Predicting Losses of Bird Species from Deforestation in Central Sulawesi

Waltert, Matthias; Langkau, Maike; Maertens, Miet; Härtel, Michael; Erasmi, Stefan; Mühlenberg, Michael

doi:10.1007/978-3-662-08237-9_19

Cited by 19 publications

(22 citation statements)

References 17 publications

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“…The Lore Lindu region, including the Lore Lindu National Park and the five surrounding sub‐districts, covers an area of about 700 thousand ha and is located south of Palu, the provincial capital of South Sulawesi, Indonesia. The region is extremely important from an environmental conservation point of view because of its unique biodiversity, which can only be sustained by preserving forest resources (Waltert et al, 2003). This area was chosen as a focus site for an interdisciplinary research program.…”

Section: The Research Areamentioning

confidence: 99%

Sustainable agricultural intensification in forest frontier areas

Maertens¹,

Zeller

Birner

2006

Agricultural Economics

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The Lore Lindu region in Indonesia-as in many forest frontier areas in Southeast Asia-has experienced rapid deforestation due to agricultural expansion in the uplands, at the forest margins. This has resulted in aggravated problems of erosion and water availability, threatening agricultural productivity growth. At the same time, technical progress is promoting agricultural intensification in the lowlands. In this article, we examine how improved technologies for paddy rice cultivation in the lowlands have affected agricultural expansion and deforestation in the uplands. The question of a "forest-saving" or "forest-clearing" effect related to technical innovation is important from a sustainable development perspective and remains a controversial issue in the literature. We address this question for the Lore Lindu region with an empirical model in which expansion in the lowlands and the uplands is estimated simultaneously. We use data from an extensive village survey conducted in the region, combined with GIS data. To guide the empirical analysis, we develop a theoretical framework based on a Chayanov-type agricultural household model. The model analyzes farmers' land allocation decisions, taking into account the lowland-upland dichotomy in the agricultural sector. The empirical findings, corroborated by the analytically derived results, show how technical progress for lowland production affects land use at the forest margins and how these effects depend on the factor-intensity of the technology. The findings imply specific rural development policies for sustainable agricultural intensification in forest frontier areas. Copyright 2006 International Association of Agricultural Economics.

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Section: The Research Areamentioning

confidence: 99%

Sustainable agricultural intensification in forest frontier areas

Maertens¹,

Zeller

Birner

2006

Agricultural Economics

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“…Brook et al (2003) predicted a loss of up to 42% of the biodiversity in Southeast Asia by 2100 if current deforestation rates continue. For Sulawesi, with its unique composition of bird communities and its high number of endemics, there are just a few studies on the impact of variable land use systems on bird diversity (Siebert 2002, Waltert et al 2004b, Sodhi et al 2005. None of these studies distinguish between different types of plantations with respect to the density, diversity, and structure of the shade tree cover.…”

Section: Introductionmentioning

confidence: 99%

“…None of these studies distinguish between different types of plantations with respect to the density, diversity, and structure of the shade tree cover. Furthermore, all previous studies were conducted in montane or upper submontane areas between 1,000 m and 1,200 m while there is a marked change in species composition from lowland to montane species around 1,200 m elevation (Waltert et al 2004b). Thus, the impact of different structural characteristics of cacao plantations at lower elevations on Sulawesi is still unknown.…”

Section: Introductionmentioning

confidence: 99%

The value of differently managed cacao plantations for forest bird conservation in Sulawesi, Indonesia

et al. 2008

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SummaryIn order to assess the potential value of differently managed cacao plantations for bird conservation on Sulawesi, we surveyed birds in near-primary forest (with limited timber and rattan extraction, and some hunting), cacao plantations with remnant forest trees and plantations lacking forest trees, from February to April 2007. A total of 16 50 x 50 m plots were visited twice and records of 87 species were obtained. Bird species richness and the number of endemics and forest specialists decreased along this gradient of forest conversion, with 20% of the forest specialists, among them 10 endemics, exclusively found in forest. Species composition changed dramatically between habitat types. Sørensen indices showed a similarity of species composition between forests and plantations of 45-60% for forest specialists and 65-71% for all species. The most important environmental variable for the diversity and composition of birds was the number of remnant rainforest trees present in the plantations. Our results suggest that large, undisturbed rainforest are most important for the conservation of forest specialists and endemics but that cacao plantations, if managed to maintain a high and diverse cover of forest trees, can harbour up to 60% of forest specialists and endemics.

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“…This procedure has been proven to be valid since it produced results that were concor- dant with assessments of mammal and bird threat status made by conservationists. The observations were consistent both in Neotropical and south-east Asian tropical rainforest (Brooks and Balmford 1996, Brooks et al 1999a, 1999b, 1999c, Waltert et al 2003. Rearranging the relationship S = cA z one can calculate the number of species most likely to become extinct in a fragment (or nested subset) of a given size by dividing S surviving = cA z surviving by S original = cA z original .…”

Section: Background Of the Problemsupporting

confidence: 56%

“…Table 2 reflects the actual causes for deforestation 8 Gálvez (2000) 3 Predicting the future of the region Spatial diversity (species-area relationship) patterns have important implications for conservation of biodiversity, and understanding these patterns contributes to our knowledge of community structure. Species and area are related with S = cA z , where S number of species, A area, z and c constants (e.g., MacArthur and Wilson 1967, Rosenzweig 1995, Krebs 1999, Waltert et al 2003.…”

Section: Background Of the Problemmentioning

confidence: 99%

Direct payments for conservation — the importance of environmental measures in farming systems for bird populations in a fragmented landscape. A case study in Guatemala

Costa

Renner

Valuation and Conservation of Biodiversity

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The name Guatemala is derived from the Nahuatl guauhtemallan, which means ›land of trees‹. Guatemala is home to a unique mix of plants and animals. The country's biological diversity is among the highest in Central America and it ranks among the 25 most plant-rich countries in the world. Increasing conservation efforts in this region are crucial to preserving Guatemala's wealth of ecosystems. As a case study, the region of the Macizo de Cobán has been chosen. The area contains one of biodiversity's hotspots, consisting of large areas of cloud forest. Degradation and loss of forest cover is caused mainly by slash-and-burn increased agricultural expansion to grow subsistence crops (e.g., corn and beans), forest clearing for cash crops (e.g., cardamom and coffee), extraction of firewood (the only domestic fuel of rural inhabitants), local demand for construction, illegal logging increasing demand for commercial forest products (particularly of the reserve's primary and old-growth forest) and finally, the clearing of forest for cattle grazing. Slash-and-burn is becoming a pushing method that is destroying the most intricate part of the tropical nutrient cycle and continues to degrade and destroy this biologically rich region. Due to the socio-economic conditions and the pressure on resources in the Macizo de Cobán, it is almost impossible to conserve forest as a pristine area. Therefore, environmental measures must be implemented to mitigate the loss of biologically diverse forests.

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Predicting Losses of Bird Species from Deforestation in Central Sulawesi

Cited by 19 publications

References 17 publications

Sustainable agricultural intensification in forest frontier areas

Sustainable agricultural intensification in forest frontier areas

The value of differently managed cacao plantations for forest bird conservation in Sulawesi, Indonesia

Direct payments for conservation — the importance of environmental measures in farming systems for bird populations in a fragmented landscape. A case study in Guatemala

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