scholarly journals Geospatial analysis of the effects of tsunami on coral and mangrove ecosystems of Mayabunder in Andaman Islands, India

2019 ◽  
Vol 67 ◽  
Author(s):  
Debaleena Majumdar ◽  
Subha Chakraborty ◽  
Swati Saha ◽  
Debajit Datta
Keyword(s):  
Geospatial Analysis ◽  
Andaman Islands ◽  
Mangrove Ecosystems

scholarly journals Andaman mangrove sediments: source of nutrients and sink of heavy metals

2018 ◽  
Author(s):  
A.K. Mishra ◽  
K. Manish
Keyword(s):  
Heavy Metals ◽  
Anthropogenic Pollution ◽  
Mangrove Ecosystem ◽  
Biodiversity Hotspot ◽  
Andaman Sea ◽  
Andaman Islands ◽  
Metal Analysis ◽  
Mangrove Sediments ◽  
Trace Metal Analysis ◽  
Mangrove Ecosystems

AbstractAndaman Islands (AI) of India is a biodiversity hotspot of mangroves but biogeochemical dynamics of AI is less understood. We collected sediment samples of four AI mangrove sites and one site without mangroves for nutrients and trace metal analysis. Samples were collected from each site at the inlet of seawater (Zone A) and the other 500m into the mangrove creek (Zone B). Nutrients (sulphate, ammonium, nitrite and nitrate) levels, organic matter (OM) and carbon content were higher at Zone B of mangrove ecosystem due to the higher OM content from mangrove leaf litter decomposition and microbial degradation. Metal (Pb &Cd) content of zones with and without mangroves were similar and Igeo values indicated moderate contamination of mangrove zones of AI due to lack of anthropogenic pollution. Our results suggest mangrove ecosystems of AI are uncontaminated from heavy metals and are source of nutrients to the oligotrophic coastal ecosystems of Andaman Sea.

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.

Pharmacognostical and pharmacological activity of Justicia gendarussa burm.f.: a comprehensive review

2020 ◽  
Vol 11 (3) ◽  
pp. 3384-3390
Author(s):  
Ashish ◽  
Anjali ◽  
Dixit Praveen K ◽  
Nagarajan K ◽  
Sahoo Jagannath
Keyword(s):  
Pharmacological Activity ◽  
Chemical Constituents ◽  
Biological Action ◽  
Andaman Islands ◽  
Comprehensive Review ◽  
Medicinal Value ◽  
Anti Oxidant ◽  
Phytochemical Constituents ◽  
Pharmacologically Active ◽  
Different Parts

Justicia gendarussa Burm .f. (family Acanthaceae) which is also known as willow-leaves and commonly known as Nili-Nirgundi, it is very commonly found nearby to China and its availability is very common in larger parts of India and Andaman islands. Traditionally it is used to treat various sorts of disorders such as wound healing, anti-inflammatory, anti-oxidant, antiproliferative, anti-arthritic etc. Justicia gendarussa is one of the crucial herbs which has been used in the Ayurveda. Majorly leaves parts of the plant shows the pharmacological activity but the root of the plant Justicia gendarussa is also have the important medicinal values. A large variety of pharmacologically active constituents i.e., alkaloids, flavonoids, saponin, carbohydrates, steroids, triterpenoids, carotenoids, aminoacids, tannins, phenolics, coumarines and anthaquinones are also present in this plant and they makes the plant pharmacologically important. The activity of the plant is also dependent on the solvent which is used for the extraction the various vital chemical constituents. The different- different parts of the plants having the different medicinal values also differ in the chemical values. This review is not only focused on the essential phytochemical constituents which is available in the plant but it also explains their necessary medicinal value to shows the essential biological action and phytopharmacological actions of various parts of the plant.

Biogeographic maps for geospatial analysis of environmental potential of Russia

2013 ◽  
pp. 136-144
Author(s):  
G. N. Ogureeva ◽  
T. V. Kotova
Keyword(s):  
Geospatial Analysis ◽  
Ecological Characteristic ◽  
Altitudinal Zonality ◽  
Major Parameter ◽  
Ecological Potential

The concept of ecological potential is realized by development of biogeographical and bioecological maps. Experience of preparation of a set of integrated bioecological maps of Russia of scale 1 : 8 000 000, displaying biot as a whole is presented. It includes maps – Zones and altitudinal zonality types of vegetation of Russia and adjacent territories, Ecoregions of Russia, Bioms of Russia. Maps are developed on the basis of allocation regional (ecological division) and typological (bioms diversity) divisions biote a cover. These divisions can serve basic units at geoinformation researches of modern ecological potential, a binding of the information according to a biodiversity and to a condition biote at national and regional levels. On them it is possible to make inventory of a biodiversity, the major parameter of ecological potential of landscapes, to choose characteristic and unique objects for monitoring and conservations, to planning the actions connected with sustainability progress lands and conservations ecosystems and other.They are directed on revealing of ecological potential of territorial units (zones ecoregions bioregions) through the ecological characteristic biote or on revealing of differentiation biote (zonobioms group of regional bioms regional bioms) through the characteristic of its ecology-typological variety.

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