scholarly journals Coastal Wetlands: Ecosystems Affected by Urbanization?

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 698
Author(s):  
Vanessa Novoa ◽  
Octavio Rojas ◽  
Ramón Ahumada-Rudolph ◽  
Katia Sáez ◽  
Pablo Fierro ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Coastal Wetlands ◽  
Fecal Coliform ◽  
Texture Classification ◽  
Sediment Texture ◽  
Multivariate Statistical ◽  
Macroinvertebrate Assemblage ◽  
Freshwater Budget ◽  
Negative Impacts ◽  
Wetlands Ecosystems

Coastal wetlands are ecosystems that provide multiple benefits to human settlements; nonetheless, they are seriously threatened due to both a lack of planning instruments and human activities associated mainly with urban growth. An understanding of their functioning and status is crucial for their protection and conservation. Two wetlands with different degrees of urbanization, Rocuant-Andalién (highly urbanized) and Tubul-Raqui (with little urbanization), were analyzed using temperature, salinity, dissolved oxygen, pH, turbidity, granulometry, fecal coliform, and macroinvertebrate assemblage variables in summer and winter. In both wetlands marked seasonality in salinity, temperature and sediment texture classification, regulated by oceanic influence and changes in the freshwater budget, was observed. In the Rocuant-Andalién wetland, the increases in pH, dissolved oxygen, gravel percentage, and coliform concentration were statistically significant. Urbanization generated negative impacts on macroinvertebrate assemblage structure that inhabit the wetlands; greater richness and abundance (8.5 times greater) were recorded in the Tubul-Raqui wetland than in the more urbanized wetland. The multivariate statistical analysis reflects the alteration of these complex systems.

scholarly journals Penanganan Parameter yang Hilang dalam Aplikasi Penilaian Kualitas Air IKA-INA

Jurnal Ecolab ◽  
2021 ◽  
Vol 15 (2) ◽  
pp. 101-109
Author(s):  
Dewi Ratnaningsih ◽  
◽  
Retno Puji Lestari ◽  
Ernawita Nazir
Keyword(s):  
Dissolved Oxygen ◽  
Chemical Oxygen Demand ◽  
Fecal Coliform ◽  
Oxygen Demand ◽  
Total Suspended Solid ◽  
Suspended Solid ◽  
Biological Oxygen Demand ◽  
Total Phosphate ◽  
Total Dissolved Solid

Kualitas air di suatu wilayah yang merupakan salah satu indikator lingkungan dapat dievaluasi menggunakan parameter fisika, kimia, dan biologi. Indeks Kualitas Air Indonesia (IKA-INA) dapat digunakan untuk menilai kondisi kualitas air secara menyeluruh pada lokasi dan waktu tertentu. IKA-INA dihitung dengan menggunakan sepuluh (10) parameter yaitu pH, Total Dissolved Solid (TDS), Total Suspended Solid (TSS), Dissolved Oxygen (DO), Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), NO3, NH3, Total Phosphate (TP) dan fecal coliform. IKA-INA tersebut merupakan indeks kualitas air yang dapat memberikan informasi secara sederhana. Dalam pemanfaatannya, tidak semua data parameter dalam IKA-INA tersebut dapat terpenuhi karena adanya data tidak valid atau data yang hilang. Kajian ini bertujuan untuk memberi alternatif rumusan IKA-INA dengan parameter yang tidak lengkap atau jika tidak semua data dalam parameters tersebut tersedia. Metode yang digunakan dalam menyusun rumusan adalah dengan melakukan koreksi faktor bobot parameter IKA-INA terhadap parameter yang hilang dan nilai Q (nilai sub-indeks). Setelah itu dilakukan uji coba pada nilai baku mutu air dalam Peraturan Pemerintah No. 22/2021 Lampiran VI serta pada data kualitas air sungai yang mewakili kualitas baik dan buruk. Hasil uji coba menunjukkan bahwa bobot parameter terkoreksi dapat digunakan untuk penanganan parameter yang hilang dalam penilaian kualitas air dengan metode IKA-INA. Hasil IKA-INA dengan parameter hilang yang menggunakan bobot terkoreksi dan hasil IKA-INA dengan parameter lengkap mayoritas memberikan status IKA yang tidak berbeda, kecuali untuk parameter fecal coli dan parameter yang mempunyai kadar jauh berbeda terhadap kondisi air secara keseluruhan.

Survey of the Water Quality of the Bahar County Streams (Iran) by NSFWQI

2015 ◽  
Vol 16 (SE) ◽  
pp. 395-403
Author(s):  
Abbas Ghaffari Habib ◽  
Seyed Hadi Khatami
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Fecal Coliform ◽  
Agricultural Sector ◽  
Oxygen Demand ◽  
Total Dissolved Solids ◽  
Biological Oxygen Demand ◽  
Dissolved Solids ◽  
The Mean

In Bahar County (Iran), rivers are among the important sources of water for the agricultural sector. Therefore, this research evaluated the parameters of temperature, pH, Total Dissolved Solids (TDS), turbidity, nitrate, total phosphate, dissolved oxygen (DO), Biological Oxygen Demand (BOD5), and fecal coliform at five stations for five months (from February 2015 to June 2015) to determine water quality in the rivers. Based on this evaluation, the NSFWQI index was calculated and, finally, the routes of the rivers were zoned. The best water quality was recorded at Station Number 3 with the NSFWQI Value of 80 in January, and the worst at Station Number 5 (latgah) with the NSFWQI Value of 37 in June. Based on the mean NSFWQI indices, water quality was Medium at Stations Number 1, 2, and 4, good at Station Number 3, and bad at Station number 5.

scholarly journals The Effect of Nitric Oxide on Amaranthus Tricolor L. Under Cadmium Stress

2021 ◽  
Author(s):  
Fatemeh Baniasadi ◽  
Masoud Arghavani ◽  
Vahid Reza Saffari ◽  
Mehdi Mansouri
Keyword(s):  
Nitric Oxide ◽  
Lipid Peroxidation ◽  
Cadmium Stress ◽  
Total Protein Content ◽  
Plant Tolerance ◽  
Cd Stress ◽  
Multivariate Statistical ◽  
Cd Toxicity ◽  
Medium Level ◽  
Negative Impacts

Abstract This study aimed to appraise the crosstalk between sodium nitroprusside (SNP), as a source of nitric oxide (NO), and cadmium (Cd) toxicity on growth and physiological traits in Amaranth tricolor L. by using different multivariate statistical methods. The results showed that growth-related traits of A. tricolor were significantly reduced (p<0.05) under Cd stress. Contrarily, Cd treatments increased lipid peroxidation and reduced total protein content. Delving on the results of SNP application showed the suitability of its medium level (100 µM) on increasing the growth-related traits and also plant tolerance to Cd stress via lowering the lipid peroxidation and radical molecules production due to the higher activities of superoxide dismutase and catalase. Increasing the amount of Cd in roots and shoots, as the results of Cd treatment, reduced the growth and production of A. tricolor plants by high rates (over 50% in 60 mg kg-1 Cd level) indicating its susceptibility to high Cd toxicity. Contrarily, treating plants with NO showed no effect on shoot Cd content, while it significantly increased Cd allocation in the root, which might be attributable to the protective effect of NO on Cd toxicity by trapping Cd in the root. Subsequently, the application of a medium level of SNP (around 100 µM) is recommendable for A. tricolor plant to overcome the negative impacts of Cd toxicity.

scholarly journals Early Invasion of Common Cordgrass (Spartina Anglica) Increases Belowground Biomass and Decreases Macrofaunal Density and Diversity in a Tidal Flat Marsh

2021 ◽  
Author(s):  
Wonhyeop Shin ◽  
Minwoo Oh ◽  
Jae-Sang Hong ◽  
Chaeho Byun ◽  
Eun Ju Lee
Keyword(s):  
Tidal Flat ◽  
Coastal Wetlands ◽  
Belowground Biomass ◽  
Invasion History ◽  
Spartina Anglica ◽  
Large Size ◽  
Negative Impacts ◽  
Deposit Feeding ◽  
Insight Into ◽  
Suaeda Japonica

Abstract Spartina anglica is an invasive perennial marsh grass causing significant negative impacts on tidal flat ecosystem. There have been only a few studies focusing on the patch structure of S. anglica according to size and its effects on macrofauna. A field experiment was conducted to identify effects of S. anglica patches where they have been introduced no later than 5 years after invasion occurred on macrofauna assemblages. The survey area was divided into two sections according to vegetation: (1) Suaeda japonica vegetation from 0 to 60 m away from the embankment, and (2) bare mudflat from 60 to 90 m away from the embankment. The patch sizes of S. anglica were categorized into small (1–4 m2), medium (5–11 m2), and large (13–40 m2) in area with four replicates for each section. The biomass ratio of the belowground and aboveground in the small size patch of S. anglica was significantly higher than those in the medium and large size patch of S. anglica. It indicated that more resource was allocated to rhizomes in small size patch with short invasion history (1 ~ 2 years). After S. anglica invaded, macrofauna richness (70%), Shannon-Wiener diversity (80%), and density (67%) were decreased. However, infaunal deposit-feeding polychaete Perinereis linea and epifaunal gastropods Batillaria cumingi and Lactiforis takii increased by S. anglica. Ordination of macroinvertebrate assemblages separated the habitat with S. anglica invasion from the adjacent uninvaded tidal flat and Suaeda japonica habitats. This study offers a significant insight into early invasion strategies of an aggressive plant invader, S. anglica for management of coastal wetlands and its impacts on macrofaunal assemblages.

scholarly journals Habitat Preferences of PokeA (Batissa violacea var. celebensis von Martens, 1897) Basic on Substrat Characterisation in Pohara River Southeast Sulawesi

2020 ◽  
Vol 4 (2) ◽  
pp. 74-82
Author(s):  
Bahtiar Bahtiar ◽  
Muh. Fajar Purnama
Keyword(s):  
Habitat Preferences ◽  
Principal Component ◽  
Coarse Sand ◽  
Sediment Texture ◽  
Chi Square ◽  
Multivariate Statistical ◽  
Entire Cross Section ◽  
Lack Of Information ◽  
And Cluster Analysis ◽  
Sand And Gravel

This research is motivated by the lack of information about the habitat preferences of pokea clams in Pohara River, Southeast Sulawesi. This study aims to determine the density, distribution pattern and habitat preferences of pokea clams in the Pohara River, Southeast Sulawesi. This research was conducted for 6 months (April-September 2011). Sampling of pokea, water quality, and sediment texture was carried out in the Pohara River and analyzed at the FPIK UHO Laboratory. The density and distribution of pokea were calculated using a standard formula and analyzed using Mann Whitney and Chi Square respectively, while the habitat preferences based on different substrate textures were analyzed using Principal Component Analysis (PCA) and Cluster Analysis (CA) in the Multivariate Statistical Package (MVSP). The results showed that the density of pokea clams ranged from 117±96.78-816±594.84 ind/m2 which was distributed in cluster over the entire cross-section of the river. Pokea clams were found in all substrate textures from gravel to clay. The habitat preference of pokea clams indicated by the highest density was found in the clay texture. Pokea clams relatively do not like the habitat of coarse sand and gravel texture which is characterized by pokea population with the lowest density

scholarly journals Correlates of Work-Study Conflict among International Students in Australia: A Multivariate Analysis

2019 ◽  
Vol 16 (15) ◽  
pp. 2695
Author(s):  
Thamrin ◽  
Pisaniello ◽  
Guerin ◽  
Rothmore
Keyword(s):  
International Students ◽  
Student Retention ◽  
International Student ◽  
Online Survey ◽  
Health And Safety ◽  
Negative Influence ◽  
Work Study ◽  
Multivariate Statistical ◽  
Safety Issues ◽  
Negative Impacts

International students represent an increasingly large segment of the Australian workforce. Most international students are working while studying, but there is a scarcity of quantitative data regarding potential work-study conflicts. Data from an online survey were analyzed with multivariate statistical methods to clarify the risk factors associated with perceived work–study conflicts in an Australian university. More than 66% of students felt that working demands interfered with their study. Negative impacts included tiredness and timetable clashes. Statistically significant correlates of work–study conflict were a perception of unfair wages and a lack of confidence in discussing occupational health and safety issues with employers. Underpayment may signify other vulnerabilities, such as unsafe working conditions. As many universities seek to increase their international student enrolments, these are important factors to consider for student retention. To mitigate this potential negative influence on study, universities should provide education and training related to international students’ rights and responsibilities in the workplace.

The impact of cleaner processing on nutrient availability in the bleached kraft industry

2007 ◽  
Vol 55 (6) ◽  
pp. 165-172 ◽  
Author(s):  
A.H. Slade ◽  
P.H. Maclean ◽  
F.F.H. van Otterdijk
Keyword(s):  
Dissolved Oxygen ◽  
Paper Industry ◽  
Ammonium Phosphate ◽  
Phosphorus Limitation ◽  
Treatment System ◽  
Oxygen Levels ◽  
Negative Impacts ◽  
The Impact ◽  
Bod Removal

The pulp and paper industry has invested heavily over recent years in cleaner processing, to reduce losses and minimise its impact on the environment. Over the past fifteen years, a New Zealand integrated bleached kraft mill has undergone a comprehensive programme of upgrades to increase production, reduce water consumption and streamline its biological treatment process. Whilst the overall discharge of contaminants from the site decreased, the treatment system performance did not show a concurrent improvement as may have been expected. Reduced BOD removal, low dissolved oxygen levels, and poor solids settlability were symptomatic of phosphorus limitation in the aerated lagoon treatment system. The wastewater entering the system was found to be phosphorus limited at a BOD:P ratio of 100:0.2. Mono-ammonium-phosphate was supplemented, at approximately 30 kg P/d, to raise the phosphorus levels to a BOD:P ratio of 100:0.3. Treatment efficiencies improved very quickly after phosphorus dosage, with a 50% reduction in BOD and TSS discharge, a significant increase in dissolved oxygen levels, and improved BOD removal (85% to 93%). This case study demonstrates that whilst more closed operation can result in reduced discharge of organic loads, there may be negative impacts on the availability of nutrients for balanced biological growth.

scholarly journals Cluster Analyze Approach in Monitoring Some Physico-Chemical Parameters of Drinking Water from Municipal Network of Cluj-Napoca Town

2011 ◽  
Vol 68 (2) ◽  
Author(s):  
Antonia ODAGIU ◽  
Ioan Gheorghe OROIAN ◽  
Tania MIHĂIESCU ◽  
Ilie COVRIG ◽  
Dan VÂRBAN
Keyword(s):  
Drinking Water ◽  
Dissolved Oxygen ◽  
Electric Conductivity ◽  
Water Source ◽  
Data Matrix ◽  
Multivariate Statistical ◽  
Water Point ◽  
Physico Chemical ◽  
The Difference ◽  
Internal Homogeneity

A data matrix, obtained from a 2-year (2010 – 2011) monitoring programme, was subjected to cluster analyze to obtain information about pH, electric conductivity and dissolved oxygen drinking water sampled from six sites, to identify possible variances in drinking water quality, and problems in town pipe network, even indications on its toxicity. The drinking water analyzed parameters were also compared to the same parameters quantified in samples prelevated from town water source – Tarniţa Lake. The data were processed with STATISTICA v.7.0 programme. The suitability of multivariate statistical analyze (CA in our case) for discussing the monitoring parameters was demonstrated by the kurtosis and skewness values. The spatial CA emphasizes of three clusters for pH, two clusters for electrical conductivity with high internal homogeneity, and high external heterogeneity (p < 0.001), and three clusters for dissolved oxygen with high internal homogeneity and moderate external heterogeneity (p < 0.05), and with different degrees of similarities. Very significant and distinctly significant differences, respectively, were reported between pH and electric conductivity of average drinking water sample from Cluj-Napoca town network and supplying drinking water point (Tarniţa Lake), while concerning the dissolved oxygen, the difference was statistically not significant.

scholarly journals Impact of Environmental Factors on the Carbon Dynamics at Hooghly Estuarine Region

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Joyita Mukherjee ◽  
Moitreyee Banerjee ◽  
Arnab Banerjee ◽  
Madhumita Roy ◽  
Phani Bhusan Ghosh ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Soil Carbon ◽  
Environmental Variables ◽  
Carbon Dynamics ◽  
Mangrove Forests ◽  
Estuarine Ecosystem ◽  
Multivariate Statistical ◽  
Dissolved Carbon ◽  
The Impact ◽  
Soil And Water

Degradation of litter from mangrove forests adjacent to the creeks at Sagar Island of the Hooghly-Matla estuarine ecosystem is one of the principal sources of nutrient to the estuary. This system receives a major load of carbon from adjacent mangrove forest in the form of litterfall throughout the year. Keeping in view, the effect of environmental factor on the dynamics of carbon is studied through multivariate statistics. Essential environmental variables like soil carbon, dissolved carbon, temperature, salinity, pH, and dissolved oxygen are analyzed following standard protocol. Multivariate statistical analyses like correlation, regression, and centered PCA ordination are done in order to know the impact of environmental variables on carbon dynamics. The results reflect a close intercorrelation among the studied environmental variables and carbon. It also emphasizes the fact that soil and water temperature, and dissolved oxygen affect soil carbon dynamics, whereas salinity and pH of soil and water greatly regulate dissolved carbon dynamics. The variance pattern of these studied variables through seasons is also enumerated by PCA ordination studies.

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