Estrutura e composição florística de um Cerrado sensu stricto e sua importância para propostas de restauração ecológica

Reys, P; Camargo, Maria Gabriela Gutierrez; Grombone-Guaratini, Maria Tereza; Teixeira, Aloysio de Pádua; Assis, Marco Antônio; Morellato, Leonor Patrícia Cerdeira

doi:10.1590/s2236-89062013000300005

Cited by 30 publications

(49 citation statements)

References 51 publications

(50 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The absolute density was 15 278 individual trees per hectare, with a basal area (area occupied by the cross-section of the tree's trunk at breast height) of 27.75 m 2 ha -1 and Shannon diversity index of 4.03 in our study area, which are similar to values found in other Cerrado areas (Reys, 2008). According to Reys et al (2013) the main vegetation species found in the study area are: Vochysia tucanorum; Miconia rubiginosa; Pterodon pubescens; Ocotea pulchella; Xylopia aromatica; Copaifera langsdorfii; Myrcia splendens; Bauhinia rufa; Virola sebifera; and Myrcia guianensis. Details about the phenology of the study area can be found in Reys (2008) and Reys et al (2013).…”

Section: Study Areamentioning

confidence: 99%

“…According to Reys et al (2013) the main vegetation species found in the study area are: Vochysia tucanorum; Miconia rubiginosa; Pterodon pubescens; Ocotea pulchella; Xylopia aromatica; Copaifera langsdorfii; Myrcia splendens; Bauhinia rufa; Virola sebifera; and Myrcia guianensis. Details about the phenology of the study area can be found in Reys (2008) and Reys et al (2013).…”

Section: Study Areamentioning

confidence: 99%

See 1 more Smart Citation

Orders of magnitude increase in soil erosion associated with land use change from native to cultivated vegetation in a Brazilian savannah environment

Oliveira

Nearing

Wendland

2015

Earth Surf Processes Landf

View full text Add to dashboard Cite

The Brazilian savanna (cerrado) is a large and important economic and environmental region that is experiencing significant loss of its natural landscapes due to pressures of food and energy production, which in turn has caused large increases in soil erosion. However the magnitude of the soil erosion increases in this region is not well understood, in part because scientific studies of surface runoff and soil erosion are scarce or nonexistent in the cerrado as well as in other savannahs of the world. To understand the effects of deforestation we assessed natural rainfall-driven rates of runoff and soil erosion on an undisturbed tropical woodland classified as 'cerrado sensu stricto denso' and bare soil. Results were evaluated and quantified in the context of the cover and management factor (C-factor) of the Universal Soil Loss Equation (USLE). Replicated data on precipitation, runoff, and soil loss on plots (5 × 20 m) under undisturbed cerrado and bare soil were collected for 77 erosive storms that occurred over 3 years (2012 through 2014). C-factor was computed annually using values of rainfall erosivity and soil loss rate. We found an average runoff coefficient of~20% for the plots under bare soil and less than 1% under undisturbed cerrado. The mean annual soil losses in the plots under bare soil and cerrado were 12.4 t ha -1 yr -1 and 0.1 t ha -1 yr -1, respectively. The erosivity-weighted C-factor for the undisturbed cerrado was 0.013. Surface runoff, soil loss and C-factor were greatest in the summer and fall. Our results suggest that shifts in land use from the native to cultivated vegetation result in orders of magnitude increases in soil loss rates. These results provide benchmark values that will be useful to evaluate past and future land use changes using soil erosion models and have significance for undisturbed savanna regions worldwide.

show abstract

Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Orders of magnitude increase in soil erosion associated with land use change from native to cultivated vegetation in a Brazilian savannah environment

Oliveira

Nearing

Wendland

2015

Earth Surf Processes Landf

View full text Add to dashboard Cite

show abstract

“…This vegetation grows on an oxisol, which is sandy, acidic (pH < 4.0), low in availability of macronutrients and high in exchangeable Al (Reys et al 2013). The climate in this region is classified as Cwa (Köppen 1948) with wet summer and dry winter.…”

Section: Study Site and Species Selectionmentioning

confidence: 99%

Ecological strategies of Al-accumulating and non-accumulating functional groups from the cerrado sensu stricto

Souza

Bueno

Morellato

et al. 2015

An. Acad. Bras. Ciênc.

View full text Add to dashboard Cite

The cerrado's flora comprises aluminum-(Al) accumulating and non-accumulating plants, which coexist on acidic and Al-rich soils with low fertility. Despite their existence, the ecological importance or biological strategies of these functional groups have been little explored. We evaluated the leaf flushing patterns of both groups throughout a year; leaf concentrations of N, P, K, Ca, Mg, S, Al, total flavonoids and polyphenols; as well as the specific leaf area (SLA) on young and mature leaves within and between the groups. In Al-accumulating plants, leaf flushed throughout the year, mainly in May and September; for non-accumulating plants, leaf flushing peaked at the dry-wet seasons transition. However, these behaviors could not be associated with strategies for building up concentrations of defense compounds in leaves of any functional groups. Al-accumulating plants showed low leaf nutrient concentrations, while non-accumulating plants accumulated more macronutrients and produced leaves with high SLA since the juvenile leaf phase. This demonstrates that the increase in SLA is slower in Al-accumulating plants that are likely to achieve SLA values comparable to the rest of the plant community only in the wet season, when sunlight capture is important for the growth of new branches.

show abstract

“…The device was designed to be easily transported and installed in the field, more specifically in a 300-ha wooded Cerrado area (a tropical woodland) located in the municipality of Itirapina, São Paulo state, Brazil (latitude 22°10′ S, longitude 47°52′ W; Figure 1). The vegetation density in this undisturbed forest is estimated as 15,522 individuals per hectare, and the largest trunk diameter and highest canopy found were 34.7 cm and 12 m, respectively (Reys et al, 2013). The climate classification for this area is Cwa subtropical characterized as hot and rainy summer (October to March) and dry winter (April to September) according to the Köppen climate classification.…”

Section: Study Areamentioning

confidence: 91%

Understanding the water dynamics on a tropical forest litter using a new device for interception measurement

2018

View full text Add to dashboard Cite

Forest litter is a layer on the forest floor formed by materials falling from the vegetation. It plays an important role in the interception process in forests and, combined with canopy interception, can represent up to 50% of the total evaporation. However, the forest litter interception is usually underestimated and has been neglected mainly because of the difficulties in performing these measurements. This paper presents an equipment called Litter Interception Device (LID), which can be used both in laboratory and on site to measure the forest litter interception and the intensity of water flux to the soil. We tested and calibrated the LID in laboratory using three different simulated rainfall intensities above three different litter samples amounts. The samples were collected in an undisturbed wooded Cerrado area located in the state of São Paulo, Brazil. The maximum and minimum water storage capacities of the wooded Cerrado litter ranged between 1.0–3.07 and 0.78–2.27 mm, respectively. The device enables continuous measurements of the litter interception with 0.006 mm min−1 of precision and can assist future studies on the role of forest litter on hydrological processes and water balance improvements.

show abstract

Estrutura e composição florística de um Cerrado sensu stricto e sua importância para propostas de restauração ecológica

Cited by 30 publications

References 51 publications

Orders of magnitude increase in soil erosion associated with land use change from native to cultivated vegetation in a Brazilian savannah environment

Orders of magnitude increase in soil erosion associated with land use change from native to cultivated vegetation in a Brazilian savannah environment

Ecological strategies of Al-accumulating and non-accumulating functional groups from the cerrado sensu stricto

Understanding the water dynamics on a tropical forest litter using a new device for interception measurement

Contact Info

Product

Resources

About