Pablo L. Peri

• PhD
• Instituto Nacional de Tecnología Agropecuaria

Partitioning the terrestrial carbon sink between vegetation and soil is crucial for predicting future climate change, but the role of soils remains poorly quantified. Here, we compiled 3,099 soil organic carbon time series spanning five decades. We found a global soil organic carbon sink of 1.83 plus or minus 0.9 (mean plus or minus SE) petagrams p...

Implementing precision fertilization to maximize crop yield while minimizing economic and environmental impacts has become critical for agriculture. Variability in biomass response to fertilization within fields, among regions, and over time creates simultaneous risks of under-yielding and overfertilization. We quantify factors determining fertiliz...

Ecosystems are experiencing changing global patterns of mean annual precipitation (MAP) and enrichment with multiple nutrients that potentially colimit plant biomass production. In grasslands, mean aboveground plant biomass is closely related to MAP, but how this relationship changes after enrichment with multiple nutrients remains unclear. We hypo...

Forbs (“wildflowers”) are important contributors to grassland biodiversity but are vulnerable to environmental changes. In a factorial experiment at 94 sites on 6 continents, we test the global generality of several broad predictions: (1) Forb cover and richness decline under nutrient enrichment, particularly nitrogen enrichment. (2) Forb cover and...

Grasslands cover approximately a third of the Earth’s land surface and account for about a third of terrestrial carbon storage. Yet, we lack strong predictive models of grassland plant biomass, the primary source of carbon in grasslands. This lack of predictive ability may arise from the assumption of linear relationships between plant biomass and...

Traditional approaches of forest classifications were based on tree species composition, but recently combine phe-nology and climate to characterise functional (cyclic and seasonal greenness) rather than structural or compositional components (phenoclusters). The objective was to compare the conservation value (capacity to support more native biodi...

Variable retention harvesting (VRH) was designed for timber purposes and biodiversity conservation in natural forests. This system was globally tested, but few studies are related to soil microbial components. The objective was to evaluate different retention types (aggregated and dispersed retention) considering different years-after-harvesting (6...

This work aimed to analyze and classify the suitability of freshwater sources for irrigation in three large hydrographic regions of Southern Continental Patagonia: Coyle, Serrano, and Gallegos. In these regions, there is a lack of information on the irrigation suitability of surface waters. For this, 74 surface water locations were sampled from 42...

La República Argentina sostiene su presencia en forma ininterrumpida en la Antártida desde 1904. Este logro requiere de un gran esfuerzo de orden logístico que incluye, entre otros aspectos, el abastecimiento de alimentos para el personal que habita y trabaja en las distintas bases del continente antártico. Es importante destacar que en las bases s...

Este documento resume los resultados y la metodología aplicada para producir los mapas de uso y cobertura del suelo (LULC) correspondientes al sector Agricultura, Silvicultura y Cambio de Uso de la Tierra (AFOLU, por sus siglas en inglés: Agriculture, Forestry, and Others Land Uses) de Argentina para los años 2000, 2010 y 2020. El objetivo de estos...

El cultivo del algarrobo en Argentina ha experimentado diferentes etapas a lo largo de los últimos 40 años. Sin embargo, es a partir de la sanción de la Ley de Inversiones para Bosques Cultivados (Ley Nacional No 25.080) en diciembre del año 1998 que se desencadenó un importante proceso vinculado a la forestación con algarrobo, principalmente en la...

The bidirectional relationship between plant species richness and community biomass is often variable and poorly resolved in natural grassland ecosystems1–3, impeding progress in predicting impacts of environmental changes. In contrast, most biological communities have lognormal species abundance distributions (e.g., biomass, cover, number of indiv...

Global change is associated with variable shifts in the annual production of aboveground plant biomass, suggesting localized sensitivities with unclear causal origins. Combining remotely sensed normalized difference vegetation index data since the 1980s with contemporary field data from 84 grasslands on 6 continents, we show a widening divergence i...

Nothofagus antarctica forest extends from 46 to 56° south latitude and its main use has been as silvopastoral systems (SPS). Several studies have characterized understory of N. antarctica SPS. However, other practices like pasture sowing, irrigation and fertilization, to improve understory yield, remains little documented. The aim of this work was...

El presente trabajo, busca conocer la respuesta de un bosque alto del Chaco Húmedo ante diferentes intervenciones silviculturales después de 19 años de efectuada la corta en términos de estructura, composición específica y sus variaciones. En una superficie de bosque de 5,4 hectáreas se combinaron dos métodos de corta (método de la masa, MM y métod...

Forbs (“wildflowers”) are important contributors to grassland biodiversity and services, but they are vulnerable to environmental changes that affect their coexistence with grasses. In a factorial experiment at 94 sites on 6 continents, we tested the global generality of several broad predictions arising from previous studies: (1) Forb cover and ri...

Background: Annual seed production is key to understand natural forest dynamics and to apply sustainable forest management. This process is subjected to variations according to annual and seasonal climatic conditions, locally affected by El Niño-Southern Oscillation (ENSO) and the Southern Annular Mode (SAM) seasonality. Recognising how these varia...

Silvopastoral systems (SPS) provide a range of ecosystem services, including carbon (C) sequestration. Well-managed SPS outperform grasslands, pastures, and forests in terms of C through increased soil and biomass storage. This becomes relevant for landscapes that continue to be intensely transformed for agriculture and livestock production. In thi...

Agroforestry landscapes provide a variety of ecosystem goods and services at both the farm and landscape levels. They also host thousands of rural people whose livelihoods depend on the forest. Forest sustainable management is needed for farmer’s development. This is complex because it implies the integration of biological and socio-productive dive...

Background: Forest harvesting is the main driver of change in forest structure and natural regeneration dynamics during management. Forest recovery after disturbances is important for economic values and ecological processes of natural forests. The aim of the study was to assess recovery paths of Nothofagus pumilio (Poepp. & Endl.) Krasser forests...

Modern forestry systems rely on typologies of forest types (FTs). In Argentina, several proposals have been developed, but they lack unified criteria. The objective was to compare different approaches, specifically focusing on (i) phenoclusters (functional forests based on vegetation phenology variations and climate variables) and (ii) forest canop...

An increase in the frequency and intensity of agricultural and ecological droughts is expected. This study aimed to assess the response of annual forage dry matter production (AFP) to drought in 22 sites across Argentina’s silvopastoral systems (SPS) in native forests and forest plantations and compare it to grasslands and treeless pastures. The AF...

Vegetation Type (VT) mapping using Optical Earth observation data is essential for the management and conservation of natural resources, as well as for the evaluation of the supply of provisioning ecosystem services (ESs), the maintenance of ecosystem functions, and the conservation of biodiversity in anthropized environments. The main objective of...

Background Forest ecosystems undergo significant transformations due to harvesting and climate fluctuations, emphasizing the critical role of seeding in natural regeneration and long-term structural preservation. Climate change further amplifies these dynamics, affecting phenology across species and regions. In Tierra del Fuego (Argentina), Nothofa...

The nationally determined contribution (NDC) presented by Argentina within the framework of the Paris Agreement is aligned with the decisions made in the context of the United Nations Framework Convention on Climate Change (UNFCCC) on the reduction of emissions derived from deforestation and forest degradation, as well as forest carbon conservation...

La provincia de Santa Cruz presenta un mosaico complejo de paisajes y tipos de uso de suelo, que van desde superficies ocupadas con producción ganadera (ovina, bovina y mixta) hasta establecimientos sin producción ganadera, superficies desocupadas y áreas naturales protegidas (San Martino et al., 2022). Consecuentemente, las heterogeneidades en tér...

Forest plantations (through afforestation or reforestation) have been proposed as a valuable option to mitigate carbon (C) emissions. However, high spatiotemporal variation has been observed in soil organic carbon (SOC) pools associated to these systems. It has been proposed that SOC stock (Mg/ha) changes under forest plantations (ΔSOC) are related...

Soil nitrogen (SN) and soil phosphorus (SP) contents support several ecosystem services and define the forest type distribution at local scale in Southern Patagonia. The quantification of nutrients during forest surveys requires soil samplings and estimations that are costly and difficult to measure. For this, predictive models of soil nutrients ar...

Acceso al mapa: https://intamapacosargentina.users.earthengine.app/view/cos

Pablo L. Peri, Juan Gaitán, J., Matías Mastrangelo, Marcelo Nosetto, Pablo E. Villagra, Ezequiel Balducci, Martín Pinazo, Roxana P. Eclesia, Alejandra Von Wallis, Sebastián Villarino, Marina Gonzalez Polo, Silvina Manrique, Pablo A. Meglioli, Marie C. Aravena, Leonardo Tenti, Martín Mónaco, Jimena E. Chaves, Ariel Medina, Ignacio Gasparri, María P....

El cálculo de la HC de un producto comprende todas las actividades o eslabones de un proceso que conforman el ciclo de vida de ese producto, desde las materias primas utilizadas hasta el desecho final como residuo. El cálculo de la HC es uno de los primeros pasos hacia el compromiso y responsabilidad ambiental de las empresas u organizaciones. La H...

Este trabajo tiene por objetivo ajustar una función predictora regional del volumen total de palo santo (Gonopterodendron sarmientoi) por unidad de superficie para tres tipos de bosques con presencia de palo santo, usando como variables regresoras el área basal, la densidad y la altura dominante de palo santo

The general objective of this study was to provide information regarding the productivity and site quality of Palo Santo forests in their Argentinean distribution area in order to establish guidelines for sustainable management and use. We used data taken from 482 plots as part of national, regional and local forest inventories in northern Argent...

Increasing CO2 air concentration may affect wettability, anatomy and ultra-structure of leaves of Patagonian forest species, evergreen and deciduous plants potentially responding differently to such CO2 increases. In this study, we analysed the wettability, anatomy and ultra-structure of leaves of Nothofagus antarctica (deciduous) and N. betuloides...

Soil microorganisms contribute to soil carbon storage, soil respiration and nutrient cycling. In south Patagonia, there are scarce studies on carbon (C) and nitrogen (N) in soil microbial biomass (MB). The aim of this work was to evaluate C and N content in soil MB, and soil microbial respiration according to different sites and forest uses: Nothof...

Los Bosques Andino Patagónicos proveen una amplia gama de servicios ecosistémicos que incluyen servicios de provisión, regulación, soporte y culturales. Estos bosques han sido utili - zados por los habitantes originales de la Patagonia, pero con la llegada de nuevos pobladores a la región a finales del siglo XIX su utilización fue creciendo con el...

Para que un sistema productivo sea considerado sustentable, este debe ser factible de satisfacer sus necesidades actuales, sin comprometer la posibilidad de satisfacer las necesidades de las generaciones futuras. En la actualidad, existen distintos tipos de herramientas que se pueden implementar a fin de poder determinar si un sistema es sustentabl...

Peri, P et al (2022). Informe Técnico Final. Carbono almacenado en suelos en los bosques nativos de diferentes ecorregiones del país. http://hdl.handle.net/20.500.12123/14594

One of the most fundamental questions in ecology is how many species inhabit the Earth. However, due to massive logistical and financial challenges and taxonomic difficulties connected to the species concept definition, the global numbers of species, including those of important and well-studied life forms such as trees, still remain largely unknow...

Watershed definition is fundamental for integrated management of water resources, considering the social, productive and environmental demands. The watershed spatial delimitation is essential to understand eco-hydrological processes in the territory and management. The objective of this work was to delineate and code the hydrographic regions of Sou...

Forests structure of palo santo (Gonopterodendron sarmientoi): Regional assessment for forest management and conservation in Argentine. Gonopterodendron sarmientoi is a threatened native tree of the Dry Chaco region in South America, adapted to semiarid conditions. However, the relationships among climatic and edaphic conditions and its forest stru...

Conocer cómo es la biología de estos suelos en cuanto a carbono (C) y nitrógeno (N) en los microorganismos da idea de la descomposición de la materia orgánica y por ende del ciclado de los nutrientes y puede servir de base para el entendimiento del funcionamiento de los sistemas naturales. El objetivo del presente trabajo es evaluar el contenido de...

Evaluación de los microorganismos del suelo en un pastizal de la Estepa Magallánica Seca ante cambios en nutrientes y régimen hídrico Gagaglione V., Toledo S., Gonzalez Polo M., Birgi J., Peri P. Introducción En los ecosistemas terrestres, la descomposición de la materia orgánica es un importante proceso en el ciclo de carbono (C) mediado por micro...

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Nutrient resorption is crucial for mineral element conservation and efficiency of forest species, but knowledge on its significance and the mechanisms involved is still limited for most species and habitats. Focusing on the harsh conditions for plant growth and survival of southern Patagonia, a field study for comparing the rate of foliar resorptio...

In Southern Patagonia, a long-term monitoring network has been established to assess bio-indicators as an early warning of environmental changes due to climate change and human activities. Soil organic carbon (SOC) content in rangelands provides a range of important ecosystem services and supports the capacity of the land to sustain plant and anima...

Los bosques de lenga (Nothofagus pumilio) constituyen la masa forestal de mayor importancia económica en superficie y volumen del sur de Argentina y Chile, con una amplia distribución latitudinal desde Neuquén (35º 35' S) hasta Tierra del Fuego (55º S). La lenga es una especie decidua, que ocupa generalmente el límite altitudinal de la vegetación a...

La forestación y parquización de espacios verdes en una ciudad anclada en la estepa Patagónica tiene por finalidad principal la de mejorar la calidad de vida de sus habitantes. También la finalidad de la forestación en la Patagonia comprende la instalación de cortinas cortaviento, la plantación en macizos y el arbolado urbano. Es decir, funciones q...

Fine fruits as raspberry and gooseberries represent the second production with the largest area cultivated in Santa Cruz province (Argentina), and this activity is usually carried out by family farmers in outdoor conditions. The availability of information about productive, morphologic, phenological and quality aspects of these crops in south Patag...

Nothofagus antarctica, is the most important species of the silvopastoral systems of southern Patagonia. However, there is limited information on the ecophysiological response mechanisms of seedlings for survival under different resource availability regimes, and whether such processes may differ between provenances. In this study, we evaluated the...

Defining the optimal placement of areas for biodiversity conservation in developing nations remains a significant challenge. Our best methods for spatially targeting potential locations for biodiversity conservation rely heavily on extensive georeferenced species observation data which is often incomplete or lacking in developing nations. One possi...

Soils hold the largest pool of organic carbon (C) on Earth; yet, soil organic carbon (SOC) reservoirs are not well represented in climate change mitigation strategies because our database for ecosystems where human impacts are minimal is still fragmentary. Here, we provide a tool for generating a global baseline of SOC stocks. We used partial least...

The conversion of native vegetation to tree plantation (afforestation) implies a drastic change in life forms and as a consequence, changes in the microenvironmental conditions, and the quantity and quality of organic matter entering the soil. This could affect soil microbial communities and the processes catalyzed by them. In Patagonia, afforestat...

Variable retention is an alternative harvesting system that could be implemented instead the more traditional ones (e.g. shelterwood cut for N. pumilio forests in southern Patagonia), because it was designed not only for timber purpose, but also for conservation. However, the impact of different retention types on diversity is not clear, e.g. steno...

Human societies depend on an Earth system that operates within a constrained range of nutrient availability, yet the recent trajectory of terrestrial nitrogen (N) availability is uncertain. Examining patterns of foliar N concentrations and isotope ratios (δ15N) from more than 43,000 samples acquired over 37 years, here we show that foliar N concent...

Decomposition of fine roots is a fundamental ecosystem process that relates to carbon (C) and nutrient cycling in terrestrial ecosystems. However, this important ecosystem process has been hardly studied in Patagonian ecosystems. The aim of this work was to study root decomposition and nutrient release from fine roots of grasses and trees (Nothofag...

Las producciones de fruta fina son el segundo cultivo con mayor superficie implantada en Santa Cruz y constituyen una alternativa atractiva por su alto valor económico y las posibilidades de valor agregado que brindan. Actualmente no existen trabajos que evalúen el rendimiento de las principales especies tanto al aire libre como bajo cubierta, por...

Fire is an important disturbance affecting Nothofagus pumilio (lenga) forests in Chubut and Santa Cruz provinces of Patagonia, Argentina. Depending on the forest structure and the level of fire severity, the resulting stands could substantially differ from the original. In this study, we evaluated post-fire effects on soil and vegetation conditions...

El fuego es un disturbio importante en bosques de lenga de Chubut y Santa Cruz, en la Patagonia argentina. Según del tipo de bosque y la severidad del fuego, el sistema resultante puede diferir en gran medida respecto del original. En este trabajo se evaluaron condiciones post-fuego (vegetación y suelo) que afectarían el restablecimiento de Nothofa...

Key message: Soil texture and temperature-related variables were the variables that most contributed toNothofagus antarcticaforest height in southern Patagonia. This information may be useful for improving forest management, for instance related to the establishment of silvopastoral systems or selection of suitable sites for forest reforestation in...

Aim of the study: To analyse the effectiveness of thinning on tree growth, forest structure and microclimatic variables along seven years after cuttings in a secondary Nothofagus antarctica forest in Southern Patagonia. Area of study: Five hectares of homogeneous stand of secondary forests (54º15’46” SL, 66º59’41” WL) in Tierra del Fuego, Argentin...

This second edition of the book contains 12 chapters, which aims to: (1) to update existing chapters with the tremendous advances in temperate agroforestry knowledge that have come to light in the last 20 years; and (2) if possible, to add new global regional examples of temperate agroforestry. Several changes have been made to the second edition....

The extensive bovine systems of Tierra del Fuego incorporate little management technology so they have low production levels per unit area. However, there are technologies available such as grassland assessment, vegetation type separation, and rotational grazing system that would allow better grazing management. In the present study, a management p...

Silvopastoral systems (SPS) provide a wide range of non-provisioning ecosystem services including carbon (C) sequestration. Well-managed SPS outperform both grasslands/pastures and forests in terms of C by increasing soil and biomass C storage. In this Chapter, C sequestration information from native forests and tree plantations under silvopastoral...

Resumen Los sistemas bovinos extensivos de Tierra del Fuego incorporan escasa tecnología de manejo por lo que poseen bajos niveles de producción por unidad de superficie. No obstante, hoy existen tecnologías disponibles como la evaluación de pastizales, la separación de ambientes y el pastoreo rotativo que permitirían un mejor manejo del pastoreo....

Mast seeding is characteristic of many long-lived tree species and widely proposed as a mechanism to reduce seed predation. However, whether the efficiency of this reproductive response may vary depending on type of seed predator (e.g., invertebrates vs. vertebrates) or depending on local characteristics, remains seldom explored. We evaluated for 8...

Nutrient resorption understood as the“migration” of nutrients from leaves prior to abscission towards other tissues or for storage has been suggested to be a key component of nutrient conservation in deciduous forests pecies. Native forests in southern Argentinean Patagonia cover approximately 1.2 million ha, corresponding more than 95% of these fo...

Introduction: Huemul (Hippocamelus bisulcus Molina) is the most threatened flag species of Southern Patagonia, where conservation efforts were not effective to avoid the retraction of its distribution area. Habitat quality modeling can assist to design better management strategies for regional conservation planning. The objective was to elaborate o...

The ñire forests (Nothofagus antarctica) occupy approximately 190 mil ha in Tierra del Fuego, and have been used since colo-nization for firewood and pole extraction, as well as livestock protection and foraging. As a consequence of extensive and without planning use, these currently present a great variety of forest structures, re-generation degre...

Agroforestry systems (AS) has achieved significant development in South America during the last decades. Here, we evaluated how different socio-political factors (e.g., source of funding, institutional priorities and international cooperation) influence the production of scientific research regarding AS. We performed a literature review by assessin...

In Southern Patagonia, most of the land ranging from the mountains to the sea in contrasting environmental conditions is devoted to extensive sheep farming. Existing estimations indicate that in ecosystems under livestock use, around 85% of the nitrogen (N) returning to the soil is through animal feces and urine. However, there is a lack of informa...

In Santa Cruz province, nearly 2.83 million hectares are occupied by a shrub steppe dominated by Mulguraea tridens (locally called matorral de mata negra), where the main activity is extensive sheep farming. This paper focuses on the effects of management practices such as removal in strips of the above ground shrub layer. The treatments were the c...

El huemul (Hippocamelus bisulcus) es un cérvido endémico de Argentina y Chile, presentando un estado vulnerable de conservación, llegando en muchas áreas a un peligro de extinción. Los mapas de hábitat son una útil herramienta para la determinación de los requerimientos ecosistémicos de las especies, y para la toma de decisiones en manejo y conserv...

Southern Patagonia’s landscape hosts several semi-natural habitats, traditionally used for sheep production, such as Mulguraea tridens and Lepidophyllum cupressiforme scrublands. Mulguraea scrublands are managed via mechanical shredding to remove shrubs and increase grass availability, alternating with structural-retention strips. We analyzed the i...