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Quantifying the sources of epistemic uncertainty in model predictions of insect disturbances in an uncertain climate / David R. Gray in Annals of Forest Science, vol 74 n° 3 (September 2017)
[article]
Titre : Quantifying the sources of epistemic uncertainty in model predictions of insect disturbances in an uncertain climate Type de document : Article/Communication Auteurs : David R. Gray, Auteur Année de publication : 2017 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] insecte nuisible
[Termes IGN] modèle conceptuel de données
[Termes IGN] modèle d'incertitude
[Termes IGN] prédiction
[Termes IGN] variation saisonnière
[Vedettes matières IGN] Ecologie forestièreRésumé : (Auteur) Key message : Natural disturbance can disrupt the anticipated delivery of forest-related ecosystem goods and services. Model predictions of natural disturbances have substantial uncertainties arising from the choices of input data and spatial scale used in the model building process, and the uncertainty of future climate conditions which are a major driver of disturbances. Quantifying the multiple contributions to uncertainty will aid decision making and guide future research needs.
Context : Forest management planning has been able, in the past, to rely on substantial empirical evidence regarding tree growth, succession, frequency and impacts of natural disturbances to estimate the future delivery of goods and services. Uncertainty has not been thought large enough to warrant consideration. Our rapidly changing climate is casting that empirical knowledge in doubt.
Aims : This paper describes how models of future spruce budworm outbreaks are plagued by uncertainty contributed by (among others): selection of data used in the model building process; model error; and uncertainty of the future climate and forest that will drive the future insect outbreak. The contribution of each to the total uncertainty will be quantified.
Methods : Outbreak models are built by the multivariate technique of reduced rank regression using different datasets. Each model and an estimate of its error are then used to predict future outbreaks under different future conditions of climate and forest composition. Variation in predictions is calculated, and the variance is apportioned among the model components that contributed to the epistemic uncertainty in predictions.
Results : Projections of future outbreaks are highly uncertain under the range of input data and future conditions examined. Uncertainty is not uniformly distributed spatially; the average 75% confidence interval for outbreak duration is 10 years. Estimates of forest inventory for model building and choice of climate scenario for projections of future climate had the greatest contributions to predictions of outbreak duration and severity.
Conclusion : Predictions of future spruce budworm outbreaks are highly uncertain. More precise outbreak data with which to build a new outbreak model will have the biggest impact on reducing uncertainty. However, an uncertain future climate will continue to produce uncertainty in outbreak projections. Forest management strategies must, therefore, include alternatives that present a reasonable likelihood of achieving acceptable outcomes over a wide range of future conditions.Numéro de notice : A2017-356 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1007/s13595-017-0645-y Date de publication en ligne : 21/06/2017 En ligne : https://doi.org/10.1007/s13595-017-0645-y Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=85723
in Annals of Forest Science > vol 74 n° 3 (September 2017)[article]Cork oak pests: a review of insect damage and management / Riziero Tiberi in Annals of Forest Science, vol 73 n° 2 (June 2016)
[article]
Titre : Cork oak pests: a review of insect damage and management Type de document : Article/Communication Auteurs : Riziero Tiberi, Auteur ; Manuela Branco, Auteur ; Matteo Bracalini, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 219 - 232 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] changement climatique
[Termes IGN] insecte nuisible
[Termes IGN] politique de conservation (biodiversité)
[Termes IGN] Quercus suber
[Termes IGN] risque naturel
[Termes IGN] surveillance écologique
[Termes IGN] sylviculture
[Vedettes matières IGN] Végétation et changement climatiqueRésumé : (auteur) Key message : Cork oak decline is widespread in all its distribution range and seems to be triggered mainly by both mismanagement and unfavorable climatic factors. As a result, cork oak forests become susceptible to pest attack, which accelerates the onset of decline. Pest management strategies for this valuable and highly biodiverse ecosystem are examined in this review, taking into account the main insect pests and how their impact on cork oak forests is affected by climate change. While monitoring pests may provide the tools to predict the transition from endemic to epidemic insect populations, forestry practices (sanitary felling), biological control, and trapping are some of the most promising measures in protecting cork oak forests.
Context : Over the last decades, cork oak (Quercus suber L.) decline has affected millions of trees throughout its distribution range. Cork oak is a typically Mediterranean species remarkably relevant for the biodiversity and landscape conservation of vast evergreen oak forests. Cork oak is also well known and highly valued for cork production. Climatic changes, management practices, and biotic factors, particularly plant pathogens and insect pests, play a decisive role in tree death and market devaluation of cork.
Aims : Here, we review the major insect pests possibly involved in cork oak decline, while discussing pest management strategies.
Methods : A survey of the current literature was performed to identify major insect pests affecting cork oak trees, as well as to establish the most promising pest management strategies under climate change.
Results: Many authors seem to agree that the decline is triggered by both anthropogenic and abiotic factors, such as the mismanagement of cork oak forests and unfavorable climate (high temperatures and droughts). Consequently, trees become susceptible to pests and pathogens, which accelerate the onset of decline.
Conclusion : Since a further increase in temperatures and droughts is expected, developing adequate management strategies to adapt cork oak trees to climate change, while simultaneously preventing and reducing insect pest attacks, is of foremost importance in the effort to conserve these unique and highly diverse ecosystems.Numéro de notice : A2016-348 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1007/s13595-015-0534-1 Date de publication en ligne : 20/01/2016 En ligne : https://doi.org/10.1007/s13595-015-0534-1 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81058
in Annals of Forest Science > vol 73 n° 2 (June 2016) . - pp 219 - 232[article]How web services Apples and insects / Haikou Wang in GEO: Geoconnexion international, vol 15 n° 5 (May 2016)
[article]
Titre : How web services Apples and insects Type de document : Article/Communication Auteurs : Haikou Wang, Auteur Année de publication : 2016 Article en page(s) : pp 26 - 28 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] chaleur
[Termes IGN] géopositionnement
[Termes IGN] insecte nuisible
[Termes IGN] tabletteRésumé : (éditeur) For 40 years, the Australian plague locust commission has adopted new technology as it has become available. But would Apple’s IPAD prove a good surveying tool in 40ºc heat and in the middle of inland Australia? Haikou Wang reports on the results of his tests. Numéro de notice : A2016-196 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80631
in GEO: Geoconnexion international > vol 15 n° 5 (May 2016) . - pp 26 - 28[article]Landscape connectivity and insect herbivory: A framework for understanding tradeoffs among ecosystem services / Dorothy Y. Maguire in Global ecology and conservation, vol 4 (July 2015)
[article]
Titre : Landscape connectivity and insect herbivory: A framework for understanding tradeoffs among ecosystem services Type de document : Article/Communication Auteurs : Dorothy Y. Maguire, Auteur ; Patrick M.A. James, Auteur ; Christopher M. Buddle, Auteur ; Elena M. Bennett, Auteur Année de publication : 2015 Article en page(s) : pp 73 - 84 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] connexité (topologie)
[Termes IGN] corridor biologique
[Termes IGN] insecte nuisible
[Termes IGN] protection de l'environnement
[Termes IGN] service écosystémique
[Vedettes matières IGN] Ecologie forestièreRésumé : (auteur) Current theory suggests that ecosystem services in fragmented landscapes can be maintained by preserving connectivity of remaining habitat patches. However connectivity does not always influence services positively. For example, outbreaks of destructive insect herbivores can be facilitated by connectivity among forest patches. Understanding the positive and negative effects of connectivity on ecosystem processes is needed to help scientists and managers anticipate tradeoffs among services that result from forest fragmentation or restoration. In this paper we use a vote counting meta-analytic approach in combination with a literature survey to explore how connectivity affects ecosystem service provisioning using insect herbivory as a model process. Our results indicate that landscape connectivity affects herbivory in diverse ways, and that implications for services depend on whether we consider outbreaking species. Under non-outbreak conditions, herbivory positively affects services such as timber production, soil formation, and recreation by stimulating tree growth and enhancing soil productivity, but under outbreak conditions, herbivory negatively affects services by reducing timber yields and the aesthetic value of forests. We present a framework that shows herbivory is an important mechanism through which connectivity affects ecosystem services. Using case studies we demonstrate the applicability of the framework to management of two forest insect pests: the mountain pine beetle and forest tent caterpillar. Numéro de notice : A2015--046 Affiliation des auteurs : non IGN Thématique : BIODIVERSITE/FORET Nature : Article DOI : 10.1016/j.gecco.2015.05.006 En ligne : http://dx.doi.org/10.1016/j.gecco.2015.05.006 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=82113
in Global ecology and conservation > vol 4 (July 2015) . - pp 73 - 84[article]Spectroscopic analysis of green, desiccated and dead tamarisk canopies / Ran Meng in Photogrammetric Engineering & Remote Sensing, PERS, vol 81 n° 3 (March 2015)
[article]
Titre : Spectroscopic analysis of green, desiccated and dead tamarisk canopies Type de document : Article/Communication Auteurs : Ran Meng, Auteur ; Philip E. Dennison, Auteur Année de publication : 2015 Article en page(s) : pp 199 - 207 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] bande infrarouge
[Termes IGN] bande rouge
[Termes IGN] bande spectrale
[Termes IGN] insecte nuisible
[Termes IGN] rayonnement proche infrarouge
[Termes IGN] réflectance végétale
[Termes IGN] risque naturel
[Termes IGN] Tamarix (genre)Résumé : (auteur) Defoliation by the northern tamarisk beetle (Diorhabda carinulata) causes changes in the reflectance of tamarisk (Tamarix spp.) canopies. Cross correlogram spectral matching was used to examine spectral separability of green, yellow desiccated, brown desiccated, and dead tamarisk canopy types. Using a feature selection technique (the instability index), four spectral regions were identified as important for canopy type discrimination, including one red (645-693 nm), one near infrared (735-946 nm), and two shortwave infrared regions (1,960-2,090 nm and 2,400-2,478 nm). The random forests decision tree algorithm was used to compare classification performances of full-range and feature-selected hyperspectral spectra as well as simulated WorldView-2 spectra. Classification results indicated that the process of feature selection can reduce data redundancy and computation time while improving accuracy of tamarisk canopy type classification. Numéro de notice : A2015-969 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : 10.14358/PERS.81.3.199-207 En ligne : https://doi.org/10.14358/PERS.81.3.199-207 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80027
in Photogrammetric Engineering & Remote Sensing, PERS > vol 81 n° 3 (March 2015) . - pp 199 - 207[article]Effect of host tree density and apparency on the probability of attack by the pine processionary moth / Margot Regolini in Forest ecology and management, vol 334 ([15/12/2014])PermalinkLutte engagée contre le dendroctone de l'épicéa / Abdel Moutaoukil in Le Bois International : l'officiel du bois [édition verte], vol 2010 n° 3 (23 janvier 2010)PermalinkIps duplicatus (Coleoptera, Curculionidae, Scolytinae) - un daunator important al molidului din afara arealului natural de vegetatie / Nicolai Olenici ; Mihai-Leonard Duduman ; Cezar Tulbure ; Cristian Rotariu in Revista Padurilor, vol 124 n° 1 (1/2009)PermalinkLes longicornes asiatiques / Fabien Caroulle in Forêts de France, n° 516 (septembre 2008)PermalinkLe typographe / Louis-Michel Nageleisen in Forêts de France, n° 515 (juillet - août 2008)PermalinkPuceron lanigère : comment stopper sa progression ? / Pascal Charoy in Le Bois International : l'officiel du bois [édition verte], vol 2008 n° 23 (21 juin 2008)PermalinkLe risque sanitaire dans les forêts mélangées / Hervé Jactel in Revue forestière française, vol 60 n° 2 (mars - avril 2008)PermalinkLe ver du liège (Coroebus undatus Fabr.) / Renaud Piazzetta in Info Liège, n° 13 (automne-hiver 2006)PermalinkEffects of drought and heat on forest insect populations in relation to the 2003 drought in Western Europe / Gaëlle Rouault in Annals of Forest Science, Vol 63 n° 6 (september 2006)Permalink