scholarly journals Nutrient Status of Vermicompost of Urban Green Waste Processed by Three Earthworm Species—Eisenia fetida, Eudrilus eugeniae,andPerionyx excavatus

2010 ◽  
Vol 2010 ◽  
pp. 1-13 ◽  
Author(s):  
Swati Pattnaik ◽  
M. Vikram Reddy
Keyword(s):  
Eisenia Fetida ◽  
Nutrient Status ◽  
Physical Parameters ◽  
Eudrilus Eugeniae ◽  
Perionyx Excavatus ◽  
Nutrient Contents ◽  
Urban Green ◽  
Green Waste ◽  
Earthworm Species ◽  
Vegetable Market Waste

Major nutrient status of vermicompost of vegetable market waste (MW) and floral waste (FW) processed by three species of earthworms namely,Eudrilus eugeniae, Eisenia fetida, andPerionyx excavatusand its simple compost were assessed across different periods in relation to their respective initiative substrates. Their physical parameters—temperature, moisture, pH, and electrical conductivity—were also recorded. The nutrients—nitrogen, phosphorus, potassium, calcium, and magnesium—increased in the vermicompost and compost while the organic carbon, C/N and C/P ratios decreased as the composting process progressed from 0 to 15, 30, 45, and 60 days. The nutrient statuses of vermicomposts of all earthworm species produced from both the wastes were more than that of the compost and that of their respective substrates. Moreover, the vermicompost produced byE. eugeniaepossessed higher nutrient contents than that ofE. fetida, P. excavatus, and compost. The MW showed higher nutrient contents than the FW. Thus, vermicomposting is the paramount approach of nutrient recovery of urban green waste.

scholarly journals Metagenomic Exploration of Bacterial Community Structure of Earthworms’ Gut

2021 ◽  
Author(s):  
Samrendra Singh Thakur ◽  
Azhar Rashid Lone ◽  
Nalini Tiwari ◽  
Subodh Kumar Jain ◽  
Shweta Yadav
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Gut Microbiota ◽  
Bacterial Community Structure ◽  
Alpha Diversity ◽  
Eudrilus Eugeniae ◽  
Phenotypic Analysis ◽  
Perionyx Excavatus ◽  
Gram Negative ◽  
Earthworm Species

Living organisms are naturally bestowed with unique and imitable qualities for maintaining ecological balance and earthworms are no exceptions. These so-called keystone species of terrestrial ecosystems are equipped with wonderful machinery, allowing them to nurture soil beautifully. Earthworm gut represents a potential microbial reservoir, having a complex interdependence with the host. The study aimed to profile bacterial community structure of three earthworm species belonging to two different life forms; Perionyx excavatus and Eudrilus eugeniae (epigeic), Polypheretima elongata (endogeic) respectively. Diversity analysis using 16S amplicon sequencing revealed that the dominant phyla were Proteobacteria (34.17-77.88) followed by Actinobacteria (13.43-35.54%), Firmicutes (1.69-15.45%) and Bacteroidetes (0.51-8.12%). The alpha diversity indices explicit similar gut microbiota of Perionyx excavatus and Eudrilus eugeniae and while higher alpha diversity was recorded in comparison to Polypheretima elongata gut. The taxonomic to the phenotypic annotation of 16S rRNA metagenomes revealed that dominance of Gram-negative bacterial community in all earthworm species while, Polypheretima elongata comprises higher percentage (78%) of Gram-negative bacterial community to Perionyx excavatus (32.3%) and Eudrilus eugeniae (38.3%). The oxygen requirement phenotypic analysis showed that all earthworm species were abundant with aerobic followed by anaerobic bacterial groups. Furthermore, functional metabolism phenotypic analysis revealed that a high abundance of ammonia oxidizers (29.3-80.2%), the gut microbiomes showed the relative abundance of sulphate reducer (22.6-78.7%), nitrite reducer (19.8-73.2%), dehalogenators (12.6-25.1%), illustrating in the role of these microbial communities in various degradation and bioremediation processes. The present study signifies the intrinsic gut microbiota of earthworm species for intensified biodegradation.

scholarly journals Vermicomposting potential and plant nutrient contents in rice straw vermicast of Perionyx excavatus and Eudrilus eugeniae

2012 ◽  
Vol 7 (42) ◽  
pp. 3639-3645 ◽  
Author(s):  
Yi Wei Yan ◽  
Azwady Abd Aziz Nor ◽  
Hj Shamsuddin Zulkifli ◽  
Mustafa Muskhazli ◽  
Abd Aziz Suraini ◽  
...  
Keyword(s):  
Rice Straw ◽  
Plant Nutrient ◽  
Eudrilus Eugeniae ◽  
Perionyx Excavatus ◽  
Nutrient Contents

scholarly journals Die subletale effekte van die organochloriede dieldrien en lindaan op groei en voortplanting van Eudrilus eugeniae en Eisenia fetida (Oligochaeta)

1994 ◽  
Vol 13 (1) ◽  
pp. 21-24 ◽  
Author(s):  
Editorial Office
Keyword(s):  
Environmental Quality ◽  
Eisenia Fetida ◽  
Reproductive Activity ◽  
Eudrilus Eugeniae ◽  
Sperm Ultrastructure ◽  
Experimental Exposure ◽  
Pesticide Concentration ◽  
Earthworm Species ◽  
Sublethal Concentrations

Experimental exposure of the earthworm species Eudrilus eugeniae to organochlorines showed that dieldrin causes damage to sperm ultrastructure when viewed electronmicroscopically. Worms containing concentrations of 7,27 mg/kg dieldrin and higher showed more than 10% sperm damage. Exposure of Eisenia fetida to sublethal concentrations of lindane did not result in sperm damage but demonstrated an increase in growth and reproductive activity. It is argued that quantification of sperm damage and correlation with pesticide concentration could provide a useful tool for evaluating environmental quality. Furthermore, the effects of sublethal concentrations of pesticides that manifest themselves in increased growth and reproductive activity could affect ecological balances.

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