Influence of Suspended Solid on in situ and ex situ Chlorophyll-a: A Case Study of Indian Sundarbans

2013 ◽  
pp. 179-190
Author(s):  
Atanu Kumar Raha ◽  
Kakoli Banerjee ◽  
Susmita Das ◽  
Abhijit Mitra
Keyword(s):  
Chlorophyll A ◽  
Suspended Solid ◽  
Ex Situ ◽  
Indian Sundarbans

scholarly journals TINGKAT KESUBURAN PERAIRAN KOLAM AGROWISATA UIR DITINJAU DARI KONSENTRASI KLOROFIL-a PHYTOPLANKTON DI KECAMATAN SIAK HULUKABUPATEN KAMPARPROVINSI RIAU

2019 ◽  
Vol 33 (1) ◽  
pp. 115-120
Author(s):  
Muhammad Hasby
Keyword(s):  
Water Quality ◽  
Chlorophyll A ◽  
Fertility Rate ◽  
Ex Situ ◽  
Chlorophyll A Concentration ◽  
Phytoplankton Concentration

This study aims to determine the level of water fertility in the UIR Agro-tourism pond in the District of Siak Hulu, Kampar Regency, Riau Province based on the concentration of chlorophyll-a phytoplankton. The study was carried out for 6 months in the Agro-tourism pond in Riau Islamic University. Analysis of water fertility in situ and ex-situ. The parameters measured were chlorophyll-a phytoplankton concentration and water quality. The method used is a case study (survey). The treatment in this study was 3 replications in one week on the clock and the same pool sequence. The results showed that the pond fertility rate of UIR Agro-tourism was quite productive, namely chlorophyll-a concentration of 1-20 µg / l with an abundance of phytoplankton of 104 cells / l.

scholarly journals The Majella National Park: a case study for the conservation of plant biodiversity in the Italian Apennines

2020 ◽  
Vol 10 ◽  
pp. 1-24
Author(s):  
Valter Di Cecco ◽  
Marco Di Santo ◽  
Michele Di Musciano ◽  
Aurelio Manzi ◽  
Mirella Di Cecco ◽  
...  
Keyword(s):  
National Parks ◽  
National Park ◽  
Central Italy ◽  
Regional Level ◽  
Ex Situ ◽  
Plant Biodiversity ◽  
Massif Central ◽  
Italian Apennines

The Majella National Park (MNP) is a tangible example of the interaction between ex-situ and in-situ conservation of endemic, rare, or endangered species at a Regional level in the context of the Italian national parks. The MNP has the facilities and carries out activities for the conservation of plant biodiversity: it includes botanical gardens, a seed bank, a nursery, and a network of “guardian farmers”, an authentic “granary” in which to protect and conserve biodiversity in and around the Majella massif (central Italy).

scholarly journals Management of local genetic resources by in situ and ex situ methods for research and breeding purpose: the case study of the local animal breeds of Guadeloupe and Martinique

2010 ◽  
Vol 1 (2) ◽  
pp. 395-396
Author(s):  
Michel J. Naves ◽  
Rémy Arquet ◽  
Alain Farant ◽  
Félix X. Quenais ◽  
Jean Luc Gourdine ◽  
...  
Keyword(s):  
Genetic Resources ◽  
Ex Situ

scholarly journals Structural Vulnerability Assessment of Heritage Timber Buildings: A Methodological Proposal

Forests ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 881
Author(s):  
Amirhosein Shabani ◽  
Mahdi Kioumarsi ◽  
Vagelis Plevris ◽  
Haris Stamatopoulos
Keyword(s):  
Construction Material ◽  
Ex Situ ◽  
Structural Vulnerability ◽  
Environmental Threats ◽  
Construction Techniques ◽  
Vulnerability Assessments ◽  
Different Types ◽  
Risk Knowledge

The conservation of heritage structures is pivotal not only due to their cultural or historical importance for nations, but also for understanding their construction techniques as a lesson that can be applied to contemporary structures. Timber is considered to be the oldest organic construction material and is more vulnerable to environmental threats than nonorganic materials such as masonry bricks. In order to assess the structural vulnerability of heritage timber structures subjected to different types of risk, knowledge about their structural systems and configurations, the nature and properties of the materials, and the behavior of the structure when subjected to different risks, is essential for analysts. In order to facilitate the procedure, different assessment methods have been divided into the categories in situ and ex situ, which are applicable for vulnerability assessments at the element and full-scale level of a case study. An existing methodology for structural vulnerability assessments and conservation of heritage timber buildings is reviewed and a new methodology is proposed.

scholarly journals STUDI KUALITAS AIR TANAH KOTA MAGELANG AKIBAT DAMPAK LIMBAH DOMESTIK DAN INDUSTRI

2020 ◽  
Vol 5 (2) ◽  
pp. 120
Author(s):  
Muhammad Tri Aji ◽  
Abdul Qadir Jailani
Keyword(s):  
Chemical Oxygen Demand ◽  
Oxygen Demand ◽  
Total Suspended Solid ◽  
Total Coliform ◽  
Suspended Solid ◽  
Biological Oxygen Demand ◽  
Ex Situ ◽  
Purposive Sampling ◽  
Total Dissolved Solid

Era milenial ini permasalahan air sebagai sumber kehidupan semakin terasa. Terutama pada air tanah yang menjadi salah satu sumber kehidupan sehari – hari mulai dari aktifitas rumah tangga sampai aktifitas industri. Permasalahan air tanah semakin terasa apabila diiringi dengan laju pertumbuhan penduduk yang semakin tinggi. Kota Magelang merupakan salah satu kota yang perkembangannya tergolong pesat di wilayah Provinsi Jawa Tengah. Hal ini dapat dilihat dari pembangunan serta pertumbuhan ekonomi yang dicapai oleh kota ini. Penelitian ini bertujuan untuk mengetahui kondisi terkini mengenai kualitas air tanah di wilayah kota magelang akibat pembuangan limbah domestik dan industri dengan menganalisis parameter fisika (Suhu), parameter kimia (pH, Nitrat, BOD, COD, dan TSS), dan parameter biologi (Total Coliform). Penetapan lokasi penelitian guna pengambilan sampling air dilakukan menggunakan metode purposive sampling. Analisa parameter kualitas air dapat dilakukan secara in situ dan ex-situ serta nantinya akan di bandingkan dengan baku mutu air PP No.82 tahun 2001 dan Permenkes No. 32 tahun 2017. Hasil penelitian menunjukkan bahwa untuk parameter fisika masih dalam kondisi yang baik dengan nilai suhu rata-rata 26,1°C, sedangkan untuk nilai TSS (Total Suspended Solid) dan TDS (Total Dissolved Solid) 3,7 mg/L dan 227,95 mg/L. sedangkan untuk parameter kimia pH menunjukkan nilai yang cukup fluktuatif dan pada beberapa stasiun air tanah bersifat asam dengan nilai dibawah 7. Nilai nitrat pada stasiun penelitian 1,6,7 dan 9 memiliki nilai melebihi ambang batas yang ditetapkan yaitu 10 mg/L. Kemudian untuk nilai BOD (Biological Oxygen Demand) memiliki nilai lebih dari 2 mg/L sebagai syarat masuk kelas 1 mutu air tanah yang aman untuk higine, COD (Chemical Oxygen Demand) mempunyai nilai yang melebihi syarat maksimal yaitu 10 mg/L di semua stasiun penelitian, oleh sebab itu dikatagorikan sebagai pencemaran berat. Nilai total coliform yang melebihi baku mutu air untuk keperluan higiene sanitasi menurut Permenkes No. 32 tahun 2017 sebesar 50 MPN/100ml.kualitas air tanah Kota Magelang dapat dimanfaatkan untuk keperluan air minum dengan catatan penggunannya harus melalui proses pemasakan terlebih dahulu.

scholarly journals Mapping Chlorophyll-a Concentrations in the Kaštela Bay and Brač Channel Using Ridge Regression and Sentinel-2 Satellite Images

Electronics ◽  
2021 ◽  
Vol 10 (23) ◽  
pp. 3004
Author(s):  
Antonia Ivanda ◽  
Ljiljana Šerić ◽  
Marin Bugarić ◽  
Maja Braović
Keyword(s):  
Remote Sensing ◽  
Chlorophyll A ◽  
Satellite Data ◽  
Coastal Waters ◽  
Optical Parameter ◽  
Data Set ◽  
Chl A ◽  
Sentinel 2

In this paper, we describe a method for the prediction of concentration of chlorophyll-a (Chl-a) from satellite data in the coastal waters of Kaštela Bay and the Brač Channel (our case study areas) in the Republic of Croatia. Chl-a is one of the parameters that indicates water quality and that can be measured by in situ measurements or approximated as an optical parameter with remote sensing. Remote sensing products for monitoring Chl-a are mostly based on the ocean and open sea monitoring and are not accurate for coastal waters. In this paper, we propose a method for remote sensing monitoring that is locally tailored to suit the focused area. This method is based on a data set constructed by merging Sentinel 2 Level-2A satellite data with in situ Chl-a measurements. We augmented the data set horizontally by transforming the original feature set, and vertically by adding synthesized zero measurements for locations without Chl-a. By transforming features, we were able to achieve a sophisticated model that predicts Chl-a from combinations of features representing transformed bands. Multiple Linear Regression equation was derived to calculate Chl-a concentration and evaluated quantitatively and qualitatively. Quantitative evaluation resulted in R2 scores 0.685 and 0.659 for train and test part of data set, respectively. A map of Chl-a of the case study area was generated with our model for the dates of the known incidents of algae blooms. The results that we obtained are discussed in this paper.

scholarly journals Pengaruh Padatan Tersuspensi terhadap Konsentrasi Klorofil-a dan Fosfat Inorganik Terlarut di Muara Banjir Kanal Barat, Semarang

2021 ◽  
Vol 24 (2) ◽  
pp. 223-231
Author(s):  
Jarot Marwoto ◽  
Oceana Windyartanti ◽  
Muslim Muslim
Keyword(s):  
Chlorophyll A ◽  
Inorganic Phosphate ◽  
River Mouth ◽  
Principal Component ◽  
Total Suspended Solid ◽  
Suspended Solid ◽  
High Concentration ◽  
The West ◽  
Inorganic Particles

The large number of activities along the West Banjir Kanal river has triggered a change in the condition of its sea waters. The condition most affected is turbidity which caused high concentration of Total Suspended Solid (TSS) in estuary waters and interfere with the entry of sunlight into the waters. The purpose of the study is to determine the effect of the of concentration TSS on the concentration chlorophyll a and dissolved inorganic phosphate (DIP) in the waters of West Banjir Kanal estuary. Water sampling was conducted on October 3, 2019. Water quality parameters such as brightness, pH, temperature, DO and salinity were measured in situ. Meanwhile, chlorophyll a, TSS and DIP measurements were analyzed in the laboratory. The results showed that the highest concentration of TSS, chlorophyll a and DIP were in the estuary area and decreased with further distance from the river mouth with concentration were 70.17-151.50 mg/L, 0.03–2.67 µg/L and 0.71–0.98 µM respectively. Based on the results of the Principal Component Analysis (PCA) showed that TSS affected chlorophyll a by 8.7% (r=0.392; p<0.05) and DIP by 54.46% (r=0.931; p<0.01). The low regression between TSS and chlorophyll a was due to the presence of large amounts of inorganic particles in the West Banjir Kanal river, which makes the river waters become turbid. So, the turbidity of the waters caused the release of phosphate in the sediment to water column which was used by phytoplankton for photosynthesis, so the TSS not only contain sediment particles, but also phytoplankton. Banyaknya aktivitas di sepanjang sungai Banjir Kanal Barat Semarang, memicu kondisi perairan lautnya menjadi berubah.  Kondisi yang paling terpengaruh adalah kekeruhan yang menyebabkan tingginya konsentrasi Material Padatan Tersuspensi (MPT) di perairan muara dan mengganggu masuknya cahaya matahari ke perairan. Penelitian ini bertujuan untuk mengetahui pengaruh MPT terhadap konsentrasi klorofil-a dan fosfat inorganik terlarut (DIP=Dissolved Inorganic Phosphate) di perairan Muara Banjir Kanal Barat Semarang. Pengambilan sampel air dilakukan pada tanggal 3 Oktober 2019. Parameter kualitas perairan seperti kecerahan, pH, suhu, DO dan salinitas diukur secara in situ. Sedangkan pengukuran klorofil-a, MPT dan DIP dianalisis di laboratorium. Hasil penelitian menunjukkan bahwa konsentrasi MPT, klorofil-a dan DIP tertinggi di daerah muara sungai dan menurun dengan makin jauhnya muara sungai dengan konsentrasi secara berturut-turut sebesar 70,17-151,50 mg/L, 0,03-2,67 µg/L dan 0,71-0,98 µM. Berdasarkan hasil Analisis Komponen Utama (AKU) menunjukkan bahwa MPT mempengaruhi klorofil-a sebesar 8,7% (r = 0,392; P < 0,05) dan fosfat inorganik terlarut sebesar 54,46% (r = 0,931; P < 0,01). Rendahnya hubungan antara MPT dengan klorofil-a ini disebabkan oleh adanya masukan partikel anorganik dalam jumlah besar di badan Sungai Banjir Kanal Barat yang membuat perairan sungai menjadi keruh. Jadi kekeruhan perairan menyebabkan terlepasnya fosfat di sedimen yang dimanfaatkan oleh fitoplankton untuk proses fotosintesa, sehingga yang terkandung dalam MPT selain partikel sedimen juga fitoplankton.

scholarly journals Methodological priorities in assessing wild edible plant knowledge and use – a case study among the Baka in Cameroon

2020 ◽  
Author(s):  
Sandrine Gallois ◽  
Thomas Heger ◽  
Amanda G. Henry ◽  
Tinde van Andel
Keyword(s):  
Ex Situ ◽  
Wild Edible Plant ◽  
Edible Plant ◽  
Single Population ◽  
Plant Knowledge ◽  
Starting Point ◽  
Consumption Frequency ◽  
Short Time

AbstractFreelisting and dietary recalls are frequently used methods in ethnobotany to assess wild edible plant (WEP) knowledge and use. Though these ex-situ interviewing methods are practical to perform and may yield large datasets in a short time, they are known to be limited by the informant’s memory and cognitive bias. Alternatively, the much more laborious walk-in-the-woods method may be used, in which informants point out edible plants in-situ. Few studies, however, examine quantitatively how these different methods influence results. In this study, we assessed how these methods capture the diversity of wild edible plant knowledge and use among the Baka, a group of forager-horticulturalists from southeastern Cameroon. We show that within a single population, and when data on consumption frequency are collected simultaneously, the walk-in-the-woods method results in more detailed information of WEP knowledge and use than do freelisting or dietary recalls. Our in-situ method yielded 91 species of WEP, much more than the ex-situ methods of freelisting (34 spp.) and dietary recalls (12 spp.). Our results imply that previous studies based only on ex situ surveys may have underestimated the importance of WEP for local communities. We propose that future studies on WEP knowledge and use frequency should rely on mixed methods, taking an in-situ method as the starting point of their approach.

scholarly journals XRD-Thermal Combined Analyses: An Approach to Evaluate the Potential of Phytoremediation, Phytomining, and Biochar Production

2019 ◽  
Vol 16 (11) ◽  
pp. 1976 ◽  
Author(s):  
Dario Fancello ◽  
Jessica Scalco ◽  
Daniela Medas ◽  
Elisa Rodeghero ◽  
Annalisa Martucci ◽  
...  
Keyword(s):  
Thermal Analyses ◽  
Xrd Analysis ◽  
Ex Situ ◽  
X Ray Diffraction ◽  
Juncus Acutus ◽  
Polluted Sites ◽  
Synchrotron Light ◽  
In Situ Heating

A method for evaluating the potential of reuse of biomasses for economic purposes is here presented starting from a case study. Juncus acutus plants and rhizospheres were harvested from abandoned Zn–Pb mine areas of southwest Sardinia (Italy). Thermogravimetry and Differential Thermal analyses were performed to evaluate the temperatures at which significant reactions occur. X-ray Diffraction (XRD) analysis was carried out on raw samples and on samples heated ex-situ (by a conventional diffractometer) or in-situ (by synchrotron-based diffraction). Raw samples mainly consist of quartz, phyllosilicates, and feldspars with minor amounts of sulfides, sulfates, and Fe, Pb, and Zn carbonates, concentrated in the rhizosphere. After heating, Zn and Fe oxides and willemite are observed in internal roots and stems, revealing the presence of these metals in the plant tissues. In-situ heating was less effective than ex-situ in revealing minor phases in organic samples, probably because the scarcity of oxygen within the sample holder did not allow the degradation of organic compounds and the oxidation of sulfides, resulting in a low quality XRD signal even if obtained with the high resolution ensured by a synchrotron light source. This method can be applied to plants from polluted sites for metal exploitation, and/or to biomasses from unpolluted sites for biochar production, since both applications take advantage of the knowledge of the minerals formed after heating.

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