María Vanessa Lencinas - Academia.edu (original) (raw)

Papers by María Vanessa Lencinas

Ecosistemas: Revista científica y técnica de ecología y medio ambiente, Oct 15, 2018

Natural and social sciences of Patagonia, 2021

Land use planning is mainly based on monetary values of provisioning ecosystem services (ES). How... more Land use planning is mainly based on monetary values of provisioning ecosystem services (ES). However, many other non-monetary ES and biodiversity provide values for human well-being, and it should be included in the decision-making. The objective of this chapter was to characterize different ES (provisioning, cultural, supporting, regulating) and potential biodiversity in different forest types in Tierra del Fuego Province, Argentina. We map and extract information for provision of ES and biodiversity and compare them through univariate and multivariate methods. We found that each forest type showed different potential biodiversity that determines the need of specific conservation and management strategies. Forest types presented different types and levels of provision of the studied ES, where several synergies and trade-offs were observed according to the current economic activities. Beside this, ES and potential biodiversity of the forests are not equally represented in the currently protected natural reserve network, compared to the values at landscape level. These outputs can be used to improve the current land use planning and the effectiveness of conservation at landscape level.

Regional Environmental Change, Mar 18, 2022

The influence of the ancient landscape configuration and the land use legacies on forest cover ch... more The influence of the ancient landscape configuration and the land use legacies on forest cover change has been thoroughly investigated in temperate and tropical forests while it remains barely explored at high-latitudinal regions. This study explores the landscape drivers leading forest cover changes and their influence on current forest attributes in the world’s southernmost forests (Argentina). Nothofagus antarctica forest cover changes were determined by combining multitemporal photo-interpretation of aerial photographs (1961) and satellite images (2016–2019). We analyzed changes in land covers and landscape diversity indexes. We also explored the potential relationships among descriptors of forest structure, soil or understory characteristics, and the magnitude of forest increase. Forest cover increased in 55 sites (72% of study area), and decreased in 21 sites (28% of study area). Cleared forests and forest edges decreased by half from past to the present, while woody encroachment increased. This resulted in a diversification of the current landscape by an increase in the number of land cover categories and Shannon–Wiener index. The increase in forest cover was positively influenced by land cover diversity and latitude, i.e., major increases at southern latitudes. Forests with greater recovery presented more similar understory attributes than those with lower recovery, while in other forest structures and soil properties, different magnitudes of recovery occurred. Sites with a high proportion of forest recovery evidence a reduction of past land use legacies (e.g., forage plant species introduced for livestock) at a local scale. These results expand our knowledge about the current natural dynamic of high-latitude forests, although the precise anthropic pressure changes (e.g., livestock density) leading to this process are still unclear and should be further investigated. Management practices should consider these spatial differences in the response to recovery of sub-Antarctic forests, such as the management of densely regenerated areas by thinning, or the restoration of degraded forests, as well as the monitoring of woody encroachment in natural grasslands and peatlands. Although we document an overall gain in N. antarctica forests, the results could vary when incorporating other forest types (N. pumilio, N. betuloides) and geographic zones (e.g., Andean mountains), due to the complex dynamics of these coupled human-natural systems.

Forest Ecology and Management, Feb 1, 2023

Journal of Environmental Management, Apr 1, 2022

In the last years, different spatial analyses were developed to support multi-taxon biodiversity ... more In the last years, different spatial analyses were developed to support multi-taxon biodiversity conservation strategies. In fact, the use of species distribution models as input allowed to create spatial decision-support maps. Of special interest are maps of potential biodiversity (MPB), which define distribution and ecological requirements of relevant species and maps of priority conservation areas (MPCA), which define priority areas considering endemism and richness. The objective of this paper was to assess multi-taxon biodiversity based on two different spatial analyses and to test their efficiency to support conservation decision at Patagonia. We computed 119 potential habitat suitability maps (one deer, birds, lizards, darkling-beetles, plants) with ENFA (Environmental Niche Factor Analysis) and 15 environmental variables, using Biomapper software. ENFA calculate two ecological indexes (marginality and specialization) which describe the narrowness of species niches and how extreme are the optimum environmental conditions related to the whole study area. These maps were combined obtaining a MPB and MPCA using Zonation software. Multivariate analyses were performed to compare methodologies, analysing environmental variables, ecological areas, forest types and protected areas. Multivariate and ecological indexes showed that deer, lizards and darkling-beetles presented a narrow range, while birds and plants presented a large range of marginality and specialization mainly related to vegetation and climate. At provincial level, highest potential biodiversity and conservation priority values were related to shrublands and humid steppes. However, MPCA showed higher values related to forests and alpine vegetation due to endemism, while MPB showed differences among forest types. These analyses showed that the most valuable areas were not represented in the protected areas, however, many higher conservation priority values were found inside the protected compared with unprotected areas. Different spatial decision-support maps presented similar outputs at provincial scale, but differed in the forest landscape matrix. Both methodologies can be used to plan conservation strategies depending on the specific objectives (e.g. highlighting richness or endemism).

Journal for Nature Conservation, Jun 1, 2023

Journal of Arid Environments, Nov 1, 2011

Net photosynthetic rate (A) and stomatal conductance (gs) from leaves of Berberis buxifolia and B... more Net photosynthetic rate (A) and stomatal conductance (gs) from leaves of Berberis buxifolia and Berberis heterophylla saplings were measured under different conditions of radiation and water availability and for leaves of different ages. Comparative studies of basic physiological performance would give insight how these shrubs survive and grow under this austral extreme ecosystem. B. buxifolia had higher A values than

Global Ecology and Biogeography

AimClimate change is transforming mountain summit plant communities worldwide, but we know little... more AimClimate change is transforming mountain summit plant communities worldwide, but we know little about such changes in the High Andes. Understanding large‐scale patterns of vegetation changes across the Andes, and the factors driving these changes, is fundamental to predicting the effects of global warming. We assessed trends in vegetation cover, species richness (SR) and community‐level thermal niches (CTN) and tested whether they are explained by summits' climatic conditions and soil temperature trends.LocationHigh Andes.Time periodBetween 2011/2012 and 2017/2019.Major taxa studiedVascular plants.MethodsUsing permanent vegetation plots placed on 45 mountain summits and soil temperature loggers situated along a ~6800 km N‐S gradient, we measured species and their relative percentage cover and estimated CTN in two surveys (intervals between 5 and 8 years). We then estimated the annual rate of changes for the three variables and used generalized linear models to assess their rel...

Plants

In the upper vegetation limit of the Andes, trees change to shrub forms or other life forms, such... more In the upper vegetation limit of the Andes, trees change to shrub forms or other life forms, such as low scrubs. The diversity of life forms decreases with elevation; tree life forms generally decrease, and communities of shrubs and herbs increase in the Andean highlands. Most of treeline populations in the northwestern Argentina Altiplano are monospecific stands of Polylepis tarapacana, a cold-tolerant evergreen species that is able to withstand harsh climatic conditions under different life forms. There are no studies for P. tarapacana that analyze life forms across environmental and human impact gradients relating them with environmental factors. This study aims to determine the influence of topographic, climatic, geographic and proxies to human uses on the occurrence of life forms in P. tarapacana trees. We worked with 70 plots, and a new proposal of tree life form classification was presented for P. tarapacana (arborescent, dwarf trees, shrubs and brousse tigrée). We describe t...

Humanities and Social Sciences Communications

Socio-ecology studies the relationships between human activities and natural systems and their im... more Socio-ecology studies the relationships between human activities and natural systems and their importance in management and public policy. Our objective was to analyse how published papers in countries with a high Human Development Index (HDI) perform socio-ecological studies and compare them between the Northern and Southern Hemispheres. To do this, we used the Scopus platform as a source for searching and obtaining scientific papers about socio-ecological studies conducted in countries from the Northern and Southern Hemispheres. We calculated the number (n) of papers published per year and classified them using the main subject areas of the SCImago Journal & Country Rank database. Then, we analysed whether papers included specific recommendations for natural system management, nature conservation, policies or governance structures, or science in general. Besides, we studied whether the papers addressed socio-ecological studies related to flora and fauna and from what specific grou...

Ecological Processes

BackgroundThe European rabbit (Oryctolagus cuniculusL. 1758) was introduced into different region... more BackgroundThe European rabbit (Oryctolagus cuniculusL. 1758) was introduced into different regions of the world, generating significant trade-offs that critically impacted native vegetation. Here, we evaluate the rabbit's forage intakes in three vegetation types (forests, shrublands, and grasslands) along the four seasons in a temperate forest landscape in Southern Patagonia and discuss the potential threats over native vegetation. We formulated the following questions: (i) what is the forage offer at each vegetation type? (ii) what is the rabbit's forage intake and how it varied across the seasons along the year? and (iii) which vegetation types and plant life forms were more used according to the rabbit's forage intakes?MethodsWe censused understory vegetation to characterize the forage offer at each vegetation type and determined seasonal dietary intakes using microhistological analysis of pellets. The plant species identified in the field were grouped according to li...

Uso sostenible del bosque: Aportes desde la Silvicultura Argentina (Eds. Peri P.L.; Martínez Pastur G.; Schlichter T.). Ediciones Ministerio de Ambiente y Desarrollo Sustentable (MAyDS), Buenos Aires. Capítulo 2, p. 49-77, Sep 22, 2021

La Argentina posee una enorme diversidad de paisajes y gradientes ambientales que favorecen el ma... more La Argentina posee una enorme diversidad de paisajes y gradientes ambientales que favorecen el mantenimiento de una enorme y variada biodiversidad, con características particulares con un alto interés de conservación. En este capítulo se describen los principales ecosistemas boscosos de las principales regiones forestales de la Argentina. Este capítulo permite dimensionar la diversidad de tipos forestales que posee la Argentina a lo largo de sus regiones forestales, mostrando el enorme desafío que representa plantear propuestas de manejo sostenible considerando solo la dimensión ecológica, y que se complejiza cuando se consideran otros aspectos ineludibles como las dimensiones sociales o económicas, que generan sinergias positivas y negativas para el uso y la conservación.EEA Santa CruzFil: Matteucci, Silvia D. Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires; Argentina.Fil: Matteucci, Silvia D. Universidad de Buenos Aires. Facultad de Arquitectura, Diseño y Urbanismo. Grupo de Ecología de Paisajes y Medio Ambiente; Argentina.Fil: Martínez Pastur, Guillermo José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas (CADIC); Argentina.Fil: Lencinas, María Vanessa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas (CADIC); Argentina.Fil: Rovere, Adriana E. Universidad Nacional del Comahue; Argentina.Fil: Rovere, Adriana E. Consejo Nacional de Investigaciones Científicas y Técnicas. INIBIOMA. Bariloche; Argentina.Fil: Amoroso, Mariano M. Universidad Nacional de Río Negro. Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural; Argentina.Fil: Amoroso, Mariano M. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural; Argentina.Fil: Barberis, Ignacio Martín. Universidad Nacional de Rosario. Instituto de Investigaciones en Ciencias Agrarias de Rosario; Argentina.Fil: Barberis, Ignacio Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ciencias Agrarias de Rosario; Argentina.Fil: Vesprini, José Luis. Universidad Nacional de Rosario. Instituto de Investigaciones en Ciencias Agrarias de Rosario; Argentina.Fil: Vesprini, José Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ciencias Agrarias de Rosario; Argentina.Fil: Galetto, Leonardo. Universidad Nacional de Córdoba. Facultad de Ciencias, Exactas, Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Galetto, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Torres, Carolina Cecilia. Universidad Nacional de Córdoba. Facultad de Ciencias, Exactas, Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Torres, Carolina Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Villagra, Pablo Eugenio. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA); Argentina.Fil: Villagra, Pablo Eugenio. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias; Argentina.Fil: Malizia, Lucio Ricardo. Universidad Nacional de Jujuy. Facultad de Ciencias Agrarias; Argentina.Fil: Malizia, Lucio Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Blundo, Cecilia. Universidad Nacional de Tucumán. Instituto de Ecología Regional; Argentina.Fil: Blundo, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ecología Regional; Argentina.Fil: Politi, Natalia. Universidad Nacional de Jujuy. Facultad de Ciencias Agrarias; Argentina.Fil: Politi, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina.Fil: Peri, Pablo Luis. Universidad Nacional de la Patagonia Austral; Argentina.Fil: Peri, Pablo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina

Anales del Instituto de la Patagonia; Vol. 47 Núm. 1 (2019); 31-53, Aug 17, 2021

Fil: Mansilla, Paula Romina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro A... more Fil: Mansilla, Paula Romina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Austral de Investigaciones Cientificas; Argentina;

Trees, 2021

Key message Flower to fruits × and seed-to-seedling were the most critical transition in the earl... more Key message Flower to fruits × and seed-to-seedling were the most critical transition in the early regeneration cycle of pure and mixed Nothofagus forests, both in coastal and mountain geographic locations. Within mixed forest, the deciduous N. pumilio shows better recruitment performance (e.g., highest transition probabilities) than the evergreen N. betuloides . The evergreen species fails to recruit in the mixed coastal forests for two of the three analysed cohorts, which implies an advantage of N. pumilio over N. betuloides that must be further examined. However, N. betuloides in average value had a higher probability of reaching 2-year survivor in mixed forest. Abstract Transition from flower to seedling encompasses major processes that define the success of the tree regeneration, and consequently, its study is crucial in the context of forest management. Here, we analysed the transition probability of the reproductive cycle of two Nothofagus species, which formed pure and mixed forests in coastal and mountain geographic locations of Tierra del Fuego (Argentina). Pure deciduous N. pumilio (Np), pure evergreen N. betuloides (Nb), and mixed N. pumilio – N. betuloides (M) forests in coasts and mountains (3 forest types × 2 geographic locations × 20 replicas = 120 replicas) were evaluated. Reproductive structures (female flowers, fruits, seeds, sound seeds, emerged seedlings and surviving seedlings up to 2 years) were studied since 2012–2018. Our results suggested that transition probabilities from flower to surviving seedlings varied inter-annually between N. pumilio and N. betuloides . The hazard ratio in the transition showed an influence of the cohorts and the geographic location on N. pumilio , while forest type and geographic location influenced on N. betuloides . Flower to fruits and seed to seedling were the most critical process in all forest types and locations. Cumulative transition probabilities (female flowers to 2-year-old seedlings) for N. pumilio were 0.3–46.2% in Np and 1.4–30.2% in M, and pure and mixed forests reached similar probabilities only in cohort 3. For N. betuloides , these were 2.8–24.4% in Nb and 0.0–6.5% in M. Both Nothofagus species showed a better performance of pure forests in mountains (15.9–46.2% Np; 3.8–24.8% Nb) than in coasts (0.3–16.1% Np; 2.8–5.3% Nb). Through this integrated approach, considering the full reproductive cycle, it is possible to quantify the influence of canopy composition and inter-annual variability in natural forest dynamic, and allows to identify the critical stages of tree recruitment in pure and mixed Nothofagus forests.

Forest Ecology and Management, 2020