IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

How are anatomical and hydraulic features of the mangroves Avicennia marina and Rhizophora mucronata influenced by siltation?
De Deurwaerder, H.; Okello, J.A.; Koedam, N.; Schmitz, N.; Steppe, K. (2016). How are anatomical and hydraulic features of the mangroves Avicennia marina and Rhizophora mucronata influenced by siltation? Trees-Struct. Funct. 30(1): 35-45. hdl.handle.net/10.1007/s00468-016-1357-x
In: Trees - Structure and Function. Springer: Berlin. ISSN 0931-1890, more
Peer reviewed article  

Available in Authors 
    VLIZ: Open Repository 286438 [ OMA ]

Keyword
    Marine
Author keywords
    Hydraulic conductivity Wood anatomy Stomata Leaf area Phloem band/growth layer ratio

Authors  Top 
  • De Deurwaerder, H., more
  • Okello, J.A., more
  • Koedam, N., more

Abstract
    Elevated sediment addition, or siltation, within mangrove ecosystems is considered as being negative for trees and saplings, resulting in stress and higher mortality rates. However, little is known about how siltation influences the hydraulic functioning of mangrove trees. Comparing two mangrove tree species (Avicennia marina Vierh. Forsk. and Rhizophora mucronata Lam.) from low and high-siltation plots led to the detection of anatomical and morphological differences and tendencies. Adaptations to high siltation were found to be either mutual among both species, e.g., significant smaller single leaf area (p A.marina = 0.058, F1.38 = 3.8; p R.mucronata = 0.005, F1.38 = 8.7; n = 20 × 20) and a tendency towards smaller stomatal areas (p A.marina = 0.131, F1.8 = 2.8; p R.mucronata = 0.185, F1.8 = 2.1, n = 5 × 60), or species-specific trends for A. marina, such as higher phloem band/growth layer ratios (p = 0.101, F1.8 = 3.4, n = 5 × 3) and stomatal density (p = 0.052, F1.8 = 5.2, n = 5 × 4). All adaptations seemingly contributed to a comparable hydraulic conductivity independent of the degree of siltation. These findings indicate that silted trees level off fluctuations in their hydraulic performance as a survival mechanism to cope with this less favourable environment. Most of the trees’ structural adaptations to cope with siltation are similar to known drought stress-imposed adaptations.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors