Repository logo
 

Tree species that ‘live slow, die older’ enhance tropical peat swamp restoration: Evidence from a systematic review

Published version
Peer-reviewed

Change log

Abstract

jats:titleAbstract</jats:title>jats:p jats:list

jats:list-itemjats:pDegraded tropical peatlands lack tree cover and are often subject to seasonal flooding and repeated burning. These harsh environments for tree seedlings to survive and grow are therefore challenging to revegetate. Knowledge on species performance from previous plantings represents an important evidence base to help guide future tropical peat swamp forest (TPSF) restoration efforts.</jats:p></jats:list-item>

jats:list-itemjats:pWe conducted a systematic review of the survival and growth of tree species planted in degraded peatlands across Southeast Asia to examine (1) species differences, (2) the impact of seedling and site treatments on survival and growth and (3) the potential use of plant functional traits to predict seedling survival and growth rates.</jats:p></jats:list-item>

jats:list-itemjats:pPlanted seedling monitoring data were compiled through a systematic review of journal articles, conference proceedings, reports, theses and unpublished datasets. In total, 94 study‐sites were included, spanning three decades from 1988 to 2019, and including 141 indigenous peatland tree and palm species. Accounting for variable planting numbers and monitoring durations, we analysed three measures of survival and growth: (1) final survival weighted by the number of seedlings planted, (2) half‐life, that is, duration until 50% mortality and (3) relative growth rates (RGR) corrected for initial planting height of seedlings.</jats:p></jats:list-item>

jats:list-itemjats:pAverage final survival was 62% and half‐life was 33 months across all species, sites and treatments. Species differed significantly in survival and half‐life. Seedling and site treatments had small effects with the strongest being higher survival of mycorrhizal fungi inoculated seedlings; lower survival, half‐life and RGR when shading seedlings; and lower RGR and higher survival when fertilising seedlings. Leaf nutrient and wood density traits predicted TPSF species survival, but not half‐life and RGR. RGR and half‐life were negatively correlated, meaning that slower growing species survived for longer.</jats:p></jats:list-item>

jats:list-itemjats:pjats:italicSynthesis and applications</jats:italic>. To advance tropical peat swamp reforestation requires expanding the number and replication of species planted and testing treatments by adopting control vs. treatment experimental designs. Species selection should involve slower growing species (e.g. jats:italicLophopetalum rigidum, Alstonia spatulata, Madhuca motleyana</jats:italic>) that survive for longer and explore screening species based on functional traits associated with nutrient acquisition, flooding tolerance and recovery from fire.</jats:p></jats:list-item> </jats:list> </jats:p>

Description

Funder: Arcus Foundation; Id: http://dx.doi.org/10.13039/100016681


Funder: Darwin Initiative


Funder: European Association of Zoos and Aquaria; Id: http://dx.doi.org/10.13039/501100009167


Funder: European Outdoor Conservation Association; Id: http://dx.doi.org/10.13039/501100013711


Funder: Fundacion Bioparc


Funder: Ocean Parks Conservation Foundation Hong Kong


Funder: Orangutan Land Trust


Funder: Save the Orangutan


Funder: Taronga Zoo


Funder: The Orangutan Project


Funder: Ministry of Environment & Forestry


Funder: PT Rimba Makmur Utama

Keywords

drainage, fires, kerapah, mounding, native species, oceanic Nino index, palms, revegetation, tropical peatland, weeding

Journal Title

Journal of Applied Ecology

Conference Name

Journal ISSN

0021-8901
1365-2664

Volume Title

Publisher

Wiley
Sponsorship
JSPS KAKENHI (JP20K12266)
National Research Foundation Singapore (NRF2019‐ITC001‐001)
NERC‐GCRF (NE/T010401/1)
Research Institute for Humanity and Nature (14200117)
Singapore Ministry of Education Research Fund (MOE2018‐T2‐2‐156)
The National Conservation Trust Fund for Natural Resources, The National Conservation Trust Fund for Natural Resources, Government of Malaysia (NRE(S) 600‐2/1/48/2JId.2 (9))