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Selection: with tag disturbances [147 articles] 

 

Forest fires in Europe, Middle East and North Africa 2016

  

Abstract

[Excerpt: Foreword] Forests, agricultural land and natural areas continue to burn, both within and outside Europe. Lives of European citizens are lost and endangered. By early September 2017, wildfires have already burnt nearly 700 000 ha of land in the EU; hence this season will most likely be remembered as one of the most devastating wildfire seasons in Europe since records began. Moreover, sadly this year’s fires have taken a huge toll of lives in Southern Europe. Extreme weather conditions such ...

 

How have past fire disturbances contributed to the current carbon balance of boreal ecosystems?

  
Biogeosciences, Vol. 13, No. 3. (04 February 2016), pp. 675-690, https://doi.org/10.5194/bg-13-675-2016

Abstract

Boreal fires have immediate effects on regional carbon budgets by emitting CO2 into the atmosphere at the time of burning, but they also have legacy effects by initiating a long-term carbon sink during post-fire vegetation recovery. Quantifying these different effects on the current-day pan-boreal (44–84° N) carbon balance and quantifying relative contributions of legacy sinks by past fires is important for understanding and predicting the carbon dynamics in this region. Here we used the global dynamic vegetation model ORCHIDEE–SPITFIRE (Organising Carbon and ...

 

Climatological risk: wildfires

  
In Science for disaster risk management 2017: knowing better and losing less, Vol. 28034 (2017), pp. 294-305

Abstract

[Excerpt: Conclusions and key messages] There is a vast amount of information on wildfires at local, regional and global scales. However, problems remain at different scales in terms of harmonising or standardising practices for the assessment and management of wildfire risk. [\n] Resilience theory is providing a suitable framework by which to explain abrupt changes in socioecological systems. The importance of community participation and building social capital through collective learning and governance mechanisms has been highlighted as a required basis for building disaster resilience (Aldunce et al., 2015; Aldunce et al., 2016; Montiel and Kraus, 2010; O’Brien et al., ...

References

  1. SCION, 2009. Fire behavioiur app. https://www.scionresearch.com/research/forest-science/rural-fire-research/tools/fire-behaviour-smartphone-apps .
  2. NFPA, 2016 Firewise Communities Program. http://www.firewise.org/ .
  3. GOV.UK, n.d. LH1: Management of lowland heathlandhttps://www.gov.uk/countryside-stewardship-grants/management-of-lowland-heathland-lh1 .
  4. KWFW, 2014. Wildfire Threat Analysis (WTA):NERC-funded scoping project with Forestry Commission. http://www.kfwf.org.uk/_assets/documents/Wildfire_Threat_Analysis_post-project_report.pdf .
  5. HM Tresaury, 2013. Orange book: management of risk - principles and concepts. https://www.gov.uk/government/publications/orange-book .
  6. Cabinet Office, 2015. National Risk
 

Meteorological risk: extra-tropical cyclones, tropical cyclones and convective storms

  
In Science for disaster risk management 2017: knowing better and losing less, Vol. 28034 (2017), pp. 246-256

Abstract

[Excerpt: Conclusions and key messages] [::Partnership] Collaboration between forecast providers and end users in real time is essential during DRM, since the interpretation of the available information, the uncertainty associated with it and how this changes as new information becomes available should be made in consultation with qualified meteorologists and National Meteorological Services in particular. Information sharing, particularly observational, impact and warning data across national boundaries in real time, is of key importance. Improvements in forecasts will in part be driven by the interaction between fundamental atmosphere and ocean science with operational forecasting, so continued collaboration between forecasting centres and universities and ...

References

  1. AIR Worldwide, 2015. Preparing for Europe's Winter Storm Season with a Look Back at Niklas and Kyrill. http://www.air-worldwide.com/Publications/AIR-Currents/2015/Preparing-for-Europe-s-Winter-Storm-Season-with-a-Look-Back-at-Niklas-and-Kyrill/ .
  2. Anderson, G., Klugmann, D., 2014. A European lightning density analysis using 5 years of ATDnet data. Natural Hazards and Earth System Sciences 14(4), 815-829.
  3. Antonescu, B., Schultz, D.M., Lomas, F., Kühne, T., 2016. Tornadoes in Europe: Synthesis of the observational datasets. Monthly Weather Review.
  4. Bauer, P., Thorpe,
 

Factors explaining the spatial distribution of hillslope debris flows: a case study in the Flysch Sector of the Central Spanish Pyrenees

  
Mountain Research and Development, Vol. 22, No. 1. (1 February 2002), pp. 32-39, https://doi.org/10.1659/0276-4741(2002)022[0032:fetsdo]2.0.co;2

Abstract

The spatial distribution of 961 debris flows in the Upper Aragón and Gállego valleys (Central Spanish Pyrenees) was analyzed. Most were located in the Flysch Sector (with a colluvium mantle derived from strongly tectonically modified materials), between 1000 and 1400 m above sea level, on 25?35° gradients with sunny exposure. These gradients were either hillslopes covered by frequently burned scrubland, abandoned fields, or reforested land, confirming the influence of land use and disturbed landscapes on the occurrence of debris flows. ...

 

The concept of potential natural vegetation: an epitaph?

  
Journal of Vegetation Science, Vol. 21, No. 6. (December 2010), pp. 1172-1178, https://doi.org/10.1111/j.1654-1103.2010.01218.x

Abstract

We discuss the usefulness of the concept of Potential Natural Vegetation (PNV), which describes the expected state of mature vegetation in the absence of human intervention. We argue that it is impossible to model PNV because of (i) the methodological problems associated to its definition and (ii) the issues related to the ecosystems dynamics.We conclude that the approach to characterizing PNV is unrealistic and provides scenarios with limited predictive power. In places with a long-term human history, interpretations of PNV need ...

 

A comparison of landscape fuel treatment strategies to mitigate wildland fire risk in the urban interface and preserve old forest structure

  
Forest Ecology and Management, Vol. 259, No. 8. (31 March 2010), pp. 1556-1570, https://doi.org/10.1016/j.foreco.2010.01.032

Abstract

We simulated fuel reduction treatments on a 16,000 ha study area in Oregon, US, to examine tradeoffs between placing fuel treatments near residential structures within an urban interface, versus treating stands in the adjacent wildlands to meet forest health and ecological restoration goals. The treatment strategies were evaluated by simulating 10,000 wildfires with random ignition locations and calculating burn probabilities by 0.5 m flame length categories for each 30 m × 30 m pixel in the study area. The burn conditions for the wildfires were chosen to ...

 

Ecological stability of mixed-species forests

  
In Mixed-Species Forests (2017), pp. 337-382, https://doi.org/10.1007/978-3-662-54553-9_7

Abstract

In many parts of the world, forests are likely to face novel disturbance regimes as a result of global change processes, and there is concern that the capacity of forest ecosystems to withstand, recover from, or adapt to these novel disturbance regimes may decline. Creation and maintenance of species-diverse forests is seen as an important option to adapt forests to uncertain future disturbances. However, it is not known whether benefits of mixed-species forests consist mainly of risk spreading among tree species ...

 

How disturbance, competition and dispersal interact to prevent tree range boundaries from keeping pace with climate change

  
Global Change Biology (28 July 2017), https://doi.org/10.1111/gcb.13847

Abstract

Climate change is expected to cause geographic shifts in tree species’ ranges, but such shifts may not keep pace with climate changes because seed dispersal distances are often limited and competition-induced changes in community composition can be relatively slow. Disturbances may speed changes in community composition, but the interactions among climate change, disturbance and competitive interactions to produce range shifts are poorly understood. We used a physiologically-based mechanistic landscape model to study these interactions in the northeastern United States. We designed ...

 

Scientific opinion on the pest categorisation of Cryphonectria parasitica (Murrill) Barr

  
EFSA Journal, Vol. 12, No. 10. (1 October 2014), pp. n/a-n/a, https://doi.org/10.2903/j.efsa.2014.3859

Abstract

The European Commission requested the EFSA Panel on Plant Health to perform a pest categorisation of Cryphonectria parasitica (Murrill) Barr, the fungal pathogen responsible for chestnut blight, a highly destructive disease that kills trees through bark cankers. The pathogen is listed in Annex IIAII of Directive 2000/29/EC. Its identity is clearly defined as C.parasitica (Murrill) Barr and methods exist for its discriminative detection. Several hosts are known, but the main hosts are species of Castanea and Quercus, particularly C.sativa and Q.petraea. ...

References


  1. Adamcikova, K., Kobza, M., Juhasova, G., 2010. Characteristics of the Cryphonectria parasitica isolated from Quercus in Slovakia. Forest Pathology 40, 443–449.
  2. Adamcikova, K., Juhasova, G., Kobza, M., Ondruskova, E., 2013. Diversity of microfungi on branches of Castanea sativa in Slovakia. Polish Botanical Journal 58, 741–746.
  3. Aguín Casal, O., Montenegro Gregorio, D., Pérez Otero, R., Mansilla Vázquez, J.P., 2005. VI Congreso Forestal Español, Zaragoza 2005. Available online: http://www.efadip.org/es/publicaciones/Comunicaciones/2005/Cryphonectria%20parasitica(zaragoza).htm .
 

Climate-driven tree mortality: insights from the piñon pine die-off in the United States

  
New Phytologist, Vol. 200, No. 2. (October 2013), pp. 301-303, https://doi.org/10.1111/nph.12464

Abstract

The global climate is changing, and a range of negative effects on plants has already been observed and will likely continue into the future. One of the most apparent consequences of climate change is widespread tree mortality (Fig. 1). Extensive tree die-offs resulting from recent climate change have been documented across a range of forest types on all forested continents (Allen et al., 2010). The exact physiological mechanisms causing this mortality are not yet well understood (e.g. McDowell, 2011), but they ...

 

Bark thickness and fire regime

  
Functional Ecology, Vol. 29, No. 3. (1 March 2015), pp. 315-327, https://doi.org/10.1111/1365-2435.12372

Abstract

[::] Bark is a vital and very visible part of woody plants, yet only recently has bark characteristics started to be considered as key traits structuring communities and biomes. Bark thickness is very variable among woody plants, and I hypothesize that fire is a key factor selecting for a thick bark, and thus, at the global scale, a significant proportion of the variability in bark thickness is explained by the variability in fire regimes. Previous research has focused on the importance ...

 

Resprouting as a key functional trait: how buds, protection and resources drive persistence after fire

  
New Phytologist, Vol. 197, No. 1. (January 2013), pp. 19-35, https://doi.org/10.1111/nph.12001

Abstract

[Summary] Resprouting as a response to disturbance is now widely recognized as a key functional trait among woody plants and as the basis for the persistence niche. However, the underlying mechanisms that define resprouting responses to disturbance are poorly conceptualized. Resprouting ability is constrained by the interaction of the disturbance regime that depletes the buds and resources needed to fund resprouting, and the environment that drives growth and resource allocation. We develop a buds-protection-resources (BPR) framework for understanding resprouting in fire-prone ...

 

The lanky and the corky: fire-escape strategies in savanna woody species

  
Journal of Ecology, Vol. 101, No. 5. (1 September 2013), pp. 1265-1272, https://doi.org/10.1111/1365-2745.12118

Abstract

[::] Fire and herbivory are the main disturbances shaping the structure of savannas. In these ecosystems, the key strategies by which woody plants escape fire are either early height growth (the lanky strategy) or early bark growth (the corky strategy). We hypothesize that the dominance of each strategy in different savannas depends on the prevailing disturbance regimes. Given the importance of herbivory in afrotropical savanna, we expect woody plants in these savannas to be taller and have thinner barks (the lanky ...

 

Recurrent wildfires constrain long-term reproduction ability in Pinus halepensis Mill.

  
International Journal of Wildland Fire, Vol. 17, No. 5. (2008), 579, https://doi.org/10.1071/wf07078

Abstract

Increasing fire recurrence is a major problem threatening Mediterranean-type ecosystems. Moreover, this pattern is predicted to increase owing to global change. Although a reduction in the density and growth of post-fire regeneration is usually observed in recurrently burnt areas, the potential effects on reproductive ability have seldom been explored. The aim of the present study is to investigate whether structural changes induced by fire recurrence may constrain reproduction ability of Pinus halepensis forests. We conducted the current study in Catalonia (NE ...

 

Behavioral self-organization underlies the resilience of a coastal ecosystem

  
Proceedings of the National Academy of Sciences, Vol. 114, No. 30. (25 July 2017), pp. 8035-8040, https://doi.org/10.1073/pnas.1619203114

Abstract

[Significance] Theoretical models suggest that spatial self-organization enhances the resistance of ecosystems to disturbance. However, experiments investigating this important prediction are lacking. Our paper provides clear experimental evidence that spatial self-organization profoundly increases the ability of ecosystems to persist in the face of disturbance. The mechanisms underlying this positive impact of self-organization are driven by the combination of ecological and behavioral processes. Specifically, large-scale banded patterns in mussel beds created by ecological feedback processes facilitate fast behavioral aggregation of individual mussels into ...

 

Regular patterns link individual behavior to population persistence

  
Proceedings of the National Academy of Sciences, Vol. 114, No. 30. (25 July 2017), pp. 7747-7749, https://doi.org/10.1073/pnas.1709063114

Abstract

[Excerpt] Resisting and recovering from disturbances is a necessity for most species. The strategy is sometimes collective, depending on the aggregation of interacting individuals into regular patterns. However, relating patterns of abundance across scales to both individual behavior and population persistence remains a major challenge for ecology. Such patterns are found in many ecosystems, ranging from microbes to forests, with their regularity taking the form of evenly sized and spaced bands and patches of aggregated individuals. Regular patterns are said to ...

 

The importance of being modular

  
Science, Vol. 357, No. 6347. (14 July 2017), pp. 128-129, https://doi.org/10.1126/science.aan8075

Abstract

In the 1970s, ecologists began to speculate that modular systems—which are organized into blocks or modules—can better contain perturbations and are therefore more resilient against external damage. This simple concept can be applied to any networked system, be it an ecosystem, cellular metabolism, traffic flows, human disease contagion, a power grid, or an economy. However, experimental evidence has been lacking. On page 199 of this issue, Gilarranz et al. provide empirical evidence showing that modular networked systems do indeed have an ...

 

Effects of network modularity on the spread of perturbation impact in experimental metapopulations

  
Science, Vol. 357, No. 6347. (14 July 2017), pp. 199-201, https://doi.org/10.1126/science.aal4122

Abstract

[Modularity limits disturbance effects] The networks that form natural, social, and technological systems are vulnerable to the spreading impacts of perturbations. Theory predicts that networks with a clustered or modular structure—where nodes within a module interact more frequently than they do with nodes in other modules—might contain a perturbation, preventing it from spreading to the entire network. Gilarranz et al. conducted experiments with networked populations of springtail (Folsomia candida) microarthropods to show that modularity limits the impact of a local extinction on ...

 

Risk to plant health of Flavescence dorée for the EU territory

  
EFSA Journal, Vol. 14, No. 12. (December 2016), 4603, https://doi.org/10.2903/j.efsa.2016.4603

Abstract

Following a request from the European Commission, the EFSA Panel on Plant Health (PLH) performed a quantitative analysis of the risk posed by the Flavescence dorée phytoplasma (FDp) in the EU territory. Three scenarios were analysed, one with current measures in place (scenario A0), one designed to improve grapevine propagation material phytosanitary status (scenario A1) and one with reinforced eradication and containment (scenario A2). The potential for entry is limited, FDp being almost non-existent outside the EU. FDp and its major ...

References

  1. ACRP, 2013. VitisClim Modelling epidemiological and economic consequences of Grapevine Flavescence dorée phytoplasma to Austrian viticulture under a climate change scenario. Final Report, https://www.klimafonds.gv.at/assets/Uploads/Projektberichte/ACRP-2009/20150716VitisclimACRP2EBB060361.pdf .
  2. AGRI4CAST, online. Interpolated Meteorological Data. Available online: http://mars.jrc.ec.europa.eu/mars/About-us/AGRI4CAST/Data-distribution/AGRI4CAST-Interpolated-Meteorological-Data .
  3. Bagnoli, B., Gargani, E., 2011. Survey on Scaphoideus titanus egg distribution on grapevine. IOBC/WPRS Bulletin, 67, 233–237.
  4. Belli, G., Fortusini, A., Osler, R., 1978. Present knowledge on diseases of the
 

Pest categorisation of Ips typographus

  
EFSA Journal, Vol. 15, No. 7. (July 2017), 4881, https://doi.org/10.2903/j.efsa.2017.4881

Abstract

The Panel on Plant Health performed a pest categorisation of the eight-toothed spruce bark beetle, Ips typographus L. (Coleoptera: Curculionidae, Scolytinae), for the EU. I. typographus is a well-defined and distinguishable species, recognised mainly as a pest of spruce (Picea spp.) in Eurasia. It also attacks other conifers such as Abies spp., Larix spp., Pinus spp. and Pseudotsuga menziesii. Native to Eurasia, I. typographus has spread from the native range of spruce to new areas in Eurasia where spruce has been ...

References

  1. Anderbrant, O., 1990. Gallery construction and oviposition of the bark beetle Ips typographus (Coleoptera: Scolytidae) at different breeding densities. Ecological Entomology 15, 1–8.
  2. Bakke, A., 1970. Evidence of a population aggregating pheromone in Ips typographus (Coleoptera: Scolytidae). Contributions from Boyce Thompson Institute 24, 309–310.
  3. Bakke, A., 1976. Spruce bark beetle, Ips typographus: pheromone production and field response to synthetic pheromones. Naturwissenschaften 63, 92–92.
  4. Bakke, A., 1989. The recent
 

Pest categorisation of Dendroctonus micans

  
EFSA Journal, Vol. 15, No. 7. (July 2017), 4880, https://doi.org/10.2903/j.efsa.2017.4880

Abstract

The Panel on Plant Health performed a pest categorisation of the great spruce bark beetle, Dendroctonus micans (Kugelann), (Coleoptera: Curculionidae, Scolytinae), for the EU. D. micans is a well-defined and distinguishable species, recognised mainly as a pest of spruce (Picea spp.) and pine (Pinus spp.) in Eurasia. Attacks on other conifers (Abies spp., Larix decidua, Pseudotsuga menziesii) are also reported. Supposedly originating from north-eastern Eurasia, D. micans has spread westward and is now distributed throughout the EU (22 Member States). It ...

References

  1. Akinci, H.A., Ozcan, G.E., Eroglu, M., 2009. Impacts of site effects on losses of oriental spruce during Dendroctonus micans (Kug.) outbreaks in Turkey. African Journal of Biotechnology 8, 3934–3939. https://www.ajol.info/index.php/ajb/article/view/62085 .
  2. Balachowsky, A., 1949. Faune de France. 50. Coleoptères Scolytides. Lechevalier, Paris, 320 pp.
  3. Bergmiller, F., 1903. Dendroctonus micans und Rhizophagus grandis. Zentralblatt für das gesamte Forstwesen, 29, 252–256.
  4. Bevan, D., King, C.J., 1983. Dendroctonus micans
 

Forest disturbances under climate change

  
Nature Climate Change, Vol. 7, No. 6. (31 May 2017), pp. 395-402, https://doi.org/10.1038/nclimate3303

Abstract

Forest disturbances are sensitive to climate. However, our understanding of disturbance dynamics in response to climatic changes remains incomplete, particularly regarding large-scale patterns, interaction effects and dampening feedbacks. Here we provide a global synthesis of climate change effects on important abiotic (fire, drought, wind, snow and ice) and biotic (insects and pathogens) disturbance agents. Warmer and drier conditions particularly facilitate fire, drought and insect disturbances, while warmer and wetter conditions increase disturbances from wind and pathogens. Widespread interactions between agents are ...

 

Tree diversity reduces pest damage in mature forests across Europe

  
Biology Letters, Vol. 12, No. 4. (27 April 2016), 20151037, https://doi.org/10.1098/rsbl.2015.1037

Abstract

Forest pest damage is expected to increase with global change. Tree diversity could mitigate this impact, but unambiguous demonstration of the diversity–resistance relationship is lacking in semi-natural mature forests. We used a network of 208 forest plots sampled along two orthogonal gradients of increasing tree species richness and latitudes to assess total tree defoliation in Europe. We found a positive relationship between tree species richness and resistance to insect herbivores: overall damage to broadleaved species significantly decreased with the number of ...

 

Risk of post-fire metal mobilization into surface water resources: a review

  
Science of The Total Environment, Vol. 599-600 (December 2017), pp. 1740-1755, https://doi.org/10.1016/j.scitotenv.2017.05.096

Abstract

[Highlights] [::] Forest catchment supply high quality water to a number of communities around the world. [::] Forest fire release sequestered metals from soil organic matter and vegetation. [::] Post-fire erosion rapidly transports these metals to downstream soil and water bodies. [::] Their deposition in the water bodies affects the water quality and aquatic biota. [::] This metal contamination may reach to human being as a consumer. [Abstract] One of the significant economic benefits to communities around the world of having pristine forest catchments is the supply of ...

 

At the nexus of fire, water and society

  
Philosophical Transactions of the Royal Society B: Biological Sciences, Vol. 371, No. 1696. (23 May 2016), 20150172, https://doi.org/10.1098/rstb.2015.0172

Abstract

The societal risks of water scarcity and water-quality impairment have received considerable attention, evidenced by recent analyses of these topics by the 2030 Water Resources Group, the United Nations and the World Economic Forum. What are the effects of fire on the predicted water scarcity and declines in water quality? Drinking water supplies for humans, the emphasis of this exploration, are derived from several land cover types, including forests, grasslands and peatlands, which are vulnerable to fire. In the last two ...

 

A global index for mapping the exposure of water resources to wildfire

  
Forests, Vol. 7, No. 1. (13 January 2016), 22, https://doi.org/10.3390/f7010022

Abstract

Wildfires are keystone components of natural disturbance regimes that maintain ecosystem structure and functions, such as the hydrological cycle, in many parts of the world. Consequently, critical surface freshwater resources can be exposed to post-fire effects disrupting their quantity, quality and regularity. Although well studied at the local scale, the potential extent of these effects has not been examined at the global scale. We take the first step toward a global assessment of the wildfire water risk (WWR) by presenting a ...

 

Effects of habitat disturbance on tropical forest biodiversity

  
Proceedings of the National Academy of Sciences, Vol. 114, No. 23. (06 June 2017), pp. 6056-6061, https://doi.org/10.1073/pnas.1611855114

Abstract

[Significance] Biologists believe that a major mass extinction is happening in the tropics. Destruction of forests is a key reason. However, there are no solid predictions of the percentage of species that will go extinct as more and more forests are disturbed. This paper provides estimates based on extrapolating the respective numbers of species in disturbed and undisturbed habitats. It uses a large global database of species inventories at particular sites. Trees and 10 groups of animals are analyzed. All the disturbed ...

 

Can the use of continuous cover forestry alone maintain silver fir (Abies alba Mill.) in central European mountain forests?

  
Forestry, Vol. 89, No. 4. (August 2016), pp. 412-421, https://doi.org/10.1093/forestry/cpw013

Abstract

Chronic browsing and inappropriate stand management are often discussed as causes for recruitment failure of tree species in temperate mixed uneven-aged forests. Continuous cover forestry is thought to produce conditions that are conducive to the recruitment of native shade-tolerant and browse-sensitive tree species such as silver fir (Abies alba Mill.). This study used density-dependent matrix population models parameterized for three main types of fir forests in Europe (53 048 measured trees from 3183 permanent sample plots) to project the effects of ...

 

Managing alpine forests in a changing climate

  
In Management Strategies to Adapt Alpine Space Forests to Climate Change Risks (28 August 2013), pp. 369-383, https://doi.org/10.5772/56272
edited by Gillian Cerbu

Abstract

[Excerpt: Introduction] There is mounting evidence that Alpine forest ecosystems will not be able to fully absorb the changes in site factors associated with climate change, such as higher temperatures, more intensive drought stress and associated biotic impacts since these changes exceed the adaptive capacity of the trees. The projected changes in temperature by 2.2 to 5.1 K from 1980 to 1999 to 2080 to 2099, for the A1B scenario in southern Europe [1], correspond to an altitudinal shift of 300 to ...

Visual summary

 

Competition theory, evolution, and the concept of an ecological niche

  
Acta Biotheoretica, Vol. 31, No. 3. (1982), pp. 165-179, https://doi.org/10.1007/bf01857239

Abstract

This article examines some of the main tenets of competition theory in light of the theory of evolution and the concept of an ecological niche. The principle of competitive exclusion and the related assumption that communities exist at competitive equilibrium - fundamental parts of many competition theories and models - may be violated if non-equilibrium conditions exist in natural communities or are incorporated into competition models. Furthermore, these two basic tenets of competition theory are not compatible with the theory of ...

 

Spatial vegetation patterns and imminent desertification in Mediterranean arid ecosystems

  
Nature, Vol. 449, No. 7159. (13 September 2007), pp. 213-217, https://doi.org/10.1038/nature06111

Abstract

Humans and climate affect ecosystems and their services1, which may involve continuous and discontinuous transitions from one stable state to another2. Discontinuous transitions are abrupt, irreversible and among the most catastrophic changes of ecosystems identified1. For terrestrial ecosystems, it has been hypothesized that vegetation patchiness could be used as a signature of imminent transitions3, 4. Here, we analyse how vegetation patchiness changes in arid ecosystems with different grazing pressures, using both field data and a modelling approach. In the modelling approach, ...

 

Quaternary history and the stability of forest communities

  
In Forest Succession (1981), pp. 132-153, https://doi.org/10.1007/978-1-4612-5950-3_10

Abstract

The concept of stability of plant communities inevitably enters discussions of forest succession. Succession following disturbance often leads to restoration of the original community, which is seen as the equilibrium community for the site. In this context, succession can be viewed as a mechanism maintaining stability. ...

 

Adaptation, migration or extirpation: climate change outcomes for tree populations

  
Evolutionary Applications, Vol. 1, No. 1. (1 February 2008), pp. 95-111, https://doi.org/10.1111/j.1752-4571.2007.00013.x

Abstract

Species distribution models predict a wholesale redistribution of trees in the next century, yet migratory responses necessary to spatially track climates far exceed maximum post-glacial rates. The extent to which populations will adapt will depend upon phenotypic variation, strength of selection, fecundity, interspecific competition, and biotic interactions. Populations of temperate and boreal trees show moderate to strong clines in phenology and growth along temperature gradients, indicating substantial local adaptation. Traits involved in local adaptation appear to be the product of small ...

 

Landscape - wildfire interactions in southern Europe: Implications for landscape management

  
Journal of Environmental Management, Vol. 92, No. 10. (October 2011), pp. 2389-2402, https://doi.org/10.1016/j.jenvman.2011.06.028

Abstract

[Abstract] Every year approximately half a million hectares of land are burned by wildfires in southern Europe, causing large ecological and socio-economic impacts. Climate and land use changes in the last decades have increased fire risk and danger. In this paper we review the available scientific knowledge on the relationships between landscape and wildfires in the Mediterranean region, with a focus on its application for defining landscape management guidelines and policies that could be adopted in order to promote landscapes with ...

 

Sequential disturbance effects of hailstorm and fire on vegetation in a Mediterranean-type ecosystem

  
Ecosystems, Vol. 18, No. 7. (2015), pp. 1121-1134, https://doi.org/10.1007/s10021-015-9886-5

Abstract

Frequency and intensity of disturbance is projected to increase for many ecosystems globally, with uncertain consequences, particularly when disturbances occur in rapid succession. We quantified community response (52 shrub species and the tree Eucalyptus todtiana) to a severe hailstorm followed 2 months later by prescribed fire for a Mediterranean-type shrubland in southwestern Australia. Partial overlap of hailstorm path and fire perimeter provided a unique opportunity to compare storm and fire effects along a storm severity gradient (high–moderate–none) with and without fire. ...

 

The status of our scientific understanding of lodgepole pine and mountain pine beetles - A focus on forest ecology and fire behavior

  
Global Fire Initiative technical report, Vol. 2008, No. 2. (2008), pp. 1-13

Abstract

A synthesis of our current knowledge about the effects of the mountain pine beetle epidemic on lodgepole pine forests and fire behavior, with a geographic focus on Colorado and southern Wyoming. [Excerpt: Implications for future forests] Models for predicting future climates have progressed dramatically in recent years, but their accuracy is questionable for planning purposes, particularly at local levels. Nonetheless, model predictions suggest significant alterations in climate from past observed patterns. These predictions are supported by recent climate events that themselves had largely been predicted several years ago. Therefore, the potential ...

 

Vegetation response to a short interval between high-severity wildfires in a mixed-evergreen forest

  
Journal of Ecology, Vol. 97, No. 1. (January 2009), pp. 142-154, https://doi.org/10.1111/j.1365-2745.2008.01456.x

Abstract

[::] Variations in disturbance regime strongly influence ecosystem structure and function. A prominent form of such variation is when multiple high-severity wildfires occur in rapid succession (i.e. short-interval (SI) severe fires, or ‘re-burns’). These events have been proposed as key mechanisms altering successional rates and pathways. [::] We utilized a natural experiment afforded by two overlapping wildfires occurring within a 15-year interval in forests of the Klamath–Siskiyou Mountains, Oregon (USA). We tested for unique effects of a SI fire (15-year interval before ...

 

Unraveling the drivers of intensifying forest disturbance regimes in Europe

  
Global Change Biology, Vol. 17, No. 9. (September 2011), pp. 2842-2852, https://doi.org/10.1111/j.1365-2486.2011.02452.x

Abstract

Natural disturbances like wildfire, windthrow and insect outbreaks are critical drivers of composition, structure and functioning of forest ecosystems. They are strongly climate-sensitive, and are thus likely to be distinctly affected by climatic changes. Observations across Europe show that in recent decades, forest disturbance regimes have intensified markedly, resulting in a strong increase in damage from wind, bark beetles and wildfires. Climate change is frequently hypothesized as the main driving force behind this intensification, but changes in forest structure and composition ...

 

Interactions of landscape disturbances and climate change dictate ecological pattern and process: spatial modeling of wildfire, insect, and disease dynamics under future climates

  
Landscape Ecology (2016), pp. 1-13, https://doi.org/10.1007/s10980-016-0414-6

Abstract

[Context] Interactions among disturbances, climate, and vegetation influence landscape patterns and ecosystem processes. Climate changes, exotic invasions, beetle outbreaks, altered fire regimes, and human activities may interact to produce landscapes that appear and function beyond historical analogs. [Objectives] We used the mechanistic ecosystem-fire process model FireBGCv2 to model interactions of wildland fire, mountain pine beetle (Dendroctonus ponderosae), and white pine blister rust (Cronartium ribicola) under current and future climates, across three diverse study areas. [Methods] We assessed changes in tree basal area as a measure of ...

 

Forest fires in Europe, Middle East and North Africa 2015

  

Abstract

This is the 16th issue of the EFFIS annual report on forest fires for the year 2015. This report is consolidated as highly appreciated documentation of the previous year's forest fires in Europe, Middle East and North Africa. In its different sections, the report includes information on the evolution of fire danger in the European and Mediterranean regions, the damage caused by fires and detailed description of the fire conditions during the 2015 fire campaign in the majority of countries in the EFFIS network The chapter ...

 

Harmonized classification scheme of fire causes in the EU adopted for the European Fire Database of EFFIS

  

Abstract

The information on the causes of forest fires is of paramount importance to support the environmental and civil protection policies and design appropriate prevention measure. At the European level a simple common scheme with 4 fire causes classes (deliberate, accident/negligence, natural and unknown) has been used to record information on fire causes since 1992. European countries use national schemes which in most cases are much more detailed than the simple 4 common classes, but they are not harmonized and detailed cross ...

 

Changing the resilience paradigm

  
Nature Climate Change, Vol. 4, No. 6. (28 May 2014), pp. 407-409, https://doi.org/10.1038/nclimate2227

Abstract

Resilience management goes beyond risk management to address the complexities of large integrated systems and the uncertainty of future threats, especially those associated with climate change. [Excerpt] In summary, risk analysis and risk management based on probabilistic quantitative methods have been widely adopted and have been useful for dealing with foreseeable and calculable stress situations. Benchmarks and thresholds for risk analysis are built into the regulations and policies of organizations and nations; however, this approach is no longer sufficient to address the ...

 

Natural hazards monitoring: forest fires, droughts and floods - The example of European pilot projects

  
Surveys in Geophysics, Vol. 21, No. 2-3. (2000), pp. 291-305, https://doi.org/10.1023/a%3a1006750412500

Abstract

This paper reviews the subject of natural hazards and the use of existing remote sensing systems in the different phases of disaster management for some specific natural hazards: forest fires, droughts and floods. It centers on the applicability of remote sensing for increasing preparedness, providing early warnings, monitoring the hazards in real time, and assessing the damage so that relief can be provided. Comparison of the information provided by existing systems and that needed for operational use of remote sensing in ...

 

Development of a framework for fire risk assessment using remote sensing and geographic information system technologies

  
Ecological Modelling, Vol. 221, No. 1. (10 January 2010), pp. 46-58, https://doi.org/10.1016/j.ecolmodel.2008.11.017

Abstract

Forest fires play a critical role in landscape transformation, vegetation succession, soil degradation and air quality. Improvements in fire risk estimation are vital to reduce the negative impacts of fire, either by lessen burn severity or intensity through fuel management, or by aiding the natural vegetation recovery using post-fire treatments. This paper presents the methods to generate the input variables and the risk integration developed within the Firemap project (funded under the Spanish Ministry of Science and Technology) to map wildland ...

 

The Australian flammability monitoring system

  
In Brisbane 2016: annual conference (2016)

Abstract

Live fuel moisture content (LFMC) is one of the primary variables affecting bushfire flammability. We have developed the first Australia-wide flammability monitoring system for operational prediction of LFMC and flammability using satellite data. [Excerpt: Conclusion and future work] [::] We developed the prototype of the first Australia-wide Flammability Monitoring System for operational prediction of LFMC and flammability using satellite observations. [::] LFMC is not the only variable that is related to fire occurrence, and therefore the importance of other factors (e.g. fire weather and ...

 

Curbing an onslaught of 2 billion cars

  
(2016)

Abstract

Nature could soon be imperiled by twice as many vehicles and enough new roads to encircle the planet more than 600 times. [Excerpt] By 2010, our planet had reached a remarkable milestone: one billion cars—or, to be precise, one billion motorized vehicles, including cars, trucks, buses, and motorcycles but excluding off-road vehicles such as tractors and bulldozers. Of course, the overwhelming majority of these vehicles are powered by fossil fuels. And if that figure isn’t troubling enough, by 2030, it’s projected that ...

 

Anthropogenic disturbance and tree diversity in Montane Rain Forests in Chiapas, Mexico

  
Forest Ecology and Management, Vol. 154, No. 1-2. (15 November 2001), pp. 311-326, https://doi.org/10.1016/s0378-1127(00)00639-3

Abstract

We studied the influence of anthropogenic disturbance on forest structure and composition in the highly populated Montane Rain Forests of northern Chiapas, Mexico. We evaluated species richness, basal area and stem density on 81 circular plots (0.1 ha each) along a categorical disturbance gradient due to forest extraction, livestock grazing, and fires. A total of 116 tree species (>5 cm DBH) were recorded in three major forest types recognized by TWINSPAN. The three forest types were: Quercus–Podocarpus Forest (QPF), Pinus–Quercus–Liquidambar Forest (PQLF), and ...

 

Forest-landscape structure mediates effects of a spruce bark beetle (Dendroctonus rufipennis) outbreak on subsequent likelihood of burning in Alaskan boreal forest

  
Forest Ecology and Management, Vol. 369 (June 2016), pp. 38-46, https://doi.org/10.1016/j.foreco.2016.03.036

Abstract

[Highlights] [::] We measured forest-landscape structure effects on disturbance patterns in Alaska. [::] Disturbance patterns and interactions were related to tree-species composition. [::] Bark beetles lead to increased probability of fire in mixed-spruce stands. [::] Results can inform management of disturbance in Alaska with climate change. [Abstract] Characterizing how variation in forest landscape structure shapes patterns of natural disturbances and mediates interactions between multiple disturbances is critical for anticipating ecological consequences of climate change in high-latitude forest ecosystems. During the 1990s, a massive spruce bark beetle (Dendroctonus ...

 

Fine-scale spruce mortality dynamics driven by bark beetle disturbance in Babia Góra National Park, Poland

  
European Journal of Forest Research, Vol. 135, No. 3. (2016), pp. 507-517, https://doi.org/10.1007/s10342-016-0949-8

Abstract

Bark beetle outbreaks have had major impacts on Norway spruce forests in Europe. The large majority of these forests are located in areas under forest management; thus, few studies have investigated outbreak-driven spruce mortality patterns unaffected by humans. Our study examined spruce mortality resultant from a beetle outbreak in a high-elevation, unmanaged forest over a 17-year span. We analyzed three tree-level survivorship and DBH datasets collected during pre-, mid-, and post-outbreak conditions to evaluate long-term mortality dynamics. We measured changes in ...

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