Pablo Luis Peri

• PhD
• Senior Researcher at Universidad Nacional de la Patagonia Austral-INTA-CONICET

Plant biomass tends to increase under nutrient addition and decrease under drought. Biotic and abiotic factors influence responses to both, making the combined impact of nutrient addition and drought difficult to predict. Using a globally distributed network of manipulative field experiments, we assessed grassland aboveground biomass response to bo...

Polyphenol variability Nothofagus antarctica population growing in different environmental conditions

Las sequías son un fenómeno de escala regional que afecta la seguridad alimentaria, la provisión de agua y energía, cuya severidad, duración y frecuencia se espera aumenten en un contexto de cambio climático. En el presente trabajo se estudió la tendencia en la precipitación anual y estacional en la provincia de Santa Cruz; la ocurrencia de sequías...

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...

Nutrient enrichment impacts grassland plant diversity such as species richness, functional trait composition and diversity, but whether and how these changes affect ecosystem stability in the face of increasing climate extremes remains largely unknown. We quantified the direct and diversity‐mediated effects of nutrient addition (by nitrogen, phosph...

Remote sensing and landscape modelling improve forest classification. One approach combines variables based on forest phenology and climate to characterisefunctional rather than structural or compositional characteristics of ecosystems (phenoclusters). However, there are few studies about the correlation between these new modelling approaches and f...

Entre los años 2022 y 2023 se inició la producción de vegetales en módulos de hidroponia instalados en las Bases Antárticas Conjuntas argentinas Marambio y Esperanza, cuyo objetivo principal es el abastecimiento continuo de alimento fresco para su personal. En este sentido, para el consumo humano y para la producción hidropónica se requiere de un c...

Silvopastoral systems (SPS) are suggested to promote a balance between productive alternatives and ecological values. The aim of this study was to determine the changes generated by SPS (thinning + livestock) in Nothofagus antarctica (ñire) forests compared to other productive environments (unmanaged forests, dry grasslands, wet grasslands). A tota...

Modern forestry systems are based upon typologies of forest types (FT). Many proposals were developed in Argentina, but without following unified criteria. The objective was to compare different approaches based on (i) functional forests (phenoclusters), and (ii) forest canopy-cover composition by tree species. We employed data of National Forest I...

Forest management aims to preserve integrity and ecosystem resilience. Conservation and species invasion patterns must be determined in managed landscapes. The objectives of this study were to identify proxies that allowed plant species invasion (natives and exotics) and define thresholds of human impacts to improve management. We also wanted to id...

Nothofaus antarctica forest extends from 46 to 56º SL been used as silvopastoral systems (SSP). Several studies have characterized understory of N. antarctica SSP. However, other practices like pasture sawn, irrigation and fertilization, to improve understory yield, remains undocumented. The aim of this work was to compare dry matter (DM) productio...

Silvopastoral systems (SPS) are proposed as one option that promotes a balance between productive alternatives and ecological values. The objective was to determine the changes generated by SPS (thinning + livestock) in Nothofagus antarctica (ñire) forests compared to other productive environments (unmanaged forests, dry grasslands, wet grasslands)...

Forest management aims to preserve ecosystem integrity, maintaining resilience thresholds. For this, conservation and invasion patterns must be determined in managed landscapes. The objective was to identify proxies (landscape and environmental patterns) that allowed the plant species invasion and define thresholds of human impacts to improve manag...

Most of the native forests in Argentina are used for livestock production with little sustainable silvopastoral management. Our objective here is to discuss different management strategies where natural and human capital are combined to co-produce ecosystem services (ES) provided by silvopastoral systems in native forests, interacting with differen...

Global change drivers such as anthropogenic nutrient inputs simultaneously alter biodiversity, species composition, and ecosystem functions such as aboveground biomass. These changes are interconnected by complex feedbacks among extinction, colonization, and shifting relative abundance. Here, we use a novel temporal application of the Price equatio...

Global change drivers such as anthropogenic nutrient inputs simultaneously alter biodiversity, species composition, and ecosystem functions such as above ground biomass. These changes are interconnected by complex feedbacks among extinction, invasion, and shifting relative abundance. Here, we use a novel temporal application of the Price equation t...

El cambio climático y las variaciones en el clima son un factor de gran incidencia sobre el desarrollo de los diferentes ecosistemas a lo largo del tiempo, donde las tendencias del cambio climático indican un aumento en la temperatura y cambios sustanciales en los patrones de precipitación, así como importantes variaciones en el corto plazo en el c...

Dominant and non-dominant plants could be subject to different biotic and abiotic influences, partially because dominant plants modify the environment where non-dominant plants grow, causing an interaction asymmetry. Among other possibilities, if dominant plants compete strongly, they should deplete most resources forcing non-dominant plants into a...

Low intensity silviculture has been used to decrease the impact of forest harvesting, for example, on bird species and structural diversity. The objective of this work was to analyse the long-term effect of thinning on bird communities of Nothofagus antarctica forests in Tierra del Fuego (Argentina), compared with unthinned forests at two different...

Usually, stands with aging trees are considered forests with higher conservation values, regardless their structural diversity and other functional attributes. Natural stands present a wide range of age structures, from even-aged stands growing at different development growth phases (e.g. CO = stands at initial or final optimum development growth p...

Soil microorganisms communities regulate key functions in terrestrial ecosystems and contributes to the formation of stable organic matter and hence climate change mitigation. The structure, diversity and activity of soil microbial communities are influenced by the quantity and quality of organic compounds entering soils through the contribution of...

Soil is the most important terrestrial carbon (C) reservoir but is greatly impacted by land use change (LUC). Previous analyses of LUC impacts on soil C have focused on biophysical variables, leaving aside the influence of socioeconomics. The aim of our study was to determine global soil organic carbon (SOC) change patterns after LUC and to assess...

Microbial processing of aggregate‐unprotected organic matter inputs is key for soil fertility, long‐term ecosystem carbon and nutrient sequestration and sustainable agriculture. We investigated the effects of adding multiple nutrients (nitrogen, phosphorus and potassium plus nine essential macro‐ and micro‐nutrients) on decomposition and biochemica...

Natural steppe grasslands are the principal food resource for sheep in the Patagonia region, reared for meat and wool. However, there is currently a concern about the relationship between ruminant livestock and climate change due to its contribution to anthropogenic greenhouse gas (GHG) emissions. The objective of this study was to determine the ca...

Aim Nutrient enrichment is associated with plant invasions and biodiversity loss. Functional trait advantages may predict the ascendancy of invasive plants following nutrient enrichment but this is rarely tested. Here, we investigate (a) whether dominant native and non‐native plants differ in important morphological and physiological leaf traits, (...

Grasslands are subject to considerable alteration due to human activities globally, including widespread changes in populations and composition of large mammalian herbivores and elevated supply of nutrients. Grassland soils remain important reservoirs of carbon (C) and nitrogen (N). Herbivores may affect both C and N pools and these changes likely...

One reason for the decline of natural forest is that many ecosystem services (ESs) are usually not priced and values were only considered provisioning services. Argentina enacted the National Law 26,331/07, which regulates protection, enrichment, restoration and management of native forests and its environmental services. The objective is to determ...

Different methodologies had been developed for species management and conservation based on modelling of potential biodiversity at regional scales. However, most of these models were fitted for umbrella species (e.g. big mammals) rather than micro-fauna. Beetles should be included to improve conservation strategies due to their functional roles and...

https://www.acemap.info/paper/278415444. https://www.semanticscholar.org/paper/Data-Portal-Query-on-Data-references-in-CSV-format%2C-Day-Kumar/a1ec6d8d87a79c2a7c32e58bae6737d5954333f1 Keywords: Information retrieval; Computer science; data portal

https://www.acemap.info/paper/35892092 https://www.semanticscholar.org/paper/Data-Portal-Query-on-Description-of-data-extract-1-Day-Kumar/6233458f652c7aeb221048bb5ff48392f2d685fc

Nothofagus pumilio forests in Tierra del Fuego are the southernmost forests in the world, where extreme climate conditions represent a challenge to attain sustainable forest management. Retention forestry was proposed as an alternative to increase the species conservation in managed stands. Here, we synthetized results related to the implementation...

Background Variable retention (aggregated and dispersed retention) harvesting proposed for Nothofagus pumilio was designed for timber purposes and biodiversity conservation. Harvesting by opening canopy generates different microenvironments and creates contrasting conditions for seedling establishment, growth, and eco-physiology performance due to...

La producción ganadera extensiva en la Patagonia Sur se realiza sobre cuadros de pastoreo de gran superficie, escasa receptividad animal y fragilidad ambiental elevada. El manejo histórico del pastoreo, desde fines del siglo XIX, causó la desertificación del paisaje en gran parte del territorio. Diferentes esfuerzos institucionales buscaron mejorar...

The role of understory plants in native forests is critical for ecosystem function, wildlife protection and ecosystem productivity. The interest to estimate biodiversity increased during the last decades at landscape level. The objective was to elaborate a map of potential biodiversity (MPB) of understory species of Nothofagus forest using potentia...

The role of understory plants in native forests are critical for ecosystem function, wildlife protection and ecosystem productivity. The interest to estimate biodiversity increased during the last decades at landscape level. The objective was to elaborate a map of potential biodiversity (MPB) of understory species of Nothofagus forest using potenti...

Soil total nitrogen (N) stock in rangelands, shrublands, and forests support key ecological functions such as the capacity of the land to sustain plant and animal productivity and ecosystem services. The objective of this study was to model soil total N stocks and soil C/N ratio from 0–30 cm depth across the region using freely accessible informati...

La historia de los bosques de Nothofagus antarctica (ñire, ñirre) de Santa Cruz está asociada a profundos disturbios geológicos y climáticos. A estos se le suman los disturbios antrópicos más recientes que debido a los usos de la tierra contribuyen a la fragmentación del hábitat. En este trabajo se comparó la diversidad de plantas vasculares en bos...

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...

Soil stores approximately twice as much carbon as the atmosphere and fluctuations in the size of the soil carbon pool directly influence climate conditions. We used the Nutrient Network global change experiment to examine how anthropogenic nutrient enrichment might influence grassland soil carbon storage at a global scale. In isolation, enrichment...

Leaf traits are frequently measured in ecology to provide a ‘common currency’ for predicting how anthropogenic pressures impact ecosystem function. Here, we test whether leaf traits consistently respond to experimental treatments across 27 globally distributed grassland sites across 4 continents. We find that specific leaf area (leaf area per unit...

The history of Nothofagus antarctica forests in Santa Cruz is associated with significant geological and climatic disturbances. More recently, anthropic disturbances contributed to habitat fragmentation process. In the forest-steppe ecotone N. antarctica forms small forests inserted in a steppe matrix and separated from the Andean forests that are...

Los bosques de ñire (Nothofagus antarctica) en el sur de Patagonia se ubican mayoritariamente limitando con la estepa. De esta manera, han sido utilizados como sistemas silvopastoriles con ganadería ovina y/o bovina desde fines de 1800. Esta actividad que combina tres componentes principales (árboles, sotobosque y animales) en una misma unidad de s...

Las aves son consideradas buenos indicadores de cambio ecológico. El uso ganadero y las propuestas silvopastoriles en bosques de Nothofagus antarctica (ñire) en Tierra del Fuego, implican la apertura de su dosel, provocando cambios en su avifauna que no han sido detalladamente estudiados aún. En este trabajo se analizaron diferencias en la estructu...

Abstract 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 forests. The aim of this work was to study root decomposition and nutrient release from fine roots of ñire (Nothofagus anta...

Environmental change can result in substantial shifts in community composition. The associated immigration and extinction events are likely constrained by the spatial distribution of species. Still, studies on environmental change typically quantify biotic responses at single spatial (time series within a single plot) or temporal (spatial beta dive...

This study evaluated the seed production and quality and the subsequent regeneration establishment in five pure Nothofagus antarctica forests growing at different site qualities and crown cover during 10 years, in Southern Patagonia (Argentina). Four traps of 1 m2 were installed in each stand and sampled monthly (between February and May) each year...

The distribution of biodiversity at the landscape level is shaped by biotic, abiotic and anthropogenic factors. Biodiversity maps provide the basis for defining management and conservation strategies that can minimize human impacts. The objective was to elaborate a map of potential biodiversity of lizards based on habitat suitability maps of indivi...

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...

The ecosystem service (ES) concept is becoming mainstream in policy and planning, but operational influence on practice is seldom reported. Here, we report the practitioners' perspectives on the practical implementation of the ES concept in 27 case studies. A standardised anonymous survey (n=246), was used, focusing on the science-practice interact...

Through litter decomposition enormous amount of carbon is emitted to the atmosphere. Numerous large-scale decomposition experiments have been conducted focusing on this fundamental soil process in order to understand the controls on the terrestrial carbon transfer to the atmosphere. However, previous studies were mostly based on site-specific litte...

In recent decades agroforestry has undergone significant development in Latin America. South America generates the most scientific research on the topic in the region. We conducted a comprehensive review and analysis of knowledge production for South American agroforestry that includes livestock grazing, known as agrosilvopastoralism (AS), examinin...

Through litter decomposition enormous amounts of carbon is emitted to the atmosphere. Numerous large-scale decomposition experiments have been conducted focusing on this fundamental soil process in order to under-stand the controls on the terrestrial carbon transfer to the atmosphere. However, previous studies were mostly based on site-specific litt...

The sustainable management of agroforestry landscapes is complex because they are socio-ecosystems that integrate biological and socio-productive diversity with spatial-temporal dynamical interactions. Furthermore, agroforestry landscapes provide a variety of ecosystem goods and services at both the farm and global levels, and host thousands of rur...

Nothofagus pumilio is the most important timber native species of south Patagonia in Argentina and Chile. Total volume stock and timber production change according to site quality, occupation degree, growth development phases and management history of the stands. The aim of this work was to evaluate the yield of three different logging systems (sho...

Spatial planning has to deal with trade-offs between various stakeholders’ wishes and needs as part of planning and management of landscapes, natural resources and/or biodiversity. To make ecosystem services (ES) trade-off research more relevant for spatial planning, we propose an analytical framework, which puts stakeholders, their land-use/manage...

To propose new silvicultural practices, it is necessary to understand the involved ecosystem processes and the impact that produce. The proposed practices generated several questions related to remnant tree stability, the seedling bank, seed production, regeneration dynamic, and the influence of biotic and abiotic damages. The objective was to dete...

Desarrollamos un modelo de estados y transiciones (MEyT) para el bosque de ñire (Nothofagus antarctica) en el norte de la Patagonia, con el fin de sintetizar el conocimiento disperso sobre las repuestas de este sistema al manejo silvopastoril. En base a una recopilación bibliográfica, a un taller de expertos seguido por sesiones de consulta y a rel...

Reductions in community evenness can lead to local extinctions as dominant species exclude subordinate species; however, herbivores can prevent competitive exclusion by consuming otherwise dominant plant species, thus increasing evenness. While these predictions logically result from chronic, gradual reductions in evenness, rapid, temporary pulses...

The sustainable use of ñire forests requires knowledge of its dynamics and management to maintain long-term main forest ecosystem services. The aim of this work was to develop a structural–functional state and transition model for ñire forests in southern Patagonia. For this, provincial inventory information was analyzed together with information f...

The sustainable use of ñire forests requires knowledge of its dynamics and management to maintain long-term main forest ecosystem services. The aim of this work was to develop a structural–functional state and transition model for ñire forests in southern Patagonia. For this, provincial inventory information was analyzed together with information f...

The PREDICTS project—Projecting Responses of Ecological Diversity In Changing Terrestrial Systems (www.predicts.org.uk)—has collated from published studies a large, reasonably representative database of comparable samples of biodiversity from multiple sites that differ in the nature or intensity of human impacts relating to land use. We have used t...

Figure S1: Database schema. Diversity data in yellow, GIS data in green and Catalogue of Life data in blue. The diversity tables datasource, study, site, measuredtaxon and diversitymeasurement follow the structure described in ‘Methods’ in the main text and in Hudson et al. (2014): a datasource is associated with one or more study records, each of...

The PREDICTS project—Projecting Responses of Ecological Diversity In Changing Terrestrial Systems (www.predicts.org.uk)—has collated from published studies a large, reasonably representative database of comparable samples of biodiversity from multiple sites that differ in the nature or intensity of human impacts relating to land use. We have used t...

The PREDICTS project—Projecting Responses of Ecological Diversity In Changing Terrestrial Systems (www.predicts.org.uk)—has collated from published studies a large, reasonably representative database of comparable samples of biodiversity from multiple sites that differ in the nature or intensity of human impacts relating to land use. We have used t...

We built a state-and-transition model (S&TM) for the ñire forest system under silvopastoral use in north-western Patagonia, with the aim to identify management effects on the vegetation. The model can help design practices that maintain the system within ‘desired’ conditions in the long term. Based on a review of published and unpublished literatur...

The establishment of silvopastoral systems (SSP) in poplar (Populus deltoides ‘Australiano 106/60’) plantations requires specific management strategies. In this context, the combination of the type of tree multiplication material and its palatability may determine the success of SSP establishment. We proposed to create a new technology for the esta...

Several studies confirm that biodiversity loss endangers ecosystem services (ES) supply and human well-being. A better understanding of biodiversity–ES relationships and effects of biodiversity loss on ES supply is needed. The objective was to determine relationships between potential biodiversity and three ES in Patagonia where cattle ranching und...

Respuesta de la vegetación al manejo por corte en fajas en un arbustal de Mulguraea tridens en Patagonia sur RESUMEN. En Santa Cruz, aproximadamente 2.83 millones de hectáreas conforman el matorral de mata negra, una estepa arbustiva dominada por el arbusto Mulguraea tridens, donde la ganadería ovina extensiva es la principal actividad productiva....

Silvopastoral systems in Nothofagus antarctica (ñire) forest have become an economical, ecological and productive alternative in Patagonia. Southern Patagonia’s experience over the past 12 years with silvopastoral systems is reviewed. The productivity and nutritive value (crude protein content and dry matter digestibility) of the understorey grassl...

We used Moderate Resolution Imaging Spectroradiometer (MODIS) annual/30-arcsec NPP (MOD17) across 14-year dataset to calculate average productivity of each level (I). In this study, two analyses were performed (II): (a) forest regions (FR), and (b) conservation categories of Territorial Planning of Native Forests (TPNF) made by provincial governmen...

We used disturbance intensity values (low, medium and high) of several drivers of forest change (DFC) to build a comprehensive classification diagram of possible scenarios. This diagram groups sets of S&TM that include ñire forests’ natural development phases (regeneration, initial and final optimal growth, and break down). Then, to define priority...

El objetivo de este trabajo fue medir la variación temporal y espacial de la humedad del suelo y la densidad de raíces finas herbáceas y arbóreas en bosques de Nothofagus antarctica bajo uso silvopastoril. Durante cuatro años se midió estacionalmente la humedad volumétrica de suelo (HVS) en los primeros 20 cm en tres niveles de coberturas de copa (...

El uso actual de los sistemas silvopastoriles en bosques de Nothofagus antarctica (ñire) de Tierra del Fuego requiere de un manejo adaptativo para la conservación de la biodiversidad y provisión de servicios ecosistémicos en el largo plazo. Los modelos de estados y transición (ME&T) proveen una herramienta simple de describir la dinámica de la vege...

La productividad primaria neta (PPN) terrestre cuantifica la cantidad de energía solar convertida en biomasa (mediante la fotosíntesis) por unidad de tiempo y espacio. Es una variable clave para comprender múltiples procesos ecosistémicos y el intercambio de carbono entre la biota y la atmósfera. El objetivo de este trabajo fue analizar la dinámica...

Stocking rate adjustment is a key aspect in extensive grazing management. In Santa Cruz, Argentina, sheep carrying capacity is estimated through a fixed forage allowance (FFA) regardless of paddock use. In this work, we developed a variable stocking rate allocation model (VSRAM) based on the simulation of forage biomass and quality dynamics and the...

Global biodiversity and productivity The relationship between biodiversity and ecosystem productivity has been explored in detail in herbaceous vegetation, but patterns in forests are far less well understood. Liang et al. have amassed a global forest data set from >770,000 sample plots in 44 countries. A positive and consistent relationship can be...