Catégorie : Forêt

LIA FORESTIA web seminars 2023

SEMINAR # 8

« Effects of drought on the growth, vitality and mortality of Mediterranean forests in South-Eastern France« 

Dr. Maxime Cailleret

UMR RECOVER , INRAE Aix en Provence, France

December 1st, 3pm (CET/Paris time)

 

Abstract

Mediterranean forest ecosystems face increasingly long and frequent drought periods, which affect their functioning and the services they provide. However, our ability to predict their current and future response to drought is limited, which constrains the development of adaptive forest management strategies.

Based on observational data collected along environmental gradients, and on experimental data from a common garden and from a highly monitored site with rainfall manipulation, I will address these points focusing on mixed Pinus halepensis – Quercus ilex forests in South-Eastern France.

In this presentation, I will specifically detail (1) how drought impacts tree primary and secondary growth at both short- and long-terms; (2) how these changes in tree functioning and structure modify tree vitality and mortality risk; and (3) the environmental drivers that predispose this decline in tree vitality. To end on a more positive note, I will describe how forest management can modulate this increasing impact of drought on forest dynamics (e.g., by thinning, stand mixing, or replacement/enrichment by more drought-tolerant provenances or species).

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Free registration below or following this link : LIA FORESTIA 2023 – seminar #8

Registration required to receive the link to join the seminar

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MiDi is a interdisciplinary Research Thematic Network, focused on biodiversity and habitats and funded by the Centre-Val de Loire Region. The network aims to promote studies in multiple fields of BioGeoSciences and Human and Social Sciences in relation to global changes.

This conference is organised in partnership with Le Studium (Institute for Advanced Studies).

contact: rtrmidi@univ-tours.fr

LIA FORESTIA web seminars 2023

SEMINAR # 7

« Remote sensing applied to forest mortality assessment : the case study of an unprecedented mortality event in mature Pine plantations in Argentina »

Dr. Gabriel Gativa

CIGEOBIO (Universidad Nacional de San Juan – CONICET) / Forest Ecology Group (Tandil, IPADS Balcarce INTA CONICET) , Argentina

November 3rd, 3pm (CET/Paris time)

 

Abstract

The applications of remote sensing techniques are under continuous development. In the present seminar we present their possibilities in relation to studies of forest mortality, in particular to commercial plantations. In contrast to studies focused on natural forests, little evidence exists on the impact of “hotter-drought” events on commercial forestry species planted outside their native range. With the aid of remote sensing, complemented with field surveys, we explored an unexpected and regionally-distributed tree mortality event that occurred recently in commercial pine species across the Mesopotamian region of Argentina, South America. The event was associated with a hotter-drought period during the 2021-2022 warm season preceded by three years of drought and was spatially heterogeneous at regional and local scales. We used Sentinel 2 and Landsat 8 multispectral images and Random Forests algorithms to map canopy mortality timing, rate, and magnitude in Pinus taeda and their association with environmental and stand characteristics at the local scale to determine which conditions make these productive systems more vulnerable to extreme climatic events. We found that landscape characteristics and previous conditions are important drivers of the occurrence and mortality rate in the forest stands studied. The methodology could be applied in other systems serving as a useful tool to  define the areas more suitable for climate-smart forest management as well as to build mortality-risk maps in productive landscapes.

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Free registration below or following this link : LIA FORESTIA 2023 – seminar #7

Registration required to receive the link to join the seminar

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MiDi is a interdisciplinary Research Thematic Network, focused on biodiversity and habitats and funded by the Centre-Val de Loire Region. The network aims to promote studies in multiple fields of BioGeoSciences and Human and Social Sciences in relation to global changes.

This conference is organised in partnership with Le Studium (Institute for Advanced Studies).

contact: rtrmidi@univ-tours.fr

LIA FORESTIA web seminars 2023

SEMINAR # 6

« Community-based forest management in Mexico and climate change mitigation »

Pr. Gregorio Ángeles-Pérez

Postgrado en Ciencias Forestales, Colegio de Postgraduados, Mexico

October 6th, 3pm (CET/Paris time)

 

Abstract

The functional role of forests ecosystems in climate change mitigation is well recognized by fixing atmospheric carbon (C). However, they are also vulnerable to natural and human-induced disturbances. Forests may act as sinks or sources depending on the balance between atmospheric CO₂ emissions and removals. Nonetheless, C dynamics in forest ecosystems are complex and multifactorial. Understanding these dynamics is essential for managing forests sustainably and preserving C stocks. Questions such as to what extent does the carbon cycle change when a forest is harvested? What is the behavior of managed forests for timber production in terms of CO₂ emissions and removals? Are the forests under community-based forest management sustainable? are necessary to answer, to determine precisely the magnitude to which forests under forest management are capable of removing atmospheric CO₂, and therefore mitigating climate change. Here I will use as a model the Intensive Carbon Monitoring Site Atopixco in central Mexico, to show some results regarding C dynamics in intensively managed forest for timber production. The aim of this site is to generate detailed information regarding C stocks and flux rates that may not be easily quantified over large areas, and to analyze processes of CO₂ uptake and release that can help explain observed changes that result from forest management activities and natural disturbances. Of particular interest is the community-based forest management for timber production in Mexico, since most of such forested land is owned by ejidos and communities, where they are actively involved in decision-making regarding forestry operations and forest conservation.

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Free registration below or following this link : LIA FORESTIA 2023 – seminar #6

Registration required to receive the link to join the seminar

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MiDi is a interdisciplinary Research Thematic Network, focused on biodiversity and habitats and funded by the Centre-Val de Loire Region. The network aims to promote studies in multiple fields of BioGeoSciences and Human and Social Sciences in relation to global changes.

This conference is organised in partnership with Le Studium (Institute for Advanced Studies).

contact: rtrmidi@univ-tours.fr

LIA FORESTIA web seminars 2023

SEMINAR # 5

« Drivers of diversity structuration in black poplar (Populus nigra L.) ? »

Dr. Véronique Jorge

UMR BIOFORA, INRAE/ONF Orléans, France

September 8th, 3pm (CET/Paris time)

 

Abstract

Black poplar (Populus nigra L.) is among the tree species having the largest natural distribution in Europe, from West Great Britain to West Asia, and from the foot of the Ural Mountains to the North of Africa. Thus, this species is potentially subjected to a wide variation of climatic conditions. Previous studies on variability of traits in this species showed structure and different distribution patterns depending on the trait, demonstrating potential local adaptation. In the last decade, we have developed molecular tools to study the factors shaping the diversity of the species. Today, these tools allow us to detect patterns of selection along the genome, to identify polymorphism involved in adaptative traits, to model demographic history of the species, and to evaluate how gene flow impact structure of populations. These molecular tools and results constitute the toolbox for breeding and conservation programs of black poplar.

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Free registration below or following this link : LIA FORESTIA 2023 – seminar #5

Registration required to receive the link to join the seminar

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MiDi is a interdisciplinary Research Thematic Network, focused on biodiversity and habitats and funded by the Centre-Val de Loire Region. The network aims to promote studies in multiple fields of BioGeoSciences and Human and Social Sciences in relation to global changes.

This conference is organised in partnership with Le Studium (Institute for Advanced Studies).

contact: rtrmidi@univ-tours.fr

LIA FORESTIA web seminars 2023

SEMINAR # 4

« How vulnerable are the high mountain forests of Mexico to climate change ? »

Dr. Armando Gómez Guerrero

Graduate program in Forest Science, Colegio de Postgraduados, Mexico

June 16th, 3pm (CET/Paris time)

 

Abstract

The rapid change in the chemical composition of the atmosphere in the last century, especially in the CO₂ concentration, has had important consequences on the energy balance of the planet, with direct impacts on the processes of the biosphere, lithosphere, and hydrosphere. Collectively, the imbalances in energy fluxes are the driving agent for what we know as climate change. Scientific literature show that the global climate is being increasingly more erratic, modifying the functionality of many ecosystems. Forests around the world are experiencing changes in their productivity, structure, composition, resistance, and resilience. Some high and middle elevation forests in Mexico growing between 3200 and 4000 m and represented by Pine (Pinus hartwegii Lindl.) and fir (Abies religiosa Kunth Schltdl. et Cham.) are also showing some impacts related to climate change. One important question to address is How vulnerable are these forests to climate change? The answer is not easy, however, combining results from some independent past studies we have made with students and colleagues, we can provide some insights about the vulnerability of these forests, considering the following axes: (1) Vulnerability related to soil depth and water and nutrients supply; available soil P reserves will become critical  in these volcanic soils; (2) Vulnerability related to nutrient circulation; nutrient circulation and exports due to tree removal are important, (3) Vulnerability due to variations in water use efficiency; although plants could benefit from the CO₂ increases, saving water not necessarily results in higher tree growth;  and (4) Vulnerability due to other external disturbances such as pests and forest fires; the time for tree growth recovery is getting longer as climate change progress.  Discussing the vulnerability of the forests according to these four axes can give us some insights about the forest functioning and the effects of climate change. In the last part of this talk I will comment on the urgency of taking actions to protect forests from the threats of climate change, involving the communities who live in the forest and who are the owners of these lands.

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Free registration following this link : LIA FORESTIA 2023 – seminar #4

Registration required to receive the link to join the seminar

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MiDi is a interdisciplinary Research Thematic Network, focused on biodiversity and habitats and funded by the Centre-Val de Loire Region. The network aims to promote studies in multiple fields of BioGeoSciences and Human and Social Sciences in relation to global changes.

This conference is organised in partnership with Le Studium (Institute for Advanced Studies).

contact: rtrmidi@univ-tours.fr

LIA FORESTIA web seminars 2023

SEMINAR # 1

« Adaptation of Forests and Agroforests to Climate Change: A new large-scale, long-term, global international initiative« 

Philippe Rozenberg,

INRAE Val de Loire, Orléans, France

March 31st, 3pm (CET/Paris time)

 

Abstract

The INRAE International Priority Program “Adaptation of Forests and Agroforests to Climate Change” is a new large-scale, long-term, global international initiative.

In response to the increasingly worrying, even catastrophic, state of the world’s forests and the uncertainty that accompanies their future, INRAE and a group of international experts have just launched a new large-scale, global initiative to collaborate on the development of future science-based adaptation solutions.

Current and future tree species ranges, geographical distribution of climate, disturbances as well as patterns and processes of biological invasions do not follow country borders and make internationalization of research a mandatory step. International collaboration gives access to study contexts, models and resources not necessarily available locally while increasing the power and the significance of experimentation and of research outcomes. 

Several actions are currently being carried out or are in preparation, with the aim of establishing this initiative on a large scale and of developing it in the form of several complementary international research projects.

 

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Free registration following this link : LIA FORESTIA 2023 – seminar #1

Registration required to receive the link to join the seminar

---

MiDi is a interdisciplinary Research Thematic Network, focused on biodiversity and habitats and funded by the Centre-Val de Loire Region. The network aims to promote studies in multiple fields of BioGeoSciences and Human and Social Sciences in relation to global changes.

This conference is organised in partnership with Le Studium (Institute for Advanced Studies).

contact: rtrmidi@univ-tours.fr