Tropical Deforestation and Pasture Development

Buschbacher, R.

doi:10.2307/1309794

Cited by 74 publications

(41 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Current estimates of these fluxes have largely been based on model calculations with deforestation values much higher than we report. In addition, many deforested areas are in stages of regrowth following abandonment (26). If regrowth is widespread, estimates of the net flux of carbon should be further reduced because carbon accumulates in regrowing biomass.…”

Section: Deforestation and Forest Fragmentationmentioning

confidence: 99%

Tropical Deforestation and Habitat Fragmentation in the Amazon: Satellite Data from 1978 to 1988

Skole

Tucker

1993

Science

1,343

711

View full text Add to dashboard Cite

Landsat satellite imagery covering the entire forested portion of the Brazilian Amazon Basin was used to measure, for 1978 and 1988, deforestation, fragmented forest, defined as areas less than 100 square kilometers surrounded by deforestation, and edge effects of 1 kilometer into forest from adjacent areas of deforestation. Tropical deforestation increased from 78,000 square kilometers in 1978 to 230,000 square kilometers in 1988 while tropical forest habitat, severely affected with respect to biological diversity, increased from 208,000 to 588,000 square kilometers. Although this rate of deforestation is lower than previous estimates, the effect on biological diversity is greater.

show abstract

Section: Deforestation and Forest Fragmentationmentioning

confidence: 99%

Tropical Deforestation and Habitat Fragmentation in the Amazon: Satellite Data from 1978 to 1988

Skole

Tucker

1993

Science

1,343

711

View full text Add to dashboard Cite

show abstract

“…Domesticated grazing livestock are typically adapted to grasslands and savannas, so their ecological alteration of these biomes tends to be less novel, except when stocking rates are very high [118,119]. In woodlands, however, forests must generally be cleared to sustain substantial populations of domestic livestock, so the development of rangelands in these biomes tends to produce intense and novel alteration of ecosystems, pushing forest cover, NPP and organic carbon accumulation into decline, and dramatically increasing the abundance of exotic species along with domesticated forages [118,120,121]. In savannas, shrublands and grasslands, rangeland development may produce only minor alteration of land cover and NPP, depending on the extent and intensity of land clearing and grazing [118,120].…”

Section: Intensity and Novelty Of Ecological Changes Within Anthromesmentioning

confidence: 99%

“…In woodlands, however, forests must generally be cleared to sustain substantial populations of domestic livestock, so the development of rangelands in these biomes tends to produce intense and novel alteration of ecosystems, pushing forest cover, NPP and organic carbon accumulation into decline, and dramatically increasing the abundance of exotic species along with domesticated forages [118,120,121]. In savannas, shrublands and grasslands, rangeland development may produce only minor alteration of land cover and NPP, depending on the extent and intensity of land clearing and grazing [118,120]. Yet, even in savannas and grasslands, exotic species tend to become established at high rates in grazed areas, and, when especially intense, can include encroachment by woody and other species unpalatable to domesticated herbivores [121].…”

Section: Intensity and Novelty Of Ecological Changes Within Anthromesmentioning

confidence: 99%

“…Other ecological effects common across rangelands include increased fire rates at low human population densities and fire suppression at higher populations [41]. Overall, however, development of rangelands within woodlands causes far more intense and novel alteration of ecosystems than in grasslands, savannas and shrublands [85,[118][119][120]122].…”

Section: Intensity and Novelty Of Ecological Changes Within Anthromesmentioning

confidence: 99%

See 1 more Smart Citation

Anthropogenic transformation of the terrestrial biosphere

Ellis

2011

Phil. Trans. R. Soc. A.

680

425

View full text Add to dashboard Cite

Human populations and their use of land have transformed most of the terrestrial biosphere into anthropogenic biomes (anthromes), causing a variety of novel ecological patterns and processes to emerge. To assess whether human populations and their use of land have directly altered the terrestrial biosphere sufficiently to indicate that the Earth system has entered a new geological epoch, spatially explicit global estimates of human populations and their use of land were analysed across the Holocene for their potential to induce irreversible novel transformation of the terrestrial biosphere. Human alteration of the terrestrial biosphere has been significant for more than 8000 years. However, only in the past century has the majority of the terrestrial biosphere been transformed into intensively used anthromes with predominantly novel anthropogenic ecological processes. At present, even were human populations to decline substantially or use of land become far more efficient, the current global extent, duration, type and intensity of human transformation of ecosystems have already irreversibly altered the terrestrial biosphere at levels sufficient to leave an unambiguous geological record differing substantially from that of the Holocene or any prior epoch. It remains to be seen whether the anthropogenic biosphere will be sustained and continue to evolve.

show abstract

“…En algunas áreas forestales protegidas del mundo, la actividad ganadera se le puede responsabilizar parcialmente de la deforestación, erosión y extinción de especies (Dewalt, 1983, Bushbacher, 1986, Fleischner, 1994, así como el retraso o inhibición del proceso de reemplazo sucesional de los pinos por latifoliadas (Sánchez, 1988, Saldaña y Jardel, 1991, Sánchez y García, 1993. En algunas áreas del mundo se han podido demostrar cambios en la estructura y composición provocados por el pastoreo, haciendo que el número de ciertas especies vegetales sea significativamente menor que en sitios sin pastoreo (Pettit et al, 1995).…”

Section: Introductionunclassified

Efecto de la ganadería extensiva sobre la regeneración arbórea de los bosques de la Sierra de Manantlán

Vargas

Sánchez-Velásquez

Valdovinos

et al. 2016

MYB

View full text Add to dashboard Cite

La Estación Científica Las Joyas (ECLJ) de la Sierra de Manantlán ha tenido un fuerte historial de perturbaciones. En 1988 se instaló un cerco perimetral que delimitó la estación, quedando esta área exenta de perturbaciones antrópicas. El cercado dividió diferentes rodales de bosque mesófilo de montaña, de pino y de pinoencino, quedando estos rodales con áreas de bosque con-ganado y otras sin-ganado. El estudio se realizó en estos bosques, usando dos réplicas y colocando aleatoriamente 180 cuadros de 2x2 m, 90 cuadros fuera de la ECLJ y el resto adentro. En estos cuadros se registró la regeneración arbórea (especie, densidad y altura). Se registraron 38 especies pertenecientes a 33 familias y 35 géneros. El número de árboles jóvenes fue significativamente diferente entre los sitios sin-ganado vs con-ganado (en todos los casos χ2 >7.5 y p <0.001) y la composición florística también fue diferente. Inga hintonii y Alnus jorullensis, son especies que no se encontraron en lugares conganado, esto sugiere que son especies potenciales a extinguirse en presencia del ganado. Las especies, Xylosma flexuosum y Pinus douglasiana, presentaron valores significativos de importancia en los sitios con-ganado en el bosque mesófilo de montaña y pino-encino, respectivamente. En el bosque de pino, tanto en sitios con y sin-ganado, las especies con mayor valor de importancia fueron; Pinus douglasiana y Prunus serotina. Se concluye que el ganado bovino está ejerciendo un cambio en la composición florística y en la disminución del número de árboles jóvenes por hectárea en los tres tipos de vegetación estudiados.

show abstract

Tropical Deforestation and Pasture Development

Cited by 74 publications

References 17 publications

Tropical Deforestation and Habitat Fragmentation in the Amazon: Satellite Data from 1978 to 1988

Tropical Deforestation and Habitat Fragmentation in the Amazon: Satellite Data from 1978 to 1988

Anthropogenic transformation of the terrestrial biosphere

Efecto de la ganadería extensiva sobre la regeneración arbórea de los bosques de la Sierra de Manantlán

Contact Info

Product

Resources

About