Effects of metals on life cycle parameters of the earthworm Eisenia fetida exposed to field-contaminated, metal-polluted soils

2007 ◽  
Vol 149 (1) ◽  
pp. 44-58 ◽  
Author(s):  
Johanne Nahmani ◽  
Mark E. Hodson ◽  
Stuart Black
Keyword(s):  
Life Cycle ◽  
Eisenia Fetida ◽  
Polluted Soils

scholarly journals Natural Surface Hydrocarbons and Soil Faunal Biodiversity: A Bioremediation Perspective

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2358
Author(s):  
Sara Remelli ◽  
Pietro Rizzo ◽  
Fulvio Celico ◽  
Cristina Menta
Keyword(s):  
Eisenia Fetida ◽  
Soil Fauna ◽  
Terrestrial Ecosystems ◽  
Soil Sampling ◽  
Folsomia Candida ◽  
Total Abundance ◽  
Polluted Soils ◽  
Natural Oil ◽  
Oil Seepage ◽  
Diptera Larvae

Hydrocarbon pollution threatens aquatic and terrestrial ecosystems globally, but soil fauna in oil-polluted soils has been insufficiently studied. In this research, soil hydrocarbon toxicity was investigated in two natural oil seepage soils in Val D’Agri (Italy) using two different approaches: (i) toxicological tests with Folsomia candida (Collembola) and Eisenia fetida (Oligochaeta) and (ii) analysis of abundance and composition of micro- and meso-fauna. Soil sampling was done along 20 m-transepts starting from the natural oil seepages. Toxicological testing revealed that no exemplars of F. candida survived, whereas specimens of E. fetida not only survived but also increased in weight in soils with higher PAH concentrations, although no reproduction was observed. Analysis on microfauna showed that Nematoda was the most abundant group, with distance from seepages not affecting its abundance. Arthropoda results showed that Acarina, Collembola and Diptera larvae represented the most abundant taxa. The highest divergence in community composition was found between soils situated near seepages and at 5 m and 10 m distance. Arthropoda taxa numbers, total abundance and Acarina were lower in soils with high PAH concentration, while Diptera larvae were not significantly affected. Earthworms, together with Nematoda and Diptera larvae, could therefore represent ideal candidates in PAH degradation studies.

scholarly journals Die invloed van ouderdom op die komposterings - koers van organiese materiaal deur Eisenia fetida (Oligochaeta)

1995 ◽  
Vol 14 (4) ◽  
pp. 111-113
Author(s):  
Editorial Office
Keyword(s):  
Life Cycle ◽  
Environmental Factors ◽  
Age Structure ◽  
Eisenia Fetida ◽  
Sexual Maturity ◽  
Organic Waste ◽  
Optimal Conditions ◽  
Population Densities ◽  
Maximum Peak

One of the main objectives of a vermicomposting plant is to achieve a maximum composting rate of organic waste. Apart from population densities, substrate characteristics and environmental factors, age structure of the population is expected to affect the rate of composting. The composting rate of worms was studied in the laboratory under optimal conditions over a period of 55 days. Growth and sexual maturity were monitored as well as the composting rate during various stages of the life-cycle of Eisenia fetida. The composting rate was initially slow and reached a maximum peak when the worms were pre-clitellate.

scholarly journals Nickel excess affects phenology and reproductive attributes of Asterella wallichiana and Plagiochasma appendiculatum growing in natural habitats

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Anil Sharma ◽  
Madhu Bhagat ◽  
Mohammad Urfan ◽  
Bilal Ahmed ◽  
Anima Langer ◽  
...  
Keyword(s):  
Life Cycle ◽  
Morphological Traits ◽  
Reproductive Organs ◽  
Population Viability ◽  
Frequency Of Occurrence ◽  
Induced Responses ◽  
Natural Habitats ◽  
Polluted Soils ◽  
Spore Viability ◽  
Negative Impacts

AbstractBryophytes are potent metal absorbers, thriving well on heavy metal (HM)-polluted soils. Mechanisms controlling uptake, compartmentalization and impacts of HMs on bryophytes life cycle are largely unknown. The current study is an effort to decipher mechanisms of nickel (Ni) excess-induced effects on the phenological events of two bryophytes, Asterella wallichiana and Plagiochasma apendiculatum growing in natural habitats. Observations revealed Ni-excess induced negative impacts on abundance, frequency of occurrence of reproductive organs, population viability and morphological traits, spore viability and physiological attributes of both the liverworts. Results led us conclude that P. appendiculatum survived better with the lowest impact on its life cycle events than A. wallichiana under Ni excess in natural habitats. Our findings collectively provide insights into the previously unknown mechanisms of Ni-induced responses in liverworts with respect to phenological attributes, as well as demonstrate the potential of P. appendiculatum to survive better in Ni excess habitats.

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