Time filter

Source Type

Setiawan R.Y.,Diponegoro University | Habibi A.,WWF Indonesia
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing | Year: 2011

Seasonal variation of chlorophyll-A (Chl-a) concentration in the Gulf of Tomini (GT) is investigated using SeaWiFS-derived sea surface Chl-a, QuikSCAT-derived ocean surface wind vector and Pathfinder sea surface temperature (SST) measurements. Results show that Chl-A concentration in the GT attained maximum in August (0.59 mg/m 3) and is primarily controlled by monsoon winds. During summer, strong winds pass through the Maluku archipelago and blast out toward the Maluku Sea, and impinge the coastal mountain on the southeastern GT (GT tip). As a result, a strong wind jet observed at the open-ocean of GT and is suspected to be the main driving force for the Chl-A bloom in the region. The center of the bloom is located consistently with the wind stress maximum (0.28 Nm -2) and low SST (27.3°C). The present study describes the seasonal and spatial distributions of the Chl-A bloom in GT and its associated oceanographic features. © 2008 IEEE.

Danielsen F.,Nordisk Fond for Miljo og Udvikling | Adrian T.,Nordisk Fond for Miljo og Udvikling | Brofeldt S.,Copenhagen University | van Noordwijk M.,World Agroforestry Center | And 19 more authors.
Ecology and Society | Year: 2013

Will community monitoring assist in delivering just and equitable REDD+? We assessed whether local communities can effectively estimate carbon stocks in some of the world's most carbon rich forests, using simple field protocols, and we reviewed whether community monitoring exists in current REDD+ pilots. We obtained similar results for forest carbon when measured by communities and professional foresters in 289 vegetation plots in Southeast Asia. Most REDD+ monitoring schemes, however, contain no community involvement. To close the gulf between United Nations Framework Convention on Climate Change texts on involving communities and field implementation realities, we propose greater embedding of community monitoring within national REDD+ pilot schemes, which we argue will lead to a more just REDD+. © 2013 by the author(s).

Wood P.,Green Gecko Ltd | Sheil D.,Norwegian University of Life Sciences | Sheil D.,Center for International Forest Research | Syaf R.,KKI WARSI | Warta Z.,WWF Indonesia
Society and Natural Resources | Year: 2014

We investigated the implementation and sustainability of village conservation agreements and village conservation grants facilitated by an integrated conservation and development project (ICDP) around the Kerinci Seblat National Park, Sumatra, Indonesia, 5 years after the project closed. Forty-three percent of agreement actions (n = 180) and 30% of grant activities (n = 74) were sustained. Informants identified numerous factors influencing success, but statistical tests failed to detect simple explanations. Conservation-livelihood agreements have a greater chance of success when preexisting factors are understood and the purpose of the agreement itself is clearly defined. © 2014 Copyright Taylor & Francis Group, LLC.

Laumonier Y.,CIRAD - Agricultural Research for Development | Laumonier Y.,Center International for Forestry Research | Uryu Y.,WWF U.S. | Stuwe M.,WWF U.S. | And 3 more authors.
Biodiversity and Conservation | Year: 2010

Biogeographical studies are a necessary step in establishing conservation area networks. Determining the ecological factors influencing vegetation is also a basic principle for hierarchical ecological classifications and a necessary prerequisite for ecosystem-based land use planning. Eco-floristic sectors (EFS) have already been identified for the Indonesian island of Sumatra, combining both approaches, dividing it into 38 EFSs representing unique ecosystems in terms of tree flora and environment (Laumonier 1997). The impact of deforestation on individual EFSs has been highly varied and in some cases extreme. We assigned one of five 'extinction risk categories' to each EFS based on the percentage of forest lost between 1985 and 2007. Eighty-five percent of all forest loss (10.2 million ha) occurred in the eastern peneplain, western lowland regions and swamps. In 2007, only 29% of forests were protected by conservation areas, only nine of the 38 EFS had more than 50% of their remaining forest cover protected. 38% of remaining forest was "critically endangered", "endangered" or "vulnerable" EFSs (5 million ha) but only 1 million ha (20%) were protected. Sumatra's existing network of conservation areas does not adequately represent the island's ecosystems. Priorities for a new conservation area network can be formulated for integration into Sumatra's new land use plans at provincial and district level. Decision makers can now use EFSs to locate new conservation areas so they represent and maintain the whole range of the island's diversity. © Springer Science+Business Media B.V. 2010.

Tapilatu R.F.,State University of Papua | Tapilatu R.F.,University of Alabama at Birmingham | Dutton P.H.,National Oceanic and Atmospheric Administration | Tiwari M.,National Oceanic and Atmospheric Administration | And 4 more authors.
Ecosphere | Year: 2013

The leatherbacks nesting at Bird's Head Peninsula, Papua Barat, Indonesia, account for 75% of the total leatherback nesting in the western Pacific and represent the last sizeable nesting population in the entire Pacific. Sporadic nest counts at Jamursba Medi Beach at Bird's Head have indicated a declining trend from the 1980s through 2004, although a relatively high amount of nesting has recently been documented at Wermon Beach, located 30 km east of Jamursba Medi. We used expanded year-round nesting surveys from 2005 to 2011 at these two primary nesting beaches to obtain more robust estimates of the nesting population size and to evaluate long-term nesting trends. We found a 29% decline in nesting at Jamursba Medi and a 52% decline at Wermon from 2005 through 2011. We found that the estimated annual number of nests at Jamursba Medi has declined 78.3% over the past 27 years (5.5% annual rate of decline) from 14,522 in 1984 to 1,596 in 2011. Nesting at Wermon has been monitored since 2002 and has declined 2.8% (11.6% annual rate of decline) from 2,994 nests in 2002 to 1,096 in 2011. Collectively, our findings indicate a continual and significant long term nesting decline of 5.9% per year at these primary western Pacific beaches since 1984. Mark-recapture with PIT tags, initiated in 2003, resulted in the tagging of 1,371 individual nesting females as of March 2012. Observed clutch frequencies ranged from 3-10 per season with a mean of 5.5 ± 1.6 and, based on nest counts, provide an estimate of approximately 489 females nesting in 2011. The persistent and long term decline we report for the Bird's Head leatherback population follows other dramatic declines and extinctions of leatherback populations throughout the Pacific over the last 30 years. These findings highlight the urgent need for continued and enhanced conservation and management efforts to prevent the collapse of what might be the last remaining stronghold for leatherbacks in the Pacific. © 2013 Tapilatu et al.

Sunarto,Virginia Polytechnic Institute and State University | Kelly M.J.,Virginia Polytechnic Institute and State University | Klenzendorf S.,WWF | Vaughan M.R.,Virginia Polytechnic Institute and State University | And 3 more authors.
ORYX | Year: 2013

Information on spatial and temporal variation in abundance is crucial for effective management of wildlife. Yet abundance estimates for the Critically Endangered Sumatran tiger Panthera tigris sumatrae are lacking from Riau, the province historically believed to hold the largest percentage of this subspecies. Recently, this area has had one of the highest global rates of deforestation. Using camera traps we investigated tiger abundance across peatland, flat lowland, and hilly lowland forest types in the province, and over time, in the newly established Tesso Nilo National Park, central Sumatra. We estimated densities using spatially explicit capture-recapture, calculated with DENSITY, and traditional capture-recapture models, calculated with CAPTURE. With spatially explicit capture-recapture the lowest tiger density (0.34 ± SE 0.24 per 100 km2) was estimated in the hilly lowland forest of Rimbang Baling and the highest (0.87 ± SE 0.33 per 100 km2) in the flat lowland forest of the Park. Repeated surveys in the Park documented densities of 0.63 ± SE 0.28 in 2005 to 0.87 ± SE 0.33 per 100 km2 in 2008. Compared to traditional capture-recapture the spatially explicit capture-recapture approach resulted in estimates 50% lower. Estimates of tiger density from this study were lower than most previous estimates in other parts of Sumatra. High levels of human activity in the area appear to limit tigers. The results of this study, which covered areas and habitat types not previously surveyed, are important for overall population estimates across the island, provide insight into the response of carnivores to habitat loss, and are relevant to the interventions needed to save the tiger. Copyright © Fauna & Flora International 2013.

Wulffraat S.,WWF Indonesia | Morrison J.,WWF U.S.
Environmental Conservation | Year: 2013

The ultimate measure of the success or failure of conservation initiatives in an area will be the ecological health of that area and the sustainability of institutions which support that ecological health. Heretofore, no comprehensive data has been presented about the current conservation state of the area known as the Heart of Borneo (HoB), a mostly intact subset of the island of Borneo, which is an international conservation priority. This paper identifies a set of indicators representative of the biodiversity status of the HoB; collecting and analysing data concerning these indicators and combining these data with supplemental conservation information should provide an accurate assessment of the overall conservation state of the HoB. Based on the indicators identified in this study, the general biodiversity status of the HoB is rated as good, or viable, although there are specific elements of concern. Using the threat indicators identified in this study, the overall threat level is medium. Major threats from industrial forest conversion and mining currently exist mainly on the edges of the HoB, but are likely to expand further inland without any intervention simply based on proximity. Though most habitats within (but not outside) the HoB are generally intact, the current protected area system is insufficiently representative of the natural ecosystems of the HoB area and its management effectiveness is as yet unknown. © Foundation for Environmental Conservation 2013.

Agency: Cordis | Branch: FP7 | Program: CP-FP | Phase: ENV.2010.1.1.6-1 | Award Amount: 4.29M | Year: 2011

At COP15 in Copenhagen one outcome was a commitment to develop a mechanism for reducing greenhouse gas emissions from deforestation and forest degradation and enhancing carbon stocks (REDD\). There is, however, only a limited research basis for such a mechanism particularly with regard to the need for understanding and monitoring the impact of REDD\ activities on climate effectiveness, cost efficiency, equity and co-benefits. I-REDD\ will approach these challenges from a truly interdisciplinary perspective. The overall objective will be to obtain an improved understanding of how the implementation of REDD\ mechanisms may 1) reduce emissions of GHG and maintain or enhance existing stocks of carbon in vegetation and soil of various land cover types; 2) impact livelihoods and welfare of local farming communities and differences between communities; 3) impact biodiversity conservation, and 4) provide a realistic framework for monitoring, reporting and verification of REDD\, including the importance of governance and accountability at multiple levels. To complement other research initiatives we propose to work in the uplands of Southeast Asia in the Heart of Borneo, Kalimantan, Indonesia, and in the northern parts of Lao PDR and Vietnam, and Yunnan in Southwest China. Rapid land use transitions from forest and shifting cultivation to other, more intensive land use systems and widespread forest degradation are occurring in these areas, making the potential for REDD\ particularly pronounced. Moreover, REDD\ may considerably impact on local economies, because of the high population densities in the region. The partners in I-REDD\ are leading research institutions in Europe and Southeast Asia, international research organizations, an NGO and an SME. The consortium has a strong emphasis on local dissemination and capacity development in order to ensure that project results influence REDD\ policy development at local, national and global level.

Whittle M.,University of Sheffield | Quegan S.,University of Sheffield | Uryu Y.,World Wildlife Fund | Stuewe M.,World Wildlife Fund | Yulianto K.,WWF Indonesia
Remote Sensing of Environment | Year: 2012

Indonesia has one of the highest rates of deforestation in the world, with a significant impact on the planetary carbon balance and loss of biodiversity. It also covers a vast and often inaccessible area frequently obscured by clouds, making accurate, timely monitoring of its forests difficult. Spaceborne Synthetic Aperture Radar (SAR) images are unhindered by clouds and can provide clear images whenever there is a satellite pass, hence provide a potentially important tool for monitoring forest changes. Over Sumatra, the JAXA Advanced Land Observing Satellite (ALOS) PALSAR L-band radar provided both ScanSAR HH polarisation with repeat images every 46. days, thus providing much more frequent clear imagery than other available rapid deforestation monitoring tools, and approximately annual Fine-Beam Dual (FBD) image pairs with HH and HV polarisations. Temporal analysis of ScanSAR images shows that deforestation in the Sumatran province of Riau can be identified by large values of the temporal standard deviation, but high detection rates are associated with high false alarm rates, particularly in swamp forest. There does not appear to be a reliable signature of the onset of forest disturbance in the ScanSAR time-series. Deforestation can also be detected in annual FBD data by combining increases and decreases in both the HH and HV channels, since the four types of change are complementary; these different polarisation responses indicate a variety of physical processes that may be involved in the radar signature of deforestation. Significant improvements in performance are possible by combining FBD and ScanSAR data, giving 72% detection of deforestation for a false alarm rate (detection of deforestation in undisturbed forest) of 20%. Error analysis based on (a) likely errors in the Landsat data used to provide a reference for deforestation and (b) differences between the times of acquisition of the Landsat data and the FBD data suggest that the true detection rate for the FBD data is underestimated. All the analysis in the paper uses fully automatic methods, but it is likely that false alarms in the ScanSAR data due to periodic flooding could be reduced by human inspection. The performance figures reported here could also be improved if knowledge about the locations of dry and swamp forest was included in the methodology. © 2012 Elsevier Inc..

Jaenicke J.,Ludwig Maximilians University of Munich | Wosten H.,Wageningen University | Budiman A.,WWF Indonesia | Siegert F.,Ludwig Maximilians University of Munich
Mitigation and Adaptation Strategies for Global Change | Year: 2010

Extensive degradation of Indonesian peatlands by deforestation, drainage and recurrent fires causes release of huge amounts of peat soil carbon to the atmosphere. Construction of drainage canals is associated with conversion to other land uses, especially plantations of oil palm and pulpwood trees, and with widespread illegal logging to facilitate timber transport. A lowering of the groundwater level leads to an increase in oxidation and subsidence of peat. Therefore, the groundwater level is the main control on carbon dioxide emissions from peatlands. Restoring the peatland hydrology is the only way to prevent peat oxidation and mitigate CO2 emissions. In this study we present a strategy for improved planning of rewetting measures by dam constructions. The study area is a vast peatland with limited accessibility in Central Kalimantan, Indonesia. Field inventory and remote sensing data are used to generate a detailed 3D model of the peat dome and a hydrological model predicts the rise in groundwater levels once dams have been constructed. Successful rewetting of a 590 km2 large area of drained peat swamp forest could result in mitigated emissions of 1. 4-1. 6 Mt CO2 yearly. This equates to 6% of the carbon dioxide emissions by civil aviation in the European Union in 2006 and can be achieved with relatively small efforts and at low costs. The proposed methodology allows a detailed planning of hydrological restoration of peatlands with interesting impacts on carbon trading for the voluntary carbon market. © The Author(s) 2010.

Loading WWF Indonesia collaborators
Loading WWF Indonesia collaborators