Tropical Forest Landscape Fragmentation in Batang Toru Watershed, North Sumatra

  • Samsuri Samsuri Department of Forestry, Faculty of Agriculture, Sumatra Utara University, Medan, Jl. Dr. T. Mansur No. 9, Medan, Indonesia 20155
  • I Nengah Surati Jaya Department of Forest Management, Faculty of Forestry, Bogor Agricultural University, Academic Ring Road, Campus IPB Dramaga, PO Box 168, Bogor, Indonesia 16680
  • Cecep Kusmana Department of Silviculture, Faculty of Forestry, Bogor Agricultural University, Academic Ring Road, Campus IPB Dramaga, PO Box 168, Bogor, Indonesia 16680
  • Kukuh Murtilaksono Department of Soil Science, Faculty of Agriculture and Land Resources, Bogor Agricultural University, Academic Ring Road, Campus IPB Dramaga, Bogor, Indonesia 16680
Keywords: forest connectivity, ecosystem, deforestation, fragstat, fragmentation

Abstract

Timber-based forest management is now shifting to as broader scope including ecosystem-based management. Timber-oriented forest management frequently affects the fragmentation of forest landscape. This paper defines the degree of forest landscape fragmentation in Batang Toru watershed, North Sumatra through indentification of correlation between forest landscape fragmentation and driving factors including biophysical and anthropogenic factors. Identification structure, pattern, and fragmentation of forest landscape were performed using Landsat imageries acquired in 1989, 2001, and 2013. Forest and land cover classes were analyzed using FRAGSTAT 3.3 to generate landscape metrics. Fragmentation of forest landscape was identified using landscape metrics, i.e., area, patch density, number of patch, contiguity and proximity index.  The clumpiness index of landscape metrics describes the pattern of forest landscape, while the patch size proportions expressed structure of forest landscape.  This study found that forest landscapes located in downstream of the watershed show more fragmented than area in the upper stream, while the sub-watershed of Batang Toru Hilir is more clumped  than the others. This study concludes that (1) the forest landscape fragmentation tend to increase since 1989 to 2013; and (2) the degree of forest landscape fragmentation has close correlation with the distance to main road and river.
 

Published
2014-09-10
How to Cite
Samsuri, S., Jaya, I. N. S., Kusmana, C., & Murtilaksono, K. (2014). Tropical Forest Landscape Fragmentation in Batang Toru Watershed, North Sumatra. Jurnal Manajemen Hutan Tropika, 20(2), 77-85. Retrieved from http://journal.ipb.ac.id/index.php/jmht/article/view/8439
Section
Articles