scholarly journals Diversity of Macrophytes and Environmental Assessment of the Ljubljanica River (Slovenia)

Diversity ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 278
Author(s):  
Mateja Germ ◽  
Vanja Janež ◽  
Alenka Gaberščik ◽  
Igor Zelnik
Keyword(s):  
Alien Species ◽  
Invasive Alien Species ◽  
Myriophyllum Spicatum ◽  
Environmental Parameters ◽  
Elodea Canadensis ◽  
Frequency Of Occurrence ◽  
Chemical Parameters ◽  
Data Set ◽  
Physical And Chemical Parameters ◽  
Physical And Chemical

The present research aimed to determine the diversity of macrophyte taxa in the Ljubljanica River and its relationship with environmental parameters. In each of the 19 river sections, the presence and abundance of plant taxa were recorded, and basic physical and chemical parameters were measured. Additionally, selected environmental parameters were assessed using a modified version of the Riparian, Channel and Environmental (RCE) method. We compared the obtained data set with survey data from the year 2004. In 2019, a total of 34 macrophyte taxa were recorded. The dominant taxa with the highest abundance were Sparganium emersum, Callitriche sp., and the invasive alien species Elodea canadensis. The species richness and diversity of macrophytes decreased with distance from the source, an increase in pH, and alterations of the riverbed structure due to interference in the riverine ecosystem in the lower part of the Ljubljanica River and its catchment. The comparison of 2004 and 2019 surveys revealed a decrease in the overall presence and abundance of P. natans and in the frequency of occurrence of the species Myriophyllum spicatum and an increase in the presence and abundance of the invasive alien species Elodea canadensis.

scholarly journals Co-existence of Epiphytes on Eucheuma Denticulatum (Rhodophyceae) in Varying Depths Cultivated with Verti Net Method

2021 ◽  
Vol 934 (1) ◽  
pp. 012008
Author(s):  
N Wati ◽  
M Kasim ◽  
S Salwiyah
Keyword(s):  
Dissolved Oxygen ◽  
Current Velocity ◽  
Environmental Parameters ◽  
Chemical Parameters ◽  
Eucheuma Denticulatum ◽  
Significant Negative Effect ◽  
Physical And Chemical Parameters ◽  
Negative Effect ◽  
Net Method ◽  
Physical And Chemical

Abstract The existence of macroepiphytes is one of the issues seaweed farmers often face. This research aimed to explore the co-existence of macroepiphytes with seaweed Eucheuma denticulatum at varying depths using verti net method. Results showed that the highest and the lowest density of macroepiphyte were obtained on day -10 in the depth of 50 cm and 200 cm at 248,4 and 121,28 ind/m2/day, respectively. On day-20, in the depth of 100 cm and 200 cm the densities were 333,54 and 270,01 ind/m2/day, respectively. The most dominant macroepiphyte y is Chatomorpha crasa. Physical and chemical parameters showed a temperature of 29°-30°C, current velocity of 0,050-0,067 m/sec, brightness 92%, salinity 30-33‰, nitrate 0,237-0,0416 mg/L, phosphate 0,0015-0,0036 mg/L and dissolved oxygen 5,7-6,2 mg/L. The obtained optimum environmental parameters and the type of the macroepiphytes did not show any significant negative effect on the growth of E. denticulatum.

The influence of gelatin and starter culture on the physical and chemical parameters of cheeses with different fat content

2018 ◽  
Vol 6 (10) ◽  
pp. 123-130
Author(s):  
Yaroslava Zhukova ◽  
◽  
Pylyp Petrov ◽  
Olena Boloba ◽  
Tetiana Ohrimenko ◽  
...  
Keyword(s):  
Starter Culture ◽  
Fat Content ◽  
Chemical Parameters ◽  
Physical And Chemical Parameters ◽  
Physical And Chemical

scholarly journals Analisis Kesesuaian Perairan untuk Keramba Jaring Apung di Kecamatan Sirah Pulau Padang Kabupaten Ogan Komering Ilir Provinsi Sumatera Selatan

2019 ◽  
Vol 8 (1) ◽  
pp. 20-30
Author(s):  
Rangga Bayu Kusuma Haris ◽  
Indah Anggraini Yusanti
Keyword(s):  
Water Quality ◽  
Current Velocity ◽  
Quality Parameters ◽  
Chemical Parameters ◽  
Chemical Laboratory ◽  
M Current ◽  
Bottom Substrate ◽  
A Value ◽  
Physical And Chemical Parameters ◽  
Physical And Chemical

Haris et al, 2019. The Analysis of Water Suitability for Floating Net Sprouts in Sirah Pulau Padang, Ogan Komering Ilir District, South Sumatra Province. JLSO 8(1):20-30.The purpose of this study is to analyze the level of water suitability of the floating net sprouts in sirah pulau padang, ogan komering river, Serdang Menang Village, OKI South Sumatra Regency based on water physical and chemical parameters. This study was conducted on July - August 2018 at the Komering River, Ulak Jermun village, Terusan Menang Village, and Mangun Jaya Village, OKI District, South Sumatra. The data of sampling was divided into 3 stations, they were; station 1 was Ulak Jermun Village (3 ° 18'45.48 "LS and 104 ° 53'5.32" BT), station 2 was Terusan Menang Village (3 ° 17'14.13 "LS and 104 ° 52'46.78 "BT), and station 3 was Mangun Jaya village (3 ° 18'14.92" LS and 104 ° 52'59.48 "BT). The data of Samples were tested at the chemical laboratory in Palembang Public Water Fisheries and Extension Research Institute directly. The results of the study was for Station 1, Station 2, and Station 3 with a value was  48% with a good feasibility information. The results of measurements of water quality parameters, the pH was about 6.6 - 6.7, temperature was about from 24., 53 - 26.93oC, DO 3.93 - 4.36 mg / l, ammonia was about 0.78 - 0.16 mg / l, water brightness was about from 34.67 - 43.33 cm, CO2 4.53 - 5.03 mg / l, depth 2.36 - 2.47 m, current velocity was about 0.38 - 0.44 m / s, nitrate was about 0.37 - 0.439 mg / l, phosphate was about 0.009 - 0.225 mg / l and the bottom substrate of water was mud.

scholarly journals The first report of ants (Formicidae: Hymenoptera) in salt marshes and salt pans in central parts of Iran

2019 ◽  
Vol 20 (9) ◽  
Author(s):  
MOHAMMAD REZA MOHSENI ◽  
SHAHROKH PASHAEI RAD
Keyword(s):  
Salt Marshes ◽  
Dominant Species ◽  
Salt Lake ◽  
Vegetation Density ◽  
Chemical Parameters ◽  
Salt Pans ◽  
Mountain Station ◽  
Physical And Chemical Parameters ◽  
Physical And Chemical ◽  
First Time

The present study was conducted in Salt marshes and Salt pans in central parts of Iran. 121 specimens of ants were collected by trapping and hand during spring, summer and autumn 2017 to 2019. Nine species belong to two subfamilies of Myrmicinae and Formicinae were identified. The vegetation, physical and chemical parameters of soil such as salinity, Ph, and other factors were investigated. Darband Shoor Mountain station with five species had the highest diversity and vegetation density and the lowest salinity of soil (72.14 ds/m) whereas Salt Lake station had only one species, with no vegetation and the highest salinity of soil (153.15 ds/m). Cataglyphis lividus (André, 1881) was the dominant species in all the stations except in Darband Shoor Mountain station. All the species were reported for the first time from salt marshes and salt pans in the central parts of Iran and were approved by Prof. Brian Taylor, in Royal Entomological Society of London, England.

scholarly journals Bioecology of Manggabai Fish (Glossogobius giuris) in Limboto Lake

2020 ◽  
Vol 4 (2) ◽  
pp. 89
Author(s):  
Dewi Nuryanti Fazrin ◽  
Hasim Hasim ◽  
Juliana Juliana
Keyword(s):  
Fishing Gear ◽  
Residential Areas ◽  
Chemical Parameters ◽  
Fish Traps ◽  
Physical And Chemical Parameters ◽  
Glossogobius Giuris ◽  
Net Cages ◽  
Physical And Chemical ◽  
Traditional Fishing ◽  
The Relationship

The purpose of this study was to determine the relationship between the length and weight of Manggabai fish (Glossogobius giuris) and to know the relationship between the presence of Manggabai fish (Glossogobius giuris) and water quality in Limboto Lake. This research was conducted in February 2019, located in the waters of Lake Limboto, Gorontalo Province. The method used in determining the location of sampling is Purposive Sampling. Fish sampling is determined by considering fishing locations, litoral areas, the presence of residential areas, agricultural and plantation areas, the existence of floating net cages and in the middle of the lake. The study was conducted at 20 observation stations using fish traps in the form of bamboo and used motorcycle tires that have been modified and become traditional fishing gear. The results showed that the physical and chemical parameters in Lake Limboto and showed temperature values ​​ranged from 29.77 to 31.630C, dissolved oxygen levels ranged from 2.1 to 5.48 ppm, pH ranged from 7.09 to 8.94, TDS ranging from 0.251 to 0.369, Nitrite Levels 0.04-0.08 ppm, Nitrate Levels 1.2-4.7 ppm, BOD ranges from 2.5-57 ppm and phosphate levels 0.1-1.14 ppm. The relationship between length and body weight of fish are allometric, where W = 0.8769 L10,023 and constant b (10,023)> 3.

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