scholarly journals A word of caution when planning forest management using projections of tree species range shifts

2010 ◽  
Vol 86 (3) ◽  
pp. 312-316 ◽  
Author(s):  
Yueh-Hsin Lo ◽  
Juan A. Blanco ◽  
J. P. (Hamish) Kimmins

In this note we raise our concerns about the use of climate envelope models as a basis for forest planning under climate change. Such models assume constant relationships among tree species presence, abundance or growth rates and climatic variables, and that these can be transferred from their current distribution areas to areas that are predicted to have a similar future climate. Climate is an important determinant of tree species distributions, but its effects are mediated through soils, competition from other plant species, herbivores, diseases, insects and fire. This complexity should be addressed when making predictions about plant species distribution changes. If forecasts based only on climate are accepted uncritically and become the basis for forest policy and practice, there could be important consequences for the success of forest management. We illustrate the issue with the historical response of tree growth to climate variability for three conifer species along an altitudinal gradient in southern interior British Columbia. The growth–climate relationships differ not only among species but also between ecological zones, which implies that the different combinations of tree species and site will react differently to the same change in climate. All things considered, caution is needed when developing management plans using predicted future tree distributions based only on current/past tree/climate relationships. Key words: climate-envelope models, climate change, species distributions, dendroclimatology

2021 ◽  
Vol 23 (2) ◽  
pp. 168-181
Author(s):  
C. Ofoegbu ◽  
C. Ifejika Speranza

In South Africa, forests can play an important role in achieving the broader goals of climate change mitigation and adaptation. However, national policies on climate change mitigation and adaptation seem to narrow the potential contributions of the forest sector to climate protection targets. This is largely because of the divergence between the management goals of forests for climate protection, and products for both industries and livelihoods. This article uses discourse analysis as a methodological tool to analyze South Africa's climate and forest policies to identify the discourses shaping forest policy goals and mandates, and their integration into climate policy targets for forest-based climate change interventions. Four discourses, namely, preservation of forest integrity, social inclusiveness, equitable benefit sharing, and inclusive development of forests and forest-based communities, were identified as the dominant discourses influencing forest policy goals in South Africa. Their influence on forest management programmes has a mix of costs and benefits outcomes. For example, policy responses to the discourse on the preservation of forest integrity have resulted in ecologically sustainable forests in some cases and in other cases restricted the participation of local people in forest enterprise development. Additionally, climate policies recognized six possible interventions with respect to forest-based climate change mitigation and adaptation in South Africa but were silent about the four discourses shaping forest policy goals. Consequently, existing climate policies do not contain regulations to guide forest management for climate change mitigation and adaptation. We therefore recommend that forest-related goals in climate policy be grounded in the past experiences and lessons of forest policy implementations in order to take advantage of the synergies and reduce the trade-offs with respect to multipurpose management of forests for livelihoods, enterprise development, and climate change mitigation and adaptation.


Author(s):  
Stefan Friedrich ◽  
Torben Hilmers ◽  
Claudia Chreptun ◽  
Elizabeth Gosling ◽  
Isabelle Jarisch ◽  
...  

AbstractForest management faces growing uncertainty concerning environmental conditions and demand for ecosystem services. To help forest managers consider uncertainty, we applied a robust and multi-criteria approach to select the optimal composition of a forest enterprise from 12 stand types. In our simulation, the forest enterprise strives for either financial return or a multi-criteria forest management considering financial return, carbon storage and forest ecosystem stability. To quantify the influence of climate change on these decision criteria, we used the concept of analogous climate zones. Our results provide recommendations for long-term strategies for tree species selection in a Southeast German forest enterprise. The results show that considering both uncertainty and multifunctionality in forest management led to more diversified forest compositions. However, robust and multi-criteria optimisation required the forest enterprise to pay a premium in terms of lower income. Financial returns decreased when forest composition accounted for uncertainty or multiple objectives. We also found that adaptation measures could only partly financially compensate the effects of climate change. As the study is limited to two tree species, including additional tree species, variants of mixing proportions and further silvicultural strategies in the optimisation appears a promising avenue for future research.


2020 ◽  
Author(s):  
Matteo Pecchi ◽  
Maurizio Marchi ◽  
Marco Moriondo ◽  
Giovanni Forzieri ◽  
Marco Ammoniaci ◽  
...  

Abstract Background: Forests provide a range of ecosystem services essential for the human wellbeing and their ability is influenced by climate background and further connected to forest management strategies. Italy is a well-known biodiversity hotspot but an uncertainty assessment of the potential impact of climate change is still missing in this country. The aim of this paper is model the potential impact of climate change on 19 tree species occurring across the Italian forests using a species distribution modelling approach, six different Global Circulation Models (GCMs) and one Regional Climate Models (RCMs) for 2050s under an intermediate forcing scenario (RCP 4.5). Results: While no sensible variation in the spatial distribution of the total forested area has been predicted with some tree species gaining space and covering the spatial contractions of others, results showed substantial differences between each species and different climate models. The analyses reported an unchanged amount of total land suitability to forest growth in mountain areas while smaller values were predicted for valleys and floodplains than high-elevation areas. Pure woods were predicted as the most influenced when compared with mixed stands which are characterized by a greater species richness and therefore a supposed higher level of biodiversity and resilience to climate change threatens. Pure softwood stands (e.g. Pinus, Abies) were more sensitive than hardwoods (e.g. Fagus, Quercus), probably due to their artificial origin which established pure stands with tree species generally more prone to admixture with others in (semi)-natural ecosystems.Conclusions: Forest management could play a fundamental role to reduce the potential impact of climate change on forest ecosystems. Silvicultural practices should be aimed at increasing the species richness and favouring hardwoods currently growing as dominating species under conifers canopy, stimulating the natural regeneration, gene flow and supporting (spatial) migration processes.


2016 ◽  
Vol 11 (2) ◽  
pp. 100-104
Author(s):  
Бурганов ◽  
Farit Burganov ◽  
Минниханов ◽  
Azat Minnikhanov ◽  
Файзрахманов ◽  
...  

Nowadays, the forest policy in the field of forest management and husbandry in the Russian Federation is aimed at the possibility of wood realization, produced by different forest owners. The solution of this sharp problem in the Republic of Tatarstan is more associated with the launch of the plant in Elabuga for the production of resin-bonded chipboard, which served as a stimulus for action by the Ministry of Forestry, and it became necessary to make optimal computational wood-cutting area and placement volumes of storage for forest districts of Tatarstan. The article discusses: the structure of forest stands by groups of tree species and age groups of the Republic of Tatarstan as of 01.01.2016; the distribution of forest by age class; the allocation of forest areas of the the Republic of Tatarstan by dominant species in the period from 1940 to 2016.


Forests ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 809 ◽  
Author(s):  
Gintautas Mozgeris ◽  
Vilis Brukas ◽  
Nerijus Pivoriūnas ◽  
Gintautas Činga ◽  
Ekaterina Makrickienė ◽  
...  

Research Highlights: Validating modelling approach which combines global framework conditions in the form of climate and policy scenarios with the use of forest decision support system to assess climate change impacts on the sustainability of forest management. Background and Objectives: Forests and forestry have been confirmed to be sensitive to climate. On the other hand, human efforts to mitigate climate change influence forests and forest management. To facilitate the evaluation of future sustainability of forest management, decision support systems are applied. Our aims are to: (1) Adopt and validate decision support tool to incorporate climate change and its mitigation impacts on forest growth, global timber demands and prices for simulating future trends of forest ecosystem services in Lithuania, (2) determine the magnitude and spatial patterns of climate change effects on Lithuanian forests and forest management in the future, supposing that current forestry practices are continued. Materials and Methods: Upgraded version of Lithuanian forestry simulator Kupolis was used to model the development of all forests in the country until 2120 under management conditions of three climate change scenarios. Selected stand-level forest and forest management characteristics were aggregated to the level of regional branches of the State Forest Enterprise and analyzed for the spatial and temporal patterns of climate change effects. Results: Increased forest growth under a warmer future climate resulted in larger tree dimensions, volumes of growing stock, naturally dying trees, harvested assortments, and also higher profits from forestry activities. Negative impacts were detected for the share of broadleaved tree species in the standing volume and the tree species diversity. Climate change effects resulted in spatially clustered patterns—increasing stand productivity, and amounts of harvested timber were concentrated in the regions with dominating coniferous species, while the same areas were exposed to negative dynamics of biodiversity-related forest attributes. Current forest characteristics explained 70% or more of the variance of climate change effects on key forest and forest management attributes. Conclusions: Using forest decision support systems, climate change scenarios and considering the balance of delivered ecosystem services is suggested as a methodological framework for validating forest management alternatives aiming for more adaptiveness in Lithuanian forestry.


2017 ◽  
Vol 24 (3) ◽  
pp. 1150-1163 ◽  
Author(s):  
Marcin K. Dyderski ◽  
Sonia Paź ◽  
Lee E. Frelich ◽  
Andrzej M. Jagodziński

2020 ◽  
Author(s):  
Julius Sebald ◽  
Timothy Thrippleton ◽  
Werner Rammer ◽  
Harald Bugmann ◽  
Rupert Seidl

<div> <div> <div> <p>Forests are strongly affected by climatic changes, but impacts vary between tree species and prevailing site conditions. A number of studies suggest that increasing tree species diversity is a potent management strategy to decrease climate change impacts in general, and increase the resilience of forest ecosystems to changing disturbance regimes. However, most studies to date have focused on stand-level diversity in tree species (alpha diversity), which is often difficult to implement in operational forest management. Inter-species competition requires frequent management interventions to maintain species mixture and complicates the production of high-quality stemwood. An alternative option to increasing alpha diversity is to increase tree species diversity between forest stands (beta diversity). Here we quantify the effects of alpha and beta diversity on the impact of forest disturbances under climate change. We conducted a simulation experiment applying two forest landscape models (i.e. iLand and LandClim) in two landscapes with strongly contrasting environmental conditions in Central Europe. Simulations investigate different levels of tree species diversity (no diversity, low diversity and high diversity) in different spatial arrangements (alpha diversity, beta diversity). Subsequently a standard forest management regime and a series of prescribed disturbances are applied over 200 years. By analyzing biomass values relative to a no-disturbance run, variation in biomass over time and the number of trees > 30 cm dbh per hectare, we isolate the effect of tree species diversity on the resistance of forests to disturbances.</p> </div> </div> </div>


2013 ◽  
Vol 101 (2) ◽  
pp. 441-453 ◽  
Author(s):  
Raúl García-Valdés ◽  
Miguel A. Zavala ◽  
Miguel B. Araújo ◽  
Drew W. Purves

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