SCIENTIA GEOGRAPHICA SINICA ›› 2015, Vol. 35 ›› Issue (4): 491-497.doi: 10.13249/j.cnki.sgs.2015.04.491

• Orginal Article • Previous Articles     Next Articles

The Characteristics of Fluxes of Natural Removal of Dichlorobenzene from Atmosphere in A Coastal Salt Marsh of Northern Jiangsu

Jin-xin WANG, Qiao-hua HUANG, Chao LI, Wei ZHANG, Nan GUO, Jin-shu WANG()   

  1. College of Urban and Environment, Jiangsu Normal University, Xuzhou, Jiangsu 221116,China
  • Received:2014-01-07 Revised:2014-03-07 Online:2015-04-20 Published:2015-04-20

Abstract:

Dichlorobenzene (DCB) is used primarily as a chemical intermediate, or as solvent and has adverse effects on animals and humans. The fluxes of DCB were measured seasonally using static flux chambers along an elevational gradient of a coastal salt marsh of eastern China. Main results are as follows, DCB of the atmosphere may be from external input of seawater in the study area, the plant and the soil of coastal salt marsh ecosystem are important sink of DCB, natural removal flux of soil and plant roots is more than that of above ground biomassof plant, its strength has significant species dependent. Seasonal variation of natural absorption flux of DCB is significant, it is from the seasonal difference of natural absorption capacity from higher plants, their rhizosphere environment, and the sensitivity degree of response to ecological factors. Significant spatial heterogeneity of natural absorption capacity of DCB is significant, it were closely correlated with species dependence of absorptive capacity. Therefore, the plant is an important part of the natural removal of DCB in atmosphere, and has a significant influence on the temporal and spatial variation characteristics. The spatial difference of plant species, biological activity and ecological factors that infect on biological activity of plant in salt marsh ecosystem are important factors that impact on spatial heterogeneity of natural absorption capacity of DCB, the presence of standing litter of the plant could also have an impact on natural absorption of DCB of atmosphere, even in no growth season that biological activity of plant is lower.

Key words: DCB, species dependence, spatial heterogeneity, seasonal variation

CLC Number: 

  • X142/Q178.531