyword(s):  
Pearson Correlation ◽  
Learning Achievement ◽  
Relationship Motivation ◽  
Correlation Degree ◽  
The Subject ◽  
Second Year ◽  
Science Major ◽  
The Relationship ◽  
Academic Year ◽  
Medium Correlation

Among the factor influencing students learning, motivation becomes one of the momentous factors that  may affect students learning achievement. The aim of this study is to investigate the relationship between students’ motivation and their learning achievement. The subject were 88 second year students at Science major class of an Islamic high school in Cimahi City in the second semester of the Academic year 2018. The research uses quantitative corelation as a method consisting of two variables, namely students motivation (independent) and students achievement (dependent). The writers uses questionnaire as an instrument to collect the data and the student English score from their English teacher. The data analyze use SPSS. Finding from this study indicate that there are any relationship between students motivation and their learning achievement. The relationship between students’ motivation and their English learning achievement was   significantly and has Medium Correlation. When the result showing 0.580 appropriate with Pearson Correlation degree Value 0.41 s/d 0.60 = Medium Correlation. Keywords:  Relationship, Motivation, Achievement

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