Download or read book Working Paper Monitoring Tree level Insect Population Dynamics with Multi scale and Multi source Remote Sensing written by Michael A. Wulder and published by . This book was released on 2008 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-term monitoring of the rate of change of mountain pine beetle (Dendroctonus ponderosae Hopkins) populations requires detailed tree-level information over large areas. This information is used to assess the status of an infestation (e.g., increasing, stable, or decreasing), and to select and evaluate mitigation approaches. In this research project, the authors develop and demonstrate a prototype monitoring system, which enables the extrapolation of tree-level estimates of beetle damage from field data to a larger study area using a double sampling approach, and multi-scale, multi-source, high spatial resolution remotely sensed data. The project study area encompasses over 6 million ha and is located at the leading edge of an ongoing mountain pine beetle epidemic along the provincial border between British Columbia and Alberta, within the Dawson Creek Timber Supply Area (TSA) of British Columbia and the Northwest Boreal Forest Management Unit in Alberta.--Document.
Download or read book Monitoring Tree level Insect Population Dynamics with Multi scale and Multi source Remote Sensing written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Information Forestry written by and published by . This book was released on 2009-04 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forest Insect Population Dynamics Outbreaks And Global Warming Effects written by A. S. Isaev and published by John Wiley & Sons. This book was released on 2017-03-16 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new approach to insect modeling discusses population dynamics' regularities, control theory, theory of transitions, and describes methods of population dynamics and outbreaks modeling for forest phyllophagous insects and their effects on global climate change. Research in insect population dynamics is important for more reasons than just protecting forest communities. Insect populations are among the main ecological units included in the analysis of stability of ecological systems. Moreover, it is convenient to test new methods of analyzing population and community stability on the insect-related data, as by now ecologists and entomologists have accumulated large amounts of such data. In this book, the authors analyze population dynamics of quite a narrow group of insects – forest defoliators. It is hoped that the methods proposed herein for the analysis of population dynamics of these species may be useful and effective for analyzing population dynamics of other animal species and their effects and role in global warming. What can insects tell us about our environment and our ever-changing climate? It is through studies like this one that these important answers can be obtained, along with data on the insects and their behaviors themselves. The authors present new theories on modeling and data accumulation, using cutting-edge processes never before published for such a wide audience. This volume presents the state-of-the-art in the science, and it is an essential piece of any entomologist's and forest engineer's library.
Download or read book Remote Sensing and Machine Learning for Multi scale Ecosystem Monitoring written by Marvin Ludwig and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forest Insect Population Dynamics written by and published by . This book was released on 1969 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Remote Sensing in Forest Health Protection written by William M. Ciesla and published by . This book was released on 2000 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Remote Sensing Monitoring and Ecological Modeling of Insect Outbreak Dynamics in the Southern Rocky Mountains Ecoregion written by Lu Liang and published by . This book was released on 2015 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mountain pine beetle (Dendroctonus ponderosae; MPB) population has existed at endemic levels in the pine forests of western North America for centuries, but in recent decades it grew to epidemic levels and outbroke over extensive areas from British Columba in Canada to New Mexico in the United States. The current MPB outbreaks have impacted large expanses of lodgepole and ponderosa pine forests, reduced their ability to act as carbon sinks, altered wildfire hazards, affected wildlife populations, changed regional climate, modified local surface energy balance and water quality. Those effects are predicted to increase as a consequence of the direct and indirect effects of climate changes. Despite severe impacts of MPB, substantial unknowns and uncertainties still exist about its historical and current spatial-temporal patterns, future potential distributions, disturbance regime characteristics, ways of interaction with other major disturbance events, and impacts on forest resilience mechanisms. In this dissertation, I first explored the potential of medium resolution satellite imagery in mapping the chronic insect disturbance in the Southern Rocky Mountains Ecoregion. A forest-growth trend analysis method that integrates temporal trajectories in Landsat images and decision tree techniques was introduced to derive annual forest disturbance maps over a period of one decade. This workflow is able to capture the disturbance events as represented by spectral-temporal segments after the removal of observational noises from temporal trajectories in Landsat images, and efficiently recognizes and attributes events based on the characteristics of the segments. Higher overall accuracy (OA) was achieved when compared with the traditional single-date classifications, and a smaller number of training sample units is required compared with maximum likelihood and random forest classifiers. To test the feasibility of the trajectory-based approach at broader scales, I advanced this method by replacing the decision tree based semi-automatic event labeling procedure with an automatic attribution step via random forest, which was run on a set of segment features containing information on spatial-temporal neighborhoods. Meanwhile, I developed a new sampling strategy that intensively selects sample units in overlapping areas among images acquired from adjacent rows, and automatically adds spectrally dissimilarity sample units from non-overlapping areas, to improve the efficiency of representative sample selection at the ecoregion scale. The mean OA for all scenes was 82%. The satellite derived multi-temporal landscape quantification results revealed that MPB accounted for 70% of the total area of disturbance. I found that whether fire and MPB are linked disturbances depended on their occurring sequences. Fire severity was largely unrelated to pre-fire MPB outbreak severity, whereas post-fire beetle severity was shown to decrease with fire severity. The recovery rate varied among different disturbance types. Half of the clearcut and fire areas were at various stages of recovery, but the regeneration rate was much slower at MPB disturbed sites. Beetle outbreaks and fire created a positive compound effect on the seedling reestablishment, which suggests that beetle-killed serotinous lodgepole pines might have a new forest resilience mechanism to subsequent wildfire. Following the depiction of the disturbance pattern in landscapes, I further assessed the effects of a variety of biotic and abiotic factors on the outbreak dynamics in Grand County, Colorado. Thirty-four variables were included to develop a number of general linear models (GLM). Case and control samples were extracted from maps derived from satellite image. I first removed non-significant predictors based on the Bayesian Information Criterion in a multiple backward stepwise selection, and then built the model using the retained variables. A correction factor was added into the traditional GLM to account for model bias introduced by different ratios of case and control observations in the sample and in the population. Finally, I evaluated the model performance with an independent validation dataset, and generated predictive maps of MPB mortality. The final model had an average area under the curve value of 0.72 in predicting the annual area of new mortality. The results showed that neighborhood mortality, winter mean temperature anomaly, and residential housing density were positively associated with MPB mortality, whereas summer precipitation was negatively related. The extent of MPB mortality will expand under both RCP 4.5 and 8.5 climate-change scenarios, which implies that the impacts of MPB outbreaks on vegetation composition and structure, and ecosystem functioning are likely to increase in the future. Disturbance is the main driver for the heterogeneous landscape mosaic, and the understanding about its pattern, regime characteristics, impacts on forest resilience system and future trend is of great importance to many fields of research, such as carbon cycling, biological conservation, and environmental protection. The overall working approach in this dissertation provides feasible algorithms that can be applied to other regions, and can aid in generating consistent and high temporal frequency data on insect mortality and other disturbances impacting a variety of ecosystem services.
Download or read book Multiscale Landscape Pattern Monitoring Using Remote Sensing written by and published by . This book was released on 2013 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Department of Agriculture, restoration project supported by the Collaborative Forest Landscape Restoration Program (CFLRP). The objective of the 4FRI is to restore fire-adapted conditions on 2.4 million acres of ponderosa pine (Pinus ponderosa) spanning four National Forests. Robust monitoring techniques are needed to assess the impacts of landscape-scale management and progress toward desired conditions, and to facilitate adaptive management. Remotely sensed information was identified as a major source of pre- and post-treatment data useful for evaluating changes in horizontal forest structure (or landscape pattern) at multiple spatial and temporal scales. With sponsorship from the Remote Sensing Steering Committee, the Remote Sensing Applications Center developed and tested a workflow and methods for assessing and monitoring landscape pattern using high-resolution imagery. The workflow and methods, which are applicable to other forests, consist of 1) creating a tree/nontree patch map of the analysis area from high-resolution imagery, 2) dividing the patch map into sublandscapes and computing landscape pattern indices (LPIs) for each one, 3) assessing the accuracy of the LPIs and calibrating them, and 4) summarizing and analyzing the LPIs at multiple scales to track change through time. In addition to describing the workflow and methods, this report also provides a comprehensive discussion of special considerations for implementing a landscape pattern monitoring program for other large geographic areas.
Download or read book Dynamics of Forest Insect Populations written by Alan A. Berryman and published by Springer. This book was released on 2013-06-08 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Insects multiply. Destruction reigns. There is dismay, followed by outcry, and demands to Authority. Authority remembers its experts or appoints some: they ought to know. The experts advise a Cure. The Cure can be almost anything: holy water from Mecca, a Government Commis sion, a culture of bacteria, poison, prayers denunciatory or tactful, a new god, a trap, a Pied Piper. The Cures have only one thing in common: with a little patience they always work. They have never been known entirely to fail. Likewise they have never been known to prevent the next outbreak. For the cycle of abundance and scarcity has a rhythm of its own, and the Cures are applied just when the plague of insects is going to abate through its own loss of momentum. -Abridged, with insects in place of voles, from C. Elton, 1924, Voles, Mice and Lemmings, with permission of Oxford University Press This book is an enquiry into the "natural rhythms" of insect abundance in forested ecosystems and into the forces that give rise to these rhythms. Forests form unique environ ments for such studies because one can find them growing under relatively natural (pri meval) conditions as well as under the domination of human actions. Also, the slow growth and turnover rates of forested ecosystems enable us to investigate insect popula tion dynamics in a plant environment that remains relatively constant or changes only slowly, this in contrast to agricultural systems, where change is often drastic and frequent.
Download or read book Advances in Remote Sensing for Global Forest Monitoring written by Erkki Tomppo and published by MDPI. This book was released on 2021-09-01 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: The topics of the book cover forest parameter estimation, methods to assess land cover and change, forest disturbances and degradation, and forest soil drought estimations. Airborne laser scanner data, aerial images, as well as data from passive and active sensors of different spatial, spectral and temporal resolutions have been utilized. Parametric and non-parametric methods including machine and deep learning methods have been employed. Uncertainty estimation is a key topic in each study. In total, 15 articles are included, of which one is a review article dealing with methods employed in remote sensing aided greenhouse gas inventories, and one is the Editorial summary presenting a short review of each article.
Download or read book Insect Sampling in Forest Ecosystems written by Simon R. Leather and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Insect Sampling in Forest Ecosystems highlights the problems faced by entomologists working in forest ecosystems. Insects play a major part in all aspects of ecology Brings together the methodology needed to investigate insects through the various strata of the forest canopy Covers techniques associated with various specialised groups of forest insects Each chapter is backed up by a sound approach to experimental design and data analysis Essential reading for advanced students and researchers as well as teachers
Download or read book Sourcebook on Remote Sensing and Biodiversity Indicators written by Holly Strand and published by . This book was released on 2007 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This sourcebook is intended to assist environmental managers and others who work with indicators in pursuing appropriate methods for indicator testing and production, and to offer some guidance to those responsible for the interpretation of indicators and implementation of decisions based on them. Upon reading this document, technical advisers, environmental policy makers, and remote sensing lab directors and project managers should be able to identify specific, relevant uses of remote sensing data for biodiversity monitoring and indicator development related to the CBD." --p. 8.
Download or read book Multi scale Remote Sensing Techniques for Vegetation Stress Detection written by John C. Craig and published by . This book was released on 2001 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Saproxylic Insects written by Michael D. Ulyshen and published by Springer. This book was released on 2018-05-21 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume offers extensive information on insect life in dying and dead wood. Written and reviewed by leading experts from around the world, the twenty-five chapters included here provide the most global coverage possible and specifically address less-studied taxa and topics. An overarching goal of this work is to unite literature that has become fragmented along taxonomic and geographic lines. A particular effort was made to recognize the dominant roles that social insects (e.g., termites, ants and passalid beetles) play in saproxylic assemblages in many parts of the world without overlooking the non-social members of these communities. The book is divided into four parts: · Part I “Diversity” includes chapters addressing the major orders of saproxylic insects (Coleoptera, Diptera, Hymenoptera, Hemiptera, Lepidoptera and Blattodea), broadly organized in decreasing order of estimated global saproxylic diversity. In addition to order-level treatments, some chapters in this part discuss groups of particular interest, including pollinators, hymenopteran parasitoids, ants, stag and passalid beetles, and wood-feeding termites. · Part II “Ecology” discusses insect-fungal and insect-insect interactions, nutritional ecology, dispersal, seasonality, and vertical stratification. · Part III “Conservation” focuses on the importance of primary forests for saproxylic insects, offers recommendations for conserving these organisms in managed forests, discusses the relationships between saproxylic insects and fire, and addresses the value of tree hollows and highly-decomposed wood for saproxylic insects. Utilization of non-native wood by saproxylic insects and the suitability of urban environments for these organisms are also covered. · Lastly, Part IV “Methodological Advancements” highlights molecular tools for assessing saproxylic diversity. The book offers an accessible and insightful resource for natural historians of all kinds and will especially appeal to entomologists, ecologists, conservationists and foresters.
Download or read book Assessment of Forest Canopy Vertical Structure with Multi scale Remote Sensing written by Phillip Thomas Vivian Wilkes and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Insects in Forests written by Urwa Alalouni and published by . This book was released on 2014 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:
