Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Assessment of Avicennia marina Growth Characteristics on an Artificial Inlet at Bushehr, Iran
A. Ghasemi,H. Jalilvand,S. Mohajeri Borazjani
Research Journal of Soil and Water Management , 2013, DOI: 10.3923/rjswm.2013.7.12
Abstract: The purpose of this project was to asses ecological development of Avicennia marina in hyper saline condition. During 2001 and 2002 a restoration mangrove project planting A. marina in artificial inlet in Bushehr Province, Iran was carried out in Agriculture and Natural resources research center of Bushehr province in Sabkha lands. Some the vegetative characteristics of such as height, diameter and crown diameter in two aspects were recorded in 2012. To investigate physico-chemical properties of soil were taken in inside and outside of inlet and were analyzed: salinity, soil acidity, potassium, phosphorus, nitrogen, texture of soil were measured. Both of treatments were analyzed by t-test in SAS Software.
Distribution, migration and purifying effect of cadmium in artificial Avicennia marina wetland system

CHEN Guikui,CHEN Guizhu,

应用生态学报 , 2005,
Abstract: An artificial mangrove Avicennia marina wetland was set up in a greenhouse, and an irrigation experiment with synthetic wastewater was performed to research the behavior of cadmium in the artificial wetland system. The synthetic wastewater C1 had the characteristics and strength similar to normal municipal sewage, while C5 and C10 had the nutrients and heavy metals as five and ten times as those in C1, respectively. The control was of 15 per thousand salinity. All the test wastewater was quantitatively irrigated weakly for a year. The results showed that the cadmium in the synthetic wastewater discharged into the system was mainly stagnated in soil subsystem (87.67%-96.74%), and only a small portion (0.43%-3.23%) migrated into plants and litters. After a year trial, the Cd content in roots was more than that in stems and leaves. The artificial Avicennia marina wetland system did have a significant effect on purifying cadmium in synthetic wastewater, and the purification rate for C1, C5 and C10 was 90.43%, 97.17% and 97.06%, respectively.
Phenology of Avicennia marina (Forsk.) Vierh. in a Disjunctly-zoned Mangrove Stand in Kenya
VW Wang’ondu, JG Kairo, JI Kinyamario, FB Mwaura, JO Bosire, F Dahdouh-Guebas, N Koedam
Western Indian Ocean Journal of Marine Science , 2010,
Abstract: Avicennia marina in Gazi Bay, Kenya, displays a disjunct zonation pattern across the intertidal zone with a seaward and a landward A. marina fringe. Earlier studies revealed significant differences in its vegetation structure, physiognomy, root system and leaf morphology, which can be attributed to salinity and tidal inundation differences that characterise the forest zones. The main objective of this study was to investigate the phenology of A. marina in the disjunctly zoned stands by direct shoot observation. Vegetative and reproductive phenology of A. marina was studied from January 2005 to December 2006. Four natural and one reforested sites were used for the study in the landward and the seaward intertidal zone. Randomly selected shoots (54 per site) were carefully tagged for direct shoot observation and sampling done every fortnight for leaf emergence and fall, and bud, flower and fruit production. Vegetative and reproductive attributes of the species were clearly seasonal in both zones with distinct patterns. However, shifts in peaks in leaf fall and emergence were observed in 2006. Unimodal and bimodal leaf fall patterns were respectively observed at the landward and seaward sites. Monthly leaf emergence and fall was significantly different (p<0.05) within sites, but not significantly different (p>0.05) between sites. Mean leaf longevity was 11 months with a significant difference (p<0.05) between the seaward reforested site and the landward site. Bud initiation occurred in November in both zones. However, flowering occurred earlier and the fruiting period was shorter in the landward zone compared to late flowering and prolonged fruiting in the seaward zone. Fruit fall peaked in April and May during the wet season. Differences in the vegetative and reproductive phenology of A. marina across the intertidal zone are discussed.
Species Diversity and Seasonal Occurrence of Fungi on Seedlings of Avicennia marina (Forsk.) Vierh
F.S. Mehdi,S.M. Saifullah
Pakistan Journal of Biological Sciences , 2000,
Abstract: Thirty nine different species of fungi were isolated from seedlings of black mangrove Avicennia marina (Forsk.) Vierh growing at Clifton area of Karachi and their habitat, eleven exclusively from seedlings, fifteen from habitat and thirteen common to both sources. Aspergillus was the most diverse genus with six species followed by Penicillium with four species. Deuteromycotina was also the most common and dominant group. The frequency of fungal colonization and species diversity (number of species) both were highest during the south west monsoon season (summer) and negligible during the north east monsoon season (winter), indicating preference for high values of temperature and precipitation by these organisms.
Distribution and migration of zinc in Avicennia marina plant;soil system.

CHEN Gui-kui,CHEN Gui-zhu,

应用生态学报 , 2007,
Abstract: Zinc is a major anthropogenic contaminant in estuarine ecosystem, and has potential ecotoxicological consequences for aquatic animals and plants. An artificial mangrove wetland was set up in greenhouse to study the distribution and migration of zinc in synthetic wastewater in Avicennia marina plant-soil system. Different concentration synthetic wastewater and 1.5% salinity artificial seawater (control) were discharged into the system in fixed quantity twice a week for a year. The results showed that most part (>67%) of zinc in the artificial wastewater discharged into the system was remained in the soil, and only a small portion (1.24%-10.4%) of it was entered into plant and litter, indicating that this artificial plant-soil system had a stronger purifying effect on the zinc in synthetic wastewater. The calculation with matter balance model indicated that soil subsystem had a higher environmental capacity of bearing zinc.
Effects of used lubricating oil on two mangroves Aegiceras corniculatum and Avicennia marina
YE Yong,TAM N F Y,
YE Yong

环境科学学报(英文版) , 2007,
Abstract: An outdoor experiment was set up to investigate the effects of used lubricating oil (5 L/m2) on Aegiceras corniculatum Blanco. and Avicennia marina (Forsk) Vierh., two salt-excreting mangroves. A. marina was more sensitive to used lubricating oil than A. corniculatum and canopy-oiling resulted in more direct physical damage and stronger lethal effects than base-oiling. When treated with canopy-oiling, half of A. corniculatum plants survived for the whole treatment time (90 d); but, for A. marina, high mortality (83%) resulted from canopy-oiling within 3 weeks and no plants survived for 80 d. Base-oiling had no lethal effects on A. corniculatum plants even at the termination of this experiment, but 83% of A. marina plants died 80 d after treatment. Forty days after canopy-oiling, 93% of A. corniculatum leaves fell and no live leaves remained on A. marina plants. By the end of the experiment, base-oiling treatment resulted in about 45% of A. corniculatum leaves falling, while all A. marina leaves and buds were burned to die. Lubricating oil resulted in physiological damage to A. corniculatum leaves, including decreases in chlorophyll and carotenoid contents, nitrate reductase, peroxidase and superoxide dismutase activities, and increases in malonaldehyde contents. For both species, oil pollution significantly reduced leaf, root, and total biomass, but did not significantly affect stem biomass. Oil pollution resulted in damage to the xylem vessels of fine roots but not to those of mediate roots.
Genetic variation of mangrove species Avicennia marina in Iran revealed by microsatellite markers
HV Kahrood, SAA Korori, M Pirseyedi, A Shirvany, A Danehkar
African Journal of Biotechnology , 2008,
Abstract: Mangroves play an essential role in ecosystem dynamics but are reported to be regressing as human pressure increases on coastal zones. In order to ensure conservation of mangroves, genetic diversity in remaining population must be explored. Since Avicennia marina is an environmentally susceptible species, such studies including examination of its genetic variation is done in a worldwide range. During the present study the level of genetic variation of mangrove trees (A. marina) in three coastlines of Bushehr province (Southwest regions of Iran) was examined using microsatellite markers. Three microsatellite loci which were applied in the last large-scale study, detected high levels of allelic diversity here (14 alleles in total), essential for an accurate estimation of population genetic parameters. The levels of heterozygosity detected for each population, over all loci, ranged from 0.451 to 0.667 with an average of 0.589, indicating relatively appropriate level of genetic variation. The expected heterozygosity was larger than the observed heterozygosity leading to positive inbreeding coefficients in all three populations. Highly significant departures from Hardy-Weinberg Equilibrium were detected in populations. Reduced level of genetic variation was found in the central population indicating strong genetic structure among the other populations with larger area and less exploitation.
M.U.Borkar, Athalye R.P. and Quadros Goldin
Journal of Coastal Development , 2011,
Abstract: The mangrove Avicennia marina is a dominant mangrove along the anthropogenically stressed tropical Thane creek, west coast of India. Leaf anatomy of the mangrove along the Thane creek, was assessed in relation to stationwise and seasonwise variations in salinity. It was noticed that under the conditions of higher salinity, Avicennia marina showed increased thickness of hypodermal water storage tissue in the leaf (for conservation of water) and produced taller salt extruding glands at the lower epidermis to eliminate more salt; whereas, the thickness of the photosynthetic mesophyllic tissue significantly reduced. At lower salinity or with reduction in salinity in monsoon, contrary to above occurred. These changes probably explain the stunted growth of Avicennia marina in high salinity environment and its vigorous growth at lower salinity.
Effect of Avicennia Marina and Paecilomyces lilacinus on Root Rot - Root Knot Diseases of Tomato  [PDF]
Fatima S. Mehdi,Imran Ali siddiqui,Shazia Erum,Rajab Ali
Pakistan Journal of Biological Sciences , 1999,
Abstract: Potential of Avicennia marina (mangrove) with Paecilomyces lilacinus for the control of root infecting fungi viz., Macrophomina phaseolina, Fusarium solani, Rhizoctonia solani and Meloidogyne javanica root knot nematode was evaluated invitro and under green house conditions. Soil amendment with A. marina alone or in combination with P. lilacinus significantly controlled root rot-root knot diseases in tomato with enhancement in plant growth. Organic amendment enhanced biocontrol efficacy of P. lilacinus in the control of root pathogens.
Bioaccumulation of Zn and Pb in Avicennia marina (Forsk.) Vierh. and Sonneratia apetala Buch. Ham. from Urban Areas of Mumbai (Bombay), India
A Shete, VR Gunale, GG Pandit
Journal of Applied Sciences and Environmental Management , 2007,
Abstract: Accumulation of heavy metals (Zn, Pb) was studied in two mangrove species Avicennia marina (Forsk.)Vierh. and Sonneratia apetala Buch.Ham. under field conditions. Variation in concentration of metals was found in leaf, root and sediment samples of these two species from different localities. Both the species of mangroves from different locations had high concentration of zinc when compared to lead. Lead showed less mobility towards the leaf tissue. In comparison to Sonneratia apetala, roots of Avicennia marina showed higher accumulation of the metals.
Page 1 /100
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.