scholarly journals The Effects of Biotic and Abiotic Factors on the Community Dynamics in a Mountain Subtropical Forest

Forests ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 427
Author(s):  
Tianyang Zhou ◽  
Jiaxin Zhang ◽  
Yunzhi Qin ◽  
Mingxi Jiang ◽  
Xiujuan Qiao
Keyword(s):  
Climate Change ◽  
Ecosystem Services ◽  
Forest Dynamics ◽  
Community Dynamics ◽  
Abiotic Factors ◽  
Subtropical Forest ◽  
Above Ground Biomass ◽  
Short Term ◽  
Forest Ecosystem Services ◽  
Number Of Individuals

From supporting wood production to mitigating climate change, forest ecosystem services are crucial to the well-being of humans. Understanding the mechanisms that drive forest dynamics can help us infer how to maintain forest ecosystem services and how to improve predictions of forest dynamics under climate change. Despite the growing number of studies exploring above ground biomass (AGB) dynamics, questions of dynamics in biodiversity and in number of individuals still remain unclear. Here, we first explored the patterns of community dynamics in different aspects (i.e., AGB, density and biodiversity) based on short-term (five years) data from a 25-ha permanent plot in a subtropical forest in central China. Second, we examined the relationships between community dynamics and biodiversity and functional traits. Third, we identified the key factors affecting different aspects of community dynamics and quantified their relative contributions. We found that in the short term (five years), net above ground biomass change (ΔAGB) and biodiversity increased, while the number of individuals decreased. Resource-conservation traits enhanced the ΔAGB and reduced the loss in individuals, while the resource-acquisition traits had the opposite effect. Furthermore, the community structure contributed the most to ΔAGB; topographic variables and soil nutrients contributed the most to the number of individuals; demographic process contributed the most to biodiversity. Our results indicate that biotic factors mostly affected the community dynamics of ΔAGB and biodiversity, while the number of individuals was mainly shaped by abiotic factors. Our work highlighted that the factors influencing different aspects of community dynamics vary. Therefore, forest management practices should be formulated according to a specific protective purpose.

Wald und Klimawandel in der inneralpinen Trockenregion Visp

2012 ◽  
Vol 163 (12) ◽  
pp. 481-492
Author(s):  
Andreas Rigling ◽  
Ché Elkin ◽  
Matthias Dobbertin ◽  
Britta Eilmann ◽  
Arnaud Giuggiola ◽  
...  
Keyword(s):  
Climate Change ◽  
Ecosystem Services ◽  
Forest Management ◽  
Forest Ecosystem ◽  
Bark Beetles ◽  
Forest Ecosystems ◽  
Field Experiments ◽  
Forest Monitoring ◽  
Management Interventions ◽  
Forest Ecosystem Services

Forest and climate change in the inner-Alpine dry region of Visp Over the past decades, observed increases in temperature have been particularly pronounced in mountain regions. If this trend should continue in the 21st Century, frequency and intensity of droughts will increase, and will pose major challenges for forest management. Under current conditions drought-related tree mortality is already an important factor of forest ecosystems in dry inner-Alpine valleys. Here we assess the sensitivity of forest ecosystems to climate change and evaluate alternative forest management strategies in the Visp region. We integrate data from forest monitoring plots, field experiments and dynamic forests models to evaluate how the forest ecosystem services timber production, protection against natural hazards, carbon storage and biodiver-sity will be impacted. Our results suggest that at dry low elevation sites the drought tolerance of native tree species will be exceeded so that in the longer term a transition to more drought-adapted species should be considered. At medium elevations, drought and insect disturbances as by bark beetles are projected to be important for forest development, while at high elevations forests are projected to expand and grow better. All of the ecosystem services that we considered are projected to be impacted by changing forest conditions, with the specific impacts often being elevation-dependent. In the medium term, forest management that aims to increase the resilience of forests to drought can help maintain forest ecosystem services temporarily. However, our results suggest that relatively rigid management interventions are required to achieve significant effects. By using a combination of environmental monitoring, field experiments and modeling, we are able to gain insight into how forest ecosystem, and the services they provide, will respond to future changes.

scholarly journals Trade-offs between temporal stability and level of forest ecosystem services provisioning under climate change

2018 ◽  
Vol 28 (7) ◽  
pp. 1884-1896 ◽  
Author(s):  
Katharina Albrich ◽  
Werner Rammer ◽  
Dominik Thom ◽  
Rupert Seidl
Keyword(s):  
Climate Change ◽  
Ecosystem Services ◽  
Forest Ecosystem ◽  
Temporal Stability ◽  
Trade Offs ◽  
Forest Ecosystem Services

scholarly journals Wald und Klimawandel – Ansätze für eine ökonomische Bewertung | Forests and climate change – approaches to an economic valuation

2008 ◽  
Vol 159 (10) ◽  
pp. 374-380 ◽  
Author(s):  
Roland Olschewski ◽  
Peter Bebi ◽  
Adrienne Grêt-Regamey ◽  
Norbert Kräuchi
Keyword(s):  
Climate Change ◽  
Ecosystem Services ◽  
Resource Use ◽  
Forest Ecosystem ◽  
Economic Valuation ◽  
Management Approach ◽  
Sustainable Resource Use ◽  
Forest Ecosystem Services ◽  
New Findings ◽  
The Impact

The impact of climate change on forest ecosystem services will differ depending on the regional situation. Based on findings of natural sciences the impact on society can be assessed by applying economic valuation methods. We distinguish between cost- and benefit-oriented approaches, both of which necessary to provide a comprehensive basis for decision-making. Aspects of uncertainty that are especially related to protection services are considered by extended approaches, such as Bayesian networks combined with geographic information systems. Following an adaptive management approach these new findings can be integrated in the decision process and thus contribute to a sustainable resource use, while taking climate change as well as society's diverse demands for forest ecosystem services into account.

High rates of short-term dynamics of forest ecosystem services

2021 ◽  
Author(s):  
Tord Snäll ◽  
María Triviño ◽  
Louise Mair ◽  
Jan Bengtsson ◽  
Jon Moen
Keyword(s):  
Ecosystem Services ◽  
Forest Ecosystem ◽  
Short Term ◽  
Forest Ecosystem Services

scholarly journals Tropical tree growth sensitivity to climate is driven by species intrinsic growth rate and leaf traits

2021 ◽  
Author(s):  
David Bauman ◽  
Claire Fortunel ◽  
Lucas A. Cernusak ◽  
Lisa P. Bentley ◽  
Sean M. McMahon ◽  
...  
Keyword(s):  
Climate Change ◽  
Tree Growth ◽  
Tree Species ◽  
Forest Dynamics ◽  
Species Traits ◽  
Growth Responses ◽  
Growth Data ◽  
Short Term ◽  
Evaporative Demand

A better understanding of how climate affects growth in tree species is essential for improved predictions of forest dynamics under climate change. Long-term climate averages (mean climate) and short-term deviations from these averages (anomalies) both influence tree growth, but the rarity of long-term data integrating climatic gradients with tree censuses has so far limited our understanding of their respective role, especially in tropical systems. Here, we combined 49 years of growth data for 509 tree species across 23 tropical rainforest plots along a climatic gradient to examine how tree growth responds to both climate means and anomalies, and how species functional traits mediate these tree growth responses to climate. We showed that short-term, anomalous increases in atmospheric evaporative demand and solar radiation consistently reduced tree growth. Drier forests and fast-growing species were more sensitive to water stress anomalies. In addition, species traits related to water use and photosynthesis partly explained differences in growth sensitivity to both long-term and short-term climate variations. Our study demonstrates that both climate means and anomalies shape tree growth in tropical forests, and that species traits can be leveraged to understand these demographic responses to climate change, offering a promising way forward to forecast tropical forest dynamics under different climate trajectories.

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