scholarly journals KAJIAN FAKTOR LINGKUNGAN DAN IDENTIFIKASI FILUM MOLLUSCA, FILUM ECHINODERMATA DI EKOSISTEM PADANG LAMUN PERAIRAN PANTAI NEGERI TULEHU KABUPATEN MALUKU TENGAH

2015 ◽  
Vol 1 (2) ◽  
pp. 117-125
Author(s):  
Stevin Melay ◽  
P Tuapattinaya ◽  
Fatimah Sangadji
Keyword(s):  
Environmental Factors ◽  
Coastal Waters ◽  
Sea Urchins ◽  
Coastal Region ◽  
Environmental Research ◽  
Physical Factors ◽  
Research Station ◽  
Seagrass Ecosystems ◽  
Mollusk Species ◽  
Diadema Setosum

Background: Bodies of State Tulehu a coastal region that has seagrass which adjoins the living marine resources such as mangroves, algae, molluscs, and others. Seagrass in the coastal waters of State Tulehu has spread widely. Information about environmental factors in seagrass ecosystems is still limited that affect its structure. Therefore, to investigate environmental factors and identify the types of phyla phylum molluscs and echinoderms in coastal waters Tulehu village. Methods: The study was conducted in August 2014 by using the quadrant method by using purposive sampling. Hasil environmental research shows physical factors (temperature, pH, salinity, and dissolved oxygen) varies in each quadrant with the results of the identification of Echinodermata and mollusk species also varies. Results: The second research station results obtained 4 types of echinoderms which 1 represents the class Asteroidea species, one species representing Ophiuroidea class, and two types represent the class Echinoidea. On this study, 4 types of echinoderms are divided into three classes, namely class Asteroidea, class Ophiuturoidea, and this Echinoidea. Next class described the types of echinoderms are found on both the research station is Archaster typicus, Ophiocoma erinaceus, Diadema setosum and Laganum depressum. From 3 classes found in both types of Archaster typicus research stations which are found because berhabitat sandy. Conclusion: In the second research station found found four species of the phylum of echinoderms were included in three classes, namely class Echinoidea (sea urchins) are represented by two types, class Asteroidea (starfish) represented by one type and class Ophiuroidea (brittle stars) represented one kind, moreover, In the second research station also found 19 Type molluscs which consists of two types of class Bivalvia and 17 species of the class Gastropoda.

scholarly journals Species density and shell morphology of gold ring cowry (Monetaria annulus, Linnaeus, 1758) (Mollusca: Gastropoda: Cypraeidae) in the coastal waters of Ambon Island, Indonesia

2020 ◽  
Vol 21 (4) ◽  
Author(s):  
LOUVENSKA N. LATUPEIRISSA ◽  
FREDY LEIWAKABESSY ◽  
Dominggus - Rumahlatu
Keyword(s):  
Environmental Factors ◽  
Coastal Waters ◽  
Seawater Temperature ◽  
Shell Morphology ◽  
Species Density ◽  
Line Transect ◽  
Research Station ◽  
Sea Waves ◽  
As Species

Abstract. Latupeirissa LN, Leiwakabessy F, Rumahlatu D. 2020. Species density and shell morphology of gold ring cowry (Monetaria annulus, Linnaeus, 1758) (Mollusca: Gastropoda: Cypraeidae) in the coastal waters of Ambon Island, Indonesia. Biodiversitas 21: 1391-1400. The purpose of this research was to examine environmental factors, species density, and the shell morphology of Monetaria annulus. The samples were collected by using the line transect method at 6 research stations. The data of the environmental factors (temperature, salinity, and pH of seawater) as well as species density of M. annulus were collected with in-situ technique, while the shell morphology of M. annulus was measured at Laboratory of the Deep-Sea Research Center, Indonesian Institute of Sciences (LIPI) Ambon. The results of the measurements of the environmental factors in the coastal waters of Ambon Island showed some fluctuations in the measurement values. The seawater temperature ranged between 29.78-30.05 ºC, the salinity of seawater ranged from 32.12-32.33‰, and the pH of the seawater ranged from 8.34-8.49. The density of M. annulus at the research stations from the highest to the lowest was at Tanjung Tiram station, Suli station, Seri station, Hutumuri station, Halong station, and Latuhalat station (0.27 > 0.24 > 0.23 > 0.19 > 0.14 > 0.12 ind/m2). The results of the measurement of the shell morphology showed many variations in the size and shape of the shell of M. annulus with a total number (N) of 294 individuals. The length, the width, and the height of the shell, the length of the blotches, the width of the blotches, and the total weight of M. annulus from each research station were significantly different (p<0.005). These results indicate that the differences in the shell morphology of M. annulus at each research station were influenced by waves, the strength of the currents sea waves, and the different substrate of water. In addition, the variation of shell morphology can be a reason for characterization in the taxonomy of the Cypraeidae family.

scholarly journals KEANEKARAGAMAN JENIS DAN KEPADATAN GASTROPODA DI BERBAGAI SUBSTRAT BERKARANG DI PERAIRAN PANTAI TIHUNITU KECAMATAN PULAU HARUKU KABUPATEN MALUKU TENGAH

2019 ◽  
Vol 5 (1) ◽  
pp. 45-52
Author(s):  
Marlen Persulessy ◽  
Ine Arini
Keyword(s):  
Environmental Factors ◽  
Coastal Waters ◽  
Ph Value ◽  
Research Station ◽  
Marine Biota ◽  
Average Value ◽  
The Pacific ◽  
Very High ◽  
Substrate Types ◽  
High Diversity

Background: Indonesia has a very high diversity of flora and fauna, including various marine biota. The diversity of marine biota varies greatly and can represent all phyla in the Pacific region of Indonesia. The purpose of this study was to determine the environmental factors, the value of diversity and the density of gastropods in the coastal waters of Tihunitu. Methods: This study was conducted on July 19, 2018. The type of research used is a descriptive type of research to see the value of diversity and density. Results: The measurement of environmental factors shows that the temperature values ​​on transect I range from 26.5-28, ° C. The second transect ranged from 27.1-29.7, ° C. The transect III ranges from 28.0-29.8, ° C. The PH value on transect I ranges from 7.4-74. The transect II ranges from 7.2-7.4. The transect III ranges from 7-7.3. The salinity value on transect I ranged from 24-34 (‰). The transect II ranges from 26-39 (‰). The transect III ranges from 25-29 (‰). The value of dissolved oxygen on transect I ranged from 7.3 to 8.3 mg / 1. On transect II ranged from 6.9-723 mg / 1. The transect III ranges from 7.1-7.2 mg / 1. While the results of determining the type of substrate visually descriptive showed that Tihun Beach has 2 types of substrate types, namely sandy and rocky. Conclusion: Gastropods found in Tihun coastal waters are 37 species representing 14 families in the phylum of molluscs. With the average value of diversity in the research station is classified as moderate, namely 3,448.6. The highest density value is 0.108 and the lowest density value is 0.01

scholarly journals Are Bacterio- and Phytoplankton Community Compositions Related in Lakes Differing in Their Cyanobacteria Contribution and Physico-Chemical Properties?

Genes ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 855
Author(s):  
Mikołaj Kokociński ◽  
Dariusz Dziga ◽  
Adam Antosiak ◽  
Janne Soininen
Keyword(s):  
Environmental Factors ◽  
Community Composition ◽  
Phytoplankton Community ◽  
Heterotrophic Bacteria ◽  
Bacterial Community Composition ◽  
Physical Factors ◽  
Research Attention ◽  
Phytoplankton Community Composition ◽  
The Impact ◽  
Bacteria Communities

Bacterioplankton community composition has become the center of research attention in recent years. Bacteria associated with toxic cyanobacteria blooms have attracted considerable interest. However, little is known about the environmental factors driving the bacteria community, including the impact of invasive cyanobacteria. Therefore, our aim has been to determine the relationships between heterotrophic bacteria and phytoplankton community composition across 24 Polish lakes with different contributions of cyanobacteria including the invasive species Raphidiopsis raciborskii. This analysis revealed that cyanobacteria were present in 16 lakes, while R. raciborskii occurred in 14 lakes. Our results show that bacteria communities differed between lakes dominated by cyanobacteria and lakes with minor contributions of cyanobacteria but did not differ between lakes with R. raciborskii and other lakes. Physical factors, including water and Secchi depth, were the major drivers of bacteria and phytoplankton community composition. However, in lakes dominated by cyanobacteria, bacterial community composition was also influenced by biotic factors such as the amount of R. raciborskii, chlorophyll-a and total phytoplankton biomass. Thus, our study provides novel evidence on the influence of environmental factors and R. raciborskii on lake bacteria communities.

scholarly journals STRUKTUR KOMUNITAS DAN ASOSIASI LAMUN (Seagrass) DI PERAIRAN PANTAI RUA PULAU TERNATE PROVINSI MALUKU UTARA

2013 ◽  
Vol 13 (1) ◽  
Author(s):  
Riyadi Subur
Keyword(s):  
Coastal Waters ◽  
Coastal Region ◽  
Positive Association ◽  
Distribution Patterns ◽  
Research Area ◽  
Negative Association ◽  
Line Transect ◽  
Thalassia Hemprichii ◽  
Marine Life ◽  
Cymodocea Rotundata

AbstrakLamun (Seagrass) merupakan salah satu ekosistem penting diwilayah pesisir yangberperan penting baik secara ekologis dan ekonomis. Keberadaan lamun mendukungkehidupan berbagai jenis biota laut. Penelitian ini bertujuan mengidentifikasi jenis-jenislamun yang berada di perairan pantai Rua, Mengetahui kepadatan, pola sebaran,keanekaragaman jenis, dan dominansi serta asosiasi antara spesies. Penelitian ini dilakukandengan metode garis transek dan kuadrat. Hasil penelitian menunjukkan bahwa terdapat 4jenis lamun di perairan pantai Rua yang terdiri dari Cymodocea rotundata, Enhalusacoroides, Halodule pinifolia dan Thalassia hemprichii. T. hemprichii adalah jenis dengankepadatan tertinggi di perairan Rua yaitu 16,70 ind/m2, serta E. acoroides, memilikikepadatan terendah yakni 5,77 ind/m2. Jenis lamun yang ditemukan di lokasi penelitianseluruhnya memiliki pola sebaran mengelompok dengan keanekaragaman yangdikategorikan rendah yaitu sebesar 1,32, serta indeks dominasi sebesar 0,27. Tipe asosiasilamun di lokasi penelitian yaitu asosiasi positif (+), serta asosiasi negatif (-).Kata Kunci. Struktur Komunitas, Asosiasi, lamun.AbstractSeagrass is a important ecosystems coastal region that is important both ecologically andeconomically . The seagrass supports of various marine life. This study to propose identify thespecies of seagrasses in coastal waters in Rua, Knowing the density, distribution pattern,species diversity, and dominance as well as associations between species. This study wasconducted using line transect and kuadrats. The results showed that there are 4 species ofseagrass in Rua consisting of Cymodocea rotundata , Enhalus acoroides , pinifolia Haloduleand Thalassia hemprichii . T. hemprichii is highest density (16.70 ind/m2), and E. acoroides ,which has the lowest density (5.77 ind/m2). Species seagrass found in the research area allhave clumped distribution patterns are categorized with diversity low at 1.32 , and dominanceindex at 0.27. Type association of seagrass in the location studies is positive association ( + )and negative association ( - ).Key Words:community structur, association, seagrass

scholarly journals Potensi Simpanan Karbon Pada Lamun Cymodocea serrulata Di Pantai Prawean, Jepara

2019 ◽  
Vol 8 (1) ◽  
pp. 19-26
Author(s):  
Tiara Nur Baeti Baeti ◽  
Retno Hartati Hartati ◽  
Ita Riniatsih Riniatsih
Keyword(s):  
Global Warming ◽  
Observation Time ◽  
Blue Carbon ◽  
Total Carbon ◽  
Anthropogenic Factors ◽  
Physical Factors ◽  
Carbon Deposits ◽  
Seagrass Ecosystems ◽  
Below Ground ◽  
Cymodocea Serrulata

Pemanasan global merupakan akibat dari peningkatan gas-gas rumah kaca (GRK), seperti halnya gas karbondioksida, metana, nitro dioksida, maupun gas alam lainnya. Ekosistem padang lamun di perairan Pantai Prawean, Kabupaten Jepara memiliki fungsi ekologis yang sangat penting sebagai penyangga ekosistem lain di perairan tersebut. Potensi padang lamun diantaraanya adalah sebagai penyimpan emisi karbon, sehingga mampu mencegah terjadinya pemanasan global (global warming) atau biasa disebut sebagai blue carbon. Tujuan penelitian ini adalah untuk menentukan potensi simpanan karbon pada lamun jenis Cymodocea serrulata di perairan Pantai Prawean, Kabupaten Jepara. Penelitian ini dilakukan pada bulan Desember 2018 dan Maret 2019 dengan metode pengukuran karbon pada lamun Loss of Ignition (LOI). Hasil penelitian menunjukkan bahwa biomassa terbesar terletak pada bagian Below Ground (akar dan rhizoma) dengan persentase di atas 50% pada kedua waktu pengamatan bila dibandingkan dengan jaringan lamun di atas substrat (daun). Rata-rata kandungan karbon tertinggi pada kedua waktu penelitain terletak pada bagian akar lamun dengan persentase nilai simpanan karbon mencapai 55 – 57%. Terjadi penurunan nilai simpanan karbon dalam dua kali pengambilan data, yakni pada bulan Desember 2018 total simpanan karbon pada lamun Cymodocea serrulata mencapai 6,77 ton sedangkan pada bulan Maret 2019 nilainya turun menjadi 5,38 ton. Penurunan total simpanan karbon pada lamun ini di duga diakibatkan oleh adanya perubahan faktor fisik perairan serta adanya faktor antropogenik di wilayah perairan tersebut.Global warming is a result of increasing greenhouse gases (GHG), such as carbon dioxide, methane, nitrous dioxide, and other natural gas. Seagrass ecosystems in the waters of Prawean Beach, Jepara Regency have very important ecological functions as a buffer for other ecosystems in these waters. The potential of seagrass bed is as a store of carbon emissions, so as to prevent global warming or commonly referred to as blue carbon. The purpose of this research is to determine the potention of carbon deposits in seagrass species of Cymodocea serrulata in the waters of Prawean Beach, Jepara Regency. This research was conducted in December 2018 and March 2019 with the method of carbon measurement in seagrass Loss of Ignition (LOI). The results showed that the largest biomass was located in the Below Ground (roots and rhizomes) with a percentage above 50% at both observation time when compared to seagrass tissue on the substrate (leaves). The highest average carbon content at both time of the survey was located in the seagrass root section with a percentage of the value of carbon deposits reaching 55 - 57%. There was a decrease in the value of carbon deposits in two data collection, namely in December 2018 the total carbon deposits in seagrass Cymodocea serrulata reached 6,77 tons while in March 2019 the value dropped to 5,38 tons. The decrease in total carbon deposits in seagrasses is thought to be caused by changes in physical factors of the waters and the presence of anthropogenic factors in these waters.

scholarly journals Influence of Seasonal Environmental Variables on the Distribution of Presumptive Fecal Coliforms around an Antarctic Research Station

2003 ◽  
Vol 69 (8) ◽  
pp. 4884-4891 ◽  
Author(s):  
Kevin A. Hughes
Keyword(s):  
Environmental Factors ◽  
Solar Radiation ◽  
Sea Ice ◽  
Fecal Coliform ◽  
Algal Blooms ◽  
Austral Summer ◽  
Fecal Coliforms ◽  
Late Winter ◽  
Research Station ◽  
The Antarctic

ABSTRACT Factors affecting fecal microorganism survival and distribution in the Antarctic marine environment include solar radiation, water salinity, temperature, sea ice conditions, and fecal input by humans and local wildlife populations. This study assessed the influence of these factors on the distribution of presumptive fecal coliforms around Rothera Point, Adelaide Island, Antarctic Peninsula during the austral summer and winter of February 1999 to September 1999. Each factor had a different degree of influence depending on the time of year. In summer (February), although the station population was high, presumptive fecal coliform concentrations were low, probably due to the biologically damaging effects of solar radiation. However, summer algal blooms reduced penetration of solar radiation into the water column. By early winter (April), fecal coliform concentrations were high, due to increased fecal input by migrant wildlife, while solar radiation doses were low. By late winter (September), fecal coliform concentrations were high near the station sewage outfall, as sea ice formation limited solar radiation penetration into the sea and prevented wind-driven water circulation near the outfall. During this study, environmental factors masked the effect of station population numbers on sewage plume size. If sewage production increases throughout the Antarctic, environmental factors may become less significant and effective sewage waste management will become increasingly important. These findings highlight the need for year-round monitoring of fecal coliform distribution in Antarctic waters near research stations to produce realistic evaluations of sewage pollution persistence and dispersal.

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