scholarly journals HUBUNGAN KEPADATAN TERIPANG (HOLOTHUROIDEA) DENGAN KERAPATAN LAMUN DI PERAIRAN PULAU BUNTAL-TELUK KOTANIA, KABUPATEN SERAM BAGIAN BARAT

2020 ◽  
Vol 16 (2) ◽  
pp. 84-96
Author(s):  
Salahuddin Bachmid ◽  
Laura Siahainenia ◽  
Charlotha I Tupan
Keyword(s):  
Spatial Distribution ◽  
Community Structure ◽  
Sea Cucumber ◽  
Pearson Correlation ◽  
Linear Regression Analysis ◽  
Environmental Parameters ◽  
Health Condition ◽  
Thalassia Hemprichii ◽  
Seagrass Ecosystem ◽  
Seagrass Cover

Buntal island has rich potency of both seagrass and sea cucumber. Seagrass ecosystem is the habitat of one among the economic valued biota, sea cucumber. The purpose of the research are: 1) to know the environmental condition; 2) to know the seagrass condition; 3) to know the community structure of the sea cucumber; 4) to know the spatial distribution of sea cucumber in the seagrass ecosystem; and 5) to analyze the relation of  the density of sea cucumber  and the density of seagrass in the waters of Buntal island-Kotania Bay, West Seram Regency. The sample are taken systematically using Belt Transect. The research is located in 2 observation stations where each station is determines into 3 zones. Seagrass condition is analyzed consist of density, frequency of presence and percentage of seagrass cover. The community structure of sea cucumber includes the density and frequency of presence. Spatial distribution mapping on the sea grass ecosystem is using ArcGIS application. The simple linear regression analysis and Pearson correlation are used to analyze the relation between the density of the sea cucumber and the density of the seagrass. The result of the research shows that the whole environmental parameters on the waters of Buntal Island support the existence of both the seagrass and the sea cucumber. The research finds 5 varieties of seagrass and 11 varieties of sea cucumber. Thalassia hemprichii is the seagrass variety that dominates the ecosystem while Holothuria leucospilota and H. atra are the varieties of sea cucumber with high density on Buntal Island waters. The healthy seagrass condition (well covered) is found in station 1 and bad health condition (worse covered) is found in station 2. The relation between the density of sea cucumber and the density of seagrass on the waters of Buntal Island, it is concludes that there is a high relation where the higher the density of seagrass the higher the density of the sea cucumber.   ABSTRAK Pulau buntal memiliki potensi sumberdaya lamun maupun teripang yang melimpah. Ekosistem lamun sebagai habitat bagi sumberdaya teripang yang merupakan salah satu biota berekonomis penting. Tujuan dari penelitian ini adalah: 1) mengetahui kondisi lingkungan; 2) mengetahui kondisi lamun; 3) mengetahui struktur komunitas teripang; 4) mengetahui distribusi spasial teripang pada ekosistem lamun; 5) menganalisis hubungan kepadatan teripang dengan kerapatan lamun di perairan Pulau Buntal-Teluk Kotania, Kabupaten Seram Bagian Barat. Pengambilan sampel lamun dan teripang dilakukan secara sistematik menggunakan metode Belt Transek. Lokasi penelitian  terdiri dari 2 stasiun pengamatan dan setiap stasiun terbagi menjadi 3 zona. Kondisi lamun yang dianalisis meliputi kerapatan, frekuensi kehadiran dan persentase tutupan lamun. Struktur komunitas teripang meliputi kepadatan dan frekuensi kehadiran. Peta distribusi spasial teripang pada ekosistem lamun menggunakan aplikasi ArcGIS. Analisis regresi linear sederhana dan korelasi pearson untuk melihat pengaruh serta hubungan kepadatan teripang dengan kerapatan lamun. Berdasarkan hasil penelitian menunjukan bahwa sacara keseluruhan parameter lingkungan di perairan Pulau Buntal sangat mendukung untuk kehidupan sumberdaya lamun maupun teripang. Ditemukannya lima jenis lamun dan 11 jenis teripang. Thalassia hemprichii merupakan jenis lamun yang sangat mendominasi pada komunitas lamun di perairan Pulau buntal. Jenis teripang Holothuria leucospilota dan H. atra memiliki nilai kepadatan yang tinggi pada perairan pulau Buntal. Dengan kondisi lamun sehat (tutupan baik) pada stasiun 1 dan tidak sehat (tutupan rusak) pada stasiun 2. Hubungan kepadatan teripang dengan kerapatan lamun pada Perairan Pulau Buntal dapat disimpulkan terdapat hubungan yang tinggi sehingga semakin tinggi kerapatan lamun akan diikuti oleh tingginya kepadatan teripang.   Kata Kunci: Lamun, teripang, kepadatan, ekosistem lamun, Pulau Buntal

scholarly journals Community structure and condition of seagrass meadows in Ayau Islands, Raja Ampat Regency

2020 ◽  
Vol 45 (1) ◽  
pp. 13-24
Author(s):  
Andri Irawan ◽  
Muhammad Hafizt ◽  
Udhi Eko Hernawan
Keyword(s):  
Community Structure ◽  
Environmental Parameters ◽  
Water Clarity ◽  
Well Being ◽  
Common Species ◽  
Thalassia Hemprichii ◽  
Seagrass Meadows ◽  
Halophila Ovalis ◽  
Seagrass Cover ◽  
Baseline Information

Seagrass meadows are an important component of coastal ecosystems, providing many ecosystem services beneficial for human well-being. Basic information about seagrass meadows in Indonesia is relatively limited, particularly in the eastern part of Indonesia, such as the remote Ayau Islands in Raja Ampat. In this paper, we reported the community structure and condition of seagrass meadows in Ayau Islands surveyed during Nusa Manggala Expedition in November 2018. We conducted the seagrass survey using quadrat transect method at five locations, i.e. Reni, Rutum, Abidon, Kanober, and Dorehkar. In the survey, we assessed parameters of community structure, including habitat extent, species composition, seagrass cover, seagrass density, macroalgae and epiphyte cover. We also recorded environmental parameters, i.e. substrate types, water clarity, salinity, water temperature, and nutrient (phosphate and nitrate). Our study showed that seagrass meadows in Ayau Islands are multispecies meadows, composed of two to five species. In overall, five species recorded in Ayau Islands are Cymodocea rotundata, Enhalus acoroides, Halodule pinifolia, Halophila ovalis, and Thalassia hemprichii. The most common species is T. hemprichii as it can be found in all locations. Meadows in Reni, Rutum, and Dorehkar are in a healthy condition, while in Abidon and Kanober are in less healthy condition. This information is of significance as baseline information needed for seagrass conservation planning.

DENSITY AND THE COVERAGE OF SEAGRASS ECOSYSTEM IN BAHOI VILLAGE COASTAL WATERS, NOTRH SULAWESI

2017 ◽  
Vol 9 (1) ◽  
pp. 375-383 ◽  
Author(s):  
Muh. Fahruddin ◽  
Fredinan Yulianda ◽  
Isdradjad Setyobudiandi
Keyword(s):  
Coastal Waters ◽  
Seagrass Species ◽  
Reef Habitat ◽  
Thalassia Hemprichii ◽  
Halophila Ovalis ◽  
Seagrass Ecosystem ◽  
Seagrass Cover ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium ◽  
Coral Reef Habitat

Physical seagrass ecosystem damage have been reported in various regions in Indonesia. Seagrass ecosystem damage is caused by human activity such as trampling seagrass and boats that muddy the waters and reduced the density and seagrass cover. This study aims to provide information about the density and the coverage of seagrass. The method used in this research is the transect method measuring 50x50 cm squared at three different locations by considering coastal ecosystems Bahoi village that already exist. Station 1 is near to mangrove habitat, station 2 is right on seagrass habitats, and station 3 is near to coral reef habitat. The results indicated there is six seagrass species that found in the Bahoi village which is Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Syringodium isoetifolium, Halophila ovalis, and Halodule uninervis. The density and seagrass cover is shows that the station 1 has the highest density and seagrass cover percentage compared with the other stations. The highest density of seagrass species located in station 1 with 955 individuals/m2, and the lowest was located at station 3 with 699 individuals/m2. While the highest cover percentage is located at station 1 with 270% and the lowest located at station 3 with 229%. Keyword: seagrass ecosystem, density, coverage, Bahoi

scholarly journals STRUKTUR KOMUNITAS LAMUN DI MALANG RAPAT, BINTAN

2019 ◽  
Vol 4 (2) ◽  
pp. 148-159
Author(s):  
Wahyu Adi ◽  
Aditya Hikmat Nugraha ◽  
Yehiel Hendry Dasmasela ◽  
Agus Ramli ◽  
Calvyn Fredrik Aldus Sondak ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Line Transect ◽  
Percent Cover ◽  
Seagrass Beds ◽  
Seagrass Species ◽  
Substrate Type ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Present Information ◽  
Seagrass Cover

Padang lamun menyediakan banyak manfaat. Diperlukan penilaian tutupan lamun dan distribusi spasial spesies lamun, untuk memastikan manfaat dari padang lamun tetap ada. Penelitian ini dilakukan dengan metode kuadran disepanjang line transect, dan analisis data dilakukan untuk dapat menyajikan informasi tentang titik koordinat transek garis, persen tutupan lamun, persen tutupan spesies lamun, jenis substrat (pasir, lumpur dan pecahan karang), jumlah spesies Enhallus acoroides (tegakan/m2) dan distribusi spasial spesies lamun. Hasil penelitian menunjukkan kondisi padang lamun di wilayah studi sebagai kategori tutupan padat. Spesies lamun Thalassia hemprichii (Th) dan Enhalus acoroides (Ea) adalah spesies dominan dan menyebar ke seluruh wilayah penelitian.COMMUNITY STRUCTURE OF SEAGRASS IN MALANG RAPAT, BINTAN. Seagrass beds provide many benefits. Assessment of seagrass cover and spatial distribution of seagrass species is needed, to ensure the benefits of seagrass beds remain. The study was conducted using the quadratic method on the line transect, and the analysis was carried out to be able to present information about line transect coordinate points, percent cover of seagrass, percent cover of seagrass species, substrate type (sand, mud and rubble), number of species of Enhallus acoroides (shoot/m2) and spatial distribution of seagrass species. The results showed the condition of seagrass beds in the study area as a category of solid cover. Seagrass species Thalassia hemprichii (Th) and Enhalus acoroides (Ea) are dominant species and spread throughout the study area.

scholarly journals Pengelolaan Ekosistem Lamun untuk Keberlanjutan Populasi Kuda Laut di Desa Sebong Pereh, Kabupaten Bintan

2020 ◽  
Vol 25 (3) ◽  
pp. 405-411
Author(s):  
Rizqan Khairan Munandar ◽  
Sulistiono Sulistiono ◽  
Isdrajad Setyobudiandi
Keyword(s):  
Swot Analysis ◽  
Management Strategies ◽  
Environmental Parameters ◽  
Sampling Technique ◽  
Research Station ◽  
Thalassia Hemprichii ◽  
Sustainable Resources ◽  
Halophila Ovalis ◽  
Seagrass Ecosystem ◽  
Seagrass Ecosystems

This research is about studying ecosystems that was designed to analyze the relationship between seagrass ecosystem, environmental competition, and seahorse participation to analyze the distribution of seagrass ecosystems and the abundance of sea horses, and to analyze seahorse-based ecosystem management strategies. This research was conducted in March–June 2017. The determination of the research station was based on purposive sampling technique. Retrieval of seagrass ecosystem data was conducted using a quadrant with the size of 50 x 50 cm transect. Seahorse data were collected using visual census on seagrass transect with a plot of 100 x 100 cm. The relationships between environmental parameters, seagrass ecosystems, and seahorses were calculated using XL Starting 2015. Management of seagrass ecosystems was analyzed using SWOT. Analysis of seagrass included type, density, and INP. Seahorse analysis calculated the abundance of seahorse. The results found 6 species of seagrasses, namely Enhalus acoraides (Ea), Thalassia hemprichii (Th), Halophila ovalis (Ho), Syringodium isoetifolium (Si), Cymodocea serrulata (Cs), and Thalassodendron ciliatum (Tc) with a density that covered sea horse  abundance, and INP which had several types of roles in the research location. The management is carried out with the objectives of sustainable resources.   Keywords: seagrass ecosystem, seahorse, Sebong Pereh Village

scholarly journals Studi Struktur Komunitas Padang Lamun Di Pulau Parang, Kepulauan Karimunjawa

2019 ◽  
Vol 8 (1) ◽  
pp. 107-116
Author(s):  
Amin Nur Kolis Rela Hidayah ◽  
Raden Ario ◽  
Ita Riniatsih
Keyword(s):  
Random Sampling ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Seagrass Community ◽  
Halophila Ovalis ◽  
A Value ◽  
Seagrass Ecosystem ◽  
Seagrass Cover ◽  
Cymodocea Rotundata ◽  
Important Value Index

Struktur komunitas lamun merupakan suatu konsep yang harus diketahui untuk mengetahui kondisi ekosistem perairan tersebut. Padang lamun memiliki peran penting dalam kehidupan yang ada dibawah laut dangkal, sehingga ekosistem padang lamun perlu untuk dijaga kelestariannya agar keberlangsungan produktivitas di ekosistem tersebut tetap seimbang. Tujuan penelitian ini adalah menghitung dan menganalisis komposisi jenis, kerapatan serta persen tutupan lamun, mengetahui indeks ekologi lamun seperti keanekaragaman, keseragaman, dominansi dan mengetahui indeks nilai penting lamun di Pulau Parang. Penelitian dilakukan pada bulan Agustus sampai September 2017. Metode penelitian menggunakan metode deskriptif, terdapat 2 lokasi (A dan B) dengan 3 stasiun disetiap lokasinya. Penentuan lokasi dengan metode purposive random sampling. Pada saat penelitian, setiap stasiun menggunakan transek kuadran ukuran 1 x 1 m pada hamparan lamun. Transek ini dibagi menjadi 16 buah kisi ukuran 25 cm2. Jumlah tegakan diamati langsung secara visual. Hasil penelitian menunjukkan 4 jenis lamun, yaitu Enhalus acoroides, Halophila ovalis, Cymodocea rotundata dan Thalassia hemprichii. Kisaran kerapatan lamun yang ditemukan 5–219 tegakan/m2. Rata–rata persen tutupan lamun menunjukkan nilai 17,61% (Lokasi A) dan 19,24% (Lokasi B). Indeks Nilai Penting menunjukkan Cymodocea rotundata berperan penting dalam kondisi ekosistem perairan di lokasi A dan B . Indeks ekologi lamun menunjukkan bahwa nilai keanekaragaman tergolong sedang di Lokasi A dan rendah di Lokasi B, sedangkan nilai keseragaman tergolong tinggi di Lokasi A dan sedang di Lokasi B dan nilai dominansi tergolong sedang di Lokasi A dan tinggi di Lokasi B. The seagrass community structure is the concept that must be known to determine the condition of the aquatic ecosystem. Due to the fact thar seagrass beds have an important role in life under the shallow sea, the seagrass ecosystem needs to be preserved so that the sustainability of productivity in the ecosystem remains balanced. The purpose of this study was to calculate and analyze the species composition, density and the precentage of seagrass cover, to know the index of seagrass ecology such as diversity, uniformity, dominance and to know the important value index of seagrass in Parang Island. The study was conducted from August to September 2017. The research method used a descriptive method, there were 2 locations (A and B) with 3 stations in each location. The determination of location was done by doing a purposive random sampling method. During the research, each station used a 1 x 1 m quadrant transect on a seagrass bed. This transect was divided into 16 lattice sizes of 25 cm2. The number of stands was observed visually. The results of this research showed that there were 4 types of seagrass, such as Enhalus acoroides, Halophila ovalis, Cymodocea rotundata and Thalassia hemprichii. The seagrass density that found was 5–219 stands / m2. The percentage of seagrass cover showed a value of 17.61% (Location A) and 19.24% (Location B). Important Value Index showed that Cymodocea rotundata plays an important role in the condition of aquatic ecosystems in locations A and B. The seagrass ecology index showed that the diversity value is classified as medium in Location A and low in Location B. Uniformity values are high in Location A and medium in Location B and dominance values are medium in Location A and high in Location B. 

scholarly journals DENSITY AND THE COVERAGE OF SEAGRASS ECOSYSTEM IN BAHOI VILLAGE COASTAL WATERS, NOTRH SULAWESI

2017 ◽  
Vol 9 (1) ◽  
pp. 375
Author(s):  
Muh. Fahruddin ◽  
Fredinan Yulianda ◽  
Isdradjad Setyobudiandi
Keyword(s):  
Coastal Waters ◽  
Seagrass Species ◽  
Reef Habitat ◽  
Thalassia Hemprichii ◽  
Halophila Ovalis ◽  
Seagrass Ecosystem ◽  
Seagrass Cover ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium ◽  
Coral Reef Habitat

<p><em>Physical seagrass ecosystem damage have been reported in various regions in Indonesia. Seagrass ecosystem damage is caused by human activity such as trampling seagrass and boats that muddy the waters and reduced the density and seagrass cover. This study aims to provide information about the density and the coverage of seagrass. The method used in this research is the transect method measuring 50x50 cm squared at three different locations by considering coastal ecosystems Bahoi village that already exist. Station 1 is near to mangrove habitat, station 2 is right on seagrass habitats, and station 3 is near to coral reef habitat. The results indicated there is six seagrass species that found in the Bahoi village which is Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Syringodium isoetifolium, Halophila ovalis, and Halodule uninervis. The density and seagrass cover is shows that the station 1 has the highest density and seagrass cover percentage compared with the other stations. The highest density of seagrass species located in station 1 with 955 individuals/m<sup>2</sup>, and the lowest was located at station 3 with 699 individuals/m<sup>2</sup>. While the highest cover percentage is located at station 1 with 270% and the lowest located at station 3 with 229%.</em></p><p><em> </em></p><p><strong><em>Keyword: </em></strong><em>seagrass ecosystem, density, coverage, Bahoi</em></p>

scholarly journals Micro-Landscape Dependent Changes in Arbuscular Mycorrhizal Fungal Community Structure

2021 ◽  
Vol 11 (11) ◽  
pp. 5297
Author(s):  
Stavros D. Veresoglou ◽  
Leonie Grünfeld ◽  
Magkdi Mola
Keyword(s):  
Community Structure ◽  
Mycorrhizal Fungi ◽  
Root Colonization ◽  
Environmental Parameters ◽  
Arbuscular Mycorrhizal ◽  
Fungal Community Structure ◽  
High Connectivity ◽  
Spatio Temporal ◽  
Arbuscular Mycorrhizal Fungal ◽  
Colonization Rates

The roots of most plants host diverse assemblages of arbuscular mycorrhizal fungi (AMF), which benefit the plant hosts in diverse ways. Even though we understand that such AMF assemblages are non-random, we do not fully appreciate whether and how environmental settings can make them more or less predictable in time and space. Here we present results from three controlled experiments, where we manipulated two environmental parameters, habitat connectance and habitat quality, to address the degree to which plant roots in archipelagos of high connectivity and invariable habitats are colonized with (i) less diverse and (ii) easier to predict AMF assemblages. We observed no differences in diversity across our manipulations. We show, however, that mixing habitats and varying connectivity render AMF assemblages less predictable, which we could only detect within and not between our experimental units. We also demonstrate that none of our manipulations favoured any specific AMF taxa. We present here evidence that the community structure of AMF is less responsive to spatio-temporal manipulations than root colonization rates which is a facet of the symbiosis which we currently poorly understand.

scholarly journals How Can We Adapt Thermal Comfort for Disabled Patients? A Case Study of French Healthcare Buildings in Summer

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4530
Author(s):  
Youcef Bouzidi ◽  
Zoubayre El Akili ◽  
Antoine Gademer ◽  
Nacef Tazi ◽  
Adil Chahboun
Keyword(s):  
Thermal Comfort ◽  
Thermal Environment ◽  
Residential Buildings ◽  
Linear Regression Analysis ◽  
Environmental Parameters ◽  
Physical Parameters ◽  
Mean Radiant Temperature ◽  
Operative Temperature ◽  
Neutral Temperature ◽  
Radiant Temperature

This paper investigates adaptive thermal comfort during summer in medical residences that are located in the French city of Troyes and managed by the Association of Parents of Disabled Children (APEI). Thermal comfort in these buildings is evaluated using subjective measurements and objective physical parameters. The thermal sensations of respondents were determined by questionnaires, while thermal comfort was estimated using the predicted mean vote (PMV) model. Indoor environmental parameters (relative humidity, mean radiant temperature, air temperature, and air velocity) were measured using a thermal environment sensor during the summer period in July and August 2018. A good correlation was found between operative temperature, mean radiant temperature, and PMV. The neutral temperature was determined by linear regression analysis of the operative temperature and Fanger’s PMV model. The obtained neutral temperature is 23.7 °C. Based on the datasets and questionnaires, the adaptive coefficient α representing patients’ capacity to adapt to heat was found to be 1.261. A strong correlation was also observed between the sequential thermal index n(t) and the adaptive temperature. Finally, a new empirical model of adaptive temperature was developed using the data collected from a longitudinal survey in four residential buildings of APEI in summer, and the obtained adaptive temperature is 25.0 °C with upper and lower limits of 24.7 °C and 25.4 °C.

Floristic study and assessment of the environmental factors governing the distribution of riparian plants in the Zat sub-Basin: Tensift Watershed, Morocco

2020 ◽  
Vol 45 (2) ◽  
pp. 7900-7915
Author(s):  
Mostakim Lahcen ◽  
Fetnassi Nidal ◽  
Ghamizi Mohamed
Keyword(s):  
Environmental Factors ◽  
Pearson Correlation ◽  
Ecological Status ◽  
Environmental Parameters ◽  
Quality Parameters ◽  
Phosphorus Concentration ◽  
Factors Affecting ◽  
Riparian Plants ◽  
Emergent Plants ◽  
Significant Difference

Measuring the phytodiversity and determining environmental factors affecting the abundance and distribution of riparian plants of Zat sub-basin in Morocco were carried out in this study. A hypothesis was tested whether there is any statistically significant difference in environmental parameters and plants communities among the Zat River and its tributaries. For this purpose, water quality parameters such as temperature, pH, salinity, electrical conductivity, Dissolved Oxygen, nitrate and phosphorus concentration, and riparian plants diversity were estimated at 17 stations along the Zat River and its tributaries during the periods (2018 and 2019). The Canonical Correspondence Analysis (CCA) and Pearson correlation were preformed to assess the relationship between environmental parameters, and the distribution and abundance of riparian plants inventoried. The presence of 113 species was recorded, distributed between 43 families and 97 genera, 9 of which were floating-leaved, 24 submerged, and 80 emergent plants. The rare and threatened species inventoried were represented by 7 taxa, whereas 6 species are reported as endemic. Raunkiaer classification showed a dominance of therophytes (38.39%) over the other groups. According to CCA, the abiotic parameters (DO, elevation, salinity and nitrate concentration) were statistically significant parameters governing the distribution and abundance of the riparian plants inventoried. The results obtained reveal the state of the riparian vegetation in the Zat subBasin, therefore we can consider them as a reliable component for the assessment of the ecological status of the aquatic environment.

scholarly journals Physiological Response of Thallasia hemprichii on Antrophogenic Pressure In Pari Island, Seribu Islands, DKI Jakarta

2017 ◽  
Vol 22 (1) ◽  
pp. 40 ◽  
Author(s):  
Aditya Hikmat Nugraha ◽  
Dietriech G. Bengen ◽  
Mujizat Kawaroe
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Physiological Responses ◽  
Research Station ◽  
Marine Biota ◽  
Nursery Ground ◽  
Thalassia Hemprichii ◽  
Growth Physiology ◽  
Rhizome Growth ◽  
Seagrass Ecosystem

Seagrass ecosystem is one of tropical marine ecosystem and have important function. The function of ecosystem like a feeding and nursery ground for marine biota. Antrophogenic pressure is one of threat for seagrass ecosystem sustainability. This research study about effect antropogenic pressure for seagrass Thallasia hemprichii physiology response in some different location at Great Barrier Pari Island. The physiology response study cover growth, heavy metal bioaccumulation and histology analysis. The result shows that growth of leaf and rhizome Thalassia hemprichii have positif correlation with nutrient consentration in environment. The highest growth of leaf Thalassia hemprichii at 2nd station (4.16 mm.day-1) and the highest growth of rhizome Thalassia hemprichii at 4th station (1.3 mm.day-1). Seagrass can accumulation heavy metal from environment. The highest heavy metal accumulation is Pb. Not correlation between heavy metal consentration in seagrass with heavy metal concentration from environment. Analysis histology result that not damage seagrass tissue in all research station. Keyword : Bioacumulation,Growth,Physiology,Seagrass, Thalassia hemprichiiSeagrass ecosystems is one of the tropical marine ecosystems that have important functions, among others as a feeding and nursery ground for marine life. Anthropogenic stress is one of the threats that may inhibit the survival of seagrass ecosystems. This study examines the effects of anthropogenic pressures on physiological responses of seagrass Thalassia hemprichii at several different locations in Pari Islands. Physiological responses studied were leaves and rhizome growth, bioaccumulation of heavy metals and histological tissue analysis on seagrass. The results showed that the growth response of seagrass has a positive correlation with the nutrients in the environment. Seagrass leaf growth is highest at Station 2 (4.16 mm.day-1) and rhizome growth is highest at Station 4 (1.3 mm.day-1). Seagrass accumulate heavy metals from the environment and accumulation of heavy metals is highest on Pb. There is no correlation between the concentration of heavy metals in the seagrass and environment. The results of histological analysis showed that there was no damage to the tissue of seagrass leaf and rhizome. Keywords : Bio-acumulation, Growth, Physiology, Seagrass, Thalassia hemprichii

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