Wyniki wyszukiwania - Biblioteka Nauki

1

Trends in Mangrove meiobenthic studies in India: an overview

100%

Chatterjee T. , Ingole B. , Guru B. C.

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tom 28

2

Preliminary GC-MS analysis of compounds present in the root exudates of three mangrove species

100%

Kumar T. , Ray S. , Brahmachary R. L. , Ghose M.

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tom Vol. 21, no. 1

117-125

EN

Root exudates were obtained from three mangrove species, viz. Bruguiera gymnorrhiza, Excoecaria agallocha, and Heritiera fomes. Spot tests revealed the presence of, presumably, phenolic compounds in the exudates. Paper chromatography revealed two spots each for B. gymnorrhiza and H. fomes and a single spot for E. agallocha. GC-MS analysis suggested the presence of aminopyrine, palmitic acid, stearic acid, di- n -propyl ether, and 2,5-anhydrogluconic acid in B. gymnorrhiza exudates, aminopyrine and palmitic acid in E. agallocha exudates, and aminopyrine, palmitic acid, and 2,5-anhydrogluconic acid in H. fomes exudates.

3

Preliminary Phytotoxicity Test on Salinity Against Mangrove Plants of Rhizophora mucronata

100%

Titah H. S. , Purwanti I. F. , Pratikno H. , Chimayati R. L. , Handayanu

Journal of Ecological Engineering

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2019

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tom Vol. 20, nr 3

126--134

EN

The phytotechnology concept that is applied for a bio-desalination reactor become a new desalination technology. The desalination technology can be called as bio-desalination technology to remove ions of Na+ and Cl- in brackish or saline water using mangrove plant. Before the mangrove plants were used in bio-desalination technology, the preliminary phytotoxicity test was conducted. The purpose was to determine the salinity concentration at which the mangrove species of Rhizophora mucronata can survive. The preliminary phytotoxicty test was carried out using a plastic reactor that was designed as a reed bed system. The reactors filled with gravel, sand, and artificial saline water. The variation of the NaCl concentrations were 0 mg/L as control, 10,000; 20,000; 30,000; 40,000, and 50,000 mg/L. The physical observation of the survival condition of Rhizophora mucronata was carried out during the preliminary test for 7 days. The analysis of Scanning Electron Microscopy (SEM) on Rhizophora mucronata was conducted at the end of exposure. The results showed that Rhizophora mucronata could not survive at the concentrations of 40,000 and 50,000 mg/L. Rhizophora mucronata changed the color of the leaves to brown and the stems become softer. Multiple cell damage and the decreasing trend of sodium and chloride amounts occured on roots and stems at the salinity concentration of 50,000 mg/L. In conclusion, the high of salinity concentration (> 30,000 mg/L) can be toxic to Rhizophora mucronata.

4

Success Rate of Mangrove Planting based on Mangrove Morphology at Pramuka Island, Kepulauan Seribu National Park, Indonesia

86%

Palufi G. E. , Hamdani H. , Pratama R. I. , Sahidin A.

World News of Natural Sciences

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2019

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tom 27

73-84

EN

Planting mangroves on Pramuka Island is done in a monoculture way and usually fails. However, the planting managed by the Kepulauan Seribu National Park has become more successful. The specific objective of the research was to quantify the success rate of mangrove planting in Pramuka Island based on survival, growth and benthos levels in Pramuka Island mangroves. The mangrove planting area that was used as the research sample was an area wherein the planting are 14, 12 and 6 years old. The type of mangrove that planted is Rhizophora stylosa. The number of plots was determined based on the area. Data was collected in the form of primary data, namely, the number of living trees, tree heights, number of leaves and leaf dimensions. The success of mangrove planting reached 52%, 66.43% and 57.5% at stations 1, 2 and 3. The highest success rate was at station 2, while stations 1 and 3 are considered failures. This indicates that Pramuka Island has a low success rate of mangrove planting.

5

Ecological assessment of heavy metals in the grey mangrove (Avicennia marina) and associated sediments along the Red Sea coast of Saudi Arabia

86%

Alzahrani D. A. , Selim E.-M. M. , El-Sherbiny M. M.

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2018

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tom No. 60 (4)

513--526

EN

Mangroves play an integral role as a metal accumulator in tropical and subtropical marine ecosystems. Twenty-one sets of sediment samples and portions of mangroves were collected along the Saudi Arabian coast of the Red Sea to assess the accumulation and ecological risks of heavy metals. Results showed that the following mean concentrations of heavy metals in sediments: Cr (46.14 μg g−1 ± 18.48) > Cu (22.87 μg g−1 ± 13.60) > Ni (21.11 μg g−1 ± 3.2) > Pb (3.82 μg g−1 ± 2.46) > Cd (0.75 μg g−1 ± 0.87). The maximum concentrations of the studied metals were above the threshold effect level, indicating a limited impact on the respective ecosystems. The maximum concentration of Cd exceeded its toxic effect threshold, revealing a harmful risk to biota in the sediments. Based on metallo-phytoremedation, biological concentration factors were >1, suggesting that Avicennia marina can accumulate heavy metals, especially Cr and Pb. The translocation factor was above the known worldwide average. The geo-accumulation index revealed that sediments in mangrove areas ranged from moderately to heavily contaminated with Cd at Al-Haridhah and moderately contaminated at South Jeddah, Rabigh, Duba, and the wastewater treatment station near Jazan. The ecological risk index revealed that Cd could pose a relatively very high risk to the mangrove ecosystem. The present study emphasized the possibility of establishing a framework for the management of the coastal aquatic ecosystems along the Red Sea coast of Saudi Arabia.

6

Diversity of polyisoprenoids in ten Okinawan mangroves

72%

Basyuni M. , Sagami H. , Baba S. , Iwasaki H. , Oku H.

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tom 75

EN

The distribution and occurrence of polyisoprenoids (dolichols and polyprenols) in the leaves and roots of nine true Okinawan mangroves and the leaves of one associate mangrove were analyzed using two-dimensional thin layer chromatography. In the leaves, the distribution of three types (I, II, and III) of polyprenols and dolichols were detected. (I) The predominance of dolichols over polyprenols (more than 90%) was observed in Avicennia marina, Bruguiera gymnorrhiza, B. gymnorrhiza (yellow leaves), and Rhizophora stylosa. (II) The occurrence of both polyprenols and dolichols is observed in Excoecaria agallocha, Kandelia obovata, K. obovata (yellow leaves), Lumnitzera racemosa, Pemphis acidula, and Sonneratia alba. (III) The predominance of polyprenols over dolichols (more than 90%) is observed in Heritiera littoralis and Hibiscus tiliaceus. However, in the roots, a type-I distribution was observed in A. marina, B. gymnorrhiza, E. agallocha, H. littoralis and S. alba. A type-II distribution was observed in K. obovata, L. racemosa, P. acidula, and R. stylosa with no type-III distribution. The chain-length distribution of dolichols in the leaves and roots was C50–C140 and C60–C120, respectively. A similar chain-length distribution of polyprenols of C45–C140 and C65–C85 was detected in the leaves and roots respectively. Taken together, sixteen out of twenty-one tissues indicated that dolichols are more abundant than polyprenols in both leaves and roots. The present study is the first to clarify the diversity of polyisoprenoids in both the leaves and roots of mangrove, suggesting the chemotaxonomic significance of polyisoprenoids in the mangrove tree species.

7

Ecological importance of Rhizophoraceae – a true mangrove family

72%

Arunprasath A. , Gomathinayagam M.

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2015

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tom 43

EN

Mangroves are various types of trees up to medium height and shrubs that grow in saline coastal sediment habitats in the tropics and subtropics mainly between latitudes 25° N and 25° S. Mangrove ecosystems represent natural capital capable of producing a wide range of goods and services for coastal environments and communities and society as a whole. Some of these outputs, such as timber, are freely exchanged in formal markets. Value is determined in these markets through exchange and quantified in terms of price. Particularly the mangroves of Rhizophoraceae have so many ecological importances. Breeding and nursery grounds for a number of marine organisms including the commercially important shrimp crab and fish species. Mangrove trees are also used for house building, furniture, transmission as well as telephone poles and certain household items. Mangrove trees have been the source of firewood in India since ancient time. Because of the high specific gravity of rhizophoraceous wood, the species of Rhizophora, Kandelia, Ceriops and Bruguiera are preferred for firewood.

8

Report of Acarothrix palustris Bartsch (Acari: Halacaridae) from the Indian Ocean

72%

Chatterjee T. , Guru B. C. , Sorensen M. V.

Zeszyty Naukowe. Acta Biologica. Uniwersytet Szczeciński

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2013

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tom 20

EN

The present study reports a new distribution record for the halacarid mite Acarothrix palustris Bartsch, 1990 on mangrove pneumatophores from Goa, India. Earlier this species was known from Hong Kong and Singapore (West Pacific Ocean). The present report represents the first record of the species from the Indian Ocean.

PL

Niniejsze badania wskazują nowe miejsca występowania Acarothrix palustris Bartsch, 1990 w zaroślach namorzynowych z okolic Goa (Indie). Wcześniej gatunek ten był znany z Hong Kongu i Singapuru (West Pacific Ocean). Niniejsza praca jest pierwszym doniesieniem o występowaniu tego gatunku w oceanie indyjskim.

9

Ecological assessment of heavy metals in the grey mangrove (Avicennia marina) and associated sediments along the Red Sea coast of Saudi Arabia

72%

Alzahrani D. A. , Selim E.-M. M. , El-Sherbiny M. M.

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tom 60

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nr 4

10

Effect of crude oil on the development of white mangrove seedlings (Avicennia germinans) in the Niger Delta, Nigeria

58%

Chindah A. , Braide S. , Amakiri J. , Onokurhefe J.

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nr 2

EN

Crude oil is a complex hydrocarbon whose introduction into the environment may be hazardous to aquatic and human life, and consequently a threat to natural resources. The severity of the impact of crude oil depends on a variety of factors, including characteristics of the oil itself, natural conditions such as water temperature and weather, and the sensitivities of receiving or impinging biota. As a result, various biological resources such as mangrove seedlings have different sensitivities to oil spills. The long-term persistence of oil in the environment may cause defoliation and possibly death. Recruitment of seedlings into the oiled area may also be affected. This study is designed to evaluate the acute and chronic effects of crude oil (Bonny Light) on the growth performance of mangrove seedlings in the laboratory; monitoring critical plant growth attributes such as stem height and diameter, leaf length, width and numbers of leaves (leaf production), senescence, and seedling survival, for sixteen weeks. The study revealed that mangrove seedlings responded differently in growth attributes with varying treatment. Evidence of crude oil effects were remarkably demonstrated between control and acute (Wilcoxon sign – rank t-test (1.0) > P (0.29)0.05 and chronic (Wilcoxon sign – rank, t-test (1.0) > P (0.47)0.05 exposure. The critical growth response by mangrove seedlings as a result of the treatments was further explained by the cluster and correspondence analyses.

11

Malaysian mangrove forests and their significance to the coastal marine environment

58%

Jusoff K.

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nr 4

EN

Mangrove forests are one of the most productive and bio-diverse wetland environments on earth. Yet these unique coastal tropical forest environments are among the most threatened habitats in the world. Some key progress points in mangrove conservation, restoration, and research in Malaysia are highlighted. Based on an intensive literature review, the ecology and ecological management, distribution and areas of existing mangroves in the world and Malaysia, issues associated with mangrove conservation and restoration are discussed. Growing in the intertidal areas and estuary mouths between land and sea, mangroves provide critical habitat for diverse marine and terrestrial flora and fauna. Important for the flora and fauna is the opportunity to continue living in a sustainable environment and in suitable conditions. A potential stand is the place that obtains the possibility of germination and establishment of a plant species according to their physical, chemical, and biological demands. In many cases it is seen that because of unsuitable selection of site and species, afforestation and reforestation projects are forced to fail after spending time, cost, and labor. The population boom and rapid economic developments have greatly reduced mangrove areas in Malaysia despite the Malaysian government launching a series of programs to protect mangroves in the 1980s and establishing mangrove ecosystems as high-priority areas for improving environmental and living resource management. The issues, threats, and significant values of mangroves also were highlighted. A more systematic protection strategy using ecological engineering management-based, active restoration and rehabilitation measurements still are urgently needed in order to preserve these valuable resources in Malaysia.