Village based data approach for Orang utan habitat

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VILLAGE BASED DATA APPROACH FOR ORANG UTAN

HABITAT SUITABILITY MAPPING IN BORNEO

L.B.Prasetyo, K.Mengersen, E. Meijaard, D.Buchori, Lennie, Yoki, B. Okarda

BOGOR AGRICULTURAL UNIVERSITY & TNC

ATBC Meeting Bali-Indonesia 2010

Introduction

• In Borneo : 300 distinct Orang Utan (OU) population, distributes in 130,919 km2₍₂₀₀₄₎

• Needs huge effort to map its habitat and population condition (large amount of money & time needed)

• In 2008 : new approach based on structured-interview based approach to villagers (687 villages, 10 villagers each, 32 questions and 34 optional sub-questions)

–Relative Abundance of OU

–Conflict of OU and Community (rate killing)

–Socio, culture/tribes & economic background of community –Understanding the community knowledge of OU regarding its

status/regulation –etc

METHOD

• Logistic Regression Model

–

Where : P = Absence/Presence of OU

ß

ji = Independent Variables

•

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2

Abbreviation Variable Unit

alt _{Altitude (RSTM)} _{Meter Above Sea}

Level

slo _{Slope (RSTM)} _Percent riv _{Distance From River (River network)} _Kilometer road _{Road Density (Road network : Landsat)} _Km/Km2 popdens _{Population Density (PODES)} _People/Km2 agr _{Agricultural family (PODES)} _{Number of family} non_ agr _{Non Agricultural family (PODES)} _{Number of family} ks _{Pra KS and KS 1 family (PODES)} _{Number of family} labor _{Agricultural Labor (PODES)} _{Number of Labour} jamkes _{JAMKES recipient (PODES)} _{Number of recipient} Note

INDEPENDENT VARIABEL

(Phisical & Socio-economics)

Number Village : 1,725 Number sample : 687 villages

Distribution of OU (PHVA 2004)

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METHOD : Sample of villages

1. Total area : 5522 Grid each 25km2_{(West Borneo, East}

Borneo, Central Borneo)

2. Sample area is forested area (based on data in 2006) which overlapping with village survey location

3. Sampling area : 1104 Grid – Hawth Tools generated

random sampling

4. Presence area is sampling area with presence data from survey (Relative Abundance/RA = 1, 2,3, or 4)

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4

slo .032.014 5.150 1 .023 1.033 1.004 1.062 riv .086.026 10.858 1 .001 1.090 1.035 1.147

road -.283.149 3.600 1 .058 .753 .562 1.009

popdens -.002 .001 1.553 1 .213 .998 .995 1.001

Nagelkerke R Square = 0.054

0 1 %

presence 0 61 939 6.1

1 13 987 98.7

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FUTURE THREAT & POTENTIAL SUITABLE HABITAT

ALOS PALSAR (2008) RGB : HH,HV,Normalized

Courtesy : JAXA & JICA Band 1 : HH Band 2 : HV Band 3 : HH-HV/HH+HV (Normalized = Decomposed band)

IMPORTANT SUITABLE HABITAT

Gn. Palung National Park

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IMPORTANT SUITABLE HABITAT

TN. Sebangau

IMPORTANT SUITABLE HABITAT

TN. Kutai

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THREAT OF POTENTIAL SUITABLE HABITAT (OIL PALM)

Village based data approach for Orang utan habitat