|Table of Contents|

Relationship Between Carbon Storage and Respiration in Different Wetland Ecosystems in the Yellow River

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2021年16
Page:
94-101
Research Field:
Publishing date:

Info

Title:
Relationship Between Carbon Storage and Respiration in Different Wetland Ecosystems in the Yellow River
Author(s):
ZHAO Shufang1HU Yao2
(1.College of Humanities and Arts,Xi′an Internation University,Xi′an,Shaanxi 710077;2.College of Resources and Environment,Aba Normal University,Aba,Sichuan 623002)
Keywords:
Yellow Riverwetlandsvorticity correlationecosystem carbon fluxcarbon storage
PACS:
-
DOI:
10.11937/bfyy.20204375
Abstract:
Taking the wetland reserve of the Yellow River Basin as the research object.By using the vorticity correlation method,the respiration flux of different wetland ecosystems in the Yellow River delta was observed,and the carbon reserves of different wetland vegetation and soil organic carbon reserves were measured,and the relationship between carbon reserves and respiration of different wetland ecosystems was discussed,the mechanism of wetland carbm cycle was explored,in order to provide reference for protecting wetlands.The results showed that,on a seasonal scale,the vegetation growth season of different wetlands in the Yellow River delta had significant carbon sink function,and the ecosystem respiration (Rs) showed an inverted ‘V’ pattern with the increase of months,reaching its maximum in August.Ecosystem carbon exchange (NEE) and ecosystem total primary productivity (GPP) showed a ‘V’ pattern as the months increase,reaching their peak in August.The distribution of vegetation biomass and carbon storage in different wetlands was basically the same,in which the aboveground biomass was higher than the underground biomass.The carbon storage of vegetation was generally shown as Phragmites>Cyperaceae>Polygonum hydropiper>Phalaris arundinacea, and the carbon storage of vegetation in different wetland communities were significantly different (P<0.05).Both soil organic carbon content and organic carbon storage showed consistent change trend,among which the topsoil was the highest and gradually decreased with the increase of soil depth.The soil organic carbon content below 20-40 cm had relatively small variation range.The soil organic carbon content in 80-100 cm was the lowest.Soil organic carbon storage and vegetation carbon storage were positively correlated with ecosystem carbon respiration.There was no significant correlation between GPP and PAR and vegetation carbon and organic carbon storage,and PAR was negatively correlated with organic carbon and organic carbon storage.From the perspective of absolute correlation coefficient,the correlation coefficient with soil organic carbon storage was higher than that of vegetation carbon storage,and the absolute correlation coefficient of Phragmites and Cyperaceae were higher than that of Polygonum hydropiper and Phalaris arundinacea.The path coefficients of soil organic carbon reserve and vegetation carbon reserve on NEE were 0.52 and 0.43,respectively,indicating that soil organic carbon reserve and vegetation carbon reserve directly affect NEE flux of Phragmites wetland in the Yellow River delta,while Rs indirectly affect NEE flux.In addition,photosynthetic effective radiation showed a significant negative correlation with NEE,that was,with the enhancement of PAR,the carbon sequestration capacity of Phragmites wetland ecosystem was gradually enhanced.This indicates that soil organic carbon reserve can better indicate the change of NEE flux.

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Last Update: 2021-12-03