Spatial distribution of soil surface coverage on north and south facing hillslopes along a Mediterranean to extreme arid climatic gradient

Kutiel, Pua; Lavee, H.; Ackermann, Oren

doi:10.1016/s0169-555x(98)00007-5

Cited by 48 publications

(38 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Entre os fatores que podem estar contribuindo para tal estão as diferenças no desenvolvimento da vegetação (Marqués & Mora, 1992;Kutiel et al, 1998;Chen et al, 2007) e na acumulação de carbono orgânico no solo (Franzmeier et al, 1969;Bredja et al, 2001;Miller et al, 2004;Thompson & Kolka, 2005) entre as encostas, que podem variar em razão da temperatura e disponibilidade de água condicionadas pelo aspecto. Resultados obtidos por Marqués & Mora (1992) confirmaram o contraste nas perdas de solo de acordo com o aspecto, com os solos das encostas sul (> evapotranspiração e < disponibilidade de água) apresentando perdas superiores aos das encostas norte, que foram associadas ao estado da vegetação e desenvolvimento do solo.…”

Section: Influência Dos Atributos Topográficos Nas Características Dounclassified

Atributos topográficos na diferenciação de Argissolos

Chagas

Fontana

Carvalho

et al. 2013

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

A topografia do terreno controla muitos processos hidrológicos, geomorfológicos e pedológicos, influenciando a radiação solar, precipitação pluvial, escoamento superficial, evaporação, regime de umidade do solo e tipo de vegetação, entre outros. Desta maneira, atributos topográficos derivados de um modelo digital de elevação foram utilizados para explicar a diferenciação de solos com horizonte B textural da região de ''Mar de Morros'', no noroeste do Estado do Rio de Janeiro. Foram estudados oito perfis de solo (quatro Argissolos Vermelhos e quatro Argissolos Vermelho-Amarelos), desenvolvidos de granulitos noríticos nos municípios de São José de Ubá e Itaperuna. Os dados dos atributos topográficos em cada perfil de solo (elevação, declividade, aspecto, plano e perfil de curvatura, radiação solar e índice topográfico combinado) foram extraídos, utilizando-se uma janela de 7 x 7 pixels, com os perfis ocupando o centro dessa janela. Os Argissolos que ocorrem nas encostas noroeste e nordeste recebem maior quantidade de radiação solar (mais quentes e secas) e por isto são vermelhos, eutróficos e não apresentam horizonte B latossólico, enquanto os solos das encostas sudeste (relativamente mais frias e úmidas) são vermelho-amarelados, distróficos e com horizonte B latossólico. A radiação solar, a declividade e o aspecto são os atributos topográficos relacionados com as diferenças entre os perfis de solos estudados. Os atributos topográficos analisados pelas técnicas multivariadas apresentaram-se efetivos para a distinção entre os Argissolos Vermelho-Amarelos distróficos e os Argissolos Vermelhos eutróficos, exceto o P7 (PVe). Estudos relacionando a influência da radiação solar na pedogênese são escassos em condições tropicais e, embora menos atuante em regiões tropicais, foi a radiação solar que determinou diretamente a diferenciação dos solos da área estudada.

show abstract

Section: Influência Dos Atributos Topográficos Nas Características Dounclassified

Atributos topográficos na diferenciação de Argissolos

Chagas

Fontana

Carvalho

et al. 2013

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

show abstract

“…When a Mediterranean}extreme arid transect is considered, plant cover is higher and higher life forms occur in the Mediterranean region, whereas in the arid regions lower cover and lower life forms, mainly annuals and cryptogams (sensu Raunkaier), predominate. A drastic decline in species richness occurs from the Mediterranean region to the extreme arid region (Aronson & Shmida, 1992;Kutiel et al, 1995;Kutiel et al, 1998). Several studies have dealt with the issue of vegetation diversityrainfall relationships, and it has been concluded that there is a lack of clear correlation between rainfall and species diversity, except for certain sites or annual rainfall up to 400 mm year !1 (Bowers, 1987;Aronson & Shmida, 1992;Ward & Olsvig-Whittaker, 1993).…”

Section: Introductionmentioning

confidence: 96%

“…Vegetation characteristics vary along climatic gradients (Whittaker, 1975;Ghazanfar, 1991;Ward & Olsvig-Whittaker, 1993;Shoshany et al, 1994Shoshany et al, , 1995Shoshany et al, , 1996Kutiel et al, 1995;Kutiel et al, 1998). When a Mediterranean}extreme arid transect is considered, plant cover is higher and higher life forms occur in the Mediterranean region, whereas in the arid regions lower cover and lower life forms, mainly annuals and cryptogams (sensu Raunkaier), predominate.…”

Section: Introductionmentioning

confidence: 97%

Vegetation response to possible scenarios of rainfall variations along a Mediterranean–extreme arid climatic transect

Kutiel

Lavee

2000

Journal of Arid Environments

View full text Add to dashboard Cite

“…They are used for extensive grazing by goats and sheep. South-facing slopes show lower vegetation density and higher proportion of bare soil and rock outcrops than the north-facing slopes, where the presence of biogenic crusts was reported (Kutiel et al, 1998). Minor land use types consist of scattered built-up areas, olive plantations on terraced land and rainfed or partly irrigated agricultural land (annual and perennial crops, herbs and vegetables) in valley bottoms.…”

Section: Study Areamentioning

confidence: 99%

Recharge estimation and soil moisture dynamics in a Mediterranean, semi-arid karst region

Ries

Lange

Schmidt³

et al. 2015

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. Knowledge of soil moisture dynamics in the unsaturated soil zone provides valuable information on the temporal and spatial variability of groundwater recharge. This is especially true for the Mediterranean region, where a substantial fraction of long-term groundwater recharge is expected to occur during high magnitude precipitation events of aboveaverage wet winters. To elucidate process understanding of infiltration processes during these extreme events, a monitoring network of precipitation gauges, meteorological stations, and soil moisture plots was installed in an area with a steep climatic gradient in the Jordan Valley region. In three soil moisture plots, Hydrus-1D was used to simulate water movement in the unsaturated soil zone with soil hydraulic parameters estimated by the Shuffled Complex Evolution Metropolis algorithm. To generalize our results, we modified soil depth and rainfall input to simulate the effect of the pronounced climatic gradient and soil depth variability on percolation fluxes and applied the calibrated model to a time series with 62 years of meteorological data.Soil moisture measurements showed a pronounced seasonality and suggested rapid infiltration during heavy rainstorms. Hydrus-1D successfully simulated short and longterm soil moisture patterns, with the majority of simulated deep percolation occurring during a few intensive rainfall events. Temperature drops in a nearby groundwater well were observed synchronously with simulated percolation pulses, indicating rapid groundwater recharge mechanisms. The 62-year model run yielded annual percolation fluxes of up to 66 % of precipitation depths during wet years and of 0 % during dry years. Furthermore, a dependence of recharge on the temporal rainfall distribution could be shown. Strong correlations between depth of recharge and soil depth were also observed.

show abstract

Spatial distribution of soil surface coverage on north and south facing hillslopes along a Mediterranean to extreme arid climatic gradient

Cited by 48 publications

References 22 publications

Atributos topográficos na diferenciação de Argissolos

Atributos topográficos na diferenciação de Argissolos

Vegetation response to possible scenarios of rainfall variations along a Mediterranean–extreme arid climatic transect

Recharge estimation and soil moisture dynamics in a Mediterranean, semi-arid karst region

Contact Info

Product

Resources

About