Alessandra Bottero

Alessandra Bottero
WSL Institute for Snow and Avalanche Research SLF · Alpine Environment and Natural Hazards Research Unit

PhD

About

29
Publications
12,168
Reads
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869
Citations
Introduction
As a forest ecologist, I am interested in the influence and interaction of climate, disturbances, and management on forest ecosystems. Please visit my website for more information: http://www.bottero.ch
Additional affiliations
September 2021 - present
WSL Institute for Snow and Avalanche Research SLF
Position
  • Researcher
Description
  • https://www.wsl.ch/en/about-wsl/research-units/alpine-environment-and-natural-hazards.html
January 2020 - August 2021
Swiss Federal Institute for Forest, Snow and Landscape Research WSL
Position
  • Research Associate
Description
  • http://www.wsl.ch/fe/walddynamik/index_EN
January 2017 - December 2019
Swiss Federal Institute for Forest, Snow and Landscape Research WSL
Position
  • PostDoc Position
Description
  • http://www.wsl.ch/fe/walddynamik/index_EN
Education
January 2010 - February 2013
Università degli Studi di Torino
Field of study
  • Dissertation: “Interactions and ecological feedbacks between natural and anthropogenic disturbances in mountain forests in the European Alps”

Publications

Publications (29)
Article
Full-text available
Extreme droughts are expected to increase in frequency and severity in many regions of the world, threatening multiple ecosystem services provided by forests. Effective strategies to adapt forests to such droughts require comprehensive information on the effects and importance of the factors influencing forest resistance and resilience. We used a u...
Article
Climate models predict increasing drought intensity and frequency for many regions, which may have negative consequences for tree recruitment, growth, and mortality, as well as forest ecosystem services. Furthermore, practical strategies for minimizing vulnerability to drought are limited. Tree population density, a metric of tree abundance in a gi...
Article
Full-text available
Extreme climate events (ECEs) such as severe droughts, heat waves and late spring frosts are rare but exert a paramount role in shaping tree species distributions. The frequency of such ECEs is expected to increase with climate warming, threatening the sustainability of temperate forests. Here, we analyzed 2844 tree‐ring width series of five domina...
Article
Resilience is a key concept in ecology, describing the capacity of a system to resist a disturbance, recover from it and return to a stable state (Lloret et al., 2011; Hodgson et al., 2015; Ingrisch & Bahn, 2018, see Box 1). Whilst it is indisputable and a matter of intensive research (e.g., Mcdowell et al., 2008; Meinzer et al., 2009; Vicente‐Serr...
Article
Full-text available
Drought will increasingly threaten forest ecosystems worldwide. Understanding how competition influences tree growth response to drought is essential for forest management aiming at climate change adaptation. However, published results from individual case studies are heterogeneous and sometimes contradictory. We reviewed 166 cases from the peer-re...
Article
Full-text available
In southern European temperate forests, coppicing is a traditional form of forest management that shaped the present cultural landscape, providing multiple ecosystem services. Roe deer densities have been growing notably during the last decades mainly due to the abandonment of rural areas, changes in human land use and restocking. The impact of roe...
Chapter
Full-text available
National Forest Inventory (NFI) data are the main source of information on forest resources at country and subcountry levels. This chapter explores the strengths and limitations of NFI-derived indicators to assess forest development with respect to adaptation to and mitigation of climate change, that is, the criteria of Climate-Smart Forestry (CSF)...
Article
Full-text available
• By killing or weakening trees, drought could change the partitioning of growth between tree sizes or species, thereby altering stand structure. Growth partitioning, often quantified using the growth dominance coefficient (DC) or the shape of tree size versus growth relationships (SGR), indicates the relative contribution of differently sized tree...
Article
Climate-smart forestry (CSF) has gained increasing attention in recent years. Yet, a framework to assess the three pillars of CSF, in terms of mitigation and adaptation to climate change and ecosystem service (ES) provision based on national forest inventory (NFI) data is currently lacking. In this study, we present an assessment framework of CSF b...
Article
Full-text available
Promoting tree species diversity is commonly advocated in the anticipation of predicted increases in drought frequency and severity. However, mixing effects on drought responses vary substantially with site conditions and species identity. We combined annually resolved tree-ring data and repeated forest inventory data spanning the last 90 years to...
Article
Research on drought impact on tree functioning is focused primarily on water and carbon (C) dynamics. Changes in nutrient uptake might also affect tree performance under drought and there is a need to explore underlying mechanisms. We investigated effects of drought on a) in-situ nitrogen (N)-uptake accounting for both, N availability to fine-roots...
Article
Full-text available
The increasing demand for innovative forest management strategies to adapt to and mitigate climate change, and benefit forest production, so called Climate-Smart Forestry, calls for a tool to monitor and evaluate their implementation and their effect on forest development over time. The Pan-European set of criteria and indicators for sustainable fo...
Article
Full-text available
Global climate change is expected to further raise the frequency and severity of extreme events, such as droughts. The effects of extreme droughts on trees are difficult to disentangle given the inherent complexity of drought events (frequency, severity, duration, and timing during the growing season). Besides, drought effects might be modulated by...
Article
Full-text available
Foresters from many countries are seeking for tree species or provenances able to cope with expected climate change. While it becomes clear that some temperate tree species will increasingly suffer from climate warming, the fate of the ecologically and economically important silver fir (Abies alba Mill.) remains uncertain and debated because the ec...
Article
Reducing forest stand density through silvicultural thinning has demonstrated potential to mitigate drought impacts on growth; however, less has been studied on how changes in stand structure created by different thinning methods influence forest growth responses to drought. This research examined the growth responses to drought of natural-origin r...
Article
Full-text available
Climate-induced tree mortality became a global phenomenon during the last century and it is expected to increase in many regions in the future along with a further increase in the frequency of drought and heat events. However, tree mortality at the ecosystem level remains challenging to quantify since long-term, tree- individual, reliable observati...
Article
Full-text available
Forests around the world are experiencing increasingly severe droughts and elevated competitive intensity due to increased tree density. However, the influence of interactions between drought and competition on forest growth remains poorly understood. Using a unique dataset of stand-scale dendrochronology sampled from 6405 trees, we quantified how...
Article
Full-text available
Prescribed fire is widely used for ecological restoration and fuel reduction in fire-dependent ecosystems, most of which are also prone to drought. Despite the importance of drought in fire-adapted forests, little is known about the cumulative effects of repeated prescribed burning on tree growth and related response to drought. Using dendrochronol...
Article
Full-text available
In the inner-Alpine Aosta Valley, severe growth reductions occurred in Scots pine stands during 1987-1993 and 2003-2005. Trees more sensitive to May precipitation exhibited stronger growth decline during these periods. Over the last decades, Scots pine (Pinus sylvestris L.) decline has involved large areas in the European Alps. Although the species...
Conference Paper
Full-text available
Summer drought frequency and severity are expected to increase according to most climate change projections, with possible negative effects on forest health and productivity. Developing adaptive forest management practices aimed at minimizing drought vulnerability and impacts is a major need and challenge for resource managers. Long-term thinning s...
Conference Paper
Full-text available
Drought events have become more frequent in the Mediterranean Basin since the 1970s, and natural forest productivity in the northern portion of the basin shows a declining trend. Among European regions, the Mediterranean Basin could be severely affected by climate change linked to global warming in the 21st century, undergoing drier conditions and...
Article
European larch (Larix decidua Mill.) forests in the Alps are cultural landscapes that have been shaped by humans for centuries through traditional management. Biological and historical data sources were employed, and a multi-scale approach was adopted to capture the influence of factors affecting the structure of these forests. Landscape and stand...
Article
Insect outbreaks and wind storms are the most common natural disturbances affecting the northern slopes of montane Norway spruce (Picea abies (L.) H. Karst.) forests in the European Alps. The combined effects on stand dynamics, including tree regeneration, of these natural disturbances and an anthropogenic (i.e., salvage logging) disturbance were s...
Book
Full-text available
Language: Italian. Premessa: Nel 2006 veniva pubblicato, a cura della Regione Autonoma Valle d’Aosta e della Regione Piemonte, il manuale “Selvicoltura nelle foreste di protezione: esperienze e indirizzi gestionali in Piemonte e Valle d’Aosta”. Tale volume, partendo dallo scambio di esperienze tra selvicoltori delle Alpi occidentali, forniva un pe...
Article
Full-text available
2011. Gap-phase dynamics in the old-growth forest of Lom, Bosnia and Herzegovina. Silva Fennica 45(5): 875–887. We investigated forest canopy gaps in the mixed beech (Fagus sylvatica L.), silver fir (Abies alba Miller), and Norway spruce (Picea abies (L.) Karst.) old-growth forest of Lom in the Dinaric Mountains of Bosnia and Herzegovina. Gap size,...

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Projects

Projects (5)
Project
Spruce-dominated mountain forests (SMF) have undergone extreme management changes in the past and will likely endure extreme structural and compositional changes in future due to large-scale disturbances triggered by warming and drought. These forests are the most widespread forest type in Switzerland and are extremely important in providing protection against natural hazards and multiple other ecosystem services. The project goal is to develop guidance and tools for managing SMF under the influence of previously unthinkable, extreme disturbances. Across different spatial scales and approaches, and in close collaboration with stakeholders, this project will contribute to improved decision support for management priorities and strategies related to future extreme disturbances in SMF. The MountEx project is part of the WSL research program Extremes. Project website: https://www.wsl.ch/en/projects/mountex.html
Project
How do trees adjust to warmer droughts on different time scales and where are the limits? Main objectives: (i) to assess the impacts of atmospheric warming and soil drought on short- and long-term mechanisms of tree acclimation from the leaf- to the whole-plant level; (ii) to compare acclimation potential gained from transgenerational epigenetic effects vs. local adaptation; (iii) to understand the limits of acclimation and the tipping points leading to progressive tree decline to predict mortality trajectories. Website: https://www.wsl.ch/en/projects/acclimation-and-environmental-memory-1.html Twitter: @acclimemo_wsl -