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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP
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    Abstract - Issue Nov 2022, 43 (6)                                     Back


nstantaneous and historical temperature effects on a-pinene

Earthworm community structure and population dynamics

at Minkong forest of Mokokchung, Nagaland, India

 

L. Jing1, L. Mozhui1, L.N. Kakati2* and L. Thyug3   

 

1Department of Zoology, Nagaland University, Lumami-798 627, India

2Assam Down Town University, Panikhaiti-781 026, India

3Department of Zoology, Kohima Science College, Jotsoma-797 002, India

 

*Corresponding Author Email : lakhmi.kakati1956@gmail.com                      *ORCiD: https://orcid.org/0000-0003-4613-2263

 

Received: 15.10.2021                                                                                                      Revised: 23.03.2022                                                                               Accepted: 14.06.2022

 

 

Abstract

Aim: The present study was undertaken to assess the seasonal variations of density, biomass and community characteristics of earthworms in two different types of forest at Minkong area, Mokokchung.

Methodology: The survey was conducted during the period from January 2019-February 2020 in two areas viz., mixed forest and plantation. Standard methods were followed to determine the ecological categories of earthworms, density and biomass, relative abundance and species richness as well as for determination of different soil parameters viz., pH, moisture, bulk density, organic carbon, total and available nitrogen, available phosphorus and potassium.

Results: 12 number earthworm species viz., Amynthas corticis (Kinberg), Amynthus gracilis (Kinberg), Drawida assamensis (Gates), Drawida hodgarti (Stephenson), Drawida nepalensis (Michaelsen), Drawida sp., Eutyphoeus assamensis (Stephenson), Eutyphoeus festivus (Gates) Metaphire houlleti (Perrier), Perionyx excavatus (Perrier), Perionyx simlaensis (Michaelsen) and Pontoscolex corethurus (Müller) were recorded. Dominant earthworm species in both the areas were D. nepalensis, P. excavatus, Drawida sp. and E. festivus. The Shannon diversity, Simpson diversity and Pielou’s species evenness were 2.17, 0.87 and 0.87 in mixed forest and 2.05, 0.86, 0.86 in plantation. The earthworm density and biomass were greater in plantation (276.74 ind m-2 and 338.47g m-2) compared to mixed forest (230.52 ind m-2 and 254.55 g m-2).

Interpretation: As earthworm community characteristics differ depending on the type of forest, therefore, earthworm’ sdiversity and its indices can be used as an ecological indicator of anthropogenic disturbances and can help designing conservation programs for reclaiming the depleted areas.

Key words: Biomass, Earthworm diversity, Minkong, Relative abundance, Subtropical ecosystem

 

 

 

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