scholarly journals Community Structure and Biodiversity of Soil Ciliates at Dongzhaigang Mangrove Forest in Hainan Island, China

2010 ◽  
Vol 2010 ◽  
pp. 1-8 ◽  
Author(s):  
Jing Li ◽  
Qingyu Liao ◽  
Mei Li ◽  
Jinhong Zhang ◽  
Nora Fungyee Tam ◽  
...  
Keyword(s):  
Organic Matter ◽  
Community Structure ◽  
Mangrove Forest ◽  
Chemical Properties ◽  
Hainan Island ◽  
Community Similarity ◽  
Dominant Group ◽  
Soil Ciliates ◽  
Physical Chemical ◽  
Total Potassium

The distribution of soil ciliates in three different habitats within a typical mangrove forest in Dongzhaigang, Hainan, China was investigated. The abundance, biodiversity, and community similarity of ciliates in fresh and air-dried soil with different, physical/chemical properties were analyzed. Three Classes, 11 Orders, 34 Genera, and 70 species of ciliates were found with the first dominant group being Hypotrichida. Ciliate biodiversities followed Site B < Site A < Site C in both fresh and dried samples. Ciliate abundance was positively correlated with soil moisture, salinity, organic matter (OM), total nitrogen (TN), total phosphorus (TP), and sulfate (SO42−), but negatively with pH and total potassium (TK). Site A and Site B and Site B and Site C showed the highest similarity in fresh and dried samples, respectively. The ubiquitous characteristics of ciliate distribution suggested their important role in food webs and nutrient cycling. The presence of Colpodida was linked with mangrove plants.

scholarly journals PRODUÇÃO E CARACTERIZAÇÃO DE BIOCARVÃO A PARTIR DE BIOSSÓLIDOS ARMAZENADOS EM BAG’s GEOTÊXTEIS NO MUNICÍPIO DE RANCHARIA -SP

2019 ◽  
Vol 11 (4) ◽  
pp. 142-155
Author(s):  
Beatriz Regina de Ângelo ◽  
Rafaela Pelegrini Vital ◽  
Marcelo Rodrigo Alves ◽  
Jaqueline Oliveira da Silva ◽  
Melissa Arantes Pinto ◽  
...  
Keyword(s):  
Organic Matter ◽  
Sewage Sludge ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Pyrolysis Process ◽  
Physical Chemical ◽  
Physical And Chemical ◽  
Stable Material ◽  
And Chemical Properties

Sewage sludge refers to a nutrient-rich by-product and organic matter from treatment plants and has become a challenge for many research segments to find a rational and sustainable destination for this material. In this context, the carbonization of biomass (by the pyrolysis process) results in biochar, characterized by a very stable material with specific physical and chemical properties and can represent a very important tool for this challenge. Thus, the objective of the present work was to transform, bypyrolysis process, small portions of the biosolid generated in Rancharia ETE into biochar. In addition, both the biosolid and the generated bicarbons were subjected to physical, chemical and structural analyzes in order to proceed with their respective characterization. From the analysis, it was found that the treatment submitted to temperature of 550°C as the best option for possible applications.Keywords:biosolid; pyrolysis; biochar.

scholarly journals Impact of salt and exogenous AM inoculation on indigenous microbial community structure in the rhizosphere of dioecious plant, Populus cathayana

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Na Wu ◽  
Zhen Li ◽  
Ming Tang
Keyword(s):  
Salt Stress ◽  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Rhizosphere Soil ◽  
Chemical Properties ◽  
Biomass Accumulation ◽  
Physical Chemical ◽  
Populus Cathayana ◽  
Inoculation Treatment

AbstractThe sex-specific physical and biochemical responses in dioecious plants to abiotic stresses could result in gender imbalance, and how to ease the current situation by microorganisms is still unclear. Using native soil where poplars were grown, growth parameters, soil physicochemical properties in the rhizosphere soil of different sexes of Populus cathayana exposed to salt stress and exogenous arbuscular mycorrhizal (AM) inoculation were tested. Besides, the sex-specific microbial community structures in the rhizosphere soil of different sexes of Populus cathayana were compared under salt stress. To identify the sex-specific microbial community characteristics related to salinity and AM symbiosis, a combined qPCR and DGGE method was used to monitor microbial community diversity. Seedlings suffered severe pressure by salt stress, reflected in limited growth, biomass, and nutrient element accumulation, especially on females. Exogenous AM inoculation treatment alleviated these negative effects, especially under salt treatment of 75 mM. Compared with salt effect, exogenous AM inoculation treatment showed a greater effect on soil physical–chemical properties of both sexes. Based on DGGE results, salt stress negatively affected fungal richness but positively affected fungal Simpson diversity index, while exogenous AM inoculation treatment showed the opposite effect. Structural equation modeling (SEM) was performed to show the causal relationships between salt and exogenous AM inoculation treatments with biomass accumulation and microbial community: salt and exogenous AM inoculation treatment showed complicated effects on elementary concentrations, soil properties, which resulted in different relationship with biomass accumulation and microbial community. Salt stress had a negative effect on soil properties and microbial community structure in the rhizosphere soil of P. cathayana, whereas exogenous AM inoculation showed positive impacts on most of the soil physical–chemical properties and microbial community status.

Benthic Meiofaunal Diversity in Four Zones of Pichavaram Mangrove Forest, India

2021 ◽  
Vol 51 (4) ◽  
pp. 294-307
Author(s):  
Rengasamy Punniyamoorthy ◽  
Perumal Murugesan ◽  
Gopalan Mahadevan ◽  
Alberto Sanchez
Keyword(s):  
Organic Matter ◽  
Community Structure ◽  
Mangrove Forest ◽  
Environmental Parameters ◽  
The Other ◽  
Sediment Texture ◽  
Field Sampling ◽  
Key Variables ◽  
Sediment Ph ◽  
Richness Index

ABSTRACT The community structure of meiofauna was assessed relative to environmental parameters in four zones (non-mangrove, Avicennia zone, mixed zone, and Rhizophora zone) of Pichavaram Mangrove Forest, which is located along the southeast coast of India. Field sampling was carried out from June 2016–May 2017. The meiofaunal data were evaluated using univariate and multivariate statistics. The highest abundance of meiofauna (434 ind/10 cm−2) was recorded in the Rhizophora zone and the lowest (270 ind/10 cm−2) in the non-mangrove zone. A total of 62 species representing four meiofaunal groups were recorded, including 38 species of foraminifera, 12 species of nematodes, seven species of ostracods, and five species of harpacticoids. Diversity (Shannon H′) mostly ranged from 3–4, and was highest (3.86±0.26) in the Avicennia zone and averaged ∼3.3 in the other three zones. The Margalef richness index was ∼6 in the Avicennia and Rhizophora zones and ∼5 in the non-mangrove and mixed zones. The BIO-ENV and CCA analyses identified sediment texture and organic matter as key variables influencing the distribution of meiofauna, while % calcium carbonate, salinity, and sediment pH were also important. Monitoring studies of meiofaunal taxa may help elucidate their roles in coastal blue-carbon cycling and will also contribute to understanding how mangrove-associated habitats influence meiofaunal distributions.

scholarly journals Biological and Physicochemical Parameters Related to the Nitrogen Cycle in the Rhizospheric Soil of Native Potato (Solanum phureja) Crops of Colombia

2011 ◽  
Vol 2011 ◽  
pp. 1-10
Author(s):  
Nathalia Flórez-Zapata ◽  
Daniel Uribe-Vélez
Keyword(s):  
Organic Matter ◽  
Nitrogen Cycle ◽  
Organic Matter Content ◽  
Chemical Properties ◽  
Matter Content ◽  
Solanum Phureja ◽  
Rhizospheric Soil ◽  
Nitrogen Fixing ◽  
Nitrogen Fixing Bacteria ◽  
Physical Chemical

Nitrogen (N) plays an important role in agricultural production. This study was designed to evaluate the presence of cultivable N cycle-associated microorganisms (nitrogen-fixing bacteria—NFB, proteolytic bacteria—PR, ammonifiers—AMO, ammonium-oxidizing bacteria—AOB, nitrite-oxidizing bacteria—NOB, and denitrifiers—DEN), and their relationship with physical-chemical and agronomic soil descriptors, inSolanum phurejarhizospheric soil samples, from traditional and organic crop management farms. A cluster analysis with the physical and chemical properties of soil, allowed to identify the organic matter content as an important factor that determines the outcome of that grouping. Significant differences () between farms were found in the abundance of this groups, but correlation analysis showed that proteolytic and nitrogen fixing bacteria were the main nitrogen associated functional groups affected by soils' physical-chemical characteristics. The amount of ammonia available is affected by the agricultural management strategy, which consequently affects the NFB abundance. Finally the results showed that PR, protease activity and soil properties related with organic matter transformation has a positive relationship with productivity, which given the high organic matter content of the Andean soils being studied, we conclude that nitrogen mineralization process has an important role in the nitrogen cycle and its bioavailability in this ecosystem.

scholarly journals The Flooded Peat Deposit Characteristic and Assessment of its Impact upon Water Quality in the Boguchansk Reservoir

2012 ◽  
pp. 80-90
Author(s):  
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Chemical Properties ◽  
Peat Deposit ◽  
Physical Chemical ◽  
Peat Deposits

Assessment of the flooded peat deposit in the Boguchansk Reservoir floor impact on the water quality has been performed. Characteristic of the flooded bogs and peat deposits has been given; their physical/chemical properties have been described. Reserves of organic matter, nitrogen and microelements in the peat deposit forecasted for floating have been calculated, their influence on water quality in the reservoir to be designed has been considered. A conclusion on the necessity of monitoring of the flooded in the process of the reservoir exploiting hydromorphic ecosystems has been made.

scholarly journals KOMPOSISI KIMIA SUBSTRAT ASOSIASI SONNERATIA ALBA - AVICENNIA MARINA DI MUARA SUNGAI LEKOK KABUPATEN PASURUAN

1997 ◽  
Vol 3 (2) ◽  
pp. 59
Author(s):  
Hani Sudarmanto ◽  
Mas Loegito ◽  
Trisnadi Widyoleksono C.P. ◽  
Handoko Darmokoesoemo ◽  
Sediono Sediono
Keyword(s):  
Organic Matter ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Mangrove Forest ◽  
Chemical Properties ◽  
Avicennia Marina ◽  
North Coast ◽  
Exchangeable Cation ◽  
The North ◽  
Sonneratia Alba

The mangrove forest occurred in the north coast of Pasuruan Regency have not been reported about the vegetational and substrate compositions. The research's purpose were to analysis the vegetational composition and the chemical properties of the substrate. The result showed that this mangrove forest were dominated by association of Sonneratia alba - Avicennia marina. The result showed that soils had the natural reaction (pH 7.01-7.65), low in organic matter (2.18-4.27 percent) and total nitrogen (0.48-0.51 percent), but high in total phosphorus (15.19-29.22 ppm) and in exchangeable cation (Ca2 plus: 389.855-504.065 mg/100 gr, Mg2 plus: 409.522-441.400 mg/100 gr, K plus: 228.900-390-435 mg/100 gr).

scholarly journals Comparing organic versus conventional soil management on soil respiration

F1000Research ◽  
2018 ◽  
Vol 7 ◽  
pp. 258 ◽  
Author(s):  
Bence Mátyás ◽  
Maritza Elizabeth Chiluisa Andrade ◽  
Nora Carmen Yandun Chida ◽  
Carina Maribel Taipe Velasco ◽  
Denisse Estefania Gavilanes Morales ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Respiration ◽  
Soil Properties ◽  
Organic Material ◽  
Chemical Properties ◽  
Soil Management ◽  
Co2 Production ◽  
Organic Soils ◽  
Physical Chemical ◽  
Organic Farmers

Soil management has great potential to affect soil respiration. In this study, we investigated the effects of organic versus conventional soil management on soil respiration.  We measured the main soil physical-chemical properties from conventional and organic managed soil in Ecuador. Soil respiration was determined using alkaline absorption according to Witkamp.  Soil properties such as organic matter, nitrogen, and humidity, were comparable between conventional and organic soils in the present study, and in a further analysis there was no statically significant correlation with soil respiration. Therefore, even though organic farmers tend to apply more organic material to their fields, but this did not result in a significantly higher CO2 production in their soils in the present study.

scholarly journals Comparative Analysis on Soil Basic Properties Between Southern and Northern Slopes in Funiu Mountain, China

2014 ◽  
Vol 8 (1) ◽  
pp. 636-641
Author(s):  
Chengyuan Hao ◽  
Hebing Zhang ◽  
Jian Zhou
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Spatial Variation ◽  
Total Nitrogen ◽  
Chemical Properties ◽  
Available Nitrogen ◽  
Soil Available Nitrogen ◽  
Physical And Chemical ◽  
Funiu Mountain ◽  
Total Potassium

The spatial variation of soil physical and chemical properties in Funiu Mountain was studied to provide references for identifying soil spatial variation mechanism in bordering land of China warm temperate zone and northern subtropical region. Using vertical gradient sampling and traditional statistics method, the soil samples at the altitude from 1640 m to 1870 m were collected to compare physical and chemical properties between south and north slopes of the Funiu Mountain. The results showed that soil pH, soil organic matter and soil total nitrogen were remarkably correlated with altitude change, but soil electrical conductivity, soil available nitrogen, available phosphors, available potassium, and total potassium were not related to altitude. With the increase of altitude, soil pH and total nitrogen increased, but soil organic matter decreased. Compared with the soil properties of northern slope in Funiu Mountain, soil acidity, electrical conductivity, and available nitrogen were higher in southern slope. Especially, the soil available nitrogen was much higher than the mean value observed in northern slope samples. The contents of soil organic matter, available phosphorus, available potassium, total nitrogen, and total potassium showed no striking difference on between southern and northern slopes. In conclusion, both altitude and slope direction significantly influenced spatial variation of soil properties in Funiu Mountain. It added to the boundary effect of Qinling Mountains, and revealled the interaction mechanism of the environmental elements such as land-climate-soil-ecosystem in Funiu Mountain.

RECOVERY OF PRODUCTIVITY OF ONTARIO SOILS DISTURBED BY AN OIL PIPELINE INSTALLATION

1982 ◽  
Vol 62 (2) ◽  
pp. 267-279 ◽  
Author(s):  
J. L. B. CULLEY ◽  
B. K. DOW ◽  
E. W. PRESANT ◽  
A. J. MacLEAN
Keyword(s):  
Organic Matter ◽  
Crop Yields ◽  
Chemical Properties ◽  
First Year ◽  
Field Crop ◽  
Oil Pipeline ◽  
Soil Mixing ◽  
Right Of Way ◽  
Physical Chemical ◽  
The Right

Measurement of soil properties and field-crop yields on cropland traversed by the Sarnia-Montreal oil pipeline indicated that pipeline isntallation detrimentally affected both crop yields and soil physical-chemical properties in the first year after construction. After 5 yr, relative yields improved although reductions still persisted at most row-cropped sites. However, alfalfa yields at two sites appeared to be unaffected by pipeline construction. Soil mixing and compaction on the right-of-way were most prevalent on medium- to fine-textured soils. Compaction did not appear to be a problem at a coarse-textured site. Soil chemical data indicated that spoil (subsoil) materials from the trench were spread across the right-of-way at most sites. Diluted soil organic matter levels in the right-of-way adversely affected nitrogen status. Medium- to fine-textured right-of-way soils had reduced porosities and hydraulic conductivities, but increased strengths compared with undisturbed adjacent soils.

Sign in / Sign up

Export Citation Format

Share Document