SCIENTIA GEOGRAPHICA SINICA ›› 2016, Vol. 36 ›› Issue (2): 247-255.doi: 10.13249/j.cnki.sgs.2016.02.011

• Orginal Article • Previous Articles     Next Articles

The Key Factor of Impact on Temporal and Spatial Variation of Soil Organic Matter, TN and TP in Coastal Salt Marsh: Tide and Vegetation

Jinxin Wang(), Wei Zhang, Nan Guo, Chao Li, Jinshu Wang()   

  1. College of Urban and Environment, Jiangsu Normal University, Xuzhou, 221116 Jiangsu, China
  • Received:2015-04-16 Revised:2015-08-02 Online:2016-02-20 Published:2016-02-20
  • Supported by:
    National Nature Sciences Foundation of China(41271122 & 31100361)

Abstract:

Coastal salt marshes are important terrestrial ecosystems, soil is one of the main accumulation pools of the organic carbon, nitrogen and phosphorus, which plays an important role in the global carbon, nitrogen and phosphorus cycles. In order to better define particularity of SOM, TN, and TP distribution along the spatial gradient about interactions between the tide and of vegetation, the contents of SOM, TN, and TP were seasonally measured along two elevational gradients of a coastal salt marsh of eastern China. Main results are as follows, the tide and vegetation interaction is factor of impact on temporal and spatial variation of SOM, TN, and TP in coastal salt marsh, with respect to the effects of tidal influence vegetation is more stable and persistent; Spatial and month variation of SOM and TN content of salt marsh are significant, spatial variation includes change along gradient of vegetation (tide) and differences between the (tidal currents) of transects, the content of vegetation zone is higher than that of tidal flat along gradient of vegetation (tide), the content of SOM, TN, and TP show decreasing from sea to land on vegetation zones, that is Spartina alterniflora>Suaeda salsa>Aeluropus littoralis>Phragmites australis; Difference between two transects of SOM shows that content of SOM, TN, and TP far tidal creeks greater than that of near tidal creek at low salt marsh, and content of SOM, TN, and TP near tidal creek greater than that of far tidal creeks at median salt marsh, spatial and temporal variation of TP is not significant; pH, soil moisture, salt content and other directly related to the tidal effect factor are negative correlation to distance away from the sea, contents of SOM, TN, and TP are also negative correlation to distance away from the sea, and the contents of SOM, TN, and TP are positively correlated to pH, soil moisture and salt content and other factors, to a certain extent, it explained that tidal influence on contents and variation of SOM, TN, and TP.

Key words: SOM, TN, TP, temporal and spatial distribution, vegetation distribution, tide

CLC Number: 

  • X142/Q178.531