Mangrove Litter Fall in North-Eastern Australia. I. Annual Totals by Component in Selected Species

1981 ◽  
Vol 29 (5) ◽  
pp. 547 ◽  
Author(s):  
NC Duke ◽  
JS Bunt ◽  
WT Williams
Keyword(s):  
Mean Value ◽  
Litter Fall ◽  
Bruguiera Gymnorrhiza ◽  
Rhizophora Apiculata ◽  
Sonneratia Alba ◽  
Eastern Australia ◽  
North Eastern ◽  
Annual Total ◽  
The Mean ◽  
The Tropics

Annual totals of the components of litter fall (leaves, reproductive parts, stipules, wood and residual debris) are presented for Rhizophora apiculata, R. lamarckii and R. stylosa as well as for Sonneratia alba, Avicennia sp., Ceriops tagal, Bruguiera gymnorrhiza and B. parviflora from a large number of sites at Hinchinbrook Island (lat. 18°15'S.; long. 146°15'E.). Annual total litter fall among all species ranged from 3.8 to 19.6 Mg ha-1. The mean value among the Rhizophora spp., the most extensively sampled was 9.6 Mg ha-1 yr-1. Leaves, generally, made up the most important component of all litter materials. The results are compared with records in the literature for tidal as well as non-tidal forests elsewhere in the tropics.

Mangrove Litter Fall in North-Eastern Australia. II. Periodicity

1981 ◽  
Vol 29 (5) ◽  
pp. 555 ◽  
Author(s):  
WT Williams ◽  
JS Bunt ◽  
NC Duke
Keyword(s):  
Fourier Analysis ◽  
Climatic Factors ◽  
Litter Fall ◽  
Bruguiera Gymnorrhiza ◽  
Mangrove Species ◽  
Similar Treatment ◽  
Excoecaria Agallocha ◽  
Rhizophora Apiculata ◽  
Eastern Australia ◽  
North Eastern

Fourier analysis was used to demonstrate distinctive seasonal patterns of leaf litter fall in the mangrove species Rhizophora apiculata, R. stylosa and R. lamarckii. Similar treatment of data for stipule fall was not successful, indicating that this process may be controlled by random events. The fall of leaves and reproductive parts appears to be correlated with climatic factors, notably rainfall, in a fashion that varies with species. Seasonal trends without Fourier analysis are described for Sonneratia alba, Bruguiera gymnorrhiza, B. parviflora, Avicennia sp. and Ceriops tagal in terms of leaves and reproductive parts, and for leaves only in Excoecaria agallocha, Xylocarpus granatum, Heritiera littoralis, Lumnitzera racemosa and L. littorea.

Phenologies and Litter Fall of Two Mangrove Trees, Sonneratia alba Sm. And S. caseolaris (L.) Engl., And Their Putative Hybrid, S. × Gulngai N.C. Duke

1988 ◽  
Vol 36 (4) ◽  
pp. 473 ◽  
Author(s):  
NC Duke
Keyword(s):  
Dry Weight ◽  
Putative Hybrid ◽  
Litter Fall ◽  
Sonneratia Alba ◽  
Eastern Australia ◽  
North Eastern ◽  
Annual Total ◽  
Mangrove Trees

Litter fall studies were used to assess phenologies and productivity of Sonneratia alba, S. caseolaris and their putative hybrid, S. × Gulngai, in north-eastern Australia. Annual total litter falls (mean ± s.d.) were 2.5 × 0.5, 2.6 × 1.4 and 3.2 g dry weight m-2 day-1, respectively. Litter was partitioned into leaves (47, 61 and 50%), wood (12, 14 and 19%) and reproductive parts (41, 25 and 31%). In addition, monthly reproductive schedules were produced for each taxon. Differences between taxa were pronounced. For S. alba, flowering peaked in December and fruiting in February. For S. caseolaris, flowering peaked in late February and fruiting in June and July. S. × Gulngai was characterised by an apparent combination of events described for the two putative parental forms. This observation, along with a low (a%) fruiting success, provides further support for the hybrid status of this taxon.

Observations on the Floral and Vegetative Phenologies of North-Eastern Australian Mangroves

1984 ◽  
Vol 32 (1) ◽  
pp. 87 ◽  
Author(s):  
NC Duke ◽  
JS Bunt ◽  
WT Williams
Keyword(s):  
Vegetative Growth ◽  
Field Studies ◽  
Eastern Coast ◽  
Mangrove Forests ◽  
Litter Fall ◽  
Mangrove Species ◽  
The North ◽  
Rhizophora Apiculata ◽  
Eastern Australia ◽  
North Eastern

The mangrove forests of north-eastern Australia are both species-rich and well developed but there is very little information available on their vegetative growth or flowering and fruiting behaviour. This account attempts to rectify this situation by presenting the results of at least 4 years of field studies and observations. Previous reports recorded no less than 35 mangrove species occumng along the north-eastern coast and observations of the flowering and fruiting status of all these species were made. The results are supported by some litter fall studies and overall they reflect the diversity of mangrove species by displaying a range of peak activity months. However, there are some common trends and most species flower mainly during the dry hot summer (September-December) prior to the rainy season when they drop their propaguies during the morniks of peak rainfall (around February). Detailed studies of litter fall were camed out in Missionary Bay, Hinchinbrook Island (18° 16̸2S.,146° 13̸2E.), and care was taken to record components of floral development and vegetative growth. The results for five species (Rhizophora apiculata, R. stylosa, R. × lamarckii, Bruguiera gymnorhiza and Ceriops tagal var. tagal) include estimates of mean leaf longevity and also suggest that the floral and vegetative cycles are coordinated.

scholarly journals Keanekaragaman Jenis Mangrove di Pantai Kapeta dan Pantai Tanaki, Kecamatan Siau Barat Selatan, Kabupaten Sitaro - Sulawesi Utara (Mangrove Diversity of Kapeta Beach and Tanaki Beach, South West Siau District, Sitaro Regency - North Sulawesi)

2017 ◽  
Vol 6 (1) ◽  
Author(s):  
Ivandri Viktor Kirauhe ◽  
Ratna Siahaan ◽  
Johanis Julian Pelealu
Keyword(s):  
Species Richness ◽  
Line Transect ◽  
Bruguiera Gymnorrhiza ◽  
Terminalia Catappa ◽  
Nypa Fruticans ◽  
North Sulawesi ◽  
Rhizophora Apiculata ◽  
South West ◽  
Sonneratia Alba ◽  
Species Richness And Abundance

Abstrak             Penelitian tentang keanekaragaman mangrove berdasarkan fungsi dan manfaat mangrove di Pulau Siau telah dilakukan untuk menganalisis keanekaragaman jenis vegetasi mangrove di Pantai Kapeta dan Pantai Tanaki, Kecamatan Siau Barat Selatan, Kabupaten Sitaro, Provinsi Sulawesi Utara. Metode garis berpetak berselang digunakan untuk memperoleh kekayaan dan kelimpahan jenis vegetasi. Garis transek diletakkan secara vertikal dari laut ke daratan sebanyak 3 jalur di tiap stasiun dengan jarak antar jalur sekitar 300 m. Data dianalisis secara deskriptif. Indeks keanekaragaman jenis diketahui berdasarkan Indeks Shannon - Wienner (H’). Pantai Kapeta dan Tanaki memiliki kekayaan jenis mangrove sebanyak 10 jenis dari 9 suku dan kelimpahan jenis sebesar 657 individu. Jenis mangrove yang ditemukan di Kecamatan Siau Barat Selatan yaitu Bruguiera gymnorrhiza, Sonneratia alba, Rhizophora apiculata, Nypa fruticans, Croton oblongus, Ficus,  Heritiera littoralis, Intsia bijuga, Ixora talaudensis dan Terminalia catappa. Keanekaragaman jenis mangrove di wilayah penelitian Kecamatan Siau Barat Selatan tergolong rendah dengan indeks H’ sebesar 0,775 yang lebih rendah dari 1. Keanekaragaman mangrove di Pantai Kapeta dan Tanaki juga rendah dengan indeks berturut-turut yaitu 0,654 dan 0,880.Kata Kunci: keanekaragaman mangrove, Pantai Kapeta, Pantai Tanaki, Pulau Siau. Abstract The study on the diversity of mangrove on Siau Island based on the its functions and benefits was conducted to analyze the diversity of mangrove vegetation in Kapeta and Tanaki Beach, District of South West Siau, Sitaro Regency, North Sulawesi. The quadrate line transect method was used to obtain data of species richness and abundance. Three line transects were installed vertically from sea margin to land at each station.  Line spaces were 300 m. Data were analyzed descriptively. Biodiversity index of mangrove was based on  Shannon - Wienner index (H ').  Kapeta Beach and Tanaki Beach had species richness and abundance respectively i.e. 10 species of 9 familes and 657 individu. The mangrove  found in South West Siau District i.e. Bruguiera gymnorrhiza, Sonneratia alba, Rhizophora apiculata, Nypa fruticans, Croton oblongus, Ficus, Heritiera littoralis, Intsia bijuga, Ixora talaudensis and Terminalia catappa. Mangrove diversity in the study area was low (H ' index = 0.775). The diversity of mangrove in Kapeta Beach and Tanaki Beach were also low, i.e.  0.654 and 0.880 respectively.Keywords: mangrove diversity, Kapeta Beach, Tanaki Beach, Siau Island.

scholarly journals Produksi Serasah Musiman pada Berbagai Spesies Mangrove di Pesisir Kabupaten Muna Barat, Sulawesi Tenggara

2020 ◽  
Vol 25 (3) ◽  
pp. 323-333
Author(s):  
Rahman Rahman ◽  
Yusli Wardiatno ◽  
Fredinan Yulianda ◽  
Iman Rusmana
Keyword(s):  
Leaf Litter ◽  
Mangrove Ecosystem ◽  
Litter Production ◽  
Bruguiera Gymnorrhiza ◽  
Rhizophora Stylosa ◽  
Rhizophora Apiculata ◽  
Sonneratia Alba ◽  
Wet Weight ◽  
Bruguiera Cylindrica ◽  
Leaf Litter Production

Mangrove litter production is important in the displacement of organic matter from mangrove vegetation to water such as in the coast of West Muna Regency. However, one factor influencing it is the frequency of rainfall. This research, therefore, aims to determine the influence of the frequency of rainfall in mangrove ecosystem by obtaining data through the fractional wet weight. The results showed that the biomass fraction with the largest amount were Rhizophora mucronata, Rhizophora apiculata, and Sonneratia alba with of 31.59; 31.07; and 30.96%, respectively, while the lowest was Rhizophora stylosa, Bruguiera cylindrica, and Bruguiera gymnorrhiza with of 30.07; 30.10; and 31.95%, respectively. The species with the largest leaf litter production was Bruguiera cylindrica, with of 1.72 g.m-2.day-1 which occurred in April and the lowest was Rhizophora apiculata, 0.24 g.m-2.day-1 in August. The species with the largest leaf litter production was Bruguiera cylindrica, 1.96 g.m-2.day-1 which occurred in May and the lowest was Sonneratia alba, 0.29 g.m-2.day-1 in August. In addition, the species with the largest fruit litter production was Rhizophora apiculata, 1.76 g.m-2.day-1 in April and the lowest was Sonneratia alba, 0.32 g.m-2.day-1 in September. The total litter production was 18,75 g.m-2.day-1 consisted of 6,69 g.m2.day-1 leaf litter, 6,54 g.m-2.day-1 branch litter, and 5,52 g.m-2.day-1 fruit litter. The higher the frequency of the rain, the greater the litter production.   Keywords: biomass fraction, seasonal litter production, West Muna Regency

scholarly journals Mangrove Community Characteristics and Local Fishermen’s Utilization in North Sulawesi Province: Case study on boat raft fishermen in Sauk village, Labuan Uki bay, Bolaang Mongondow regency

2016 ◽  
Vol 4 (2) ◽  
pp. 139
Author(s):  
Ridwan Lasabuda ◽  
Lawrence J. L. Lumingas ◽  
Rose O. S. E. Mantiri
Keyword(s):  
Fishing Ground ◽  
Density Level ◽  
Bruguiera Gymnorrhiza ◽  
Rhizophora Stylosa ◽  
Purposive Sampling ◽  
Rhizophora Apiculata ◽  
Sonneratia Alba ◽  
Mangrove Vegetation ◽  
Avicennia Officinalis ◽  
Vegetation Characteristic

This study aims to analyze the characteristics of mangrove vegetation in Sauk village, Labuan Uki bay, and to know the exploitation activities and the community’s perception on mangrove ecosystem. Mangrove vegetation characteristic data were collected using transect line method in 3 stations, while mangrove utilization and community’s perception data were obtained through field observation, questioners, and structured interviews. Respondent sampling used purposive sampling, and the respondents were representatively selected based on profession background as boat raft fishermen.Results showed that mangroves in Sauk village consisted of 8 species, Avicennia officinalis Aegiceras floridum, Rhizophora apiculata, R. mucronata, R. stylosa, Bruguiera gymnorrhiza, Sonneratia alba, and S. casiolari. The density level was 689 trees.ha-1 (categorized as rare according to the decree of Living Evironment Minister Numbered 201/2004) and the mean vegetation spread was 95.16 M widely available from 22.70 Ha.People used the mangrove for firewood, building materials, boat frame, fish drying place, net dye material (tree skin), dahannya dibuat wadah bunga buatan, and fishing ground. Some people of the village clear cut the mangroves for boat sailing route, despite violating Indonesian Law numbered 27/ 2007 jo Low numbered 1/2014 concerning coastal area and small islands management.Sixty percent of the respondents understood that mangroves can be cut for various benefits, 40% knew that mangrove area is source of income, 40% as source of firewood, 10% as place where fish lay their eggs, and 10% as coast protection from abrasion.Keyword : mangrove, boat raft fishermen, Sauk village, Labuan Uki bay.ABSTRAKPenelitian ini bertujuan untuk   menganalisis karaktersitik vegetasi mangrove yang ada di desa Sauk Teluk Labuan Uki dan  mengetahui aktivitas pemanfaatan serta  persepsi masyarakat tentang ekosistem mangrove. Data karakteristik vegetasi  mangrove diambil menggunakan metode transek line  di 3  stasiun. Sedangkan data pemanfaatan mangrove dan persepsi masyarakat dikumpulkan melalui teknik observasi lapangan, pengisian kuesioner dan wawancara terstruktur. Pengambilan sampel responden menggunakan metode purposive sampling. Responden dipilih secara representatif berdasarkan latar belakang profesi sebagai nelayan bagan perahuHasil penelitian menggambarkan bahwa mangrove yang ada di  desa Sauk terdiri dari 8  spesies : Avicennia officinalis (api-api), Aegiceras floridum (api-api), Rhizophora apiculata (lolaro), Rhizophora mucronata(lolaro), Rhizophora stylosa (lolaro), Bruguiera gymnorrhiza (ting), Sonneratia alba (lolaro)  dan Sonneratia casiolari (posi-posi). Tingkat kerapatan 689 pohon/ha (kategori jarang sesuai Kepmen Lingkungan Hidup No 201 Tahun 2004). Ketebalan vegetasi mangrove rata2 95,16 meter dari luas yang tersedia 22,70 Ha.Masyarakat memanfaatkan mangrove untuk : sumber kayu bakar, dibuat bahan bangunan, dibuat rangka kapal, tempat menjemur ikan, kulitnya sebagai pewarna jaring, dahannya dibuat wadah bunga buatan, tempat menangkap ikan dan biota air lainnya. Selain itu ada oknum masyarakat desa Sauk yang menebang mangrove untuk membuat lintasan perahu,  dimana kegiatan ini bertentangan dengan UU No.27 Tahun 2007 jo UU No.1 Tahun 2014 tentang Pengelolaan Wilayah Pesisir dan Pulau2 Kecil. 60 % responden memahami bahwa mangrove adalah tumbuhan yang bebas ditebang untuk dimanfaatkan berbagai kepentingan. 40 % responden memahami kawasan mangrove adalah sumber pencaharian masyarakat lokal, 40 % responden memahami sebagai sumber untuk mencari kayu bakar, 10 % responden memahami sebagai tempat bertelur ikan, dan 10 % responden memahami sebagai penahan abrasi pantai.Keyword : mangrove, nelayan bagan perahu, desa Sauk, Teluk Labuan Uki

scholarly journals Community Structure and Percent Cover of Mangrove in Gamtala Village, Jailolo District, West Halmahera Regency

2019 ◽  
Vol 7 (1) ◽  
pp. 284
Author(s):  
Elroi Nity ◽  
Suria Darwisito ◽  
Joshian N.W. Schaduw ◽  
Adnan S. Wantasen ◽  
Deiske A. Sumilat ◽  
...  
Keyword(s):  
Community Structure ◽  
Line Transect ◽  
Percent Cover ◽  
Rhizophora Mucronata ◽  
Bruguiera Gymnorrhiza ◽  
Rhizophora Apiculata ◽  
Xylocarpus Granatum ◽  
Sonneratia Alba ◽  
Bruguiera Gymnorhiza ◽  
Avicennia Alba

This study aims to know the percent cover of mangrove and to assess the community structure. It was carried out in Gamtala village, Jailolo district, and west Halmahera regency, using line transect method with 10x10 m plot.. Data analysis covered the community structure and percent cover of mangrove canopy. This study found seven mangrove species, Bruguiera gymnorrhiza, Rhizophora apiculata, Sonneratia alba, Rhizophora mucronata, Avicennia alba, Bruguiera sexangula, dan  Xylocarpus granatum. Based on Importance Value Index (IVI), Bruguiera gymnorhiza had the highest, 149.06, and Avcsennia alba did the lowest, 9.3507. In addition, Gamtala village had manrove percent cover of 72.11 %.Keywords: canopy, community structure, mangrove, Gamtala.ABSTRAKTujuan dari penelitian ini adalah untuk mengetahui persentasi tutupan mangrove dan menghitung struktur. Penelitian ini dilakukan di Desa Gamtala Kecamatan Jailolo Kabupaten Halmahera Barat. Penelitian ini menggunakan metode transek garis dengan 10x10 m plot. Penelitian ini menemukan tujuh spesies mangrove, yaitu Bruguiera gymnorrhiza, Rhizophora apiculata, Sonneratia alba, Rhizophora mucronata, Avicennia alba, Bruguiera sexangula, dan  Xylocarpus granatum. Berdasarkan Indeks Nilai Penting, Bruguiera gymnorhiza memiliki nilai tertinggi, 149,06, dan Avcsennia alba memiliki nilai terendah 9,3507. Sebagai tambahan, desa Gamtala memiliki tutupan mangrove sebesar 72,11 %.Kata Kunci: kanopi, struktur komunitas, mangrove, Gamtala

Reef and Rainforest

2010 ◽  
Author(s):  
Michael McCoy
Keyword(s):  
Solomon Islands ◽  
Natural World ◽  
Northern Australia ◽  
Free Living ◽  
Eastern Australia ◽  
North Eastern ◽  
Terrestrial Life ◽  
Visual Impact ◽  
Almost All ◽  
The Tropics

Reef and Rainforest is a photographic portrayal of marine and terrestrial life in one of the world's most biodiverse regions – the tropics of north-eastern Australia, together with the South Pacific nations of Solomon Islands and Papua New Guinea. The photographs were taken over a period of more than 30 years while the author was living in the Solomon Islands and northern Australia. They depict life on the coral reefs, in the rainforests and in adjacent tropical savannahs. From detailed macro studies to sweeping scenics and aerials, the photographs are impressive for both their technical/compositional expertise and the unique insight they provide into the behavioural nuances of marine and terrestrial wildlife. Almost all the wildlife images are of free-living, non-posed subjects, photographed as they were encountered. Along with the stunning photography, the detailed and reflective captions are drawn from the author’s experiences. Reef and Rainforest conveys the richness and diversity of the natural world with maximum visual impact.

Gap formation and forest regeneration in a Micronesian mangrove forest

2003 ◽  
Vol 19 (2) ◽  
pp. 143-153 ◽  
Author(s):  
Zuleika S. Pinzón ◽  
Katherine C. Ewel ◽  
Francis E. Putz
Keyword(s):  
Forest Regeneration ◽  
Mangrove Forests ◽  
Gap Formation ◽  
Bruguiera Gymnorrhiza ◽  
Federated States Of Micronesia ◽  
Rhizophora Apiculata ◽  
Sonneratia Alba ◽  
Local Use ◽  
Rates Of Growth ◽  
Mangrove Wood

Gaps created by the death of one or more contiguous trees are common in mangrove forests but are poorly understood. In Kosrae, Federated States of Micronesia, where mangrove wood is harvested for local use, most natural gaps were < 50 m2, whereas most logging gaps were > 100 m2. Interior zones, where access is facilitated by roads, were the most heavily exploited. Although the forests contained 11 species, two species were primarily responsible for gap formation. Natural gaps were caused mainly by broken stems and large branches of Sonneratia alba trees, whereas logging gaps were created primarily by harvesting Rhizophora apiculata trees. Most natural gaps were formed by the fall of more than one tree or branch. Seedling densities were higher in logging gaps than in natural gaps and higher in gaps than under intact canopy. Bruguiera gymnorrhiza was the most common seedling species in gaps and under intact canopy. Relative rates of growth in height were faster in gaps than under intact canopy for R. apiculata and B. gymnorrhiza seedlings. Current harvesting practices on the island do not seem to be altering species richness, although R. apiculata may become less common as gaps are increasingly captured by B. gymnorrhiza.

scholarly journals Karakteristik Mangrove Di Muara Sungai Timur Kawasan Laguna Segara Anakan, Kabupaten Cilacap Jawa Tengah

2020 ◽  
Vol 9 (4) ◽  
pp. 416-422
Author(s):  
Raditya Rizki Ananta ◽  
Nirwani Soenardjo ◽  
Rini Pramesti
Keyword(s):  
Community Structure ◽  
Avicennia Marina ◽  
Hemispherical Photography ◽  
Bruguiera Gymnorrhiza ◽  
Mangrove Species ◽  
Nypa Fruticans ◽  
Sonneratia Caseolaris ◽  
Rhizophora Apiculata ◽  
Sonneratia Alba ◽  
Avicennia Alba

ABSTRAK: Ekosistem mangrove adalah komunitas tumbuhan tropis yang berada di daerah tepi pantai yang memiliki kemampuan adaptasi pada perairan asin di wilayah intertidal yang dipengaruhi oleh pasang surut air laut. Struktur komunitas mangrove merupakan salah satu parameter dalam menentukan kondisi mangrove. Kawasan ekosistem mangrove yang memiliki karakteristik dinamis komposisi jenis mangrove terdapat di Segara Anakan. Akan tetapi memiliki penurunan luasan hutan mangrove. Hal ini adanya beragam faktor kondisi lingkungan di Segara Anakan, sehingga menyebabkan variabilitas mangrove wilayah Segara Anakan berbeda. Namun kondisi terkini belum banyak dilakukan dalam suatu penelitian sehingga dibutuhkan informasi ilmiah terkini untuk mengetahui komposisi jenis mangrove. Untuk mengatasi hal tersebut maka dilakukan penelitian struktur komunitas untuk mengetahui kondisi ekologi mangrove di Segara Anakan. Tujuan penelitian ini adalah menggambarkan kondisi struktur komunitas mangrove di muara timur Segara Anakan. Lokasi penelitian berada di muara sungai bagian Timur (Sungai Donan). Metode yang digunakan dalam penelitian ini adalah metode deskriptif. Penentuan titik pengambilan data atau sampel di setiap lokasi dilakukan dengan teknik purposive sampling. Selain itu, digunakan teknik transek kuadrat 10x10 m dan Hemispherical Photography. Hasil penelitian menunjukkan kerapatan pohon sebesar 90,6 /ha. Kerapatan sapling rata-rata bernilai 1023 /ha. Kerapatan seedling bernilai 1746 /ha di Muara Timur. Tutupan kanopi komunitas mangrove memiliki persentase kurang dari 75%. Tinggi dan diameter pohon didapatkan sebesar 5,97 m dan 3,1 cm. Spesies mangrove yang ditemukan di dalam plot berjumlah 10 spesies mangrove yaitu Rhizophora apiculata, Bruguiera gymnorrhiza, Aegiceras corniculatum, Avicennia marina, Avicennia alba, Ceriops tagal, Ceriops decandra, Sonneratia caseolaris, Sonneratia alba, Scyphiphora hydrophyllacea, Xylocarpus moluccensis, Xylocarpus granatum, Talipariti tiliaceum, dan Nypa fruticans. ABSTRACT: Mangrove ecosystems are communities of tropical plants located on the coast that have the ability to adapt to salty waters in intertidal areas which are affected by tides. Mangrove community structure is one of the parameters in determining mangrove condition. Mangrove ecosystem areas that have dynamic characteristics of mangrove species composition are found in Segara Anakan. However, it has decreased the area of mangrove forests. This is because of various environmental conditions in Segara Anakan, causing variability of mangroves in the Segara Anakan area to be different. However, recent conditions have not been carried out in many studies, so the latest scientific information is needed to determine the species composition of mangroves. To overcome this, a community structure research was conducted to determine the ecological conditions of mangroves in Segara Anakan. The purpose of this study was to describe the condition of the mangrove community structure in the eastern estuary of Segara Anakan. The research location is in the mouth of the eastern river (Donan River). The method used in this research is descriptive method. Determination of data collection points or samples at each location was done by using purposive sampling technique. In addition, the 10x10 m quadratic transect technique and Hemispherical Photography were used. The results showed the tree density was 90.6 ind/ha. Saplingaveraged 1023 ind/ha. The density seedling is 1746 ind/ha in Muara Timur. The canopy cover of the mangrove community has a percentage of less than 75%. The tree height and diameter were 5.97 m and 3.1 cm respectively. There are 10 mangrove species found in the plot, namely Rhizophora apiculata, Bruguiera gymnorrhiza, Aegiceras corniculatum, Avicennia marina, Avicennia alba, Ceriops tagal, Ceriops decandra, Sonneratia caseolaris, Sonneratia alba, Scyphiphora hydrophyllacea, Xylocarpus moluccensis, Xylocarpus granatum, Talipariti tiliaceum, and Nypa fruticans.   

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