Habitat components and population density drive plant litter consumption by Eudrilus eugeniae (Oligochaeta) under tropical conditions

Michel Mathurin KAMDEM; Albert NGAKOU; Nicolas YANOU NJINTANG

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Habitat components and population density drive plant litter consumption by Eudrilus eugeniae (Oligochaeta) under tropical conditions

机译：Habitat components and population density drive plant litter consumption by Eudrilus eugeniae (Oligochaeta) under tropical conditions

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The ingestion of organic and mineral materials by earthworms is a prominent functional role that has profound consequences for the decomposition and stabilization of soil organic matter. To investigate the litter consumption of the African nightcrawler earthworm Eudrilus eugeniae under different tropical conditions, we used DNA barcoding to identify specimens of E. eugeniae collected from sites across the Adamawa region in Cameroon, and studied the influence of habitat suitability (soil properties),soil moisture, litter type, and population density on litter consumption. A total of four litter consumption experiments were carried out using soils collected from refuse disposal sites, agricultural lands, and savannahs dominated by the Mexican sunflower Tithonia diversifolia. The results revealed that litter consumption significantly increased in the refuse disposal and agricultural soils as opposed to the Mexican sunflower (T. diversifolia) soil, a cow dung enriched substrate, and a sterile soil horizon from the savannah (P 0.05). We observed a general positive density-dependent consumption with litter mass loss increasing with increasing density. Our results suggest that E. eugeniae has a strong direct effect on the decomposition of plant materials than expected from previous estimations, and that litter consumption rates are determined by severalhabitat components and population density.

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《Integrative zoology》 |2021年第2期|255-269|共15页
作者
Michel Mathurin KAMDEM; Albert NGAKOU; Nicolas YANOU NJINTANG;
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作者单位

Department of Zoology & Entomology, University of the Free State–QwaQwa Campus, Phuthaditjhaba, Republic of South Africa;

Department of Biological Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Republic of Cameroon;

Department ofBiological Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Republic of Cameroon;

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正文语种英语
中图分类动物学;
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Habitat components and population density drive plant litter consumption by Eudrilus eugeniae (Oligochaeta) under tropical conditions

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