Download or read book Assessment of Land Cover Change and Regeneration in a Northern California Forested Ecosystem Using Historical Landsat and GIS written by Charles Avrom Kiedman and published by . This book was released on 1999 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Remote Sensing for Sustainable Forest Management written by Steven E. Franklin and published by CRC Press. This book was released on 2001-06-13 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: As remote sensing data and methods have become increasingly complex and varied - and increasingly reliable - so have their uses in forest management. New algorithms have been developed in virtually every aspect of image analysis, from classification to enhancements to estimating parameters. Remote Sensing for Sustainable Forest Management reviews t

Download or read book Technical Papers written by and published by . This book was released on 1997 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Guide to Programs of Geography in the United States and Canada written by and published by . This book was released on 1998 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book California s Forests and Rangelands written by Forest and Rangeland Resources Assessment Program (Calif.) and published by . This book was released on 1988 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Historical Legacies Shape Contemporary Forests and Woodlands written by Kelly J Easterday and published by . This book was released on 2018 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global changes in climate and increased anthropogenic activity are fundamentally reshaping the structure and function of ecosystems across scales. The velocity, scale, and intensity of human impact are irrefutable, yet quantifying the effects of anthropogenic activities in relation to natural ecosystem dynamics can be difficult. Understanding the interaction between human activities and landscape change is of paramount importance, especially as anthropogenic driven land cover conversion and disturbances threaten ecosystem biodiversity and natural resources. Our approaches to natural resource management are challenged when environmental outcomes are embedded in complex socio-ecological systems characterized by profound uncertainties and interactive. Interdisciplinary approaches are thus needed to adequately address contemporary environmental problems and evaluate interactions between biophysical and socio-ecological drivers of change. The research presented in this dissertation has two broad research foci. First, I explore the linkages between human activity and landscape change in the context of California forests and woodlands. I draw on historical and contemporary forest inventory data and investigate more than a century of landscape transformations in California to understand the drivers of change that influence today’s landscape. By studying the changes in forest and woodland distribution and structure across California, I review the often under-evaluated broad scale influence of socio-ecological factors such as land ownership and land management in contributing to forest densification and landscape change. Second, my work contributes to the discussion of technical issues of data availability and data aggregation when historical data are used in modern ecological analysis and combined with contemporary data. My research links historical and contemporary empirical data through data science approaches in data digitization, data aggregation, data sharing, spatial modeling, and species distribution modeling in order to increase the scope and potential of historical data to answer complex environmental problems. At the core of this work is one valuable and recently digitized historical ecological data collection: the California Vegetation Type Mapping (VTM) Project. My second chapter is motivated by several recent studies that report climate (i.e. climate water deficit (CWD)) as the primary mechanism of large tree decline and change in forest structure in California in the 20th century. Reflecting on these studies and other conflicting opinions of primary drivers of change, I found very few studies that quantify the impact of land ownership and land management on the quantities of large trees and other characteristics of forest structure. Land ownership has been used to understand the long-term effects of and variation in land management practices; especially when spatially explicit data on management practices are unavailable or incomplete. Thus, in Chapter Two, I explicitly investigate 20th-century changes in forest structure across six ownership classes in California. In comparing historical and contemporary forest structural data I found that declines in large trees and increases in small tree density were consistent across the state, irrespective of ownership boundaries. However, there were important differences in the magnitude of this change. In particular, this pattern is most pronounced on private timberlands which experience up to 400% regional increases in small tree density since 1930. Nearly all land ownership classes experience declines in large trees, however, private timberland and National Park/Wilderness areas experience a significant reduction of 83% and 73% respectively. In Chapter Three, I investigate the effects of urban development on changes to the distribution of oak species in California. First, by modeling historical patterns of richness for eight oak species using historical map and plot data from the California Vegetation Type Mapping (VTM) collection I examine spatial intersections between hot spots of historical oak richness and modern urban and conservation land. I found that impacts from development and conservation vary by both species and richness. At the state level, the impact of urban development on oaks has been small within the areas of the highest oak richness but areas of high oak richness are also poorly conserved. In the first two chapters, I discuss the relationship between social and biophysical drivers of landscape change. This kind of understanding of long-term patterns of change requires data availability and the ability to re-use data. Following from these, Chapter 4 discusses preserving history's place in the growing data landscape, I review three approaches to sharing historical data from field stations using principles from data science. To encourage greater use of historical data across scientific disciplines it is vital to make data findable, accessible, interoperable, and reusable (e.g. the FAIR principles). This summary of three important data collections emerging from the University of California showcase the potential for their use in research and encourages similar ventures that use common archival, geospatial, and data science practices to shepherd historical data out of file drawers and into the contemporary digital data landscape.

Download or read book Forest Stewardship Series 4 Forest History written by and published by UCANR Publications. This book was released on 2007 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part 4 of the 24-part Forest Stewardship Series. The Forest Stewardship Series is a 24-part free online publication that provides owners of California forestland with a comprehensive source of information pertinent to the management and enjoyment of their lands. This information will help you formulate and implement strategies for achieving your personal goals as a landowner. The series provides an introduction to the lifelong study of forest stewardship that is part of owning forest property.

Download or read book Monitoring Wildland Vegetation in California on a 5 year Coordinated Schedule Using Remote Sensing GIS and Ground Based Sampling written by Ralph Warbington and published by . This book was released on 2000 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Using Landsat and a Bayesian Hard Classifier to Study Forest Change in the Salmon Creek Watershed Area from 19722013 written by David Stone Mullis and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Salmon Creek Watershed in Sonoma County, California, USA, is home to a variety of wildlife, and many of its residents are mindful of their place in its ecology. In the past half century, several of its native and rare species have become threatened, endangered, or extinct, most notably the once common Coho salmon and Chinook salmon. The cause of this decline is believed to be a combination of global climate change, local land use, and land cover change. More specifically, the clearing of forested land to create vineyards, as well as other agricultural and residential uses, has led to a decline in biodiversity and habitat structure. I studied subscenes of Landsat data from 1972 to 2013 for the Salmon Creek Watershed area to estimate forest cover over this period. I used a maximum likelihood hard classifier to determine forest area, a Mahalanobis distance soft classifier to show the softwares uncertainty in classification, and manually digitized forest cover to test and compare results for the 2013 30 m image. Because the earliest images were lower spatial resolution, I also tested the effects of resolution on these statistics. The images before 1985 are at 60 m spatial resolution while the later images are at 30 m resolution. Each image was processed individually and the training data were based on knowledge of the area and a mosaic of aerial photography. Each subscene was classified into five categories: water, forest, pasture, vineyard/orchard, and developed/barren. The research shows a decline in forest area from 1972 to around the mid1990s, then an increase in forest area from the mid1990s to present. The forest statistics can be helpful for conservation and restoration purposes, while the study on resolution can be helpful for landscape analysis on many levels.

Download or read book Monitoring Land Cover Changes in California written by and published by . This book was released on 2003 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Changing California written by and published by . This book was released on 2003 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmental Analysis Alternatives for the Northern California Planning Area Guide written by United States. Forest Service. California Region and published by . This book was released on 1976 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Physical Geography of the Mediterranean written by Jamie Woodward and published by OUP Oxford. This book was released on 2009-05-07 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume explores the climates, landscapes, ecosystems and hazards that comprise the Mediterranean world. It traces the development of the Mediterranean landscape over very long timescales and examines modern processes and key environmental issues in a wide range of settings. The Mediterranean is the only region on Earth where three continents meet and this interaction has produced a very distinctive Physical Geography. This book examines the landscapes and processes at the margins of these continents and the distinctive marine environment between them. Catastrophic earthquakes, explosive volcanic eruptions and devastating storms and floods are intimately bound up within the history and mythology of the Mediterranean world. This is a key region for the study of natural hazards because it offers unrivalled access to long records of hazard occurrence and impact through documentary, archaeological and geological archives. The Mediterranean is also a biodiversity hotspot; it has been a meeting place for plants, animals and humans from three continents throughout much of its history. The Quaternary records of these interactions are more varied and better preserved than in any other part of the world. These records have provided important new insights into the tempo of climate, landscape and ecosystem change in the Mediterranean region and beyond. The region is unique because of the very early and widespread impact of humans in landscape and ecosystem change - and the richness of the archaeological and geological archives that chronicle this impact. This book examines this history and these interactions and places current environmental issues in long term context. Contributors : Ramadan Husain Abu-Zied Harriet Allen Jacques Blondel Maria-Carmen Llasat James Casford Marc Castellnou Andrew Goudie Andrew Harding Angela Hayes Tom Holt Babette Hoogakker Philip Hughes Jos Lelieveld John Lewin Francisco Lloret Francisco Lopez-Bermudez Mark Macklin Jean Margat Anne Mather Frédéric Médail Christophe Morhange Clive Oppenheimer Jean Palutikof Gerassimos Papadopoulos Josep Piñol David Pyle Jane Reed Neil Roberts Eelco Rohling Iain Stewart Stathis Stiros John Thornes Chronis Tzedakis John Wainwright

Download or read book California s Forest Resources written by California. Department of Forestry and published by . This book was released on 1979 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Policy Statement to Address Growing Conflict Over Changing Uses on California s Forests and Rangelands 1990 1995 written by Forest and Rangeland Resources Assessment Program (Calif.) and published by . This book was released on 1990 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Understanding the Ecological Challenges in California Protected Areas Through the Lens of Remote Sensing Technologies written by Shenyue Jia and published by . This book was released on 2016 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: Protected area (PA), usually built to address the potential ecological pressure from different sources, aims to sustain, protect, and maintain the wilderness of nature for ecological, economic, and scenic purposes. Establishing, maintaining, and expanding the monitor network of PAs helps to enhance the ecological and biological value of these areas, especially in the light of species decline and habitat degradation. Intensively monitored and regulated through various administrative agencies, California keeps one of the best maintained network of PAs in the world, which supports various studies to address the significant threats to the preservation of wilderness from the projected warming climate and pressure from human development, including water deficit and prolonged drought, abnormality in wildfires, urban sprawl, and light pollution. With the help of satellite remote sensing technologies and geospatial analysis, we can overcome the limitation of data availability in traditional ecological studies and expand the study of PAs to a continuous gradient both in time and space. This dissertation aims to develop a comprehensive understanding through remote sensing technologies on three signi cant and linked ecological disturbance in California PAs, including the change of land cover, the dynamic of wildfire, and the extent and intensity of human activity reflected by stable nighttime light. Exploiting various of remote sensing observation and its derivatives, this study investigated the three topics through trend, seasonality, abnormality, spatial distribution, and hotspot of change to provide a cost-effective and repeatable studying paradigm for PA managers to better understand the past and present situation, as well as the ecological challenges of PAs. In addition, it also supplemented the study of PAs as a case study focusing on a non-tropic ecosystem, which usually involves greater interaction with human thus faces ecological pressure at a higher level. The analysis on land cover dynamics and change from 2000 to 2015 found that many protected areas in California have experienced an increase of brownness since 2000. PAs with a higher coverage of greenness are associated with a higher temporal variability, mostly because of the more complex life cycle of green vegetation and the sensitivity to the disturbance, possibly due to a drying climate regime. Partly linked to the gradual influence from the drying climate, the change in the regime of wildfire may cause a more drastic change in land cover, through the removal of aboveground biomass and its in uence on the post-wild re regrowth. In the study focusing on California PAs from 2000 to 2013, a shift in wildfire-prone land cover and season was observed starting from 2008, while the wildfires southern California shrubland during the fall season became nearly extinct and the northern California evergreen forest wildfires in the late spring increased, partly explained by the recent loss of available fuel in biomass and the increase of potential of ignition in evergreen forest as a result of prolonged drought. Most burned areas experienced a signi cant weakening of the immediate growing season, although the in uence from re on local landscape decayed over time, which became irrelevant after ve years on average. The lower fuel moisture and a more intensive removal of aboveground biomass makes shrubs more sensitive in time, with a shorter period for biomass removal by re and a greater delay in the start and peak of post- re growing season. The long-enduring and sometimes intensive disturbance from human activity, especially from the development can be even more disastrous than wild re in damaging the aboveground biomass by interrupting the natural nutrient and mass circulation,thus brings more fundamental and sometimes irreversible consequences to ecosystems. However, after decades of protection, especially the removal of settlements in side PAs, land management strategies may have bored beneficial fruits to reduce the negative effects from historical human disturbance. As a good proxy of human activity and development, the historical records of stable nighttime light from 1992 to 2012 tracked the temporal change and spatial migration of hotspot of human activity inside California PAs. A decrease of lit area at night inside PAs occurred from 1992 to 2012, with a turning point around 2004 when the relatively sharp decrease started from became more gradual thereafter. Besides, area covered by higher stable nighttime light not only shrank, but also retreated from the area with high wilderness. If solidly con rmed by other socioeconomic variable, the above nding demonstrated the e ectiveness of PA establishment and the fruits of multiple conservation strategies kept for decades. The investigation of three major disturbances to the wilderness of California PAs provided an example of exploiting the cost-e ective and continuously available observation of the Earth surface at a regional level to understand the ecological challenges of PAs. The findings can help the National Park Service and other related agencies of PA administration in the review, adjustment, and proposal of regulations and policies regarding to PAs. Future work and analysis can be focused on improving the accuracy of predictive models involved the analysis, either by concentrating on the di erence between categories of protection, or through a better understanding on the related ecological process and mechanisms to identify or develop better explanatory variables. In addition, when conducting analysis on PAs, the bu er area adjacent to PAs cannot be ignored, which is an important source of disturbance to PAs as well as an ecological corridor that links nearby PAs into clusters. Considering the great diversity in the landscape of PAs, the analytical results can be aggregated and interpreted by different ecoregions to derive more accessible guidance to local policy makers.

Download or read book Emerging Technologies and Techniques for Remote Sensing of Coastal and Inland Waters written by Wesley Moses and published by Frontiers Media SA. This book was released on 2022-11-08 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: