Ciliwung River flows from Bogor district, Bogor city, Depok, to Jakarta. The river faces many problems, especially settlement occupation on its riparian zones. The problem has damaged its natural ecological structures and the agroforestry practices such as mixed gardens, forest gardens, and pekarangan (home garden) in riparian landscape. This research objective is to analyze the structure, function, and dynamics of riparian agroforestry landscape of Ciliwung River in Bogor City. The landscape ecological index analysis approach is used to quantify the structure, function, and dynamics of the landscape. The existing land use in Ciliwung riparian in Bogor City has been dominated by the constructed land, such as settlements and housing. Those land use can be found with an area of 33.78 ha (60.50%) in the upper segment and 34.65 ha (56.54%) in the under segment. Meanwhile, in the middle segment is still dominated by the agroforestry area, such as forest gardens, mixed garden, and pekarangan with an area of 17.59 ha (55.23%). The function of these structures is as the core habitat and movement media of material, energy, animal, and human. The spatial dynamics of the Ciliwung riparian landscape in Bogor City revealed that the more patches of settlements and housing on a landscape, the more patches of pekarangan on the landscape.Keywords: Agroforestry landscape, Ciliwung River, landscape ecology, riparian areas
Ciliwung riparian has facing land use change problem due to settlement occupation, particularly in Bogor which is a municipality with a high population increase in Indonesia. These problem has reduced agroforestry land use of Ciliwung riparian, such as talun (forest garden), kebun campuran (mixed garden), and pekarangan (home garden) which ultimately reduce one of riparian landscape services, that is conserving of plants diversity. Therefore, the purpose of this paper is to show the research result of capacity of conserving plant diversity of agroforestry land use, as a basis for arranging the management of Ciliwung riparian landscape in Bogor Municipality. This study used 14 sample plots of agroforestry land use (4 taluns, 5 kebun campurans, 5 pekarangans) with purposive sampling method, for vegetation analysis of agroforestry land use. Plants diversity was calculated based on value of Shannon-Wiener diversity index (H’) and Margalef richness species index (Dm). The results showed that Ciliwung riparian vegetation in Bogor Municipality was dominated by groundcover plants (0-1 m) and tree plants (5-10 m) with functions as ornamental and conservation plants. The species diversity of agroforestry land use of Ciliwung riparian of Bogor was in medium category (1<H’<3) on average. Kebun campuran has H’ index of 2.07, talun of 1.84, and pekarangan of 1.55. The species richness Dm of talun is 4.32 (high category), while pekarangan and kebun campuran have Dm values in medium category, with values of 3.90 and 3.63 respectively. Overall agroforestry land use of Ciliwung riparian in Bogor Municipality has a good plants diversity (medium-high category), so it can be considered to have fairly balanced ecosystem conditions and medium ecological pressure. This diversity is useful for maintaining the quality and quantity of urban water system in Bogor.
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