scholarly journals Analysis of morphological features and chemical properties of the dried seabed soils of the North – Eastern Aral Sea region

2021 ◽  
Vol 62 (3) ◽  
Author(s):  
G. Issanova ◽  
K. Tynybaeva ◽  
A. Saduakhas ◽  
K. Kulymbet ◽  
A. Kalybaeva ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Morphological Features ◽  
Aral Sea ◽  
The North ◽  
North Eastern ◽  
And Chemical Properties

Starch in the Oceans

1968 ◽  
Vol 25 (6) ◽  
pp. 1269-1284 ◽  
Author(s):  
Adam S. Bursa
Keyword(s):  
North Atlantic ◽  
Sea Water ◽  
Chemical Properties ◽  
Benthic Algae ◽  
Virgin Islands ◽  
Starch Grains ◽  
The North ◽  
The Baltic ◽  
Mass Mortalities ◽  
And Chemical Properties

Starch observed in arctic waters of Canada, in the Baltic and Mediterranean seas, in the North Atlantic and Indian oceans, and in the waters about Bermuda, the Virgin Islands, and Jamaica is formed mostly in Gymnodinioideae, benthic algae, and higher aquatic plants and rarely in planktonic Chlorophyceae. In these phytoflagellates the fragile pellicle breaks when there are critical changes in salinity, temperature, or pressure and is subsequently decomposed by bacteria. The starch retains its shape after destruction of the protoplast, and accumulates in large quantities in aquatic habitats. Standing crops of free starch grains mark past blooms and mass mortalities of phytoplankton. The largest potato-like starch grains found in the oceans appear to be derived from the ocellar lenses of Warnoviaceae.Though Protozoa and various herbivores may ingest free planktonic starch, they were not observed to digest it. Large standing crops of starch and monosaccharides derived from amylolysis may affect nutrition in some animals, and influence the optical and chemical properties of sea water. Amylogenesis in some dinoflagellates starts from chondriosomes which are specialized in this process. In Prorocentrideae starch is formed within the ectoplasmic reticulum.

scholarly journals Cryptostegia Madagascariensis Alters the Litterfall and Nutrient Cycling of Litter Inputs in An Invaded Tropical Cambisol From North-Eastern Brazil

2021 ◽  
Author(s):  
Edjane Oliveira de Lucena ◽  
Tancredo Souza ◽  
Leonaldo Alves de Andrade ◽  
Lucas Jónatan Rodrigues da Silva ◽  
Lídia Klestadt Laurindo ◽  
...  
Keyword(s):  
Native Species ◽  
Chemical Properties ◽  
Nutrient Content ◽  
Riparian Areas ◽  
The North ◽  
Litter Decay ◽  
Eastern Brazil ◽  
North Eastern ◽  
Litter Deposition ◽  
Dry And Rainy Seasons

Abstract The invasive Cryptostegia madagascariensis occupies riparian areas covered by tropical Cambisols throughout the North-eastern Brazil however litter is known regarding its ability to impact litter inputs, and ecosystem processes. This study aimed to characterize the effects of the invader on the litter deposition, soil physical-chemical properties, litter nutrient content, and the litter decay rate in a Tropical Cambisol. Comparisons of native and invaded environments showed that C. madagascariensis alters the quantity of litter deposition during both dry and rainy seasons. In contrast to native species, C. madagascariensis litterfall displayed litter seasonal variation (rainy vs. dry season), however invaded sites had higher litter biomass compared to native sites. C. madagascariensis litter was enriched in soil organic matter, N, P, and K contents as compared to the native litter. Compared to native environments, invaded ones had significantly decreased soil temperature and soil water content. Results suggest that C. madagascariensis enhances litter and N, P, and K availability in ways that have potential to impact soil ecosystem in the Tropical Cambisols from Caatinga ecoregion, Brazil.

Petrological, Magnetic and Chemical Properties of Basalt dredged from an Abyssal Hill in the North-east Pacific

Nature ◽  
1969 ◽  
Vol 223 (5210) ◽  
pp. 1049-1050 ◽  
Author(s):  
BRUCE P. LUYENDYK ◽  
CELESTE G. ENGEL
Keyword(s):  
Chemical Properties ◽  
North East ◽  
The North ◽  
East Pacific ◽  
And Chemical Properties
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