scholarly journals Morphometric study of seagrass Thalassia hemprichii in the coastal area of the Bahoi Village, West Likupang Sub-distritct, North Minahasa District

2020 ◽  
Vol 10 (3) ◽  
pp. 102
Author(s):  
Yuneke Kansil ◽  
Khristin I.F. Kondoy ◽  
Joudy R.R. Sangari ◽  
Alex D. Kambey ◽  
Adnan S. Wantasen ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Coastal Area ◽  
Environmental Parameters ◽  
Survey Method ◽  
Morphometric Study ◽  
Thalassia Hemprichii ◽  
Significant Difference ◽  
Safe Limits ◽  
Digital Caliper ◽  
One Way Anova

The purposes of the morphometrics of seagrass Thalassia hemprichii study (based on samples taken from the coast of Bahoi Village, Likupang Barat Sub-district, North MInahasa District) were as follow: (1) to know the environmental conditions (temperature, salinity, pH, substrate) on the coastal area of Bahoi Village, (2) to describe the morphometrics of seagrass T. hemprichii,  and (3) to compare the morphometric of seagrass Thalassia hemprichii based on sampling stations. Data were collected using a survey method, to sample the seagrass T. hemprichii in three locations. As many as 30 individuals at each study location, were then measured using a digital caliper. The results of the measurement analyzed statistically show that the value was not significantly different. There is no significant difference in the size of the seagrass growth due to environmental conditions or environmental parameters that exist at these 3 stations and supposedly are still within the safe limits for seagrass growth. This evidence was gained based on the results of the ANOVA test (one way ANOVA) which was not significantly different.Keyword : Morphometrics; Thalassia hemprichii; Seagrass; Bahoi Village; Coast ABSTRAKTujuan Penelitian ini adalah mengetahui morfometrik Lamun Thalassia hemprichii berdasarkan sampel yang diambil di Pesisir Pantai Desa Bahoi Kecamatan Likupang Barat. yaitu : (1) Mengetahui kondisi lingkungan perairan lamun (suhu, salinitas, pH, substrat) di Pesisir Pantai Desa Bahoi, (2) Mendeskripsikan morfometrik dari lamun Thalassia hemprichii, (3) Membandingkan morfometrik lamun Thalassia hemprichii berdasarkan stasiun pengambilan sampel. Pengambilan data dilakukan dengan menggunakaan metode survei jelajah, dengan menggunakan Global Positioning System (GPS) dan dilanjutkan dengan pengambilan sampel Lamun Thalassia hemprichii sebanyak 30 individu pada setiap lokasi penelitian,   kemudian  diukur dengan menggunakan caliper digital. Hasil yang analisis diperoleh berdasarkan nilai statistik Thalassia hemprichii di Pesisr Pantai Desa Bahoi adalah tidak berbeda nyata. Tidak adanya perbedaan yang nyata dari ukuran pertumbuhan  lamun tersebut  disebabkan oleh kondisi lingkungan atau parameter lingkungan yang ada  pada ke 3 stasiun ini masih dalam batas yang aman bagi pertumbuhan Lamun. Dibuktikan dengan Hasil uji ANOVA satu jalur (one way ANOVA) diperoleh tidak berbeda nyata.Kata kunci : Morfometrik; Thalassia hemprichii; Lamun; Desa Bahoi; Pesisir

scholarly journals MORFOMETRIK LAMUN Thalassia hemprichii BERDASARKAN TIPE SUBSTRAT DI PERAIRAN PANTAI TANJUNG TIRAM, POKA, TELUK AMBON DALAM

2021 ◽  
Vol 17 (2) ◽  
pp. 77-89
Author(s):  
Jessico H Sermatang ◽  
Charlotha I Tupan ◽  
Laura Siahainenia
Keyword(s):  
Environmental Conditions ◽  
Sampling Method ◽  
Environmental Parameters ◽  
Nutrient Content ◽  
Flowering Plant ◽  
Substrate Type ◽  
Thalassia Hemprichii ◽  
Purposive Sampling ◽  
Significant Difference ◽  
Parameters Analysis

Seagrass as a flowering plant can live from muddy substrates to coral fractures. Differences in the characteristics of substrate type, nutrient content and aquatic environmental conditions can affect morphometric seagrass. The purpose of the study was to analyze environmental conditions and nutrient content as well as the morphometric characteristics of T. hemprichii seagrass based on differences in substrate type. This study was conducted in the waters of Tanjung Tiram Coastal, Poka from February-April 2021. Seagrass sampling was using the purposive sampling method. Data analysis was conducted using ANOVA with SPSS. The results of environmental parameters analysis showed that the water conditions of Tanjung Tiram, Poka are still at the tolerance limit intended for seagrass life. The substrate consists of sand substrate, gravel mixed sand substrate and mud substrate. The results of ANOVA showed that there was a significant difference in the content of sedimentary nutrients, especially phosphates in each substrate type and there was a significant difference in morphometric seagrass based on differences in substrate type and nutrient content.   ABSTRAK Lamun sebagai tumbuhan berbunga dapat hidup mulai dari substrat berlumpur sampai dengan patahan karang. Perbedaan karakteristik jenis substrat, kandungan nutrien dan kondisi lingkungan perairan dapat mempengaruhi morfometrik lamun. Tujuan dari penelitian ini adalah menganalisis kondisi lingkungan dan kandungan nutrien serta karakteristik morfometrik lamun T. hemprichii berdasarkan perbedaan tipe substrat. Penelitian ini dilaksanakan di Perairan Pantai Tanjung Tiram, Poka pada Bulan Februari-April 2021. Pengambilan sampel lamun menggunakan metode purposive sampling. Analisis data menggunakan ANOVA dengan SPSS. Hasil analisis parameter lingkungan, menunjukan bahwa kondisi perairan Tanjung Tiram, Poka masih berada pada batas toleransi yang diperuntukan untuk kehidupan lamun. Substrat terdiri dari substrat pasir, pasir campur kerikil dan lumpur. Hasil anova menunjukan bahwa terdapat perbedaan kandungan nutrien sedimen khususnya fosfat secara signifikan pada masing masing tipe substrat dan terdapat perbedaan morfometrik lamun secara signifikan berdasarkan perbedaan tipe substrat dan kandungan nutrien. Kata Kunci: morfometrik, nutrien, substrat, Tanjung Tiram, Thalassia hemprichii

scholarly journals Morphometric Studies of Seagrass Halophila ovalis (R.Brown) Hooker in Kahona, Lembeh Sub-district of Bitung City and in the Tasik Ria, Tombariri Sub-district , Minahasa District

2018 ◽  
Vol 7 (1) ◽  
pp. 19
Author(s):  
Mizhael A.P. Wulur ◽  
Khrsitin I. F. Kondoy ◽  
Jety K. Rangan
Keyword(s):  
Marine Protected Area ◽  
Sea Water ◽  
Leaf Shape ◽  
Environmental Parameters ◽  
Survey Method ◽  
Halophila Ovalis ◽  
Seagrass Ecosystem ◽  
Significant Difference ◽  
Coral Reef Ecosystems ◽  
Safe Limits

Seagrass is a marine plant that has roots with a rhizom system, the structure of the stem and leaves can be clearly distinguished. Halophila ovalis belongs to the Hydrocharitaceae family and common characteristics of this family include two branched leaves, oval leaf shape, small stalks and rhizomes that are easily broken and smooth, single-haired roots. This research was carried out in the coastal waters of Kahona Beach, South Lembeh Sub-district, Bitung City, and in Tasik Ria Beach, Tombariri Sub-district, Minahasa Regency. To date, there is no information regarding the comparison of morphometric of seagrass Halophila ovalis in both locations. The research objective was to compare the morphometric size of Halophila ovalis based on both research locations (Kahona Beach and Tasik Ria Beach). Data collection was conducted using survey method. As many as 30 plants in each study location were collected, washed with sea water and put into plastic samples which would then be measured using a digital caliper.In the results obtained, statistically, the Halophila ovalis species on Kahona Beach and Tasik Ria Beach are the same. There is no significant difference with regard to the size of the growth. This is due to the condition of the existing environmental parameters. Environmental parameter conditions in these two locations are still within the safe limits of seagrasses to grow optimally. From the measurement results, it can be seen that the size of seagrass growth in Tasik Ria Beach is smaller than that on Kahona Beach. This is due to the activities of people who come touring that accidentally damage seagrasses and damaged coral reef ecosystems are unable to withstand the strong currents and trash carried. Whereas in Kahona Beach, this is a marine protected area that is still rare for tourists to visit even though it has become an ecotourism area so that the conditions are still good and maintained, not only the seagrass ecosystem but also mangrove ecosystems and coral reefs.Keywords: Morfometrics, Halophila ovalis, Kahona Beach, Tasik Ria Beach ABSTRAK Lamun adalah tumbuhan air yang memiliki akar dengan sistem perakaran rhizoma, struktur batang dan daun yang dapat dibedakan dengan jelas. Halophila ovalis termasuk dalam famili Hydrocharitaceae. Ciri-ciri umum dari famili ini antara lain daun bercabang dua, bentuk daun oval, memiliki tangkai yang kecil dan rhizome yang mudah patah serta akar tunggal yang berambut halus. Penelitian ini dilaksanakan di perairan Pantai Kahona Kecamatan Lembeh Selatan Kota Bitung dan di perairan Pantai Tasik Ria Kecamatan Tombariri Kabupaten Minahasa. Sampai saat ini, belum ada informasi mengenai perbandingan morfometrik lamun Halophila ovalis di kedua lokasi yang tersedia. Adapun yang menjadi tujuan penelitian yaitu membandingkan ukuran morfometrik Halophila ovalis berdasarkan lokasi penelititan (Pantai Kahona dan Pantai Tasik Ria). Pengambilan data dilakukan dengan menggunakan metode survei jelajah, sebanyak 30 pada setiap lokasi penelitian, dicuci dengan air laut dan dimasukan kedalam plastik sampel yang kemudian akan diukur dengan menggunakan caliper digital. Pada hasil yang diperoleh, secara statistik spesies Halophila ovalis di Pantai Kahona dan di Pantai Tasik Ria adalah sama. Tidak ada perbedaan yang nyata berkaitan dengan ukuran pertumbuhan tersebut. Hal ini disebabkan oleh kondisi parameter lingkungan yang ada. Kondisi parameter lingkungan pada kedua lokasi ini masih dalam batas yang aman bagi lamun untuk bertumbuh kembang secara optimal. Dari hasil pengukuran terlihat bahwa ukuran pertumbuhan lamun yang ada di Pantai Tasik Ria lebih kecil dari pada yang ada di Pantai Kahona. Hal ini disebabkan aktivitas masyarakat yang datang berwisata yang tidak sengaja merusak lamun serta ekosistem terumbu karang yang sudah rusak tidak mampu menahan kuatnya arus dan sampah yang terbawa. Sedangkan di Pantai Kahona ini merupakan daerah perlindungan laut yang masih jarang wisatawan walaupun sudah menjadi daerah ekowisata sehingga kondisi di Pantai Kahona masih baik dan terjaga, bukan hanya ekosistem lamunnya tapi juga ekosistem mangrove dan terumbu karang.Kata Kunci : Morfometrik, Halophila ovalis, Pantai Kahona, Pantai Tasik Ria

scholarly journals SIMPANAN KARBON PADANG LAMUN DI KAWASAN PANTAI SANUR, KOTA DENPASAR

2016 ◽  
Vol 10 (1) ◽  
pp. 46 ◽  
Author(s):  
Yoga Ibnu Graha ◽  
I Wayan Arthana ◽  
I Wayan Gede Astawa Karang
Keyword(s):  
Carbon Storage ◽  
Coastal Area ◽  
Carbon Stock ◽  
Environmental Parameters ◽  
Carbon Stocks ◽  
Thalassia Hemprichii ◽  
Bottom Substrate ◽  
Total Potential ◽  
Halophila Ovalis ◽  
Seagrass Biomass

Seagrass is one of the marine resources that considerably potential as a CO2 absorbent and functioned as carbon sinks in the oceans known as blue carbon. The result of carbon sequestration from the process of photosynthesis is stored as carbon stocks on seagrass tissue, or streamed to multiple compartments, such as sediment, herbivores and other ecosystems. This study aims to assess the potential for carbon stock storage in biomass on a tissue of seagrass in Sanur Beach coastal area. The observations of seagrass are included the seagrass type, seagrass stands, and measurement of environmental parameters. Then the sampling was conducted to obtain the value of seagrass biomass. The carbon stocks obtained through the conversion of biomass by using carbon concentration analysis of seagrass tissue and then carried a spatial distribution of carbon stocks. Types of seagrass found in Sanur Beach coastal area consist of eight species that are Enhalus acroides, Thalassia hemprichii, Halophila ovalis, Syringodium isoetifolium, Cymodocea serrulata, Cymodocea rotundata, Halodule uninervis and Halodule pinifolia. The result of the carbon stock seagrass in the bottom substrate is 60% greater than the carbon stock in the top substrate which is 40%. Seagrass covering 322 ha of Sanur Beach coastal area with a total potential carbon storage of 66.60 tons or 0.21 tons / ha. Seagrass key role as a carbon storage is on the bottom substrate tissue, and Enhalus acroides is a seagrass species that contributes the most to the carbon storage.

Grading Practices as Push and Pull Factors in Tertiary Learning in the Implementation of Outcomes-Based Education

2015 ◽  
Vol 13 (1) ◽  
Author(s):  
Warren A. Ramos
Keyword(s):  
Learning Outcomes ◽  
T Test ◽  
Survey Method ◽  
Grading Practices ◽  
College Instructors ◽  
Documentary Analysis ◽  
Significant Difference ◽  
Descriptive Survey ◽  
Outcomes Based Education ◽  
One Way Anova

Grading practices have long been a controversial issue in the academe. There is an urgency to revisit the grading practices of college instructors in the changing landscape of educational policies. This study aimed to identify and differentiate the grading practices that promote and inhibit learning in the outcomes-based education (OBE) among college instructors in English 1 using descriptive survey method design, interview, and documentary analysis. The statistical methods used were weighted mean, one way ANOVA and t-test. The result of the study discussed that the majority of the respondents are in 31-36 years of age, female, married, having Masters Degree and with four to six years experience in teaching. The highest promoter of learning to grading practices as perceived by teachers was grading based on the stated learning outcomes. The identified inhibitor of learning practices was giving of deductions in the student’s grades based on behavior. Results also show that the grading practices of instructors have no significant difference when grouped according to their profile. The findings of the study were used as an input towards the formulation of proposed guidelines to improve the grading practices in the implementation of OBE.   Keywords - Grading Practices, Descriptive –Survey, Outcomes-based Education, One-way ANOVA, t-test of independence, Intended learning outcomes, Philippines

scholarly journals Are the posterior bracket placement patterns reliable?

2016 ◽  
Vol 31 (1) ◽  
pp. 16
Author(s):  
Fabiano Dalla Lana Mattielo ◽  
Marcelo Bichat Pinto De Arruda ◽  
Natália Lima Xavier ◽  
Thaís Gelatti Bortoly
Keyword(s):  
Permanent Dentition ◽  
Posterior Teeth ◽  
Occlusal Wear ◽  
Significant Difference ◽  
Permanent Molars ◽  
Vertical Positioning ◽  
Digital Caliper ◽  
Bracket Positioning ◽  
One Way Anova ◽  
First Permanent Molars

Objective: Investigate the marginal ridges leveling accuracy of Alexander and Viazis bracket placement methods.Methods: Eighty pairs of dental casts were selected, with complete permanent dentition, without occlusal wear or restorations. A linking line between mesial and distal ridges of posterior teeth was done to measure the occlusal thirds with digital caliper. The means, obtained from 3 different examiners, were compared with the values of Alexander and Viazis’ equations through One-way ANOVA with α=0.05.Results: The second premolar placement value (x) suggested by the authors showed no difference in comparison to the occlusal third size of the sample teeth (p>0.05), however for the first premolars, a significant difference was found (p<0.001). The value adopted for positioning on the first permanent molars (x-0.5mm) is consistent with the size of the occlusal third of these teeth (p=0.0531). A significant difference was also found for the second permanent molars bracket positioning between the predefined value (x-1mm) and the sample (p<0.001).Conclusions: The vertical positioning values proposed by Alexander and Viazis for placement of second premolars and first permanent molars do contribute to the leveling of marginal ridges, which cannot be applied for the values recommended for the first premolars and second permanent molars.

scholarly journals Evaluation of Conditions during Weaned Pig Transport

2017 ◽  
Vol 33 (6) ◽  
pp. 901-912 ◽  
Author(s):  
Jay D. Harmon ◽  
Steven J. Hoff ◽  
Thomas J. Baas ◽  
Yang Zhao ◽  
Hongwei Xin ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Management Practices ◽  
Average Distance ◽  
Weather Condition ◽  
Stocking Density ◽  
Environmental Parameters ◽  
Cold Weather ◽  
Scale Model ◽  
Weaned Pigs ◽  
Significant Difference

Abstract.Transport of weaned pigs poses special challenges because of their size and thermal needs as well as the extended distances and transport times. The resultant economic impact can be substantial. Compared to transport of market pigs, weaned pigs generally encounter much farther travel distances with different adapting abilities to the environmental conditions. The objectives of this study were: 1) to characterize the environmental conditions within a typical transport trailer for weaned piglets to determine if current management practices and trailer design provides an acceptable environment as evidenced by mortality rates and environmental parameters, and 2) to analyze airflow patterns of the tranport trailer using a scale model in a wind tunnel. Data from 78 usable transport trips were collected for air temperature in each trailer compartment, ambient temperature,distance traveled, time traveled, stocking density, and mortality by compartment. The 78 trips had an average distance of 778 km (range of 264 to 1016 km), travel time of 8.51 h (range of 3.4 to 12.3 h), and mortality rate of 0.031% (range of 0 to 1.11%). There was no significant difference in mortality by compartment (p&gt;0.05). The results indicate that if pigs are transported at a higher stocking density, the compartment temperatures would be similar during cold weather (e.g., 2°C). Under mild weather condition (e.g., 16°C), significant differences could exist in compartment temperature between part of the upper deck (Upper 1) and the lower deck (Lower 4) (p&lt;0.05). In comparison, no significant differences were found at warm conditions (e.g., 29°C) (p&gt;0.05). In addition to the weather influence, in-trailer environment is affected by the side openings which may be adjusted by the driver. Keywords: Click here to enter keywords and key phrases, separated by commas, with a period at the end

scholarly journals Environmental and Geomorphological Effects on the Distribution of Deep-Sea Canyon and Seamount Communities in the Northwest Atlantic

2021 ◽  
Vol 8 ◽  
Author(s):  
Kristen Mello-Rafter ◽  
Derek Sowers ◽  
Mashkoor Malik ◽  
Les Watling ◽  
Larry A. Mayer ◽  
...  
Keyword(s):  
Climate Change ◽  
Species Composition ◽  
New England ◽  
Environmental Conditions ◽  
Deep Sea ◽  
Sea Urchins ◽  
Environmental Parameters ◽  
Anthropogenic Pressures ◽  
Northwest Atlantic ◽  
Significant Difference

Deep sea canyons and seamounts are topographically complex features that are considered to be biological hotspots. Anthropogenic pressures related to climate change and human activities are placing the species that inhabit these features at risk. Though studies have examined species composition on seamounts and canyons, few have compared communities between them, and even fewer studies have examined how species’ abundances correlate with environmental conditions or geomorphology. Consequently, this study compares species composition, community structure, and environmental variables between Northwest Atlantic continental margin canyons and seamounts along the New England Seamount Chain. Geoforms were also related to the occurrence of phyla and biodiversity. Overall, there was a significant difference in species composition between canyons and seamounts with sponges, corals, sea urchins and seastars contributing heavily to observed differences. Environmental conditions of temperature and salinity and the seafloor property slope contributed significantly to communities observed on seamounts, while substrate, depth and salinity contributed significantly to canyon communities. Abundances were significantly higher in canyons, but taxonomic richness, evenness, and diversity were all greater on seamounts. In an era where climate change and human activity have the potential to alter environmental parameters in the deep sea, it is important to examine factors that influence the spatial distribution of deep-sea benthic communities.

scholarly journals Are the posterior bracket placement patterns reliable?

2016 ◽  
Vol 31 (1) ◽  
pp. 16
Author(s):  
Fabiano Dalla Lana Mattielo ◽  
Marcelo Bichat Pinto De Arruda ◽  
Natália Lima Xavier ◽  
Thaís Gelatti Bortoly
Keyword(s):  
Permanent Dentition ◽  
Posterior Teeth ◽  
Occlusal Wear ◽  
Significant Difference ◽  
Permanent Molars ◽  
Vertical Positioning ◽  
Digital Caliper ◽  
Bracket Positioning ◽  
One Way Anova ◽  
First Permanent Molars

Objective: Investigate the marginal ridges leveling accuracy of Alexander and Viazis bracket placement methods.Methods: Eighty pairs of dental casts were selected, with complete permanent dentition, without occlusal wear or restorations. A linking line between mesial and distal ridges of posterior teeth was done to measure the occlusal thirds with digital caliper. The means, obtained from 3 different examiners, were compared with the values of Alexander and Viazis’ equations through One-way ANOVA with α=0.05.Results: The second premolar placement value (x) suggested by the authors showed no difference in comparison to the occlusal third size of the sample teeth (p>0.05), however for the first premolars, a significant difference was found (p<0.001). The value adopted for positioning on the first permanent molars (x-0.5mm) is consistent with the size of the occlusal third of these teeth (p=0.0531). A significant difference was also found for the second permanent molars bracket positioning between the predefined value (x-1mm) and the sample (p<0.001).Conclusions: The vertical positioning values proposed by Alexander and Viazis for placement of second premolars and first permanent molars do contribute to the leveling of marginal ridges, which cannot be applied for the values recommended for the first premolars and second permanent molars.

scholarly journals The psychological skill characteristics of Indonesian volleyball players reviewed based on gender and position

2019 ◽  
Vol 5 (2) ◽  
pp. 279
Author(s):  
Khoirul Anwar Pulungan ◽  
Dimyati Dimyati
Keyword(s):  
Data Analysis ◽  
Gender Difference ◽  
Research Design ◽  
Quantitative Research ◽  
Survey Method ◽  
Significance Level ◽  
Analysis Technique ◽  
Significant Difference ◽  
Volleyball Players ◽  
One Way Anova

This study aims to know: (1) the psychological skill characteristics of Indonesian volleyball players reviewed based on gender; (2) the psychological skill characteristics of Indonesian volleyball players reviewed based on position. The type of this study was descriptive quantitative research, using a survey method with a research design: a retrospective causal-comparative. The population in this study was Indonesian volleyball players attending the 18th Asian Games 2018 event in Indonesia numbering 28 Indonesian players, consisting of 14 male and 14 female players, with an average age of 25 years old for males and 20 years old for females. Meanwhile, the data analysis technique used parametric inferential statistics by using the independent t-test for gender difference and one-way Anova for position difference, with a significance level of 0.05. Results show that: (1) there is a significant difference in the psychological skill characteristics of Indonesian volleyball players reviewed based on gender, with the Sig. value 0.007 < 0.05; (2) there is no significant difference in the psychological skill characteristics of Indonesian volleyball players reviewed based on position, with the Sig. value 0.930 > 0.05.

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