• Home
  • Juan I. Whitworth-Hulse
Juan I. Whitworth-Hulse

Juan I. Whitworth-Hulse
National University of San Luis, Argentina · Instituto de Matemática Aplicada San Luis (IMASL) - CONICET

Dr. Biological Sciences

About

33
Publications
9,116
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
664
Citations

Publications

Publications (33)
Article
Full-text available
Native forests host important pools of soil organic carbon (SOC). This is a key element not only for ecosystem functioning, but also for the global carbon cycle. Globally, and particularly in Argentina, native forests are being rapidly replaced by other land uses, raising questions about the impact of these transformations on SOC and its environmen...
Article
Full-text available
Plant invasion is one of the major global environmental threats with the potential to alter the ecosystem stability and functioning. In water-limited ecosystems, the impacts of non-native invasive trees on the water balance are particularly relevant since they can compromise the use of water by native taxa of the ecosystem and water provision for h...
Poster
Full-text available
El reemplazo de los ecosistemas nativos por agroecosistemas es uno de los principales impulsores del cambio ambiental global. El manejo de estos sistemas tiende a maximizar la producción de bienes de consumo en detrimento de la biodiversidad y los servicios ecosistémicos (SE). Actualmente, un 31% de la superficie de Sudamérica está bajo manejo prod...
Article
Full-text available
En sistemas con lluvias estacionales, el rendimiento hídrico (caudal de salida del curso de agua relativo al área de la cuenca) en la estación seca depende de las lluvias previas y de la infiltración y la evapotranspiración, procesos que, a su vez, están afectados por las características del paisaje. Nuestro objetivo fue evaluar el efecto de distin...
Article
Regional effects of farming on hydrology are associated mostly with irrigation. In this work, we show how rainfed agriculture can also leave large-scale imprints. The extent and speed of farming expansion across the South American plains over the past four decades provide an unprecedented case of the effects of rainfed farming on hydrology. Remote...
Article
Full-text available
As global warming intensifies climatic extremes, the need to understand their effects on farming systems, particularly under rainfed conditions, grows. During the last three decades the Argentine Pampas, a major global grain exporter, hosted an unprecedented expansion of cultivation under unirrigated and undrained conditions. Simultaneously, the ex...
Article
Argentina has a long tradition of agricultural systems that use few amounts of fertilizers. However, the crop nutrient balance remains unknown throughout the country. In this study, we estimated the nitrogen (N), phosphorus (P) and sulfur (S) balance at national and subnational scale of the six major grain crops: soybean, maize, wheat, sunflower, b...
Article
Rainfall partitioning by plant canopies can play key roles in dryland ecohydrology by altering the amount, timing and patterns of water receipt to soils. Here, we synthesized interception, throughfall and stemflow observations from 2,297 rainfall events across 40 dryland sites, including 48 plant species. Then, we developed general empirical models...
Article
There are about 2200 cactus species, and most of them occur in fire‐prone ecosystems. Nevertheless, there is scarce information about fire effects on the ecology of cactus species. In this study, we assessed the effects of a wildfire on the survival and growth of coexisting globose cactus species and their relation with microenvironment conditions...
Article
Aim: Invasive species have the potential to alter hydrological processes by changing the local water balance. However, general patterns of how rainfall is partitioned into interception, throughfall and stemflow for invasive species worldwide have been seldom explored. We (a) describe the percentage of interception, throughfall and stemflow for inva...
Article
Wildfires are recurrent in seasonally-dry ecosystems; however, their effects on streamflows at the end of the dry season (low flows) are not well understood. The infiltration-evapotranspiration trade-off hypothesis postulates that when vegetation cover is lost or degraded, low flows in the following dry season are reduced due to impaired water infi...
Article
Full-text available
The replacement of native dry forests by commercial (exotic) tree plantations could generate changes in rainfall partitioning, which further affects the water cycle. In this study, we determined (i) the rainfall partitioning into interception, throughfall and stemflow, (ii) the role of rainfall event size on rainfall partitioning, (iii) the pH of w...
Article
Full-text available
Ligustrum lucidum is a highly invasive East Asian tree that successfully colonizes several subtropical and temperate areas around the world. Its invasion capacity results from a widespread human use mostly in urban and periurban settings, very abundant fruit and seed production, small bird-dispersed fruits, high germination rates, resprouting capac...
Article
Vegetation canopy plays a key role in the local water balance by partitioning rainfall into interception, throughfall and stemflow in dry forests. Many invasive plants have the capacity to replace native species and alter the net amount and spatial distribution of rainfall reaching the soil. In this paper, we aimed to compare the rainfall partition...
Article
Full-text available
Rainfall partitioning into interception loss, throughfall and stemflow affects the amount and the spatial heterogeneity of water entering into the soil at the patch scale, strongly controlling net primary productivity of drylands. In this paper, we explored rainfall partitioning and its biophysical controls in Larrea divaricata (jarilla), one of th...
Article
Nowadays forests, which were formerly considered resistant to invasion due to its shady understories, are been transformed to invaded landscapes. Thus, the aim of this study was to evaluate the regeneration of native woody species in Ligustrum lucidum invaded woodlands. In addition, we aim to identify the main environmental differences between the...
Article
Aim Existing global models to predict standing biomass are based on trees characterized by a single principal stem, well developed in height. However, their use in open woodlands and shrublands, characterized by multistemmed species with substantial crown development, generates a high level of uncertainty in biomass estimates. This limitation led u...
Article
Full-text available
The net amount of rainfall entering into the soil and its spatial distribution at the patch scale are key drivers of ecosystem processes in drylands. The spatial distribution of water is mainly controlled by vegetation canopy which determines the partitioning of rainfall into interception, throughfall and stemflow. In this paper, we synthesized and...
Article
Full-text available
Seed dispersal by vertebrate frugivores plays an important role in plant population dynamics and community structure. The gut treatment may modify the germination response of seeds; often the specific effects of seed ingestion are not consistent among frugivorous taxa. In the Chaco mountain woodlands of Argentina, an ecosystem threatened by human a...
Article
Full-text available
Aims In the context of global change, the impacts of forest structure alteration on climbing plants in extra-tropical ecosystems are poorly understood. It also remains little explored, the functional strategies among climbing plant species and its relationship with the local-scale distribution of climbing plant communities. Here, we aimed at three...
Article
Full-text available
Soil water storage capacity and flow regulation relies mostly upon infiltration rate and soil depth. Disturbs such as grazing and fire strongly modulate the vegetation-soil system, and are capable of altering the infiltration rate and soil depth, as well. In mountain seasonal ecosystems, this impacts on soil capacity to slowly release water into st...
Article
Full-text available
La capacidad del suelo de almacenar y regular el flujo de agua depende en gran medida de su su tasa de infiltración y profundidad. Los disturbios como el pastoreo y el fuego son moduladores fuertes del sistema vegetación-suelo, ya que son capaces de alterar la tasa de infiltración y la profundidad del suelo. En sistemas montanos estacionales, esto...
Article
Livestock grazing represents an important human disturbance for vegetation worldwide. We analysed the intraspecific differences in mean trait values between different grazing regimes (ungrazed and grazed) and explored whether these differences are consistent across species in a sub-humid mountain ecosystem in Central Argentina. We selected 14 speci...
Article
In this study we assessed the water transport strategies and the abundance of alien and native tree species at a regional scale in Córdoba Mountains, Central Argentina. The aims of this study were: (i) to analyse whether alien and native tree species show divergent water transport strategies; and (ii) to explore whether species abundances of alien...
Data
Full-text available
Soil erosion, as a result of livestock grazing, has been widely reported for arid and semiarid ecosystems, but information is lacking in more mesic ecosystems where erosion is generally studied in relation to agriculture. To test the hypothesis that, in the high-mountain rangelands of Córdoba (Argentina), grazing by livestock can drive the system i...
Article
Full-text available
Soil erosion, as a result of livestock grazing, has been widely reported for arid and semiarid ecosystems, but information is lacking in more mesic ecosystems where erosion is generally studied in relation to agriculture. To test the hypothesis that, in the high-mountain rangelands of Crdoba (Argentina), grazing by livestock can drive the system in...

Network

Cited By
    • Instituto Multidisciplinario de Biología Vegetal, Universidad nacional de Córdoba, CONICET
    • Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences
    • Instituto Gulich CONAE-UNC-CONICET y Facultad de CEF y Naturales. Universidad Nacional de Cordoba.
    • Instituto de Diversidad y Ecología Animal (CONICET & UNC) Córdoba Argentina
    • National Scientific and Technical Research Council