jonathan davies: priorities for research in the wetland forests of brunei
TRANSCRIPT
PRIORITIES FOR RESEARCH IN THE
WETLAND FORESTS OF BRUNEI
THE INTERNATIONAL CONFERENCE ON WETLAND FORESTS
“FORESTS FOR SUSTAINABLE LIVING”
22-23 MARCH 2012, THE RIZQUN INTERNATIONAL HOTEL
BANDAR SERI BEGAWAN, BRUNEI DARUSSALAM
Paper presented at:
STRUCTURE OF PRESENTATION
BRIEF OVERVIEW OF EACH WETLAND FOREST TYPE
RESEARCH PRIORITIES
DETAILS ON RESEARCH PRIORITIES
GENERAL RECOMMENDATIONS ON RESEARCH
ACTIVITIES
FOUR TYPES OF WETLAND FOREST
MANGROVEClassified into 5 types
FRESHWATER SWAMP FORESTUnclassified (only levee and backswamp)
PEAT SWAMP FOREST6 major types distinguished
KERAPAH(Develops within waterlogged kerangas areas)
OVERVIEW OF WETLAND FORESTS IN BRUNEI
Based on Anderson & Marsden (1984)
WETLAND FOREST TYPE
AREA (ha) PERCENTAGE OF AREA OF BRUNEI
MANGROVE 19,217 3.55
MANGROVE/PEAT SWAMP FOREST TRANSITION
3,343 0.58
PEAT SWAMP FOREST
95,410 16.55
FRESHWATER SWAMP FOREST
12,761 2.22
TOTAL 130,731 22.70
SUMMARY OF AREA OF WETLAND FORESTS IN BRUNEI
Based mainly on Anderson & Marsden (1984) data
MANGROVES: MAINLY TEMBURONG DISTRICT:
ALL SUB-TYPES PLUS PSF:MANGROVE TRANSITION
SELIRONG ISLAND 1.1: RHIZOPHORA
OTHER MANGROVE SUBTYPES
NYIREH BUNGA
(Xylocarpus granatum)
NYPA / DUNGUN
Nypa fruticans /
Heritiera globosa(Bornean endemic)
Nypa
Oncosperma
TRANSITIONMixed peat swamp forest
COAST INLAND
MANGROVE : PEAT SWAMP FOREST TRANSITION
SUGGESTED RESEARCH PRIORITIES FOR MANGROVE
� ECONOMIC VALUATION: esp IMPORTANCE AS FISH
AND SHELLFISH BREEDING, FEEDING & NURSERY AREAS (BRUNEI
BAY incl. SABAH & SARAWAK?)
� UPDATED STATUS: INTACT , DISTURBED & CLEARED
� REHABILITATION STRATEGIES:
LOGGED AREAS OF RHIZOPHORA: colonisation by fern Acrosthicum inhibits good regeneration of Rhizophora
RE-VEGETATION ALONG CLEARED TIDAL CREEKS & SURVEY OF ACID SO4 SOIL DISTRIBUTION(PROBLEM WITH ACID SULPHATE SOILS)
Sg DAMUAN (1998): The pH of the soil mean of 2.54
� DISEASES / INFESTATIONS
DEFOLIATION OF RHIZOPHORA
BRUNEI BAY MARCH 2011
DISEASES & INFESTATIONS
DISTURBANCE OF ACID SULPHATE SOILS:
OCHRE DEPOSITS IN CLEARED AREA OF MANGROVE ALONG Sg DAMUAN,
1998 (CANALISATION)
LARGE AREAS OF Rhizophora CLEARED RECENTLY: HOW TO REHABILITATE??
ACID SULPHATE SOIL LOCATIONS UNDERLYING MANGROVE AND PEAT
GREALISH et al. (2008)
DISTURBED ACID SULPHATE SOILS:REHABILITATION / REVEGETATION POSSIBILITIES:
Cerbera odollam
BRUNEI BAY-WIDE STUDY ON MANGROVE SUPPORT TO COASTAL
FISHERIES
RIVERINE VEGETATIONZONATION:
GLUTA VELUTINA/
REHABILITATION
OF CLEARED
AREAS:
SUITABLE SPECIES?
Barringtonia conoidea
Gluta velutina
MIXED FRESHWATER
TIDAL ZONE:
Barringtoniaracemosa
Horsfieldia
iriya
ALL 4 SPP PROMISINGCANDIDATES
RESEARCH IN PROPAGATION OF
SUITABLE SPECIES
FRESHWATER SWAMP FOREST
MANY DIFFERENT SUB-TYPES
Related to depth and frequency of flooding, nutrient status of incoming water & type of soil
FSF dominated by Vatica umbonata,dry period
FSF ALONG MAJOR
RIVERS
FSF dominated
by Pternandra
corulescens & Syzygium
FSF DOMINATED BY RAMIN, Gonystylus bancanus, TASEK MERIMBUN
NUTRIENT-POOR FSF, BUKIT SAWAT
SUGGESTED RESEARCH PRIORITIES FOR FRESHWATER
SWAMP FOREST
� VEGETATION TYPES IN RELATION TO EDAPHIC AND
HYDROLOGICAL FACTORS
(Water quality and depth and frequency of flooding, soil type)
� IMPORTANCE OF FSF AND TRIBUTARIES FOR SPAWNING,
FEEDING AND NURSERY AREAS FOR FISHES:
e.g. IKAN TAPAH (Wallago leerii)
� IMPORTANCE OF FRESHWATER FISHES FOR LOCAL PEOPLE
� REHABILITATION POSSIBILITIES
WALLAGO LEERII:
SOCIO-ECONOMIC IMPORTANCE
THOUGHT TO SPAWN IN TRIBUTARIES
OF MAJOR RIVERS
FISHERIES & FRESHWATER
SWAMP FOREST
CREEK, BELAIT RIVER – LUAGAN LALAK
MIGRATION OF FISHES AND USE OF FSF RESOURCES
IMPORTANCE OF FISHERIES TO LOCAL PEOPLE
REHABILITATION POSSIBILITIESIDENTIFICATION & PROPAGATION OF SUITABLE SPECIES
Calophyllum macrocarpum
Vatica umbonata
Teijsmanniodendron pteropodum
KERAPAH
AREA AND LOCATIONS NOT MAPPED, VEGETATION COMMUNITIES
DISTURBED KERAPAH ON SAND RIDGE, LUMUT PIPELINE ROAD
MOST PEATLANDS FOUND IN LOWER BELAIT DISTRICT: SOME
SHARED BETWEEN SARAWAK AND BRUNEI
PEAT SWAMP FOREST
MOSTLY OCCUR AS PEAT DOMES
LOWER BELAITDISTRICT
Anderson and Marsden (1984)
PEAT DOMES
VERY FEW STUDIES ON PEAT
DOMES IN BRUNEI
DEPTH STUDIES
Profile from
Baram basin
Profile from shared peat
dome between Baram &Belait rivers
Sequence of vegetation with peat depth in northwest Borneo
(Sarawak & Brunei)
Vegetation Communities on Peat
Modified from Anderson (1961),
shown in Whitmore (1984)
PHASIC COMMUNTY 3: THE DIPTEROCARP SHOREA ALBIDA (alan bunga) FOREST FORMING PURE STANDS, BELAIT DISTRICT, BRUNEI
PHASIC COMMUNITY 6
TOP OF HIGHLY DEVELOPED
PEAT DOMES
(ONLY ULU MENDARAM IN
BRUNEI)
FSF & PSF OFTEN OCCUR AS MOSAICS
WITH OTHER FOREST TYPES
SUGGESTED RESEARCH PRIORITIES FOR PEAT SWAMP FOREST IN BRUNEI
� Carbon dynamics of intact and degraded
areas (SMART-MIT)
Hydrological dynamics Peatlands within whole
catchments: effect of upstream activities on
downstream peat areas
� Economic valuation – values taken into
account in land use planning
� Whole dome studies: profiles (depth) &
factors controlling vegetation
� Rehabilitation strategies, including research
on propagation of potential reforestation
species (UBD, BAP) - Shorea albida
� Paleaobotanical studies
� Biodiversity: fish fauna
� Resource use by people
� Effects of projected climate change incl. sea
level rise
� Permanent plots - intact and disturbed
areas: Subsidence, succession…
� Sustainable forestry and agriculture on
rehabilitated peatlands: low impact use:
multi-cropping?
LOWER BELAIT:TWO COMPLETELY UNDISTURBED
WHOLE DOME STUDIES
UPPER BELAIT VALLEY: INTACT PEAT BLOCKS IN A MOSAIC WITH
OTHER UNDISTURBED FOREST TYPES:
LINKAGES BETWEEN ECOSYSTEMS & MOVEMENT OF FAUNA
(Sg INGEI FAUNAL SURVEY PROJECT)
WHAT FACTORS CONTROL TYPE OF VEGETATION ON A DOME?
Sarawak data from Tie (pers comm)
PALAEOBOTANIC STUDIES:WHAT IS THE VEGETATION SEQUENCE FOR PEAT OVER SAND?
ANDERSON & MULLER (1975):
BARAM BASIN STUDY OF PEATOVER MANGROVE CLAY
RESEARCH ON SHOREA ALBIDA (ALAN)
“EXTREME” MAST-FRUITING SPECIES
Last mast fruiting not knownTHREE TYPES OF COMMUNITIES Ided:
ALAN BATU
ALAN BUNGA
PADANG ALAN
WORK BY: Sukmaria & Salim (nd)
� DBH, tree height and crown width
were significantly different between all
Alan populations
� The Alan populations appear to be
genetically similar
� Morphological variations did not seem
to be related to biochemical or genetic
variations
BUT: “LOCALISED GREGARIOUS FRUITING”
POSSIBLE TO
RESTORE
LOGGED OVER
ALAN BUNGA
AREAS?
WHAT FACTORS
CONTROL
FLOWERING?
WHY LOCALISED
FLOWERING?
MARCH 2010
POTENTIAL REFORESTATION SPECIES
SHOREA ALBIDA
SHOREA PACHYPHYLLA
VATICA UMBONATA
DRYOBALANOPS RAPPA
DYERA POLYPHYLLA
OTHERS:
COMBRETOCARPUS ROTANDATUS
JACKIA ORNATA
AGLAIA RUBIGINOSA
LITSEA spp
SUSTAINABLE FORESTRY & AGRICULTURE ON REHABILITATED
PEATLANDS
Jelutong plantations?
(Central Kalimantan)
Forestry: Shorea spp., Dryobalanops rappa
Crops? Sago? Multi-cropping?:
Closed canopy desirable?
Jauliainen et al. (2012): CO2 emissions
Inevitable in any agricultural development
on peat
BIODIVERSITY
SURVEYS:
BLACKWATER FISH
DIVERSITY SURVEYS
Paedocypris
World’s smallest vertebrate
(Kottelat et al. 2005)
Fishes from blackwater sites,Peninsula Malaysia
HEART OF BORNEO INITIATIVE
95% OF WETLAND FORESTS WITHIN HoB AREA
TWO OF HoB BRUNEI OBJECTIVES:
Survey of endangered cats in Brunei
Survey of amphibians in Brunei
Survey of insect biodiversity in Brunei
Large mammal survey in the Inter-riverine Zone
Survey of fish and aquatic invertebrates in Brunei
• To re-establish forest connectivity and the greening of
degraded areas, through forest rehabilitation, afforestation,
reforestation other rehabilitative means.
INTERVENTIONS: BIODIVERSITY SURVEYS
• To conserve representative forest and freshwater habitats, as
well as the full range of biological diversity therein; for the
enjoyment and benefit of future generations of Bruneians.
IMPORTANT ROLE OF MONITORING:
PHNS DATA TO BIRDLIFE: IMPORTANT
BIRD AREAS (IBAs)
�FOR PHENOLOGY OF POTENTIAL REFORESTATION SPP.
(COLLECTION OF SEEDS & FRUITS): USE OF PERMANENT PLOTS?
�MONITORING HEALTH OF ECOSYSTEMS
�RECORDING OCCURRENCE OF SPECIES
e.g. PENAGA NATURAL HISTORY SOCIETY
BRUNEI NATURE SOCIETY
MONITORING HEALTH OF ECOSYSTEMS IDENTIFIES ISSUES WHICHMAY NEED RESEARCH INPUT
MONITORING: PERMANENT PLOTS
PHENOLOGY OF POTENTIAL
REFORESTATION SPECIES: WHEN
TO COLLECT SEEDS & FRUITS
SET UP IN DIFFERENT VEGETATION COMMUNITIES
IN WETLAND FORESTS; e.g. the 6 phasic
communties on peat domes
PEAT: DISTURBED AREAS:
SUBSIDENCE MEASURING POLES,
SUCCESSION
SUMMARY
MAIN TRENDS IN SUGGESTED PRIORITIES:
BASE LINE DATA ON FUNCTIONING OF UNDISTURBED ECOSYSTEMS:
(INTACT NATURE & ACCESSIBILITY)
CARBON DYNAMICS
Including mangroves and FSF as well as PSF
BIODIVERSITY VALUES
INTER-LINKAGES OF ECOSYSTEMS AT LOCAL & CATCHMENT LEVEL
ECONOMIC VALUATION & RESOURCE USE BY LOCAL PEOPLE
RESTORATION & REHABILITATION OF WETLAND FORESTS
VEGETATIONAL HISTORY
GENERAL RECOMMENDATIONS
� DEVELOPMENT OF A NATIONAL WETLAND INVENTORY
� DEVELOPMENT OF A RESEARCH PLAN FOR WETLAND FORESTS
(In collaboration with regional and international institutions: e.g. FRIM,
universities)
� REGIONAL AND INTERNATIONAL COLLABORATION IN RESEARCH:
HEART OF BORNEO INITIATIVE; ASEAN (APFP); University to University
Partnerships, British High Commission….
� REGULAR CONSULTATION WITH RELEVANT GOVERNMENT IMPLEMENTING
AND PLANNING AGENCIES DURING LIFE OF PROJECTS
� INFORMATION PRESENTED IN SUCH A WAY AS TO EASILY FEED INTO
GOVERNMENT PLANNING PROCESSES AND TO FULFIL INTERNATIONAL
OBLIGATIONS
CBD: NATIONAL BIODIVERSITY STRATEGYUNFCC: CARBON ACCOUNTING: EMISSION REDUCTION TARGETS etcLAND USE MASTER PLANS & NATIONAL PROTECTED AREAS SYSTEM
THANK YOU FOR YOUR ATTENTION
TERIMA KASIH