Feedback

Gembloux Agro-Bio Tech (GxABT)
Gembloux Agro-Bio Tech (GxABT)
MASTER THESIS
VIEW 208 | DOWNLOAD 588

Ecological restoration of Wairio Wetland, New Zealand : Effect of flooding on woody vegetation, carbon sequestration and recommendations for future plantings

Download
Fanal, Aurore ULiège
Promotor(s) : Claessens, Hugues ULiège ; Hartley, Stephen
Date of defense : 25-Aug-2017 • Permalink : http://hdl.handle.net/2268.2/3038
Details
Title : Ecological restoration of Wairio Wetland, New Zealand : Effect of flooding on woody vegetation, carbon sequestration and recommendations for future plantings
Translated title : [fr] Restauration écologique du "Wairio Wetland", Nouvelle-Zélande: Impact d'une inondation sur la végétation ligneuse, séquestration carbone et recommandations pour les futures plantations.
Author : Fanal, Aurore ULiège
Date of defense  : 25-Aug-2017
Advisor(s) : Claessens, Hugues ULiège
Hartley, Stephen 
Committee's member(s) : Lejeune, Philippe ULiège
Hebert, Jacques ULiège
Mahy, Grégory ULiège
Language : English
Number of pages : 84
Keywords : [fr] Wetland
[fr] Restoration
[fr] Planting treatments
[fr] Planting methods
[fr] Freshwater wetland
[fr] Flooding
[fr] Carbon sequestration
[fr] restoration plantings
[fr] revegetation
[fr] planting treatments
[fr] D. dacrydioides
[fr] Kahikatea
[fr] Totara
[fr] Zone humide
[fr] restauration
[fr] séquestration carbone
[fr] inondation
[fr] immersion
[fr] traitements
[fr] plantation
[fr] planting map
[fr] plantation plan
Discipline(s) : Life sciences > Environmental sciences & ecology
Commentary : Thesis realized as part of the Wairarapa Moana Restoration Project.
Funders : Fonds d'aide à la mobilité de la Fédération Wallonie-Bruxelles (FAME), Université de Liège (Fonds de Mobilité).
Research unit : School of Biological Sciences, Victoria University of Wellington
Name of the research project : Wairio Wetlan Restoration Project
Target public : Researchers
Professionals of domain
Student
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en bioingénieur : gestion des forêts et des espaces naturels, à finalité spécialisée
Faculty: Master thesis of the Gembloux Agro-Bio Tech (GxABT)

Abstract

[en] This thesis analyses the success of plantings in the Wairio Wetland, a 132-ha area of the Wairarapa Moana wetland complex, located in the lower North Island of New Zealand. In 2011, as part of a restoration project, 2,368 native trees of eight different species were planted in a fenced area using various planting methods. These include: the use of weedmats, topsoil removal, herbicide spraying, the planting of nurse trees, and altered spacing distances. The study aims to (1) analyse the effect of treatments on growth and survival after six years, as well as the effect of elevation (related to water level), (2) develop informed planting strategies for future plantings, and (3) estimate the amount of carbon sequestered by trees.
Six years after planting, results show that all species exhibited poor survival rates. An extreme flooding event in 2016 was responsible for a drop in the survival rates of almost all species. The tolerance to low elevations decreased at the same time. As such, elevation was an important predictor of survival. Topsoil scraping and wide spacing between trees positively influenced the survival of some species. However, most trees grew less in scraped soils. The presence of nurse trees and altered spacing distances did not influence the growth of most species. It is estimated that a total of 1.4 tonne of carbon has been sequestered by planted trees. Survival maps were created and used to inform planting plans in adjacent areas. If utilised, 15.7 tonnes of carbon could be sequestered after six years, or 233 tonnes over the entire Wairio restoration block.
This study highlights the need for an efficient weed control method and emphasises the importance of understanding local hydrology before planting. Also, revising the priority services to restore might be necessary to define the best planting zones. Some objectives might be antagonistic, such as the filtration of water run-off from pastoral lands and the restoration of a Dacrycarpus dacrydioides swamp forest providing shelter to native flora and fauna.


File(s)

Document(s)

File
Access TFE_Aurore_Fanal.pdf
Description: -
Size: 5.13 MB
Format: Adobe PDF
File
Access Erratum_TFE_Aurore_Fanal.pdf
Description: -
Size: 668.88 kB
Format: Adobe PDF

Author

  • Fanal, Aurore ULiège Université de Liège > Master bioingé. gest. forêts & esp. nat., à fin.

Promotor(s)

Committee's member(s)

  • Lejeune, Philippe ULiège Université de Liège - ULg > Ingénierie des biosystèmes (Biose) > Gestion des ressources forestières et des milieux naturels
    ORBi View his publications on ORBi
  • Hebert, Jacques ULiège Université de Liège - ULg > Ingénierie des biosystèmes (Biose) > Gestion des ressources forestières et des milieux naturels
    ORBi View his publications on ORBi
  • Mahy, Grégory ULiège Université de Liège - ULg > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
    ORBi View his publications on ORBi
  • Total number of views 208
  • Total number of downloads 588










All documents available on MatheO are protected by copyright and subject to the usual rules for fair use.
The University of Liège does not guarantee the scientific quality of these students' works or the accuracy of all the information they contain.