scholarly journals KARAKTERISTIK HABITAT TEMPAT BERTELUR PENYU SISIK (Eretmochelys imbricata ) DI TAMAN WISATA ALAM TANJUNG KELUANG KECAMATAN KUMAI KALIMANTAN TENGAH

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Muhamad Nur Karim ◽  
Slamet Rifanjani ◽  
Sarma Siahaan
Keyword(s):  
Air Temperature ◽  
Sea Water ◽  
Egg Laying ◽  
Habitat Characteristics ◽  
Water Salinity ◽  
Nest Temperature ◽  
Air Humidity ◽  
Eretmochelys Imbricata ◽  
Ghost Crabs ◽  
Varanus Salvator

This research aimed to discover the characteristics of hawksbill turtle egg-laying place (Eretmochelys imbricata) in the Tanjung Keluang Nature Park of Kumai District Central Kalimantan. The data which is collected to describe the characteristics of the habitat covers the length of the beach, its width, its slope, the distance of the nest with the vegetation, the air humidity, the air temperature, the nest temperature, the moisture content of sand substrate, the texture of sand substrate, the water salinity, and other factors that threaten the hawksbill turtle egg-laying place habitat. From the location of the study, it was found that the length of the beach that becomes the egg-laying place is 5000 meters and 1200 meters that do not become the egg-laying place, the beach width is about 3 – 12 meters at the highest tide and 9 – 20 meters at the lowest tide, the slope of the beach where the nest is found ranges from 10 to 15% and 8 – 11% where the nest cannot be found, the nest distance with the vegetation is about 0 – 2 meters, the air humidity is around 94,7% - 68,8%, the air temperature is about 28,830C - 330C, the nest temperature is about 28,620C, the sand substrate texture is medium with 0,21 – 0,50 µm, and the sea water salinity is 27,5%. At the location of the study there was found that every hawksbill turtle nest located in a shade of sea pandan trees (Pandanus tectorius). Hawksbill turtles are threatened by predators such as monitor lizards (Varanus salvator), ghost crabs (Ocypoda sp), fishing activities, waste bins, and natural factors such as coastal abrasion and the presence of weeds growing on the beach surface. Keyword: Habitat Characteristics, Hawksbill turtle, Tanjung Keluang Natural Park

scholarly journals Kecocokan Habitat Bertelur Penyu Sisik Eretmochelys imbricate, Linnaeus, 1766 (Reptilia : Cheloniidae) di Balai Taman Nasional Laut Kepulauan Seribu, Jakarta

2019 ◽  
Vol 8 (2) ◽  
pp. 168-176
Author(s):  
Dodi Rachman ◽  
Edi Wibowo Kushartono ◽  
Gunawan Widi Santosa
Keyword(s):  
Random Sampling ◽  
Habitat Characteristics ◽  
Survey Method ◽  
Long Distance ◽  
Eretmochelys Imbricata ◽  
Air Content ◽  
Coastal Slope ◽  
Varanus Salvator ◽  
Monitor Lizards ◽  
Descriptive Survey

Penyu Sisik (Eretmochelys imbricata) adalah penyu yang memiliki ciri khas moncong berbentuk paruh, rahang atasnya melengkung ke bawah dan relatif tajam seperti burung kakak tua sehingga sering disebut “Hawksbill turtle”. Penyu jenis ini adalah pemakan terumbu karang yang tidak sehat sehingga terumbu karang menjadi sehat kembali.Tujuan dari penelitian ini adalah Mengetahui lokasi atau hotspot area peneluran penyu di Pulau Peteloran Timur Balai Taman Nasional Laut Kepulauan Seribu dan Mengetahui karakteristik habitat penyu dalam memilih lokasi bersarang dan bertelur. Metode yang digunakan dalam penelitian ini adalah metode Survey Deskriptif. Pengumpulan data dilakukan dengan cara observasi langsung di lapangan meliputi pengukuran panjang, lebar, dan kemiringan pantai, pengukuran suhu, identifikasi vegetasi pantai, predator dan kelembaban sarang serta pengukuran jenis substrat sarang di laboratorium geologi Universitas Diponegoro. Penentuan stasiun pengamatan menggunakan metode Purposive Random Sampling. Hasil penelitian menunjukkan ditemukannya 2 sarang Penyu Sisik (Eretmochelys imbricata) di bagian sebelah timur pulau dengan total jumlah 390 butir telur. Panjang pantai Pulau Peteloran Timur setiap stasiunnya berkisar 4,80–13,20 m,  lebar pantainya 12–19,60 m. Kemiringan pantai Pulau Peteloran Timur mencapai 0,07–0,23°. Hasil pengukuran suhu berkisar 31–34 °C. Kadar air sedimen berkisar antara 0,002–0,004 %. Ukuran butir pasir Pulau Peteloran Timur didominasi pasir kasar dengan mencapai 48,55%. Vegetasi yang mendominasi adalah Pandan (Pandanus tectorius) selebihnya vegetasi campuran. Predator yang dijumpai di lapangan adalah Biawak (Varanus salvator). Hawksbill turtle (Eretmochelysimbricata) is a turtle that has the characteristics of a half-shaped muzzle, its upper jaw is curved downward sharply and often called the "Hawksbill Turtle". This type of turtle is an unhealthy coral reef eater so that the coral reefs are able to maintain its healthy condition.The purpose of this research is to know the location or hotspot area of turtle nesting in the east peteloran, Seribu Archipelago national park and to know the habitat characteristics of turtle in choosing nesting and laying eggs location. The method used in this research was descriptive survey method. The data collection were done by direct observation in a long-distance field by assessing the width, and coastal slope, temperature measurement, predator and humidity of nest and measurement of nest type in the geological laboratory of Diponegoro University. Determination of the location was determined by purposive random sampling method. The results showed 2 Hawksbill nests (Eretmochelysimbricata) in the eastern part of the island had a total of 390 eggs. The length of the East Peteloran Island beach each station ranged from 4.80 to 13.20 m, the beach width of 12-19.60 m. The eastern coastal slope of East Peteloran Island reached 0.07-0.23°. The temperature measurements ranged from 31-34° C. Sediment air content ranged from 0.002-0.004%. The size of the sand grains of East Peteloran Island was dominated by a sand average of 48.55%. Vegetation that dominates were Pandan (Pandanustectorius) and the others were mixed vegetation. Predator found in the field was monitor Lizards (Varanussalvator).

A reflexion on the environmental effect on the transmission of COVID-19

2021 ◽  
Author(s):  
Victor L Barradas ◽  
Monica Ballinas
Keyword(s):  
Solar Radiation ◽  
Air Temperature ◽  
Low Temperatures ◽  
Minimum Distance ◽  
Vapor Pressure Deficit ◽  
Environmental Parameters ◽  
Air Humidity ◽  
Evaporative Demand ◽  
Small Water ◽  
The Hours

<p>This research is a general reflection of the possible transmission not only of COVID-19 but of any influenza disease depending on environmental parameters such as solar radiation, air humidity and air temperature (vapor pressure deficit), evoking the Penman-Monteith model regarding the evaporation of the water that constitutes the small water droplets (aerosols) that carry the virus. In this case the evapotranspiration demand of the atmosphere with which it can be deduced that the spread of the disease will be higher in those places with less evaporative demand, that is, high air humidity and / or low temperatures, and / or low radiation intensities, and vice versa. It can also be deduced that the hours of greatest potential contagion are the night hours, while those with the lowest risk are between 2:00 p.m. and 4:00 p.m. On the other hand, in those rooms with low temperatures the contagion would be more effective. So, considering that the drops produced by a sneeze, by speaking or breathing can go beyond two meters away, it is roughly explained that the use of face masks and keeping a safe minimum distance of two meters can limit transmission of viruses and / or infections. However, this practice is not entirely safe as the environment can play an important role. What is recommended to reduce the spread of these pathogens is to produce high evaporative demands: increasing solar radiation, and increasing air temperature and reducing air humidity, which is practice that can be effective in closed rooms.</p>

Hydro-meteorological data preparation for ecosystem hydrological modelling in the riparian forest of Hidegvíz Valley experimental catchment

2021 ◽  
Author(s):  
Csenge Nevezi ◽  
Tamás Bazsó ◽  
Zoltán Gribovszki ◽  
Előd Szőke ◽  
Péter Kalicz
Keyword(s):  
Air Temperature ◽  
Meteorological Parameters ◽  
Extreme Event ◽  
Riparian Forest ◽  
Meteorological Data ◽  
Rain Gauge ◽  
Hydrological Modelling ◽  
Data Preparation ◽  
Air Humidity ◽  
Groundwater Levels

<p>In the Hidegvíz Valley experimental catchment in Hungary the meteorological data have been collected since the 1990s and used for various purposes including hydrological studies. Current research began in 2018–19, that aimed to reveal the connections between the hydrological and botanical characteristics in riparian forests and a wet meadow. Changes that occurred in both ecosystems in the groundwater levels, soil moisture and vegetation, showed that the local meteorological events influence these factors. Therefore we decided to analyse longer periods in which meteorological extremes<br>strongly influenced hydrological conditions and so status of ecosystems. Further measurements and their analysis were also required because more accuracy and detail were needed for future water balance modelling.</p><p>The measured data between 2017–2020 were chosen as a starting database. For the first analysis we selected three meteorological parameters, i. e. the precipitation, the air temperature, and the air humidity. These parameters were measured by automated instruments, except for the precipitation. We found that the automated tipping-bucket rain gauge needs validation by a manual measurement (Hellmann-type rain gauge), because the data that collected by the automated device will be invalid if the rain intensity is too high.</p><p>In 2017 and 2018, the annual precipitation was distributed evenly, but in the following two years we observed some extremes. In 2019 and<br>2020, the spring was especially dry, the lowest monthly sum was 1.2 mm in 2020 April. 2019 April was similar (19.5 mm), but after the drought<br>period intense rainfall events arrived in May, resulted a monthly total of 214.1 mm. Air temperature and air humidity has not been showed such extremes as the precipitation.</p><p>This study showed that detailed analysis of meteorological parameters is crucial for hydrological modelling data preparation because errors and extreme event can cause serious problems during modelling process and, also in case of evaluation of model results.</p><p>The research has been supported by the Ministry of Agriculture in Hungary.</p>

scholarly journals ПРОГНОЗ РАЗМНОЖЕНИЯ ВРЕДОНОСНЫХ ПОКОЛЕНИЙ ГРОЗДЕВОЙ ЛИСТОВЕРТКИ В УСЛОВИЯХ РАВНИННО-СТЕПНОГО КРЫМА

2012 ◽  
pp. 84-87
Author(s):  
С. Н. Лебедев
Keyword(s):  
Mathematical Models ◽  
Air Temperature ◽  
Lobesia Botrana ◽  
Air Humidity ◽  
Protective Measures ◽  
Relative Air Humidity

Наводяться дані про залежність розвитку шкід-ливих поколінь ґронової листовійки на винограднихнасадженнях рівнинно-степового Криму від абіо-тичних чинників: середньодобової температуриповітря, суми опадів, відносної вологості повітря,а також площі листової поверхні куща винограду.На основі цих даних розроблені математичні мо-делі прогнозу розвитку фітофага, що дадуть змо-гу оптимізувати кратність і своєчасність захис-них заходів у боротьбі з зазначеним шкідником наконкретному сорті винограду. Provides information on the intent of the development ofmalicious generations Lobesia botrana of the leaf rolleron vine plantations of plain-steppe Crimea from abioticfactors: the average daily air temperature, amount of precipitation,relative air humidity, as well as the area of leafsurface bush of grapes. On the basis of these datadeveloped mathematical models of forecasting of thedevelopment of the phytophage, that allows to optimizethe frequency and timeliness of protective measures inthe fight against this pest on a particular cultivar ofgrapes.

Shoot Population Dynamics of Carex kobomugi on a Coastal Sand Dune in Relation to its Zonal Distribution

1998 ◽  
Vol 46 (1) ◽  
pp. 111 ◽  
Author(s):  
S.-I. Ishikawa ◽  
N. Kachi
Keyword(s):  
Population Dynamics ◽  
Soil Water ◽  
Growth Form ◽  
Sea Water ◽  
Injury Rate ◽  
Coastal Dunes ◽  
Imperata Cylindrica ◽  
Water Salinity ◽  
Zonal Distribution ◽  
Carex Kobomugi

Shoot population dynamics of Carex kobomugi Ohwi, a rhizomatous perennial sedge with a guerilla-type growth form, dominating on Japanese coastal dunes, were examined to detect factors generating the zonal distribution pattern of the plant species. Relative growth rate of shoot (RGRS) and number of branching shoots formed by a mother shoot in a year (NBr) were measured in three populations occurring at three different distances from the shoreline. In 1992, Carex kobomugi shoots at the most inland site (90 m from the shoreline), where Imperata cylindrica var. koenigii dominated and soil-water salinity is always low, showed the lowest RGRS (0.0172 g g-1 day-1 from April to June and 0.00079 g g-1 day-1 in July) and the smallest NBr (1.3 shoots shoot-1 year–1 averaged for 3 years). Shoots of the species at the most seaward site (40 m from the shoreline), where the soil-water salinity is always higher than that of more inland sites, showed the highest RGRS (0.0228 g g-1 day-1 from April to June and 0.0093 g g-1 day-1 in July) and the largest NBr (2.5 shoots-1). However, Carex kobomugi population at the 40 m site had a high fraction of injured shoots (46% of total shoots sampled), which were recorded as shoots without any greenish above-ground part, and high mortality (0.34) due to temporal flooding of sea water caused by storms. In the intermediate site (70 m from the shoreline), Carex kobomugi had intermediateRGRS and NBr with low injury rate. The NBr value, however, showed a decreasing trend over the 3 years of observation, suggesting deteriorating effects of intraspecific competition on population dynamics. In the spring of the fourth year, shoots of Carex kobomugi at 70 m and 90 m from the shoreline produced 1.2 to 2.0 times higher number of buds per shoot than the 3-year-averaged NBrs. This suggests that some fractions of the buds were terminated or became dormant through intra- and/or inter-specific competition. The sparse distribution of Carex kobomugi at the 90 m site may be dictated by its competitive inferiority to Imperata cylindrica which has a denser root system and an aggressive growth form of a phalanx type.

scholarly journals PERTUMBUHAN DAN PRODUKSI KEDELAI AKIBAT INOKULASI BAKTERI RHIZOBIUM DAN PENAMBAHAN HARA AIR LAUT

Pastura ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 7
Author(s):  
Eny Fuskhah ◽  
Adriani Darmawati
Keyword(s):  
Water Hyacinth ◽  
Dry Matter ◽  
Sea Water ◽  
Salinity Level ◽  
Water Salinity ◽  
Dry Matter Production ◽  
Fresh Weight ◽  
Rhizobium Inoculation ◽  
Matter Production ◽  
Number Of Leaves

The research aim is to use sea water as nutrient source of plant especially soybean, so it reduces amount of anorganic fertilizer usage. The research held in green house of Ecology and Plant Production Laboratory of Animal Husbandry and Agriculture Faculty, Diponegoro University Semarang. Sea water as sample was taken from Semarang Marina Beach. Soybean which choosen is local bean of Grobogan. The design arranged was completely randomized design with factorial design 4 x 2 in 4 replications. First factor was sea water salinity level, L0 = without sea water and without mulch, L1 = sea water EC 1 mmhos/cm and water hyacinth mulch of 8 tons/ha, L2 = sea water EC 2 mmhos/cm and water hyacinth mulch of 8 tons/ha, L3 = sea water EC 3 mmhos/cm and water hyacinth mulch of 8 tons/ha. The second factor was Rhizobium inoculation, R1 = without rhizobium inoculation, and R2 = with Rhizobium inoculation. The parameters were length plant, number of leaves, fresh weight production of shoot and dry matter production. Based on variant analysis, showed no influenced between sea water salinity level and rhizobium inoculation againt to length plant, number of leaves, fresh weight production of shoot and dry matter production. Sea water and rhizobium inoculation tended to increase growth and production of soybean.Key words : soybean, nutrient of sea water, rhizobium, growth, production.

Reducing Activity and the Formation of Base in the Shore Crab, Carcinus Maenas

1985 ◽  
Vol 65 (2) ◽  
pp. 505-530 ◽  
Author(s):  
Peter S. B. Digby
Keyword(s):  
Outer Surface ◽  
Biological Material ◽  
Sea Water ◽  
Carcinus Maenas ◽  
Water Salinity ◽  
Shore Crab ◽  
Calcareous Deposits ◽  
Reducing Activity ◽  
Diffusion Potentials ◽  
Active Processes

Crustacean cuticle consists essentially of chitin impregnated and coated with protein which is tanned with quinone (Dennell, 1947a). The outer surface is most heavily tanned, and the cuticle is further strengthened by calcification. The various theories as to the mechanism of calcification in crustacean and other biological material have been reviewed briefly by Digby (1967). Most appear unsatisfactory for various reasons, and evidence was outlined that calcification might arise from the formation of base by processes which are essentially electrochemical in origin. The quinone-tanned protein of the cuticle is electrically semiconducting and supports electrode action in suitable gradients of potential (Digby, 1965), and small potential differences may arise by diffusion or by active processes. Thus the deposition of calcareous salts might arise partly at least by action comparable to that which takes place at a metallic cathode. In support of this, the position of the initial calcareous deposits in Carcinus maenas (L.) was found to change with the gradient of sea-water salinity in the manner expected if some control were exercised by diffusion potentials, acting across a thin semiconducting layer to generate small changes of pH (Digby, 1968).

scholarly journals INVESTIGATION AND EVALUATION OF H2S EMISSIONS FROM A MUNICIPAL LANDFILL / SIEROS VANDENILIO IŠSISKYRIMO KOMUNALINIŲ ATLIEKŲ SĄVARTYNE TYRIMAI IR ĮVERTINIMAS / ИССЛЕДОВАНИЯ ПО ОЦЕНКЕ ВЫБРОСОВ СЕРНИСТОГО ВОДОРОДА НА СВАЛКЕ МУНИЦИПАЛЬНЫХ ОТХОДОВ

2011 ◽  
Vol 19 (1) ◽  
pp. 12-20 ◽  
Author(s):  
Saulius Vasarevičius
Keyword(s):  
Air Temperature ◽  
Hydrogen Sulphide ◽  
Air Humidity ◽  
Monitoring Wells ◽  
Municipal Landfill ◽  
Different Seasons

The aim of investigation was to evaluate the degree of pollution caused by a municipal landfill and determine the dependence of the amounts of emissions of the odorant hydrogen sulphide (H2S) on different parameters of the environment. The Jerubaičiai landfill in Plungė district was selected for the investigation. Measurements were recorded at 59 points and 2 monitoring wells. The measurement points and places were selected so that the landfill places generating the largest amounts of H2S and the directions of pollutant movement are identified. It was determined that the amounts of H2S varied from 0.9 ppm (in February) to 8.6 ppm (in August) in different places of the landfill. The largest amounts of H2S were identified in the areas of freshly-tipped waste. Odorants in these zones are generated during waste tipping out of trucks or waste pushing. H2S generation in the top layer of waste changes during the day and different seasons of the year. It is mainly influenced by air temperature. No dependence between H2S generation velocity and air humidity or pressure was identified. Santrauka Tyrimų tikslas buvo įvertinti komunalinių atliekų sąvartyno skleidžiamą taršą ir nustatyti išsiskiriančio odoranto sieros vandenilio (H2S) kiekių priklausomumą nuo įvairių aplinkos parametrų. Tyrimams buvo pasirinktas Jerubaičių sąvartynas Plungės rajone. Matavimai atlikti 59 taškuose ir dviejuose monitoringo šuliniuose. Matavimo taškai ir vietos pasirinkta daugiausia H2S generuojančioms sąvartyno vietoms bei teršalų judėjimo kryptims nustatyti. Nustatyta, kad įvairiose sąvartyno vietose H2S kiekiai kinta nuo 0,9 ppm (vasario mėn.) iki 8,6 ppm (rugpjūčio mėn.). Didžiausi H2S kiekiai rasti ten, kur išpilamos naujai atvežamos atliekos. Šiose zonose odorantai išsiskiria sunkvežimiams išpilant atliekas ir jas stumdant.Per dieną ir įvairiais metų laikais viršutiniame atliekų sluoksnyje susidaro nevienodi H2S kiekiai. Didžiausią įtaką turi oro temperatūra. Priklausomybių tarp H2S susidarymo greičio ir oro drėgmės bei slėgio nenustatyta. Резюме Целью исследования было оценить загрязнение окружающей среды, вызываемое муниципальными отходами на свалке, и определить зависимость количества выбрасываемого сернистого водорода (H2S) от условий окружаю щей среды. Исследования проводились на свалке Йерубайчай в районе Плунге. Измерения проводились в 59 точ ках и 2 колодцах мониторинга. Точки для измерений были подобраны таким образом, чтобы выявить зоны свалки с наибольшим количеством выбросов H2S. В ходе исследования установлено, что количество H2S меняется от 0,9 ppm (в феврале) дo 8,6 ppm (в августе). Наибольшие количества H2S найдены в местах выгрузки привозимых отходов. Выделение H2S из верхнего слоя отходов меняется в течение дня и в разное время года. Наибольшее влияние на выделение H2S оказывает температура воздуха. Зависимости между количеством выбрасываемого H2S и относительной влажностью или давлением воздуха не установлено.

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