Tonantzin Tarin

Tonantzin Tarin
Universidad Nacional Autónoma de México | UNAM · Institute of Ecology

Doctor of Philosophy

About

26
Publications
17,638
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765
Citations
Introduction
Researcher scientist in ecophysiology, plant physiology, ecohydrology, terrestrial ecosystems.
Additional affiliations
November 2012 - June 2014
Instituto Tecnológico de Sonora
Position
  • Research Assistant
May 2007 - December 2007

Publications

Publications (26)
Article
Soil nitrogen (N) is an important driver of plant productivity and ecosystem functioning; consequently, it is critical to understand its spatial variability from local‐to‐global scales. Here, we provide a quantitative assessment of the three‐dimensional spatial distribution of soil N across the United States (CONUS) using a digital soil mapping app...
Article
Full-text available
México está comprometido a alcanzar cero emisiones netas de carbono y limitar el incremento de la temperatura media global a 1.5 o C debido al cambio climático. Para lograrlo se ha planteado implementar programas de mitigación como Soluciones Climáticas Naturales (SCN) a través de la restauración, conservación o mejora en la gestión de los territor...
Article
Full-text available
C4 plants frequently experience high light and high temperature conditions in the field, which reduce growth and yield. However, the mechanisms underlying these stress responses in C4 plants have been under-explored, especially the coordination between mesophyll (M) and bundle sheath (BS) cells. We investigated how the C4 model plant Setaria viridi...
Preprint
Full-text available
C4 plants frequently experience damaging high light (HL) and high temperature (HT) conditions in native environments, which reduce growth and yield. However, the mechanisms underlying these stress responses in C4 plants have been under-explored, especially the coordination between mesophyll (M) and bundle sheath (BS) cells. We investigated how the...
Article
Full-text available
The net ecosystem production and evapotranspiration (ET) of arid and subtropical ecosystems is poorly understood by the lack of measurements of CO2 and water vapor fluxes. Moreover, the contributions related to the fluxes in the different strata (i.e. understory) have been poorly studied. The present investigation estimates ET and CO2 fluxes of a s...
Article
Full-text available
Evapotranspiration is the second largest component of the hydrological cycle after rainfall precipitation in semiarid regions such as northwestern Mexico. In this study, we partitioned the evapotranspiration (ET) flux using stable isotopes of water in the soil-plant-atmosphere continuum in combination with eddy covariance flux measurements. We cons...
Article
The southern hemisphere and especially Australian arid and semi-arid ecosystems played a significant role in the 2011 global land carbon sink anomaly. Arid and semi-arid regions occupy 70% of the Australian land surface, dominated by two biomes: Mulga woodlands and spinifex grasslands or savannas. We monitored carbon and water fluxes in two of thes...
Article
As the ratio of carbon uptake to water use by vegetation, water‐use efficiency (WUE) is a key ecosystem property linking global carbon and water cycles. It can be estimated in several ways, but it is currently unclear how different measures of WUE relate, and how well they each capture variation in WUE with soil moisture availability. We evaluated...
Article
Full-text available
Plant traits—the morphological, anatomical, physiological, biochemical and phenological characteristics of plants—determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research sp...
Article
Full-text available
RESUMEN El dióxido de carbono (CO 2) es uno de los principales gases de efecto invernadero (GEI) cuyo incremento en la atmósfera está asociado con el calentamiento global. Con el objetivo de promover estudios de síntesis que lleven a un mejor entendimiento de los procesos relacionados con el ciclo del carbono en ecosistemas terrestres y costeros de...
Article
Full-text available
Groundwater-dependent vegetation is globally distributed, having important ecological, social, and economic value. Along with the groundwater resources upon which it depends, this vegetation is under increasing threat through excessive rates of groundwater extraction. In this study we examined one shallow-rooted and two deep-rooted tree species at...
Article
Arid environments can support the seemingly unlikely coexistence of species tolerant of, or sensitive to, dry soil moisture. Here, we examine water-use and carbon-gain traits in two widespread tree species in central Australia: Acacia aptaneura and Eucalyptus camaldulensis. The former has a shallow root distribution and relies on soil moisture, whi...
Article
The sensitivity of semiarid ecosystems to climate change is not well understood due to competing effects of soil and plant-mediated carbon fluxes. Limited observations of net ecosystem productivity (NEP) under rising air temperature and CO2 and altered precipitation regimes also hinder climate change assessments. A promising avenue for addressing t...
Poster
Full-text available
Mulga woodlands and hummock grasslands cover vast portions of the Australian interior, where their large fluctuations in carbon budget can have global implications. Abiotic decomposition as a result of photo-degradation (i.e., light-mediated breakdown of lignin in leaf litter) can be a major source of carbon to the atmosphere in these ecosystems, e...
Article
Partitioning of water resources amongst plant species within a single climate envelope is possible if the species differ in key hydraulic traits. We examined 11 bivariate trait relationships across nine woody species found in the Ti-Tree basin of central Australia. We found that species with limited access to soil moisture, evidenced by low pre-daw...
Article
Low soil water content can limit photosynthesis by reducing stomatal conductance. Here, we explore relationships among traits pertaining to carbon uptake and pre-dawn leaf water potential (as an index of soil water availability) across eight species found in semiarid central Australia.Wefound that as pre-dawn leaf water potential declined, stomatal...
Article
Full-text available
Species are often classified along a continuum from isohydric to anisohydric, with isohydric species exhibiting tighter regulation of leaf water potential through stomatal closure in response to drought. We investigated plasticity in stomatal regulation in an isohydric (Eucalyptus camaldulensis) and an anisohydric (Acacia aptaneura) angiosperm spec...
Article
Full-text available
Mulga, comprised of a complex of closely related Acacia spp., grades from a low open forest to tall shrublands in tropical and sub-tropical arid and semi-arid regions of Australia and experiences warm-to-hot annual temperatures and a pronounced dry season. This short synthesis of current knowledge briefly outlines the causes of the extreme variabil...
Article
Full-text available
The purpose of the emergent discipline of ecohydrology is to generate knowledge to understand processes that are fundamental to ecosystems in terms of the dynamics of the hydrological cycle. During the rainy season, which coincides with high temperatures in semi-arid zones, a variety of ecological processes are triggered involving land surfaceatmos...
Article
The purpose of the emergent discipline of ecohydrology is to generate knowledge to understand processes that are fundamental to ecosystems in terms of the dynamics of the hydrological cycle. During the rainy season, which coincides with high temperatures in semi-arid zones, a variety of ecological processes are triggered involving land surface-atmo...
Article
Full-text available
RESUMEN La heterogeneidad del suelo influye ampliamente en el contenido de humedad, dificultando la precisa determinación de este parámetro en estudios con fines hidrológicos y ecológicos que requieren de mediciones continuas y representativas para escalas intermedias (~1 km). En este contexto un sensor de neutrón de rayo cósmico The COsmic-ray Soi...

Projects

Projects (2)
Project
The goal of this project is to test hypotheses regarding plant and ecosystem function with respect to water, carbon, momentum and energy fluxes in the highly variable hydroclimate of semi-arid central Australia. This project encompasses studies of ecohydrology, plant ecophysiology, remote sensing and phenology, the ecosystem carbon cycle and meteorology. Our research focuses upon three widespread biomes across Australia: Mulga (Acacia spp) woodland/savanna, depending upon conditions; very open Bloodwood/Corkwood savanna (Corymbia opaca and Hakea spp., respectively) with a dominant understorey of the drought-tolerant C4 hummock grass Spinifex (Triodia spp.); and Redgum (Eucalyptus camaldulensis) riparian forest, which is groundwater dependent.
Project
This project is an attempt to partition carbon fluxes from a site with a strong source strength due to abiotic decomposition as a result of photo-degradation. Because abiotic decomposition does not respond to environmental conditions in the same way as heterotrophic or autotrophic respiration, traditional methods generate spurious GPP losses to the atmosphere. Thus, alternative methods like correlation analysis must be applied to the problem.