中国地理科学 ›› 2018, Vol. 28 ›› Issue (3): 374-385.doi: 10.1007/s11769-018-0955-5

• 论文 • 上一篇    下一篇

Soil Organic Carbon Contents and Stocks in Coastal Salt Marshes with Spartina alterniflora Following an Invasion Chronosequence in the Yellow River Delta, China

ZHANG Guangliang, BAI Junhong, JIA Jia, WANG Xin, WANG Wei, ZHAO Qingqing, ZHANG Shuai   

  1. State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China
  • 收稿日期:2017-06-09 修回日期:2017-09-08 出版日期:2018-06-27 发布日期:2018-04-27
  • 通讯作者: BAI Junhong.E-mail:junhongbai@163.com E-mail:junhongbai@163.com
  • 基金资助:

    Under the auspices of the National Key R & D Program of China (No. 2017YFC0505906), the National Natural Science Foundation of China (No. 51639001, 51379012), the Interdiscipline Research Funds of Beijing Normal University

Soil Organic Carbon Contents and Stocks in Coastal Salt Marshes with Spartina alterniflora Following an Invasion Chronosequence in the Yellow River Delta, China

ZHANG Guangliang, BAI Junhong, JIA Jia, WANG Xin, WANG Wei, ZHAO Qingqing, ZHANG Shuai   

  1. State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China
  • Received:2017-06-09 Revised:2017-09-08 Online:2018-06-27 Published:2018-04-27
  • Contact: BAI Junhong.E-mail:junhongbai@163.com E-mail:junhongbai@163.com
  • Supported by:

    Under the auspices of the National Key R & D Program of China (No. 2017YFC0505906), the National Natural Science Foundation of China (No. 51639001, 51379012), the Interdiscipline Research Funds of Beijing Normal University

摘要:

Plant invasion alters the fundamental structure and function of native ecosystems by affecting the biogeochemical pools and fluxes of materials and energy. Native (Suaeda salsa) and invasive (Spartina alterniflora) salt marshes were selected to study the effects of Spartina alterniflora invasion on soil organic carbon (SOC) contents and stocks in the Yellow River Delta. Results showed that the SOC contents (g/kg) and stocks (kg/m2) were significantly increased (P < 0.05) after Spartina alterniflora invasion of seven years, especially for the surface soil layer (0-20 cm). The SOC contents exhibited an even distribution along the soil profiles in native salt marshes, while the SOC contents were gradually decreased with depth after Spartina alterniflora invasion of seven years. The natural ln response ratios (LnRR) were applied to identify the effects of short-term Spartina alterniflora invasion on the SOC stocks. We also found that Spartina alterniflora invasion might cause soil organic carbon losses in a short-term phase (2-4 years in this study) due to the negative LnRR values, especially for 20-60 cm depth. And the SOCD in surface layer (0-20 cm) do not increase linearly with the invasive age. Spearman correlation analysis revealed that silt + clay content was exponentially related with SOC in surface layer (Adjusted R2=0.43, P < 0.001), suggesting that soil texture could play a key role in SOC sequestration of coastal salt marshes.

关键词: plant invasion, soil organic carbon, salt marshes, Spartina alterniflora, Natural ln response ratios (LnRR), the Yellow River Delta

Abstract:

Plant invasion alters the fundamental structure and function of native ecosystems by affecting the biogeochemical pools and fluxes of materials and energy. Native (Suaeda salsa) and invasive (Spartina alterniflora) salt marshes were selected to study the effects of Spartina alterniflora invasion on soil organic carbon (SOC) contents and stocks in the Yellow River Delta. Results showed that the SOC contents (g/kg) and stocks (kg/m2) were significantly increased (P < 0.05) after Spartina alterniflora invasion of seven years, especially for the surface soil layer (0-20 cm). The SOC contents exhibited an even distribution along the soil profiles in native salt marshes, while the SOC contents were gradually decreased with depth after Spartina alterniflora invasion of seven years. The natural ln response ratios (LnRR) were applied to identify the effects of short-term Spartina alterniflora invasion on the SOC stocks. We also found that Spartina alterniflora invasion might cause soil organic carbon losses in a short-term phase (2-4 years in this study) due to the negative LnRR values, especially for 20-60 cm depth. And the SOCD in surface layer (0-20 cm) do not increase linearly with the invasive age. Spearman correlation analysis revealed that silt + clay content was exponentially related with SOC in surface layer (Adjusted R2=0.43, P < 0.001), suggesting that soil texture could play a key role in SOC sequestration of coastal salt marshes.

Key words: plant invasion, soil organic carbon, salt marshes, Spartina alterniflora, Natural ln response ratios (LnRR), the Yellow River Delta