4.7 Article

How soil ion stress and type influence the flooding adaptive strategies of Phragmites australis and Bolboschoenus planiculmis in temperate saline-alkaline wetlands?

Journal

SCIENCE OF THE TOTAL ENVIRONMENT
Volume 771, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.scitotenv.2020.144654

Keywords

Salt marsh; Water level; Functional traits; Common reed; Sedge

Funding

  1. National Key Research and Development Program of China [2016YFC0500408]
  2. Regional innovation and development fund of National Natural Science Foundation of China [U19A2042]
  3. National Natural Science Foundation of China [41771120, 41801353]
  4. National Major Projects on High-Resolution Earth Observation System [21-Y20B01-9001-19/22]
  5. Chongqing Innovation Support Plan Fund for Returned Overseas Chinese Scholars [CX2019023]
  6. Key Laboratory of Resources and Environmental Information System
  7. Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions [GTYR201906]

Ask authors/readers for more resources

This study investigated the adaptive strategies of Phragmites australis and Bolboschoenus planiculmis to flooding combined with salinity-alkalinity. Results showed that the two species adopted different strategies to survive flooding, with high alkaline ion stress playing a significant role in changing their adaptive responses. High greenhouse gas emissions scenarios in Western Songnen Plain may lead to severe degradation of these marshes in the future.
Soil saline-alkaline stress and flooding extremes have been projected to be the main factors influencing the degradation of marsh plants in wetlands worldwide, which would affect their ecological functions (i.e. food source for migrating birds). Plants cope with flooding either by escaping from below water through shoot elongation or by remaining quiescent until water subsides. However, little is known about the adaptive strategies of Phragmites australis and Bolboschoenus planiculmis to flooding combined with salinity-alkalinity, which are the key environmental filters in Western Songnen Plain, China. Accordingly, this study investigated the adaptive strategies of P. australis and B. planiculmis subjected to the interacting effects of flooding and soil ion stress under field and greenhouse conditions. Results showed that the two species adopted different strategies to survive flooding. P. australis exhibited an escape strategy because of leaf and shoot elongation with increasing flooding depth whereas B. planiculmis became quiescent with no or deceased leaf and shoot elongation and biomass accumulation. High soil ion stress changed the flooding adaptive strategy of P. australis to a quiescence strategy, whereas B. planiculmis remained quiescent with increasing flooding depth at each soil ion content. The strategies of the two species were changed by alkaline ion stress but not by saline ion stress, and they exhibited different adaptive responses. High alkaline ion stress induced P. australis to remain quiescent with increasing flooding depth, whereas low alkaline ion stress promoted B. planicumis to escape from below water, probably due to the buffer effect of low alkaline ion contents outside the roots probably. Hence, P. australis and B. planicumis might adopt the quiescence strategy with increasing degree of soil salinization and alkalization under high greenhouse gas emissions scenarios in Western Songnen Plain, which may lead to severe degradation of the two kinds of marshes in the future. (C) 2021 Elsevier B.V. All rights reserved.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available