Landscape dynamics of Amazonian deforestation between 1984 and 2002 in central Rondônia, Brazil: assessment and future scenarios

Ferraz, Sílvio; Vettorazzi, Carlos Alberto; Theobald, David M.; Ballester, Maria Victória Ramos

doi:10.1016/j.foreco.2004.07.073

Cited by 71 publications

(35 citation statements)

References 48 publications

(53 reference statements)

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“…Deforestation (Figure 8) clustered along roads, consistent with other measurements in Amazon rainforest , Walker et al 2004, de Barros Ferraz et al 2005. It also clustered along rivers, contrary to measurements in Southeast Peru (Alvarez and Naughton-Treves 2003).…”

Section: Resultssupporting

confidence: 83%

Forest Restoration Carbon Analysis of Baseline Carbon Emissions and Removal in Tropical Rainforest at La Selva Central, Peru

González¹,

Kroll²,

Vargas³

2006

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Conversion of tropical forest to agricultural land and pasture has reduced forest extent and the provision of ecosystem services, including watershed protection, biodiversity conservation, and carbon sequestration. Forest conservation and reforestation can restore those ecosystem services. We have assessed forest species patterns, quantified deforestation and reforestation rates, and projected future baseline carbon emissions and removal in Amazon tropical rainforest at La Selva Central, Peru. The research area is a 4800 km 2 buffer zone around the Parque Nacional Yanachaga-Chemillén, Bosque de Protección San Matías-San Carlos, and the Reserva Comunal Yanesha. A planned project for the period 2006-2035 would conserve 4000 ha of forest in a proposed 7000 ha Área de Conservación Municipale de Chontabamba and establish 5600 ha of natural regeneration and 1400 ha of native species plantations, laid out in fajas de enriquecimiento (contour plantings), to reforest 7000 ha of agricultural land. Forest inventories of seven sites covering 22.6 ha in primary forest and 17 sites covering 16.5 ha in secondary forest measured 17 073 trees of diameter ≥ 10 cm. The 24 sites host trees of 512 species, 267 genera, and 69 families. We could not identify the family of 7% of the trees or the scientific species of 21% of the trees. Species richness is 346 in primary forest and 257 in the secondary forest. In primary forest, 90% of aboveground biomass resides in old-growth species. Conversely, in secondary forest, 66% of aboveground biomass rests in successional species. The density of trees of diameter ≥ 10 cm is 366 trees ha -1 in primary forest and 533 trees ha -1 in secondary forest, although the average diameter is 24 ± 15 cm in primary forest and 17 ± 8 cm in secondary forest. Using Amazon forest biomass equations and wood densities for 117 species, aboveground biomass is 240 ± 30 t ha -1 in the primary sites and 90 ± 10 t ha -1 in the secondary sites. Aboveground carbon density is 120 ± 15 t ha -1 in primary forest and 40 ± 5 t ha -1 in secondary forest. Forest stands in the secondary forest sites range in age from 10 to 42 y. Growth in biomass (t ha -1 ) as a function of time (y) follows the relation: biomass = 4.09 -0.017 age 2 (p < 0.001). Aboveground biomass and forest species richness are positively correlated (r 2 = 0.59, p < 0.001). Analyses of Landsat data show that the land cover of the 3700 km 2 of non-cloud areas in 1999 was: closed forest 78%; open forest 12%, low vegetation cover 4%, sparse vegetation cover 6%. Deforestation from 1987 to 1999 claimed a net 200 km 2 of forest, proceeding at a rate of 0.005 y -1

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Section: Resultssupporting

confidence: 83%

Forest Restoration Carbon Analysis of Baseline Carbon Emissions and Removal in Tropical Rainforest at La Selva Central, Peru

González¹,

Kroll²,

Vargas³

2006

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“…La cuantificación, determinación de causas y efectos de la deforestación ha sido ampliamente reportada para ecosistemas tropicales, especialmente en regiones de la Amazonía (Laurance et al 2002, de Barros et al 2005, Armenteras et al 2006, D'Almeida et al 2006, Etter et al 2006, Zimmermann et al 2006. Sin embargo, en los bosques templados de Chile es aún incipiente la investigación que contribuye a explicar este proceso (Lara et al 1989, Bustamante y Castor 1998, Olivares 1999.…”

Section: Introductionunclassified

“…Esto concuerda con Aplin (2004), quien destaca el aumento en la exactitud en la clasificación de la cobertura del suelo en estudios con imágenes satelitales al utilizar información auxiliar como datos geofísicos de elevación, temperatura, caminos y ríos. Una breve revisión de los últimos estudios publicados de cambios de la cobertura del suelo con aplicación de sensores remotos muestra valores de exactitud global similares o inferiores a los obtenidos en el presente estudio (de Barros et al 2005, Boletta et al 2006, Gaveau et al 2007, lo cual ayuda a que las estimaciones de los cambios sean confiables. Otro factor incidente en la alta exactitud alcanzada fue el intenso trabajo de terreno para A B identificar las diferentes coberturas del suelo, logrando establecer más de 300 puntos de referencia distribuidos en las diferentes coberturas.…”

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Deforestación en ecosistemas templados de la precordillera andina del centro-sur de Chile

Altamirano

Lara

2010

Bosque (Valdivia)

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SUMMARYA multitemporal analysis to determine the land cover change was conduced in the pre-Andean range of Maule region of Chile. We used satellite imagery from the year 1989 and 2003 to analyze the likely causes of native forest change. In this period, there was a reduction in native forest area of 44% in the study area, which is equivalent to an annual forest loss rate of 4.1%. The native forest area is replaced by shrublands (29%) and exotic forest plantations (27%). A great proportion of current exotic forest plantations are established on lands that were native forest in 1989 (63%). Most forest loss was associated with intermediate elevation and less distance to road network, where native forest area dominated. Native forest replacing by shrublands was associated to selective forest logging and firewood, which leads to degradation of these forests. Native forest replacing by exotic forest plantations was the result of the forestation incentive and an increase in the demand for forest products such as wood and pulp. Because of multiple impacts of the forest loss, we propose to focus the government incentives. Priority areas for incentives must be characterized by high forest loss rate and poverty, presence of threatened species and low availability of water from catchments. Moreover, we propose to prioritize the connectivity of the current network protected areas and to develop an effective forest management monitoring system using advanced technologies.Key words: Maule region, native forest, multitemporal analysis, remote sensing, land cover. RESUMENSe realizó un análisis multitemporal para determinar los cambios en la cobertura del suelo en una zona de la precordillera andina de la Región del Maule, Chile. Para ello se utilizaron imágenes satelitales de los años 1989 y 2003, y se analizaron las causas probables de la deforestación del bosque nativo presente en estos ecosistemas. El bosque nativo se redujo en un 44%, lo cual se traduce en una tasa de deforestación de 4,1% anual. La superficie de bosque nativo fue reemplazada preferentemente por coberturas de matorral (29%) y plantaciones de especies exóticas (27%). Una gran proporción de las actuales plantaciones exóticas está establecida sobre terrenos que anteriormente correspondían a bosque nativo (63%). La mayor pérdida de bosque nativo se concentra en niveles de elevación intermedia, donde se encuentra la mayor superficie de bosque nativo, asociándose también a una menor distancia de la red de caminos. El reemplazo del bosque nativo por matorrales se asocia principalmente a prácticas de floreo y extracción de leña, lo cual produce la degradación del bosque. La sustitución de bosque nativo por especies exóticas se explica por el incentivo a la forestación y por la creciente demanda de productos derivados de la madera y pulpa. Debido a los múltiples impactos que produce la deforestación se propone focalizar los incentivos estatales en áreas con altos niveles de deforestación y pobreza, presencia de especies amenazadas y menor disponibilidad de agua desde...

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“…Its distribution and pattern follow the road, since the road trigger settlement establishment. Land forest clearing for agriculture was conducted near road and has left only a small part of forest among cleared land (Arima et al 2005;Feraz et al 2005;Fearnside 2007). Further, the road increase connectivity among settlement centre that could threat forests sustainability (Fearnside 2008).…”

Section: Forest Landscape Fragmentation (Flf) Of Batangmentioning

confidence: 99%

Analysis of Tropical Forest Landscape Fragmentation in Batang Toru Watershed, North Sumatra

Samsuri

Jaya

Kusmana

et al. 2014

jtfm

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Landscape dynamics of Amazonian deforestation between 1984 and 2002 in central Rondônia, Brazil: assessment and future scenarios

Cited by 71 publications

References 48 publications

Forest Restoration Carbon Analysis of Baseline Carbon Emissions and Removal in Tropical Rainforest at La Selva Central, Peru

Forest Restoration Carbon Analysis of Baseline Carbon Emissions and Removal in Tropical Rainforest at La Selva Central, Peru

Deforestación en ecosistemas templados de la precordillera andina del centro-sur de Chile

Analysis of Tropical Forest Landscape Fragmentation in Batang Toru Watershed, North Sumatra

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