scholarly journals KONDISI HABITAT DAN EKOSISTEM MANGROVE KECAMATAN SIMPANG PESAK, BELITUNG TIMUR UNTUK PENGEMBANGAN TAMBAK UDANG (Habitat Conditions and Mangrove Ecosystem in Simpang Pesak District, East Belitung for Development of Shrimp Pond)

2015 ◽  
Vol 22 (1) ◽  
pp. 59 ◽  
Author(s):  
Endang Juwita ◽  
Kadarwan Soewardi ◽  
Yonvitner Yonvitner
Keyword(s):  
Mangrove Ecosystem ◽  
Habitat Conditions ◽  
Shrimp Pond

scholarly journals COLONIZATION OF MANGROVE FOREST AT ABANDONED SHRIMP-POND OF SEGARA ANAKAN-CILACAP

2015 ◽  
Vol 4 (1) ◽  
Author(s):  
Tjut Sugandawaty Djohan
Keyword(s):  
Mangrove Forest ◽  
Mangrove Ecosystem ◽  
Mangrove Forests ◽  
Shrimp Ponds ◽  
Shrimp Pond ◽  
Mangrove Tree ◽  
Rhizophora Apiculata ◽  
Acanthus Ilicifolius ◽  
Avicennia Alba ◽  
Mangrove Trees

During the 1996 to 1997, large areas of mangrove forest in the Segara Anakan were cleared and converted into intensive shrimp-ponds. After one to two years, these shrimp-ponds failed and were abandoned. These abandoned ponds created large gap areas and canopy gaps, which were colonized by mangrove shrub and liana. The Segara Anakan mangrove also experienced heavy siltation, and there were tree cuttings from the remnant of the mangrove trees. This research aimed to study the colonization of mangrove vegetation at the abandoned-shrimp pond. Vegetation data were collected using rectangular plots of 25 m x 25 m with 4 replicates. The water qualities were also studied. The results revealed that the mangrove forests were composed of two layers: canopy tree and floor-vegetation. The gap areas triggered the pioneer species of mangrove shrubs and liana, Acanthus ilicifolius and Derris heterophylla, to colonize and dominate 100% of the mangrove forest floor. The mangrove trees consisted of natural and planted tree species. The natural trees were Sonneratia alba, Avicennia alba, and saplings of Aegiceras corniculatum, which  varied between 56 – 136, 4, and 4 individuals per ha, respectively. The planted trees were Rhizophora apiculata, which amounted to 4 – 12 individuals per ha, at the island of the ponds. These trees and saplings were entangled by the liana mangrove, which disturbed their growth. The A. ilicifolius and D. heterophylla prevented the mangrove tree propagules to grow, and they colonized and characterized those abandoned shrimp-ponds, which threatened the Segara Anakan mangrove ecosystem. 

scholarly journals DIEL DISTRIBUTION OF DESOLVED OXYGEN AT TRADITIONAL-SQUARE SHRIMP POND IN MANGROVE ECOSYSTEM OF BONDAN SEGARA ANAKAN

2015 ◽  
Vol 2 (1) ◽  
pp. 243
Author(s):  
Tjut Sugandawaty Djohan ◽  
Krisni Suhesthiningsih ◽  
Amsal Pasila
Keyword(s):  
Dissolved Oxygen ◽  
Aquatic Macrophyte ◽  
Mangrove Ecosystem ◽  
Early Morning ◽  
Dry Season ◽  
Water Inflow ◽  
Large Area ◽  
Shrimp Ponds ◽  
Shrimp Pond ◽  
Do Concentration

<p>In 1997, large area of mangrove forest in Segara Anakan was converted into the intensive shrimp-ponds, which were failed, abandoned, and colonized by mangrove shrubs. Some of these abandoned shrimp-ponds were changed into the traditional shrimp-ponds using tides as a source of energy. We aimed to study the diel distribution of dissolved oxygen (DO) at the traditional-square shrimp pond, 250m x 80m, during the dry season of October 2009. This pond had one gate for water inflow and out flow from Bondan River, which was automatically open and closed by tides. The island of this shrimp-pond was colonized by aquatic macrophyte, Fimbristylis polytrichoides, which was die-back during the dry season. We also measured pH, salinity, and temperature both at the shrimp pond and the water inflow. We hypothesized that DO in the traditional shrimp pond was similar to DO of Bondan River. The sampling was conducted for 3-hour periods in the 24 hours. Water samples were taken from 4 points at the canal, 2 points in the center, island, and 2 points at the water inflow of Bondan River. The results showed that DO distribution in the 24 hours were 3.8-9.2 ppm. The DO concentration of the traditional shrimp-pond was higher than DO of the Bondan River. The DO during the day was higher than the night. The lowest DO concentrations were at early morning between 4.7 ppm in the ponds, 3.56 ppm in the river inflow. The DO of the shrimp pond was influenced by the temperature and pH. </p><p><strong>Keywords</strong>: Dissolved Oxygen, traditional shrimp-pond, mangrove</p>

scholarly journals Isolation Hope and Threat of Mangrove Restoration Program in Bogowonto Lagoon, Yogyakarta - Indonesia (2002-2014)

2017 ◽  
Vol 3 (4) ◽  
pp. 1
Author(s):  
Abdullah Firaswan ◽  
Rindra Aryandari ◽  
Akbar Reza ◽  
Nur Faizah ◽  
Nur Rachman ◽  
...  
Keyword(s):  
River Mouth ◽  
Avicennia Marina ◽  
Mangrove Ecosystem ◽  
Landsat 8 ◽  
Vegetation Analysis ◽  
Literature Study ◽  
Sociological Study ◽  
Mangrove Restoration ◽  
Shrimp Pond ◽  
Mangrove Area

<p class="Els-Abstract-text">Bogowonto Lagoon  has  the  largest  mangrove ecosystem in  southern coast  of  Yogyakarta, Indonesia. Several activities on mangrove restoration have been conducted to escalate this remnant mangrove forest area. Conversely, rapid increase of shrimp pond area become threat for mangrove ecosystem in Bogowonto lagoon since the early of 21<sup>st</sup> century. Hence, This study is aimed to investigate mangrove composition, distribution and abundance, progress of mangrove restoration program and shrimp pond extensification in 2002 to 2014. Conducted from April 2015 to May 2015, this research consists of several steps namely survey, vegetation analysis, literature study, sociological study using questionnaire, measurement of mangrove and shrimp pond area using Landsat 8 imageries and Arc GIS 10.1. We determined 15 sites along Bogowonto Lagoon using random sampling by quadratic plot (10 m × 10 m for tree, 5 m ×5  m for sapling) and total counts (for seedling). The result showed that there were seven species of mangrove and six species of associate mangrove. <em>Rhizopora mucronata</em> Lamb. was dominant in each growthform with clumped distribution. <em>R. mucronata</em> and <em>Avicennia marina</em> (<a title="Forssk." href="https://en.wikipedia.org/wiki/Forssk.">Forssk.</a>) <a title="Vierh." href="https://en.wikipedia.org/wiki/Vierh.">Vierh.</a> also dominate from backswamp to rivermouth. Satellite imageries revealed that there was a hope due to upward trends of mangrove area in last 12 yr (approximately 5 ha). However, the significant increase sof shrimp pond area (approximately 34 ha) surrounding mangrove area become current and future threat. Based on sociological study, most of people around Bogowonto Lagoon have high awareness, but less participated on mangrove restoration program. Besides, the river mouth covered by sand become another obstacle of it.</p><div><p class="Els-keywords"><em> </em></p><p class="Els-keywords"><em>Keywords:</em> Bogowonto lagoon, mangrove restoration, shrimp pond, vegetation analysis</p></div>

Species Density and Lead (Pb) Pollution in Mangrove Ecosystem, South Kalimantan

2020 ◽  
Vol 5 (1) ◽  
pp. 70-81
Author(s):  
Anang Kadarsah ◽  
Dafiuddin Salim ◽  
Sadang Husain ◽  
Marta Dinata
Keyword(s):  
Heavy Metal ◽  
Oil Palm ◽  
Ph Value ◽  
Coal Mines ◽  
Organic Matter Content ◽  
Mangrove Ecosystem ◽  
Organic Content ◽  
Species Density ◽  
Pb Pollution ◽  
Mangrove Ecosystems

Its crucial to get information about lead (Pb) heavy metal pollution from mining and oil palm plantation on species density in mangrove ecosystem, to anticipate its impacts. This study aimed is to compare the types and densities of vegetation in mangrove ecosystems allegedly due to mining in Setarap village, Tanah Bumbu Regency and oil palm plantations in Kuala Tambangan Village, Tanah Laut Regency. We also analysis the condition of waters (TDS, pH and DO) and organic content in sediments to acquire data from the South Kalimantan mangrove ecosystems. The results showed there were four species of true mangroves (Avicennia alba, Acanthus ebracteatus, Nypa fruticans and Rhizophora apiculate) could live well in the environment affected by mining or oil palm plantations. The species density for trees was low (933 ind/ha) for mangroves affected by coal mines, while those affected by oil palm plantations had higher densities (1,067 ind/ha). pH value of waters in affected area by coal mining showed more acidic value (pH 5.76) especially at the back, while those by palm oil plantations are more acidic (pH 6) in the estuary. Organic matter content in sediments affected by coal mines was in the range of 0.61-6.59%, while those affected by oil palm plantations showed higher values (0.12-2.19%). Lead heavy metal content (Pb) in waters affected by coal mines was 0.031-0.056 mg/L, while the area affected by oil palm plantations was of higher value (0.110-0.128 mg/L). Lead (Pb) levels in sediments indicate higher values than waters, which reach 3.512-6.046 mg/Kg (affected by coal mines), and in areas affected by oil palm plantations reaching 6.658-6.66 mg/Kg. The general conclusion is that vegetation densities in areas affected by coal mines are lower than oil palm plantations. The level of lead  (Pb) pollution in the sediments is higher than in the waters.

Mangrove Ecosystem Conditions In The Coast Teluk Pria Laot After Tsunami And Rehabilitation Efforts

Jurnal Segara ◽  
2011 ◽  
Vol 7 (2) ◽  
pp. 111
Author(s):  
Dini Purbani ◽  
M. Boer ◽  
Marimin . ◽  
I Wayan Nurjaya ◽  
F. Yulianda
Keyword(s):  
Mangrove Ecosystem

SEEDING DENSITY OF DIFFERENT FISH SPECIES IN POLYCULTURE

2017 ◽  
pp. 74-79
Author(s):  
Yuriy Borisovich Lvov
Keyword(s):  
Fish Species ◽  
Silver Carp ◽  
Seeding Density ◽  
Habitat Conditions ◽  
Method Of Calculation ◽  
Fish Breeding ◽  
Trophic Preferences ◽  
Breeding Zone ◽  
Practical Progress

The article touches upon the principles, biological basics and practical progress of introduction of specific and age polyculture of fishes. Using the results of the analysis of literary and long-term native data, there has been offered the gradation of 12 fish species from different families by resistance to habitat conditions. Crucian ( Carassius gibelio ) has been chosen as the most sustainable object of cultivation. There has been taken an attempt to calculate the number of seeding different fish species in polyculture taking into account their physiological features is made. Subject to specific physiological features of the studied species, there was carried out recalculation of their natural reproductive performance in different fish-breeding zones, which is traditionally carried out for a carp ( Cyprinus carpio ). In particular, in the second fish-breeding zone with area of 1 hectare it is possible to breed 120 kg of carp, or 150 kg of crucian, or 75 kg of silver carp ( Hypophthalmichthys ). Overall productivity is made up of a share of fishes in polyculture, but taking into account tolerance of species, it can be lower than productivity calculated for carp. The method of calculation and formulas which give the chance to determine seeding density of fish species for breeding in polyculture have been offered. This technique makes it possible to use trophic preferences and consider tolerance of each species to the conditions of breeding areas.

Species Diversity in Grassland Communities Under Different Habitat Conditions

2009 ◽  
Vol 24 (1) ◽  
pp. 43-59
Author(s):  
Magdalena Jastrzębska ◽  
Tadeusz Szarejko ◽  
Czesław Hołdyński ◽  
Wiesław Piotr Jastrzębski
Keyword(s):  
Species Diversity ◽  
Habitat Conditions ◽  
Grassland Communities
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