scholarly journals Eksplorasi Lumut (Bryophyta) di Kawasan Air Terjun Bukit Gatan Provinsi Sumatera Selatan

2020 ◽  
Vol 3 (2) ◽  
pp. 93
Author(s):  
Febri Yulia Utami ◽  
Harmoko Harmoko ◽  
Linna Fitriani
Keyword(s):  
Light Intensity ◽  
Direct Observation ◽  
Abiotic Factors ◽  
Area Data

<p><em>This study aims to determine the type of moss in the Bukit Gatan Waterfall Region of Ulu Terawas STL Musi Rawas Regency, as well as Abiotic Factors in the Bukit Gatan Waterfall Area in the District of Ulu Terawas STL Musi Rawas District. This research is descriptive Descriptive: direct observation in the location of the Bukit Gatan Waterfall Area, STL Ulu Terawas Musi Rawas Regency with a roaming method or exploring the Waterfall Area. Data were analyzed descriptively qualitatively. Types of moss found in 2 Classes namely Bryopsida and Hepaticopsida, consisting of 5 Orders namely Pottiales, Bryales, Fissidentales, Hypnales, and Jungermaniales, consisting of 5 Families namely Pottiaceae, Batramiaceae, Fissidentaceae, Hypnaceae and Plagiochilaceae, consisting of 6 Genus Hyophila, Philotiphll, Philotropll , and Plagiochila, consisting of 7 species namely Hyophila javanica, Philonotis hastata, Fissidens atroviridis, Hyophila apiculata, Ectropothecium sp., Taxiphyllum sp., and Plagiochila asplenoides. The Abioic Factor is pH Temperature which is an average of 6.6, temperatures with an average of 27 ºC, humidity with an average of 6.3% and at an appropriate light intensity of 285lux.</em></p>

scholarly journals Eksplorasi Jenis Jamur Makroskopis di Kawasan Bukit Gatan Kabupaten Musi Rawas Provinsi Sumatera Selatan

2021 ◽  
Vol 5 (1) ◽  
pp. 21-28
Author(s):  
Larseh Putri Anggraini ◽  
Harmoko ◽  
Nopa Nopiyanti
Keyword(s):  
Light Intensity ◽  
Direct Observation ◽  
Pleurotus Ostreatus ◽  
Ganoderma Lucidum ◽  
Abiotic Factors ◽  
Schizophyllum Commune ◽  
Pleurotus Pulmonarius

This study aims to determine the types of macroscopic fungi in Bukit Gatan, Musi Rawas Regency, and Abiotic Factors found in Bukit Gatan, Musi Rawas Regency. This research is descriptive, direct observation at the location of Bukit Gatan, Musi Rawas Regency by using the method of exploring with one hiking trail. Data were analyzed descriptively qualitatively. The type of fungus in the hiking trail are 2 divisions namely Basidiomycota and Ascomycota. The Basidiomycota Division found 7 orders, 12 families, 15 genera and 19 species, namely Pleurotus ostreatus, Pleurotus pulmonarius, Leptiota brunneoincarnata, Marasmius candidus, Schizophyllum commune, Entoloma procerum, Ganoderma l, Ganoderma lucidum, Leptiota brunneoincarnata, Marasmius candidus, Schizophyllum commune, Entoloma procerum, Ganoderma l, Ganoderma lucidum, Leptiota brunneoincarnata, Marasmius candidus, Schizophyllum commune, Entoloma procerum, Ganoderma l, Ganoderma lucidum, Earliverus gustulus sacraicusus , Clitocybe salmonilamella, Phallus indusiatus, Coltricia cinamomea, and Coltricia perennis. Ascomycota Division produces 2 orders, 2 families, 3 genera and 3 species namely Cookeina sulcipes, Daldinia conentria, and Xylaria longipes. The abiotic factors are the temperature of 29-31 ° C, pH between 6-7, humidity of 30-70%, light intensity of 200 lux and height of 72-241 masl.

scholarly journals Distribusi Temporal dan Spatial Arthropoda Pada Berbagai Jenis Tumbuhan Liar di Agroekosistem

bionature ◽  
2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Muhammad Richsan Yamin ◽  
Siti Annisaa'ul Kariimah ◽  
Nadya Rizky Nuzul Ramadhanti ◽  
Intan Ayu Idha Wulandari
Keyword(s):  
Spatial Distribution ◽  
Data Collection ◽  
Light Intensity ◽  
Abiotic Factors ◽  
Biological Clock ◽  
Temporal Distribution ◽  
Wild Plant ◽  
Temporal And Spatial Distribution ◽  
Temperature And Humidity ◽  
Temporal And Spatial

Abstract. The purpose of this research were to (1) analyse the temporal and spatial distribution of arthropods in the cassava and eggplant agroecosystem areas. (2) Analysing the temporal and spatial distribution of arthropods in the maize agroecosystem. This research was divided into 2 stations,  the first station which is near the trail in the eggplant and corn agroecosystem, while for the second station on the corn agroecosystem, the two research locations are in Maccorawalie Village, Watang Sawitto District, Pinrang Regency, South Sulawesi. This research use the analytical method to analyse the observations and also identify the families of each arthropod found, then count the number of arthropods in each species and measure the diversity and abundance of each wild plant found at station 1 and station 2 in the morning and afternoon. The translation of the results obtained from the results of data collection at two stations in two data collection times (morning and afternoon) in the day, where the morning is 06.00-8.00 WITA Zone, while in the afternoon at 16.00-17.30 WITA zone. This is due to abiotic factors such as temperature and humidity, where the temperature in the morning is 23°C with 92% humidity, while the afternoon temperature is 25°C with 77% humidity. Arthropods have a different temporal distribution because this is related to the biological clock in each Arthropod. Biological clock allows Arthropods to determine when to work and rest. The existence of a rhythm in insects resulted in the division of two living groups, known as diurnal (active during the day) and nocturnal. Abiotic factors in the form of light intensity, temperature and humidity, affect the activity patterns of insects that have a certain temperature range, light intensity and humidity in Maccorawalie Village, Watang Sawitto District, Pinrang Regency.Keywords: temporal distribution, spatial distribution, arthropods, agroecosystem.

Influence of Light, Temperature, and Macronutrients on Growth and Scopolamine Biosynthesis in Duboisia species

Planta Medica ◽  
2017 ◽  
Vol 83 (11) ◽  
pp. 937-945 ◽  
Author(s):  
Sophie Ullrich ◽  
Andreas Rothauer ◽  
Hansjörg Hagels ◽  
Oliver Kayser
Keyword(s):  
Light Intensity ◽  
Biomass Production ◽  
Large Scale ◽  
Abiotic Factors ◽  
Negative Influence ◽  
Systematic Research ◽  
Wild Type ◽  
Minor Influence ◽  
A Minor ◽  
Active Substances

AbstractScopolamine is used in the pharmaceutical industry as a precursor in the organic synthesis of different classes of important active substances and is extracted in large scale from field grown Duboisia plants. Previous research revealed that plant growth as well as production of scopolamine and its derivatives varies strongly depending on abiotic factors. However, only a small amount of systematic research has been done on the influence of environmental conditions on scopolamine and biomass production, so far. In order to extend knowledge in this field, plants of three different genotypes (wild type Duboisia myoporoides and hybrids of D. myoporoides and Duboisia leichhardtii) were grown in climate chambers under controlled conditions in order to systematically analyse the influence of temperature (20, 24, 28 °C), light (50–300 µmol/m2 × s, 12, 18, 24 h per day) and macronutrients (nitrogen, calcium, potassium) on growth and scopolamine biosynthesis. The data indicate that light intensity and daily exposure to light have a major impact on scopolamine production and plant development, whereas temperature only shows a minor influence. Nitrogen (N) positively affects biomass production with increasing levels up to 4 mM, but is negatively correlated with scopolamine content. Calcium (Ca) shows a negative influence on scopolamine biosynthesis at increased levels above 1 mM as well. Potassium (K) neither affects biomass nor scopolamine production within the tested concentration range (0.05–4 mM). All in all, it can be concluded that light intensity and nitrogen supply are especially important regulating variables that can be applied in a targeted manner for influencing scopolamine and biomass production.

scholarly journals Accuracy of Intensity and Inclinometer Output of Three Activity Monitors for Identification of Sedentary Behavior and Light-Intensity Activity

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Lucas J. Carr ◽  
Matthew T. Mahar
Keyword(s):  
Physical Activity ◽  
Light Intensity ◽  
Sedentary Behavior ◽  
Direct Observation ◽  
Sedentary Behaviors ◽  
Percentage Agreement ◽  
Activity Monitors ◽  
Anatomical Position ◽  
Physical Activity Monitors ◽  
Walking Time

Purpose. To examine the accuracy of intensity and inclinometer output of three physical activity monitors during various sedentary and light-intensity activities.Methods. Thirty-six participants wore three physical activity monitors (ActiGraph GT1M, ActiGraph GT3X+, and StepWatch) while completing sedentary (lying, sitting watching television, sitting using computer, and standing still) light (walking 1.0 mph, pedaling 7.0 mph, pedaling 15.0 mph) intensity activities under controlled settings. Accuracy for correctly categorizing intensity was assessed for each monitor and threshold. Accuracy of the GT3X+ inclinometer function (GT3X+Incl) for correctly identifying anatomical position was also assessed. Percentage agreement between direct observation and the monitor recorded time spent in sedentary behavior and light intensity was examined.Results. All monitors using all thresholds accurately identified over 80% of sedentary behaviors and 60% of light-intensity walking time based on intensity output. The StepWatch was the most accurate in detecting pedaling time but unable to detect pedal workload. The GT3X+Incl accurately identified anatomical position during 70% of all activities but demonstrated limitations in discriminating between activities of differing intensity.Conclusions. Our findings suggest that all three monitors accurately measure most sedentary and light-intensity activities although choice of monitors should be based on study-specific needs.

scholarly journals Faktor Biotik dan Abiotik pada Tempat Perkembangbiakan Anopheles spp. di Desa Gunung Jati, Kecamatan Pagedongan, Banjarnegara, Provinsi Jawa Tengah

2018 ◽  
pp. 153-162
Author(s):  
Dyah Widiastuti ◽  
Anggun Paramita Djati ◽  
Nova Pramestuti
Keyword(s):  
Light Intensity ◽  
Water Temperature ◽  
Environmental Conditions ◽  
Water Samples ◽  
Endemic Area ◽  
Abiotic Factors ◽  
Optimum Conditions ◽  
Malaria Endemic Area ◽  
Breeding Sites ◽  
Larvae Density

Malaria transmission in Gunung Jati Village, Banjarmegara needs serious attention because this village is malaria endemic area. This study aimed to investigate the biotic and abiotic environmental conditions at Anopheles spp. breeding sites in Gunung Jati village, Banjarnegara. Anopheles spp. larvae collection, measurement of abiotic factors and observation of microbiota on water samples were conducted on May 2015. Anopheles spp. larva was found  in puddles on the banks of the river with larvae density was 5 larvae per dip. Water temperature conditions in all breeding sites ranged from 26-32 oC, the degree of acidity was neutral, with varying light intensity. Synedra are the most commonly found algae from all observed breeding sites. The environmental conditions were in accordance with the optimum conditions that support the development of Anopheles spp. larvae

Diel activity patterns of urban Woodchucks (Marmota monax) revealed by camera traps at burrows in southwestern Ontario, Canada

2021 ◽  
Vol 134 (4) ◽  
pp. 353-360
Author(s):  
Ronny Steen
Keyword(s):  
Direct Observation ◽  
Activity Pattern ◽  
Daily Activity ◽  
Abiotic Factors ◽  
Activity Patterns ◽  
Statistical Modelling ◽  
Camera Traps ◽  
Diel Activity ◽  
Marmota Monax ◽  
Invasive Method

Animals display a range of diurnal and nocturnal activity patterns and, among mammals, a high proportion of species are crepuscular or nocturnal. Daily activities are often endogenous and oscillate on a light:dark regime. Such cycles are referred to as ‘circadian’ and are generally influenced by biotic and abiotic factors. I investigated the daily activity of urban Woodchucks (Marmota monax) by using 24-hour camera traps at backyard burrows in London, Ontario, Canada, in June. Cameras enabled the collection of data that would otherwise have been labour intensive by direct observation. Statistical modelling showed that Woodchucks exhibited a strictly diurnal activity pattern. The unimodal activity pattern started at sunrise and ended before sunset. The general daily activity trend was similar to the pattern described by others who used direct observations and telemetry to monitor Woodchucks in more rural settings. Temperature and wind were not included in the best-fit model. Camera trapping is a non-invasive method that could give insight to diel activity as it can easily monitor extended periods and reduce the effort required by direct observation.

Light intensity, photoperiod duration, daily light flux and coral growth of Galaxea fascicularis in an aquarium setting: a matter of photons?

2011 ◽  
Vol 92 (4) ◽  
pp. 703-712 ◽  
Author(s):  
Miriam Schutter ◽  
Rosa M. van der Ven ◽  
Max Janse ◽  
Johan A.J. Verreth ◽  
René H. Wijffels ◽  
...  
Keyword(s):  
Light Intensity ◽  
Growth Rates ◽  
Abiotic Factors ◽  
Light Flux ◽  
Light Treatment ◽  
Coral Growth ◽  
Dark Cycle ◽  
Photosynthetic Rates ◽  
Galaxea Fascicularis ◽  
Light Duration

Light is one of the most important abiotic factors influencing the (skeletal) growth of scleractinian corals. Light stimulates coral growth by the process of light-enhanced calcification, which is mediated by zooxanthellar photosynthesis. However, the quantity of light that is available for daily coral growth is not only determined by light intensity (i.e. irradiance), but also by photoperiod (i.e. the light duration time). Understanding and optimizing conditions for coral growth is essential for sustainable coral aquaculture. Therefore, in this study, the question was explored whether more light (i.e. more photons), presented either as irradiance or as light duration, would result in more growth. A series of nine genetically identical coral colonies of Galaxea fascicularis L. were cultured for a period of 18 weeks at different light duration times (8 hours 150 μE m−2 s−1:16 hours dark, 12 hours 150 μE m−2 s−1:12 hours dark, 16 hours 150 μE m−2 s−1:8 hours dark, 24 hours 150 μE m−2 s−1:0 hours dark) and different irradiance levels (8 hours 150 μE m−2 s−1:16 hours dark, 8 hours 225 μE m−2 s−1:16 hours dark and 8 hours 300 μE m−2 s−1:16 hours dark). Growth was determined every two weeks by measuring buoyant weight. Temperature, salinity and feeding levels were kept constant during the experiment. To detect possible acclimation of the corals to an increased light duration, rates of net photosynthesis and dark respiration were measured, hereby comparing coral colonies grown under an 8:16 hours light (150 μE m−2 s−1):dark cycle with corals grown under a 16:8 hours light (150 μE m−2 s−1):dark cycle. No increase in growth was detected with either increasing photoperiod or irradiance. Continuous lighting (24 hours 150 μE m−2 s−1:0 hours dark) resulted in immediate bleaching and the corals died after 14 weeks. Hourly photosynthetic rates were significantly reduced in the 16 hour light treatment compared to the 8 hour light treatment. As a result, daily net photosynthetic rates were not significantly different, which may explain the observed specific growth rates. Acclimation to photoperiod duration appeared neither to be mediated by changes in chlorophyll-a concentration nor zooxanthellae density. Based on the results of this study, we can conclude that the enhancing effect of light on coral growth is not only a matter of photons. Obviously, the availability of light was not limiting growth in these experiments and was probably in excess (i.e. stressful amounts). Other factors are discussed that play a role in determining growth rates and might explain our results.

scholarly journals The effect of abiotic factors on the hatching of Moina micrura Kurz, 1874 (Crustacea: Cladocera) ephippial eggs

2001 ◽  
Vol 61 (3) ◽  
pp. 371-376 ◽  
Author(s):  
N. E. T. ROJAS ◽  
M. A. MARINS ◽  
O. ROCHA
Keyword(s):  
Light Intensity ◽  
Fish Larvae ◽  
Abiotic Factors ◽  
Deionized Water ◽  
Ionic Concentrations ◽  
Hatching Rates

The roles of some abiotic factors in controlling the hatching rates of Moina micrura ephippial eggs were investigated. Determination of optimum hatching conditions would be important in developing the use of this species as a food for fish larvae in aquaculture. Ephippia were exposed to different treatments in the laboratory, and monitored for hatching over a period of seven days. Optimum hatching conditions were: pH 5-9, temperature 25ºC, photoperiod eight or more hours light per day and light intensity equal to or greater than 850 lux. Differences in water ionic concentrations (from deionized water to 880 mg.L<FONT FACE=Symbol>-</FONT>1 of selected salts) had no effect.

scholarly journals Diversity and Distribution of Myrmecophytes in Bengkulu Province

2017 ◽  
Vol 9 (2) ◽  
Author(s):  
Safniyeti Safniyeti ◽  
Sulistijorini Sulistijorini ◽  
Tatik Chikmawati
Keyword(s):  
Principal Component Analysis ◽  
Light Intensity ◽  
Medicinal Plant ◽  
Sampling Method ◽  
Abiotic Factors ◽  
Principal Component ◽  
Local People ◽  
Basic Information ◽  
Purposive Sampling ◽  
Additional Income

<p>Myrmecophyte is a common medicinal plant used by local people in Indonesia for treating various diseases especially in Papua. Bengkulu province is one of the myrmecophyte habitats, but there has no report on its identity and distribution. The objectives of this research were to identify the diversity and analyze the myrmecophytes distribution as well as factor affecting its presence. This study used purposive sampling method by exploring the area where myrmecophytes commonly found. The myrmecophyte distribution was analyzed using <em>Morishita</em> index and <em>Arcgis</em> 10.1, and the autecological analysis of abiotic factors was performed using <em>Principal Component Analysis</em> (PCA) generated from Minitab 16. The results of this research showed that there were two species of myrmecophytes in Bengkulu province, namely <em>Hydnophytum formicarum</em> and <em>Myrmecodia tuberosa</em>, as well as two variants of <em>M. tuberosa</em> i.e. <em>M. tuberosa</em> 'armata’ and <em>M. tuberosa</em> 'siberutensis'. The distribution of myrmecophytes was mostly randomly scattered in Central Bengkulu regency, Seluma, North Bengkulu, South Bengkulu, and Kaur. Their distributions were affected by light intensity and temperature. The data of this research can be used as basic information for carried out conservation efforts in Bengkulu province. The abundance of myrmecophytes is also used as a source of additional income for local people in Bengkulu province.      </p>

scholarly journals Ketersediaan Tumbuhan Pakan dan Daya Dukung Habitat Rusa timorensis de Blainville, 1822 di Kawasan Hutan Penelitian Dramaga

2016 ◽  
Vol 17 (2) ◽  
pp. 129
Author(s):  
Rozza T. Kwatrina ◽  
Mariana Takandjandji ◽  
M. Bismark
Keyword(s):  
Light Intensity ◽  
Carrying Capacity ◽  
Dry Weight ◽  
Plant Productivity ◽  
Forest Area ◽  
Fresh Weight ◽  
Intensity Correlation ◽  
Plant Availability ◽  
Observation Area ◽  
Area Data

<p>Feed Plant Availability and Carrying Capacity of Rusa timorensis deBlainville, 1822 at Dramaga Research Forest Area. The research was conducted to know potenstial feed plant availability and carrying capacity at Dramaga Research Forest Area. Data was collected by measuring feed plant productivity of 45 plots with size 1 m x 1 m, and consumption level of four rusa deer (Rusa timorensis de Blainville, 1822). The result showed that the highest feed plant productivity was 17,362.09 kg/ha/year, and the lowest was 502.22 kg/ha/year. Light intensity correlation (y. lux) with dry weight production in 20 days (x. kg/ha), is y = 4.64 x -15.46 (r = 0.95). Feed plant availability was 121,607.01 kg/year, while consupmtion level based on fresh weight was 6,4 kg/individual/day or 2,336 kg/individual/year. Carrying capacity on observation area (11.9 ha) was 52 individual/year or 3.13 individual/ha/year.</p><p> </p><p><strong>Abstrak</strong></p><p>Penelitian bertujuan untuk mengetahui ketersediaan hijauan pakan potensial serta daya dukung kawasan Hutan Penelitian Dramaga sebagai sumber pakan rusa timor (Rusa timorensis de Blainville, 1822) di penangkaran. Pengukuran produktivitas hijauan pakan dilakukan dalam 45 plot contoh berukuran 1 m x 1 m, serta pengamatan tingkat konsumsi pakan terhadap empat individu rusa timor (R. timorensis) yang mewakili jantan, betina, kelas umur anak dan dewasa. Hasil penelitian menunjukkan bahwa produktivitas bobot basah hijauan pakan rusa timor (R. timorensis) di Hutan Penelitian Dramaga tertinggi adalah 17.362,09 kg/ha/tahun dan yang terendah sebesar 502,22 kg/ ha/tahun. Korelasi produktivitas hijauan dengan intensitas cahaya (y, lux) dengan produktivitas bobot kering dalam 20 hari (x, kg/ha) adalah y = 4,64 x -15,46 (r = 0,95). Ketersediaan pakan rata-rata pada Hutan Penelitian Dramaga sebesar 121.607,01 kg/tahun sedangkan tingkat konsumsi pakan rusa timor (R. timorensis) berdasarkan bobot basah pakan adalah 6,4 kg/individu/hari atau 2.336 kg/individu/tahun. Pada areal yang diamati seluas 11,9 ha maka daya dukung habitat adalah 52 individu/tahun atau rata-rata sebesar 3,13 individu/ha/tahun.</p>

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