scholarly journals Study on Abundance and Distribution Pattern of Collembola on Three Types of Land Utilizations in Banjar Regency, South Kalimantan

2020 ◽  
Vol 5 (3) ◽  
pp. 107-117
Author(s):  
Manap Trianto ◽  
Fajri Marisa
Keyword(s):  
Environmental Factors ◽  
Distribution Pattern ◽  
Oil Palm ◽  
Sampling Method ◽  
Distribution Patterns ◽  
Sampling Location ◽  
Ecosystem Development ◽  
Soil Organism ◽  
Land Utilization ◽  
Abundance And Distribution

Collembola is one of soil organism which classified as mesofauna. This reseach is aims to study the abundance and distribution patterns of Collembola on three types of land utilization in Banjar District, South Kalimantan Province. This research was conducted on April 2020 by using a purposive sampling method. Based on results of Collembola identification obtained at the sampling location, there are 12 genera, 6 families, and 2 orders of Collembola. The highest abundance is found in oil palm plantations. While the Collembola distribution pattern on the three types of land clearing is the same, which is clustering. The results of this study are expected to provide information on the study of abundance and distribution patterns of Collembola in South Kalimantan Province related to environmental factors also help in carrying out sustainable ecosystem development.

scholarly journals POPULATION DENSITY AND DISTRIBUTION PATTERNS OF KALAMBODO MUSSEL (Anodonta woodiana) IN THE SUB WATERSHED OF LAHOMBUTI RIVER, LAHOTUTU VILLAGE, KONAWE DISTRICT SOUTH EAST SULAWESI

AQUASAINS ◽  
2017 ◽  
Vol 8 (1) ◽  
pp. 759
Author(s):  
Muhammad Fajar Purnama ◽  
Abdullah Abdullah ◽  
Alfi Kusuma Admaja ◽  
La Ode Alirman Afu
Keyword(s):  
Population Density ◽  
Random Sampling ◽  
Sampling Method ◽  
Rice Field ◽  
Distribution Patterns ◽  
Average Density ◽  
Sampling Location ◽  
Channel Diameter ◽  
Irrigation Channel ◽  
Anodonta Woodiana

Abstrak The research was conducted in November 2018 - February 2019 in the Sub-watershed of the Lahombuti River in Lahotutu Village, Konawe Regency. The purpose of this study was to determine aspects of population density and distribution patterns of the Kalambodo (A. woodiana) in the Sub watershed of the Lahombuti tributary in Lahotutu Village, Wonggeduku District, Konawe Regency. The sampling location was determined using the purposive random sampling method. Sampling of Kalambodo (A. woodiana) was carried out at the location with the greatest abundance of A. woodiana, in the Sub watershed of the Lahombuti tributary of Lahotutu Village, on the "Main Rice Field Irrigation Channel" (diameter: ± 1,75 m, length: ± 4500 m, depth: ± 110 cm). Sampling of A. Woodiana was carried out at the same station with different spot sampling points. The Kalambodo samples were taken using a 1x1 m2 sized transect on 3 randomly assigned plots. The range of A. woodiana density per sub station is November 2018 amounting to 67-95 ind/m2, December 2018 is 41-61 ind/m2, January 2019 is 41-148 ind/m2 and February 2019 is 101- 114 ind/m2. The average density based on the period from the highest to the lowest is obtained in February 2019, January 2019, November 2018, and December 2018, which is 106.67 ind/m2, 81.33 ind/m2, 78 ind/m2, and 53 ind/m2, respectively. The distribution pattern of A. woodiana in the Sub-watershed of the Lahombuti River Basin generally shows a uniform category (Id <1), with a range of morisitha index values of 0.65-0.87.

THE INFLUENCE OF ENVIRONMENTAL FACTORS TO MOLLUSCS DISTRIBUTION PATTERNS IN NATURAL AND REHABILITATED MANGROVE ECOSYSTEM

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Andi Nur Samsi ◽  
Sharifuddin Bin Andy Omar ◽  
Andi Niartiningsih
Keyword(s):  
Environmental Factors ◽  
Distribution Pattern ◽  
Quantitative Method ◽  
Distribution Patterns ◽  
Mangrove Ecosystem ◽  
Dispersal Patterns ◽  
Carbon And Nitrogen ◽  
Mangrove Ecosystems ◽  
Mollusc Species ◽  
Carbon And Nitrogen Content

Mangrove ecosystem is a habitat of Molluscs (Gastropoda and Bivalvia). This ecosystem is always influenced by environmental factors. This study aims to determine the influence of environmental factors on the distribution patterns Molluscs of natural mangrove ecosystems in Pannikiang Island, Barru Regency and rehabilitation mangrove ecosystem in Tongke-tongke village, Sinjai regency. This research uses the quantitative method. Environmental factors measured were temperature and salinity of the water, as well as carbon and nitrogen content of sediment. Samples of Molluscs (Gastropoda and Bivalves) and sediments were taken randomly. The observations of the Molluscan community include the composition of Mollusc species (Gastropoda and Bivalvia) and dispersal patterns. Data were analyzed by using multiple linear regression. The results showed that the distribution pattern of Molluscs (Gastropoda and Bivalvia) at both sites was not significantly different and the temperature, salinity, carbon, and nitrogen sediments also did not affect the Mollusk distribution pattern in both sites. Ekosistem mangrove merupakan habitat Moluska (Gastropoda dan Bivalvia). Ekosistem ini selalu dipengaruhi oleh faktor lingkungan. Penelitian ini bertujuan untuk mengetahui pengaruh faktor lingkungan terhadap pola distribusi  pada ekosistem mangrove alami di Pulau Pannikiang, Kabupaten Barru dan ekosistem mangrove hasil rehabilitasi di Desa Tongke-tongke, Kabupaten Sinjai. Penelitian ini menggunakan metode kuantitatif. Faktor lingkungan yang diukur adalah suhu dan  salinita air, serta kandungan karbon dan nitrogen sedimen. Sampel Moluska (Gastropoda dan Bivalvia) dan sedimen diambil secara acak. Pengamatan komunitas Moluska meliputi komposisi jenis Moluska (Gastropoda dan Bivalvia) dan pola penyebaran. Data dianalisis dengan menggunakan regresi linear berganda. Hasil penelitian menunjukkan pola distribusi Moluska (Gastropoda dan Bivalvia) pada kedua lokasi tidak berbeda nyata dan suhu, salinitas, karbon, dan nitrogen sedimen juga tidak mempengaruhi pola distribusi Moluska di kedua lokasi penelitian.

Mapping species distributions as a tool in marine ecology

1978 ◽  
Vol 76 (1-3) ◽  
pp. 201-213 ◽  
Author(s):  
Trevor A. Norton
Keyword(s):  
Environmental Factors ◽  
Distribution Pattern ◽  
Experimental Work ◽  
Current Velocity ◽  
Species Distributions ◽  
Distribution Patterns ◽  
Marine Species ◽  
Marine Ecology ◽  
Distribution Maps ◽  
Geographical Scale

SynopsisMaps are shown to be the most striking way of displaying the distribution of marine species on a geographical scale. They have been used to indicate not only the presence or absence of a species, but also its abundance. A single map only records the distribution pattern at a particular moment in time, but repeated mapping clearly demonstrates temporal fluctuations. Many ecological insights have been derived from distribution maps especially when they are compared with records of environmental factors such as substratum type, current velocity or temperature. Moreover maps actually stimulate experimental work which seeks to explain the distribution patterns displayed.

Intertidal meiofauna communities along an estuarine gradient in a protected area (Ria de Foz, north-west Spain)

2011 ◽  
Vol 92 (1) ◽  
pp. 63-72 ◽  
Author(s):  
M. Rubal ◽  
C. Besteiro ◽  
P. Veiga
Keyword(s):  
Environmental Factors ◽  
Distribution Pattern ◽  
Social Services ◽  
Nature Reserve ◽  
Environmental Gradients ◽  
River Mouth ◽  
Distribution Patterns ◽  
Environmental Variable ◽  
North West ◽  
Estuarine Gradient

The northern Galician rias provide important economic and social services from fisheries, shellfish harvesting and recreational activities. Consequently, these rias have been included in the Nature 2000 Network as a Special Conservation Zone. The aims of this study were to describe the meiofauna spatial structure in terms of diversity and abundance of major taxa, as well as its relationship with the environmental characteristics in the Ria de Foz nature reserve. For this aim, environmental gradients and distribution patterns of intertidal meiobenthic communities at the Ria de Foz nature reserve were studied using multivariate methods. Ria de Foz showed to be a complex transitional habitat with significant changes in its environment along the estuarine gradient. An abundant and rich meiofauna community was reported at Ria de Foz. A total of 21 higher taxa of meiofauna were found. The most common taxa were nematodes, copepods, ostracods and turbellarians. Three clear different meiobenthic communities were defined. These three communities showed a clear spatial distribution pattern along the estuarine gradient. Moreover, a high degree of similarity between distribution patterns of meiobenthic communities and previously studied macrobenthic communities was found. Regarding the role of environmental factors shaping meiobenthic community distribution patterns distance to the river mouth was the environmental variable that best explained meiobenthic community structure and distribution. Therefore, changes on hydrodynamics that affect environmental factors related to the estuarine gradient will change the distribution pattern and diversity of benthic communities. This work provides the first information about meiobenthos diversity and structure in the Ria de Foz nature reserve and should be useful for future management and conservation plans on this and other similar protected areas.

scholarly journals Fish abundance and distribution patterns related to environmental factors in a choked temperate coastal lagoon (Argentina)

2013 ◽  
Vol 61 (1) ◽  
pp. 43-53 ◽  
Author(s):  
Daniel Osvaldo Bruno ◽  
Santiago Aldo Barbini ◽  
Juan Martín Díaz de Astarloa ◽  
Patricia Martos
Keyword(s):  
Environmental Factors ◽  
Coastal Lagoon ◽  
Linear Models ◽  
Distribution Patterns ◽  
Middle Part ◽  
Fish Distribution ◽  
Representative Species ◽  
Abundance And Distribution ◽  
Odontesthes Argentinensis ◽  
Jenynsia Multidentata

The aim of this study was to assess the influence of environmental factors on the fish distribution and abundance in Mar Chiquita coastal lagoon. Seasonal fish sampling stations were distributed along the lagoon and grouped in three zones from a mixo-oligohaline waters zone with high contribution of freshwater to a mixo-eurihaline waters zone with high marine water influence. A mixo-mesohaline waters zone characterized the middle part of the lagoon. The results showed that the fish composition was dominated by marine estuarine dependent (ED) species in all three zones and in all seasons: Odontesthes argentinensis, Brevoortia aurea, Mugil liza and Micropogonias furnieri were the most representative species. The following important ecological category was freshwater fishes (FW), with Platanichthys platana and Jenynsia multidentata being the most representative species. According to the best model selected, by fitting generalized linear models, abundance of ED increased as water temperature increased during summer and autumn in all three zones. The highest abundance was recorded in the mixo-eurihaline waters zone. On the other hand, FW abundance increased with high rainfall and also when easterly winds blew. In conclusion, a differential habitat use by the species that occur in the Mar Chiquita coastal lagoon was observed. A few ED species dominated the fish composition but FW species also made use of the lagoon during periods of heavy rainfall.

scholarly journals STUDI TENTANG KEPADATAN, KELIMPAHAN DAN POLA PENYEBAR IKAN LAYUR (Trichiurus lepturus L) PADA PERAIRAN DESA PASSO TELUK BAGUALA AMBON

2015 ◽  
Vol 2 (1) ◽  
pp. 33-37
Author(s):  
Pieter Siahaya ◽  
Dominggus Rumahlatu
Keyword(s):  
Dissolved Oxygen ◽  
Distribution Pattern ◽  
Distribution Patterns ◽  
Research Station ◽  
Environmental Condition ◽  
Visual Census ◽  
Environmental Characteristics ◽  
The People ◽  
Trichiurus Lepturus ◽  
Abundance And Distribution

Background: Fish layur which is often called the people of Maluku as Fish Parang-parang is included order Perciformes in the Trchiuridae family and genus Trichiurus. The existence of fish in the waters Layur Passo not known with certainty. Methods: The study took place in October 2014. The study was divided into three locations of the research station. The method used in this study are visual census to calculate directly the large number of fish caught at the sites. Then the data were analyzed descriptively. Calculations used in the processing of the data using the formula of density, abundance, and distribution patterns. Environmental characteristics in measuring temperature, salinity, pH, and dissolved oxygen (DO). Results: The results showed that the water environmental condition Passo village is quite good for the survival of the organism. Conclusion: The density, abundance, and distribution pattern of fish layur relatively abundant in these waters with the highest value contained at two stations at the sites.

scholarly journals KEANEKARAGAMAN DAN POLA DISTRIBUSI GASTROPODA MANGROVE DI TELUK PANGPANG BLOK JATI PAPAK TN ALAS PURWO BANYUWANGI

2021 ◽  
Vol 4 (01) ◽  
pp. 33-46
Author(s):  
Lina Susanti ◽  
Fuad Ardiyansayh ◽  
Hasyim As'ari
Keyword(s):  
Distribution Pattern ◽  
Trophic Level ◽  
Mangrove Forest ◽  
National Park ◽  
Sampling Method ◽  
Random Distribution ◽  
Distribution Patterns ◽  
Purposive Sampling

The gastropods diversity have a role towards stability ecosystem in trophic level. The existence gastropods really take effect for other organism the trophic level higher than gastropods. The purpose of was to determine the value  of diverity and distribution patterns of gastropods in the mangrove forest, Jati Papak Block National Park Alas Purwo. The method used in this research is by using purposive sampling method. Sampling was divided into three stations with a range of 250 m from each station.Each station is 220 m of long and 96 m of wide with a plot measuring 2 × 2 m2. The result obtained 8 families of Gastropods with 13 genus and 19 species. Gastropods diversity ranges from H`=1.387-1.359 which indicates that the area has a moderate diversity value. The distribution pattern of gastropods between location has two distribution patterns, namely clustered and random distribution patterns

scholarly journals COMMUNITY STRUCTURE OF GASTROPOD (MOLLUSCA) IN THE MANGROVE ECOSYSTEM OF PURNAMA, DUMAI CITY RIAU PROVINCE

2020 ◽  
Vol 3 (2) ◽  
pp. 111-122
Author(s):  
Sandy Bahari ◽  
Syafruddin Nasution ◽  
Efriyeldi
Keyword(s):  
Community Structure ◽  
Distribution Pattern ◽  
Mangrove Forest ◽  
Distribution Patterns ◽  
Mangrove Ecosystem ◽  
Survey Method ◽  
Sampling Location ◽  
Anova Analysis ◽  
Gastropod Species ◽  
Transect Line

This research was conducted in January 2019 on the mangrove ecosystem of  Purnama Dumai City,  Riau Province with the aim to determine the structure of the gastropod community which includes the type, density, diversity, distribution patterns and similarity of the community. The method used is a survey method, where the sampling location consists of 5 research stations. The type and density of gatropods are determined by drawing a transect line from the mangrove forest towards the highest tide line. The transect was placed in 3 1x1 m2 maps with a distance of 10 m. The results showed that the Gastropod species found consisted of 6 species, namely Nerita costata, Telebrelia sulcata, Cicopreus capucinus, Telescopium telelescopium, Littorina sp, Volema myristican. Based on ANOVA analysis, gastropod density between stations was not significantly different in the waters of Purnama Village, Dumai City. Diversity is categorized as medium, Uniformity is categorized as balanced and the dominance of certain types. While the overall distribution pattern of Gastropods tends to be clustered.

scholarly journals Potential geographical distribution and environmental explanations of rare and endangered plant species through combined modelling: A case study of Northwest Yunnan, China

2020 ◽  
Author(s):  
Pengcheng Ye ◽  
Guangfu Zhang ◽  
Xiao Zhao ◽  
Hui Chen ◽  
Qin Si ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Distribution Pattern ◽  
Geographical Distribution ◽  
Plant Species ◽  
Ecological Niche ◽  
Potential Distribution ◽  
Distribution Patterns ◽  
Endangered Plant ◽  
Rare And Endangered ◽  
Geographical Distribution Pattern

In recent decades, due to the effect of climate change and the interference of human activities, the species habitat index fallen 2%. Studying the geographical distribution pattern and predicting the potential geographical distribution of species are of great significance for developing scientific and effective biodiversity conservation strategies. The purpose of this research is to predict the potential geographical distribution of 25 rare and endangered plant species in Northwest Yunnan, China on the grid map with a resolution of 0.05° × 0.05° and analyze the explanation capabilities of various environmental factors on the potential geographical distribution patterns of these species, and explore the main restrictive environmental factors. Initially, we employed the ecological niche model MaxEnt to predict the potential geographical distribution of target species. Following that, we overlaid the potential geographical distribution of each species, and we obtained the potential geographical distribution pattern of species richness on the spatial scale of the ecological niche model with a resolution of 0.05° × 0.05°. Ultimately, we also adopted geographically weighted regression (GWR) model to investigate the explanation capabilities of various environmental parameters on the potential distribution patterns. The results showed that the average AUC value of each species was between 0.80 and 1.00, which indicated that the simulation precision of the MaxEnt model for each species was good or excellent. Besides, the potential distribution areas of these species were between 826.33 km2 and 44,963.53 km2. In addition, the average contribution values of the annual precipitation (Bio12), precipitation of coldest quarter (Bio19) and population density (Pop) were 25.92%, 15.86% and 17.95%, respectively. Moreover, the goodness of fit R2 and AIC value of the water model were 0.88 and 7,703.82, respectively, which indicated the water factor largely influenced the potential distribution of these species. The results of this study would be helpful for implementing long-term conservation and reintroduction for these species.

Analisis Rantai Nilai Komoditas Cabai Merah

2019 ◽  
Vol 2 (1) ◽  
pp. 336-346
Author(s):  
Dhamon Oridilla B
Keyword(s):  
Distribution Pattern ◽  
Distribution Patterns ◽  
Added Value ◽  
Commodity Chain ◽  
Market Prices ◽  
Data Analyst ◽  
Bargaining Position ◽  
Agricultural Business ◽  
The Government ◽  
Red Peppers

Candi Village in Bandungan District is one of the Chili Supply Sub-district for Semarang Regency and surrounding area has agro-climate suitable for the development of various agricultural commodities supported by wide market opportunity, so it is suitable for agricultural business development. The purpose of this research is to identify the distribution pattern of red pepper, to know each value of commodity chains and distribution, to design alternative distribution pattern of red pepper.Population in this research is 88 respondents from 735 of member of chilli farmer in Desa Candi with total area of 150,3 hectare consisting of rice field, moor and yard. Methods of data analyst using quantitative approach is done by using Margin Marketing Analysis. The results include: (1) The pattern of distribution of existing farming business grows naturally in accordance with the developments and needs of the perpetrators, the actors in this pattern are farmers, wholesalers, collectors, wholesalers, retailers, consumers. (2) The value of the red chili commodity chain in this naturally grown pattern often makes pricing more dominant by traders, so farmers receive prices slightly lower than market prices. (3) Some obstacles faced in distributing red peppers are the difficulty of changing the mindset of the community about advanced farming, this is best utilized by market participants (chain of distribution) who are more informed and always keep abreast of market dynamics. Conventional marketing pattern by farmer cause price level accepted by farmer in general relatively smaller compared to price received by trader. Suggestions shorten the chain of distribution patterns, increase the added value of products and improve the bargaining position of farmers and for the government always guide / accompany farmers in getting accurate market information, which can be used as farmers in bargaining, Increased market transparency can act as a trigger for the functioning of a market, improved competition and increased adaptation to meet the needs of supply and opportunity to compete with market prices. Desa Candi di Kabupaten Bandungan adalah salah satu Kecamatan Penyedia Cabai untuk Kabupaten Semarang dan sekitarnya memiliki agroklimat yang cocok untuk pengembangan berbagai komoditas pertanian yang didukung oleh peluang pasar yang luas, sehingga sangat cocok untuk pengembangan bisnis pertanian. Tujuan dari penelitian ini adalah untuk mengidentifikasi pola distribusi cabai merah, untuk mengetahui masing-masing nilai rantai komoditas dan distribusi, untuk merancang alternatif pola distribusi cabai merah. Populasi dalam penelitian ini adalah 88 responden dari 735 anggota petani cabai di Desa Candi dengan total luas 150,3 hektar yang terdiri dari sawah, tegalan dan pekarangan. Metode analis data menggunakan pendekatan kuantitatif dilakukan dengan menggunakan Analisis Pemasaran Margin. Hasil meliputi: (1) Pola distribusi usaha pertanian yang ada tumbuh secara alami sesuai dengan perkembangan dan kebutuhan pelaku, pelaku dalam pola ini adalah petani, pedagang besar, pengumpul, pedagang besar, pedagang besar, pengecer, konsumen. (2) Nilai rantai komoditas cabai merah dalam pola yang dikembangkan secara alami ini sering membuat penetapan harga lebih dominan oleh para pedagang, sehingga petani menerima harga yang sedikit lebih rendah daripada harga pasar. (3) Beberapa kendala yang dihadapi dalam mendistribusikan paprika merah adalah sulitnya mengubah pola pikir masyarakat tentang pertanian maju, hal ini paling baik digunakan oleh pelaku pasar (rantai distribusi) yang lebih banyak informasi dan selalu mengikuti perkembangan dinamika pasar. Pola pemasaran konvensional oleh petani menyebabkan tingkat harga yang diterima petani pada umumnya relatif lebih kecil dibandingkan dengan harga yang diterima pedagang. Saran mempersingkat rantai pola distribusi, meningkatkan nilai tambah produk dan meningkatkan posisi tawar petani dan bagi pemerintah selalu membimbing / menemani petani dalam mendapatkan informasi pasar yang akurat, yang dapat digunakan sebagai petani dalam tawar-menawar, Peningkatan transparansi pasar dapat bertindak sebagai pemicu berfungsinya pasar, meningkatnya kompetisi dan peningkatan adaptasi untuk memenuhi kebutuhan pasokan dan peluang untuk bersaing dengan harga pasar.

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