NEIGAE OpenIR  > 湿地生态系统管理学科组
Understand the resilience and regime shift of the wetland ecosystem after human disturbances
H. X. Liu, C. Y. Gao and G. P. Wang
2018
Source PublicationScience of the Total Environment
Volume643Pages:1031-1040
Other AbstractWetland protection and restoration are important for human's sustainable development, and assess the resilience and regime shift of wetland ecosystem under human disturbances is necessary for this purpose. Geochemical records, including nitrogen (N), phosphorus (P), heavy metals and polycyclic aromatic hydrocarbons (PAHs) from seven wetland cores dated by Pb-210 and Cs-137 analysis were used to identify the historical background of human disturbances on wetlands in the Sanjiang Plain. We also carried out paleoecological analysis (including plant macrofossils and diatoms) in one core (Honghe wetland) to reconstruct the successions of wetland ecological communities. The resilience and regime shift of ecosystem were evaluated based on autocorrelation and the Sequential t-test analysis of regime-shifts algorithm. Our results show that enrichment factors (EFs) of N, P and heavy metals (Cu, Zn, Pb etc.), and the concentrations of PAHs experienced slight increases from the 1920s but dramatic increases from the late 1970s. The dominant species of plant community began to change from Drepanocladus aduncus to Carex lasiocarpa from the late 1970s, and the diatoms began to change from wet-indicator to dry-indicator species from the 1950s in Honghe wetland. The regime shift of the wetland ecosystem occurred around 1990 CE, which due to a drop in water level caused by human activities, such as wetland drainage for the reclamation and the excessive use of groundwater for irrigation purpose, rather than climate moisture variations. There is a time gap between the severe disturbances and regime shift due to the stronger resilience of wetland ecosystem. The ecological characteristics (e.g. water level, biological compositions, and EFs of nutrient elements and heavy metals) of Honghe wetland before the late 1970s (release phase) were used as reference conditions for wetland restoration. (C) 2018 Elsevier B.V. All rights reserved.
Document Type期刊论文
Identifierhttp://ir.iga.ac.cn/handle/131322/9277
Collection湿地生态系统管理学科组
Recommended Citation
GB/T 7714
H. X. Liu, C. Y. Gao and G. P. Wang. Understand the resilience and regime shift of the wetland ecosystem after human disturbances[J]. Science of the Total Environment,2018,643:1031-1040.
APA H. X. Liu, C. Y. Gao and G. P. Wang.(2018).Understand the resilience and regime shift of the wetland ecosystem after human disturbances.Science of the Total Environment,643,1031-1040.
MLA H. X. Liu, C. Y. Gao and G. P. Wang."Understand the resilience and regime shift of the wetland ecosystem after human disturbances".Science of the Total Environment 643(2018):1031-1040.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[H. X. Liu, C. Y. Gao and G. P. Wang]'s Articles
Baidu academic
Similar articles in Baidu academic
[H. X. Liu, C. Y. Gao and G. P. Wang]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[H. X. Liu, C. Y. Gao and G. P. Wang]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.