Relation of Desert Vegetation Species Diversity and Aboveground Biomass to Groundwater Depth in the Lower Reaches of Tarim River

doi:10.7522/j.issn.1000-694X.2016.00069

JOURNAL OF DESERT RESEARCH ›› 2017, Vol. 37 ›› Issue (4): 724-732.DOI: 10.7522/j.issn.1000-694X.2016.00069

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Relation of Desert Vegetation Species Diversity and Aboveground Biomass to Groundwater Depth in the Lower Reaches of Tarim River

Bai Yufeng¹, Xu Hailiang², Zhang Pei², Zhang Guangpeng¹, Ling Hongbo²

1. College of Forestry and Horticulture, Xinjiang Agricultural University, Urumqi 830052, China;
2. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China

Received:2016-04-05 Revised:2016-05-23 Online:2017-07-20 Published:2017-07-20

Abstract

Abstract: Transect is an efficient way to make a study about plant communities changes alone the gradients of environmental factors,this paper makes a transect study on desert vegetation species diversity and aboveground biomass alone gradients of groundwater depth in the lower reaches of Tarim River.The results showed that (1) Regression analysis of diversity indices (including Margalaf index,Pielou index,Shannon-Wiener index and Simpson index) and groundwater depth showed an extremely significant negative correlation (P<0.01),diversity indices decreased with the increase of groundwater depth,groundwater depth is one of the important factors that affecting the species diversity.(2) Regression analysis of total aboveground biomass of desert vegetation and groundwater depth also shows an extremely significant negative correlation (P<0.01),aboveground biomass decreased from 912.21 g·m^-2 to less than 30 g·m^-2 when groundwater depth changed from 3 to 7 meter,groundwater depth is the main factors that affecting the aboveground biomass and its distribution.(3) Regression analysis of diversity indices and aboveground biomass showed an significant positive correlation (P<0.05),that is,aboveground biomass increased with the increase of diversity indices.The research is helpful to ecological restoration of the lower reaches of the Tarim River and to provide theoretical basis and reference for the environmental protection.

Key words: species diversity, aboveground biomass, groundwater depth, transect, Tarim River

CLC Number:

Q948.11

Bai Yufeng, Xu Hailiang, Zhang Pei, Zhang Guangpeng, Ling Hongbo. Relation of Desert Vegetation Species Diversity and Aboveground Biomass to Groundwater Depth in the Lower Reaches of Tarim River[J]. JOURNAL OF DESERT RESEARCH, 2017, 37(4): 724-732.

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Relation of Desert Vegetation Species Diversity and Aboveground Biomass to Groundwater Depth in the Lower Reaches of Tarim River

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