Effects of Inundation, Nutrient Availability and Plant Species Diversity on Fine Root Mass and Morphology Across a Saltmarsh Flooding Gradient

Frontiers in Plant Science
Regine RedelsteinChristoph Leuschner

Abstract

Saltmarsh plants are exposed to multiple stresses including tidal inundation, salinity, wave action and sediment anoxia, which require specific root system adaptations to secure sufficient resource capture and firm anchorage in a temporary toxic environment. It is well known that many saltmarsh species develop large below-ground biomass (roots and rhizomes) but relations between fine roots, in particular, and the abiotic conditions in salt marshes are widely unknown. We studied fine root mass (<2 mm in diameter), fine root depth distribution and fine root morphology in three typical communities (Spartina anglica-dominated pioneer zone,Atriplex portulacoides-dominated lower marsh,Elytrigia atherica-dominated upper marsh) across elevational gradients in two tidal salt marshes of the German North Sea coast [a mostly sandy marsh on a barrier island (Spiekeroog), and a silty-clayey marsh on the mainland coast (Westerhever)]. Fine root mass in the 0-40 cm profile ranged between 750 and 2,500 g m-2in all plots with maxima at both sites in the lower marsh with intermediate inundation frequency and highest plant species richness indicating an effect of biodiversity on fine root mass. Fine root mass and, even more, total fine root surfac...Continue Reading

References

Jul 8, 1997·Proceedings of the National Academy of Sciences of the United States of America·R B JacksonE D Schulze
Oct 27, 2006·Nature·Bradley J CardinaleClaire Jouseau
Aug 9, 2007·Annals of Botany·Susana Redondo-GómezM Enrique Figueroa
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Apr 5, 2017·Scientific Reports·Nico EisenhauerLiesje Mommer

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Citations

Jul 16, 2019·Annals of Botany·Ryan S EdgeHannah L Mossman
Jul 28, 2018·Oecologia·Regine RedelsteinChristoph Leuschner
Oct 16, 2020·Nature Communications·Peter MuellerJ Patrick Megonigal
Aug 17, 2021·Frontiers in Plant Science·Raquel CarmonaF Xavier Niell

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Methods Mentioned

BETA
PCA
environmental stress

Software Mentioned

R Development Core Team
WinRhizo
car
CANOCO
pgirmess
kruskalmc
MASS
Earthstar Geographics
GeoEye
R

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