Category :
Complex remote sensing-assisted forest surveys - Research article
article id 24056,
category
Complex remote sensing-assisted forest surveys - Research article
Brahim Meskour,
Adnane Labbaci,
Moussa Ait El Kadi,
Oualid Hakam,
Victor Ongoma,
Mohammed Hssaisoune,
Abdellaali Tairi,
Mohammed El Hafyani,
Lhoussaine Bouchaou.
(2025).
Drought and vegetation dynamics in dryland of arganeraie biosphere reserve in Morocco: toward an understanding of the impact of environmental shocks on the Agro-sylvo-pastoral system.
Silva Fennica
vol.
59
no.
2
article id 24056.
https://doi.org/10.14214/sf.24056
Highlights:
Argan agro-sylvo-pastoral system is a unique agro-ecosystem of arid land in the world; Climate variability, drought and vegetation dynamic are assessed in the GIAHS site using a combination of remote sensing and field investigation; Findings highlights a significant decrease in agricultural and woodland cover and consistent increase in drought; Resilience implications are discussed to inform socio-economic actors.
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Agroforestry systems are critical for building resilience to socio-environmental shocks, especially in drought-prone arid and semi-arid areas. This study the ecological impact of drought on the Mediterranean Globally Important Agricultural Heritage Systems (GIAHS) site of Ait Saoub-Ait Mansour in Morocco. Machine learning-based random forest (RF) classification and change detection were used to explore the change in land use classes such as built-up areas, agricultural areas, woodland, and bare land. Spatiotemporal analysis of temperature, precipitation, and Precipitation-Evapotranspiration Index (SPEI) is performed using Mann-Kendall and Sen’s slope test for the period 1983–2020. Additionally, the Normalised Difference Vegetation Index (NDVI) is analyzed from 2000 to 2020 for some specified crop species such as Argan tree (Argania spinosa (L.) Skeels), cereal, palm tree, and cereal mixed. The results show a decrease in the area of agricultural and woodland and a consistent increase in drought (decrease in SPEI-6 and SPEI-12) over time. Annual and seasonal trends in NDVI for Argan tree, cereal, palm tree, and mixed cereal are negative. These findings provide consistent evidence of the ongoing degradation of this ecosystem and the changing climate. The resilience implications are discussed to inform socio-economic actors and stakeholders.
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Meskour,
Applied Geology and Geo-Environment Laboratory, Faculty of Sciences, Ibn Zohr University, Agadir, 80035, Morocco
https://orcid.org/0009-0003-1698-8949
E-mail:
brahim.meskour@edu.uiz.ac.ma
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Labbaci,
Applied Geology and Geo-Environment Laboratory, Faculty of Sciences, Ibn Zohr University, Agadir, 80035, Morocco; Geosciences and Geo-Environment Laboratory, Faculty of Sciences, Ibn Zohr University, Agadir, 80035, Morocco
E-mail:
a.labbaci@uiz.ac.ma
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Ait El Kadi,
Applied Geology and Geo-Environment Laboratory, Faculty of Sciences, Ibn Zohr University, Agadir, 80035, Morocco
E-mail:
moussa.aitelkadi@edu.uiz.ac.ma
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Hakam,
Center for Remote Sensing Applications, Mohammed VI Polytechnic University, 43150, Ben-Guerir, Morocco
E-mail:
oualid.hakam@um6p.ma
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Ongoma,
International Water Research Institute, Mohammed VI Polytechnic University, Ben Guerir, 43150, Morocco
E-mail:
victor.ongoma@um6p.ma
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Hssaisoune,
Applied Geology and Geo-Environment Laboratory, Faculty of Sciences, Ibn Zohr University, Agadir, 80035, Morocco; Faculty of Applied Sciences, Ibn Zohr University, B.O. 6146 Azrou District, 86153, Ait Melloul, Morocco; International Water Research Institute, Mohammed VI Polytechnic University, Ben Guerir, 43150, Morocco
https://orcid.org/0000-0002-9388-3804
E-mail:
m.hssaisoune@uiz.ac.ma
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Tairi,
Applied Geology and Geo-Environment Laboratory, Faculty of Sciences, Ibn Zohr University, Agadir, 80035, Morocco
https://orcid.org/0009-0000-5612-4123
E-mail:
a.tairi@uiz.ac.ma
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El Hafyani,
Applied Geology and Geo-Environment Laboratory, Faculty of Sciences, Ibn Zohr University, Agadir, 80035, Morocco
E-mail:
m.elhafyani@uiz.ac.ma
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Bouchaou,
Applied Geology and Geo-Environment Laboratory, Faculty of Sciences, Ibn Zohr University, Agadir, 80035, Morocco; International Water Research Institute, Mohammed VI Polytechnic University, Ben Guerir, 43150, Morocco
E-mail:
l.bouchaou@uiz.ac.ma
Category :
Discussion article
article id 25031,
category
Discussion article
Simon Lebel Desrosiers,
Nicolas Bélanger,
Evelyne Thiffault,
Nelson Thiffault.
(2025).
Climate change and transformation in forest fire regimes: an opportunity for the implementation of assisted migration of tree species in the Canadian boreal forest?
Silva Fennica
vol.
59
no.
2
article id 25031.
https://doi.org/10.14214/sf.25031
Highlights:
Increasing fire activity is reshaping post-disturbance landscapes in boreal forests; Post-fire sites offer new opportunities for introducing climate-resilient tree species; Fire can improve or impair site conditions for forest regeneration; Assisted migration of tree species may enhance reforestation success after severe wildfires; Research on post-fire regeneration of introduced species remains critically limited.
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Climate change is intensifying fire regimes in boreal forests, leading to ecological disruption and raising concerns about forest resilience and post-disturbance recovery. Altered fire dynamics creates novel opportunities for implementing adaptive silviculture for climate change, including assisted migration, the intentional movement and establishment of tree species or tree populations outside their current range of distribution to better match anticipated future climates. Here, we examine how the increasing frequency, severity, and spatial extent of Canadian boreal wildfires can serve as strategic windows for introducing climate-resilient tree species and genotypes. We review how fire influences the availability and suitability of post-fire sites for assisted migration, highlighting how fire-induced changes in soil abiotic and biotic properties may facilitate or hinder the establishment of relocated tree species. While fire can simplify site preparation, reduce biotic competition, and temporarily enhance soil nutrient availability, it may also degrade soil structure by consuming or altering soil organic matter and increasing soil susceptibility to erosion and disrupt essential mycorrhizal associations. We argue that assisted migration of tree species can be a proactive silvicultural tool when used in areas with regeneration failure or where future climate conditions are likely to exceed the tolerance limits of native species. Whilst scientific evidence remains limited on the regeneration success of migrated species and genotypes in post-fire environments, we argue for an integrated adaptation strategy that combines natural regeneration with targeted assisted migration interventions, guided by local site conditions, genetic considerations, and policy support, to build resilient boreal forests under changing disturbance regimes.
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Lebel Desrosiers,
Laboratoire sur la science des données, Université du Québec (TÉLUQ), 5800, rue Saint-Denis, bureau 1105, Montréal, Québec H2S 3L5, Canada
https://orcid.org/0009-0007-1592-8505
E-mail:
simon.lebeldesrosiers@teluq.ca
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Bélanger,
Laboratoire sur la science des données, Université du Québec (TÉLUQ), 5800, rue Saint-Denis, bureau 1105, Montréal, Québec H2S 3L5, Canada
E-mail:
nicolas.belanger@teluq.ca
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Thiffault,
Centre de recherche sur les matériaux renouvelables, Université Laval, 2425 De la Terrasse St, Québec, Québec G1V 0A6, Canada
https://orcid.org/0000-0001-9586-3834
E-mail:
evelyne.thiffault@sbf.ulaval.ca
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Thiffault,
Service canadien des forêts, Ressources naturelles Canada, 1055, rue Du P.E.P.S., C.P. 10380, Québec, Québec G1V 4C7, Canada
https://orcid.org/0000-0003-2017-6890
E-mail:
nelson.thiffault@canada.ca
article id 570,
category
Discussion article
Anke Jentsch,
Carl Beierkuhnlein,
Peter S. White.
(2002).
Scale, the dynamic stability of forest ecosystems, and the persistence of biodiversity.
Silva Fennica
vol.
36
no.
1
article id 570.
https://doi.org/10.14214/sf.570
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Jentsch,
Conservation Biology and Ecological Modelling, UFZ – Centre for Environmental Research, Permoserstr. 15, D-04301 Leipzig, Germany
E-mail:
jentsch@pro.ufz.de
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Beierkuhnlein,
Department of Landscape Ecology, University of Rostock, Justus-Liebig-Weg 6, D-18051 Rostock, Germany
E-mail:
cb@nn.de
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White,
Department of Biology, Campus Box 3280, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3280, USA
E-mail:
psw@nn.us