Seasonal changes impact soil bacterial communities in a rubber plantation on Hainan Island, China

Lan Guoyu, Li Yuwu, Lesueur Didier, Wu Zhixiang, Xie Guishui. 2018. Seasonal changes impact soil bacterial communities in a rubber plantation on Hainan Island, China. Science of the Total Environment, 626 : 826-834.

https://doi.org/10.1016/j.scitotenv.2018.01.147

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

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Quartile : Q1, Sujet : ENVIRONMENTAL SCIENCES

Résumé : Rubber plantations have expanded rapidly over the past 20 years in tropical Asia and their impacts on regional ecosystems have garnered much concern. While much attention has been given to the negative impacts on aboveground diversity and function, the belowground bacterial soil community has received much less attention. Here, we investigated the community composition and diversity of soil bacteria of rubber plantations on Hainan Island in south China. The goals of the study were to describe changes in bacterial compositions and diversity across seasons. We found that seasonality defined by differences in rainfall amount strongly influenced bacterial communities. At both the Phylum and Family levels, we found significant differences in the total number of taxa, as well as the composition of the community as a function of season. Diversity of soil samples in the dry-rainy season was highest of three seasons, suggesting that bacterial structure was more sensitive in alternate periods of season. Diversity in the rainy season was substantial lower than in dry season. Results from a redundancy analysis showed that seasonal changes explained the largest part (31.9%) of the total variance of bacterial community composition. In conclusion, seasonal change had the greatest influence on bacterial communities, which overshadowed the effects of soil nutrient as well as other factors, and controls the bacterial communities in soils of RP in tropical region of Hainan.

Mots-clés Agrovoc : Hevea brasiliensis, Bacteria, sol, variation saisonnière, plantation

Mots-clés géographiques Agrovoc : Hainan

Mots-clés libres : Bacterial composition, Community diversity, Seasonal effect, Rubber plantations

Classification Agris : P34 - Biologie du sol
F01 - Culture des plantes
P40 - Météorologie et climatologie

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

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