scholarly journals Change of Soil Protozoa Community Structure under Different Farming Practices

2012 ◽  
Vol 11 (17) ◽  
pp. 3140-3147
Author(s):  
Zhi-Ping Cao ◽  
Si-Hai Zhang ◽  
Yun-Feng Cheng ◽  
Guo Zhang
Keyword(s):  
Community Structure ◽  
Farming Practices ◽  
Soil Protozoa

Soil protozoa—An intensive study of population dynamics and community structure in an upland grassland

2006 ◽  
Vol 33 (2) ◽  
pp. 137-151 ◽  
Author(s):  
Genoveva F. Esteban ◽  
Ken J. Clarke ◽  
José L. Olmo ◽  
Bland J. Finlay
Keyword(s):  
Population Dynamics ◽  
Community Structure ◽  
Intensive Study ◽  
Soil Protozoa ◽  
Upland Grassland

THE IMPLEMENTATION OF MYORGANIC: A CASE STUDY OF KOPERASI ABSB

2018 ◽  
Vol 13 (Number 2) ◽  
pp. 78-87
Author(s):  
Sabariyah Hoyaeli ◽  
Zakirah Othman ◽  
Iswandi Anas ◽  
Shafini M. Shafie
Keyword(s):  
Qualitative Method ◽  
Daily Routine ◽  
Staple Food ◽  
Farming Practices ◽  
Organic Farms ◽  
External Audit ◽  
Agriculture Industry ◽  
The Government ◽  
Organic Standards

Rice is a staple food and daily routine for Malaysians. Currently, the increasing population in Malaysia has led to the need to increase rice production with more quality. Therefore,the government established a scheme with national organic standards, MS 1259: 2015 which is myOrganic certification to recognize organic farms. Koperasi ABSB is the first rice farm that obtained this certification. Thus, the aims of this study are to explore the implementation of myOrganic in Koperasi ABSB and the barriers faced by this cooperative to implementing myOrganic certification. Qualitative method is used in this case study through interviews and observation. The finding showed that the implementation of myOrganic is as follows, by register myGAP, register myOrganic, Department of Agricultural Malaysia (DOA) will send a supervisor, prepare nine files or records, perform internal and external audit, and renew myOrganic. This study is expected to increase awareness of organic farming practices and promote the implementation of myOrganic in agriculture industry especially for the new farmer who wants to register and obtain myOrganic certification.

STRUKTUR KOMUNITAS MAKRO ALGA DI PESISIR PULAU KECAMATAN BULANG

SIMBIOSA ◽  
2014 ◽  
Vol 3 (2) ◽  
Author(s):  
Notowinarto Notowinarto ◽  
Ramses Ramses ◽  
Mulhairi Mulhairi
Keyword(s):  
Community Structure ◽  
Diversity Index ◽  
Algal Species ◽  
Algal Communities ◽  
Marine Life ◽  
Ph Values ◽  
Abundance Patterns ◽  
Coastal Marine ◽  
Temperature Parameter ◽  
Important Value Index

Bulang districts Batam Islands of  Riau province (Riau Islands), its consists of many islands with as well as having the potential diversity of coastal marine life in particular kinds of macro algae or seaweed. Conducted research aimed to determine the structure of macro- algal communities in the intertidal zone islands. The results of the identification of algal species found 16 species are: the Order of Chlorophyceae as 6 spesies; Order Phaeophyceae as 2 spesies; and Order Rhodophyceae as 8 spesies. The community structure at the five stations showed the highest values were found in the island of dominance Cicir (D ' = 0.79) , uniformity index values on Tengah Island (E ' = 0.99) , while the island Balak had the highest diversity index (H ' = 0.88) , with the abundance patterns of population structure on the island is pretty good Central . Results of correlation analysis of regression between IVI types of algae with the conditions of environmental quality suggests that there is a significance (Fhit ˃ F table and the value of r = > 90 %) between IVI algae Halimeda sp and Cryptarachne polyglandulosa at each station with a temperature parameter surface (⁰C) , depth temperature (⁰C) and pH values. Keywords : Algae, Community Structure, Important Value Index.

Seasonal changes in phytoplankton community structure in a bioluminescent lagoon, St. Croix, US Virgin Islands

2018 ◽  
Vol 81 (2) ◽  
pp. 109-124 ◽  
Author(s):  
JL Pinckney ◽  
C Tomas ◽  
DI Greenfield ◽  
K Reale-Munroe ◽  
B Castillo ◽  
...  
Keyword(s):  
Community Structure ◽  
Seasonal Changes ◽  
Phytoplankton Community ◽  
Virgin Islands ◽  
Phytoplankton Community Structure ◽  
Us Virgin Islands

Temporally invariable bacterial community structure in the Arabian Sea oxygen minimum zone

2014 ◽  
Vol 73 (1) ◽  
pp. 51-67 ◽  
Author(s):  
A Jain ◽  
M Bandekar ◽  
J Gomes ◽  
D Shenoy ◽  
RM Meena ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Arabian Sea ◽  
Oxygen Minimum Zone ◽  
Minimum Zone ◽  
Oxygen Minimum

Effects of resuspension of eastern oyster Crassostrea virginica biodeposits on phytoplankton community structure

2020 ◽  
Vol 640 ◽  
pp. 79-105
Author(s):  
ET Porter ◽  
E Robins ◽  
S Davis ◽  
R Lacouture ◽  
JC Cornwell
Keyword(s):  
Water Quality ◽  
Community Structure ◽  
Crassostrea Virginica ◽  
Skeletonema Costatum ◽  
Eastern Oyster ◽  
Energy Dissipation Rate ◽  
Negative Effects ◽  
Cell Densities ◽  
Sediment Bottom ◽  
Nitrite Nitrate

Anthropogenic disturbances in the Chesapeake Bay (USA) have depleted eastern oyster Crassostrea virginica abundance and altered the estuary’s environment and water quality. Efforts to rehabilitate oyster populations are underway; however, the effect of oyster biodeposits on water quality and plankton community structure are not clear. In July 2017, we used 6 shear turbulence resuspension mesocosms (STURMs) to determine differences in plankton composition with and without the daily addition of oyster biodeposits to a muddy sediment bottom. STURM systems had a volume-weighted root mean square turbulent velocity of 1.08 cm s-1, energy dissipation rate of ~0.08 cm2 s-3, and bottom shear stress of ~0.36-0.51 Pa during mixing-on periods during 4 wk of tidal resuspension. Phytoplankton increased their chlorophyll a content in their cells in response to low light in tanks with biodeposits. The diatom Skeletonema costatum bloomed and had significantly longer chains in tanks without biodeposits. These tanks also had significantly lower concentrations of total suspended solids, zooplankton carbon, and nitrite +nitrate, and higher phytoplankton carbon concentrations. Results suggest that the absence of biodeposit resuspension initiates nitrogen uptake for diatom reproduction, increasing the cell densities of S. costatum. The low abundance of the zooplankton population in non-biodeposit tanks suggests an inability of zooplankton to graze on S. costatum and negative effects of S. costatum on zooplankton. A high abundance of the copepod Acartia tonsa in biodeposit tanks may have reduced S. costatum chain length. Oyster biodeposit addition and resuspension efficiently transferred phytoplankton carbon to zooplankton carbon, thus supporting the food web in the estuary.

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