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Book Synopsis Standardized Hierarchical Vegetation Classification by : Alejandro Velázquez
Download or read book Standardized Hierarchical Vegetation Classification written by Alejandro Velázquez and published by Springer. This book was released on 2016-08-16 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book outlines the transitions between cultured and natural land cover/vegetation types and their implications in the search for alternatives to reverse the trend of anthropogenic environmental degradation. It also elaborates on the proposed “standardized hierarchical Mexican vegetation classification system” and geobotanical mapping, a critical transversal environmental issue. The first chapter consists of an historical review of the common approaches to the study of vegetation both in Mexico and in other regions of the world. The second chapter concisely analyzes the existing schools of thought that have led to the development of vegetation classification systems based on physiognomic, structural and floristic approaches. The focal point of the book is the “standardized hierarchical Mexican vegetation classification system” (SECLAVEMEX – “Sistema jerárquico estandarizado para la clasificación de la vegetación de México”). Chapter 3 describes the system’s organizational levels along with the criteria defining them and the nomenclatural basis for the denomination of each type of vegetation. It also includes a series of tables explaining and precisely defining the meaning of each concept, criterion, character and element used to help readers successfully identify the type of vegetation in a determined area. The fourth chapter highlights SECLAVEMEX's inclusive character as evidenced through its compatibility with other systems currently used around the globe. Three concepts are critically reviewed: land cover, land use and vegetation. These are often the study subject of the contrasting disciplines geography, agronomy and ecology, which all rely upon plant species assemblages. As such, the final chapter focuses on a critical transversal environmental issue – geobotanical mapping. Geobotanical mapping offers a baseline for land cover/use planning and provides critical information on ecological, economic and cultural attributes, which can be used as a basis for environmental-policy decisions. The proposed SECLAVEMEX was applied to Mexico as an example of land cover, land use and vegetation patterns intermingling as the result of a long human influence. SECLAVEMEX, however, can be adapted and hopefully adopted globally as a baseline for consistently comparing geobotanical patterns and their transitions.
Book Synopsis Towards a Standardized Hierarchical Classification of Vegetation for Remote Sensing by : J. A. Howard
Download or read book Towards a Standardized Hierarchical Classification of Vegetation for Remote Sensing written by J. A. Howard and published by . This book was released on 1982 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Manual of California Vegetation by : John Orvel Sawyer
Download or read book A Manual of California Vegetation written by John Orvel Sawyer and published by California Native Plant Society. This book was released on 2009 with total page 1316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Standardized National Vegetation Classification System by : National Biological Survey (U.S.)
Download or read book Standardized National Vegetation Classification System written by National Biological Survey (U.S.) and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Federal Geographic Data Committee. Vegetation Subcommittee Publisher : ISBN 13 : Total Pages :60 pages Book Rating :4.:/5 (431 download)
Book Synopsis Vegetation Classification Standard by : United States. Federal Geographic Data Committee. Vegetation Subcommittee
Download or read book Vegetation Classification Standard written by United States. Federal Geographic Data Committee. Vegetation Subcommittee and published by . This book was released on 1997 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Six Rivers National Forest (N.F.), National Forest Plan by :
Download or read book Six Rivers National Forest (N.F.), National Forest Plan written by and published by . This book was released on 1995 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Classification of Great Basin Plant Communities Occurring on Dugway Proving Ground, Utah by : Verl Emrick
Download or read book Classification of Great Basin Plant Communities Occurring on Dugway Proving Ground, Utah written by Verl Emrick and published by . This book was released on 1999 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1996, staff with Dugway Proving Ground (DPG) and the U.S. Army Construction Engineering Research Laboratory (CERL) launched a project to classify and describe plant communities occurring at DPG. The goal of the project was to use field data to derive a plant community classification system specific to DPG. The classification followed, with certain modifications, the framework of the Nature Conservancy's Standardized National Vegetation Classification System (SNVCS). The SNVCS is a hierarchical system that summarizes plant communities at four physiognomic and two florist levels. A total of 500 releves were inventoried during the summers of 1996 and 1997. The field data were subjected to several multivariate classification techniques, including hierarchical and non hierarchical cluster analysis, and multi-dimensional scaling. Four physiognomic classes, 5 formations, 17 alliances, and 26 associations were identified at DPG. The results of the derived classification will subsequently be used to assist in mapping the vegetative communities at DPG.
Book Synopsis Proceedings--Conifer Tree Seed in the Inland Mountain West Symposium, Missoula, Montana, August 5-6, 1985 by :
Download or read book Proceedings--Conifer Tree Seed in the Inland Mountain West Symposium, Missoula, Montana, August 5-6, 1985 written by and published by . This book was released on 1986 with total page 914 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Classification of Great Basin Plant Communities Occurring on Dugway Proving Ground, Utah by :
Download or read book Classification of Great Basin Plant Communities Occurring on Dugway Proving Ground, Utah written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1996, staff with Dugway Proving Ground (DPG) and the U.S. Army Construction Engineering Research Laboratory (CERL) launched a project to classify and describe plant communities occurring at DPG. The goal of the project was to use field data to derive a plant community classification system specific to DPG. The classification followed, with certain modifications, the framework of the Nature Conservancy's Standardized National Vegetation Classification System (SNVCS). The SNVCS is a hierarchical system that summarizes plant communities at four physiognomic and two florist levels. A total of 500 releves were inventoried during the summers of 1996 and 1997. The field data were subjected to several multivariate classification techniques, including hierarchical and non hierarchical cluster analysis, and multi-dimensional scaling. Four physiognomic classes, 5 formations, 17 alliances, and 26 associations were identified at DPG. The results of the derived classification will subsequently be used to assist in mapping the vegetative communities at DPG.
Author :United States. Federal Geographic Data Committee. Vegetation Subcommittee. Hierarchy Revisions Working Group Publisher : ISBN 13 : Total Pages :222 pages Book Rating :4.:/5 (954 download)
Book Synopsis Classification and Description of World Formation Types by : United States. Federal Geographic Data Committee. Vegetation Subcommittee. Hierarchy Revisions Working Group
Download or read book Classification and Description of World Formation Types written by United States. Federal Geographic Data Committee. Vegetation Subcommittee. Hierarchy Revisions Working Group and published by . This book was released on 2016 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: An ecological vegetation classification approach has been developed in which a combination of vegetation attributes (physiognomy, structure, and floristics) and their response to ecological and biogeographic factors are used as the basis for classifying vegetation types. This approach can help support international, national, and subnational classification efforts. The classification structure was largely developed by the Hierarchy Revisions Working Group (HRWG), which contained members from across the Americas. The HRWG was authorized by the U.S. Federal Geographic Data Committee (FGDC) to develop a revised global vegetation classification to replace the earlier versions of the structure that guided the U.S. National Vegetation Classification and International Vegetation Classification, which formerly relied on the UNESCO (1973) global classification (see FGDC 1997; Grossman and others 1998). This document summarizes the development of the upper formation levels. We first describe the history of the Hierarchy Revisions Working Group and discuss the three main parameters that guide the classification-- it focuses on vegetated parts of the globe, on existing vegetation, and includes (but distinguishes) both cultural and natural vegetation for which parallel hierarchies are provided. Part I of the report provides an introduction to the overall classification, focusing on the upper formation levels. Part II provides a description for each type, following a standardized template format. These descriptions are a first preliminary effort at global descriptions for formation types, and are provided to give some guidance to our concepts.
Book Synopsis A Preliminary Vegetation Classification of the Tombstone, Arizona, Vicinity by : Edmundo Garcia-Moya
Download or read book A Preliminary Vegetation Classification of the Tombstone, Arizona, Vicinity written by Edmundo Garcia-Moya and published by . This book was released on 1972 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need for classifying vegetation in a more precise way is evident. Also, there is a need to provide a hierarchical classification scheme that will match changes in image characteristics as one moves through the scales from space to conventional aerial photography. Such refined classifications of vegetation are the first steps toward a better understanding of the potentialities and limitations of a specified area which help in the detection of analogous environmental conditions for resource allocation and management purposes. These needs become more urgent as use and competition for natural resources and land increases. The first approximation of a classification scheme may meet these needs for a test site in the Tombstone, Arizona, vicinity. This classification task was accomplished by the use of a "hierarchical- polythetic-agglomerative" package using presence-absence data and standardized cover estimates, The following tentative associations and a variant were found upon division of the original data into groups of convenient size to meet the limitations of the programs: Association A (Panicum hirticaule/Tidestromia lanuginosa- Boerhaavia coulteri) la (a variant of Association A) Association B (Rhus microphylla-Dalea formosa) Association C (Gutierrezia sarothrae/Eriogonum abertianum) Association D (Menodora scabra/Tridens grandiflorus) Association E (Hilaria belangeri) Association F (Gilia rigidula-Rhynchosia texana) Association G (Hilaria mutica/Eriochloa gracilis/Crotalaria pumila) Association H (Haplopappus tenuisectus /Eragrostis lehmanniana) As sociation I (Ayenia pusilla/Eragrostis intermedia) Association J (Cnidoscolus angustidens) Association K (typical association lacking character species) of Alliance III (Fouquieria splendens-Acacia constricta-Aloysia wrightii) Association L (Agave palmeri-Agave parryi/Haplopappus laricifolius) Association M (Mortonia scabrella) These were grouped by the classification into units of higher rank. Association (A), (B), and the variant (la) grouped into an alliance with the character species, Acacia vernicosa-Larrea tridentata-Flourensia cernua, Associations (C), (D), (E), and (F) grouped into the Yucca elata/Bouteloua eriopoda Alliance; and Associations (I), (J), and (K) were held together in an Alliance by the character species, Fouquieria splendens-Acacia constricta-Aloysia wrightii. Validity of the character and differential species as association and subassociation "identifiers" was tested by the use of stepwise discriminant analysis. Two hierarchical levels and two runs per group were carried out using this analysis. A perfect discrimination between or among the groups was found at all levels except one. Species identified as differential or character species in the classification process were found to be the best discriminants. This suggests that the vegetation units identified by these species are valid. The "hierarchical-polythetic-agglomerative" approach to vegetation classification provides the kind of framework which is compatible with the classical phytosociological techniques of vegetation study. It eliminates, however, the cumbersome task of hand sorting and tabulation and increases the capacity of complex operations as well as introduction of more systematic and thorough evaluation into the analysis. This approach of classifying vegetation appears to be suited for survey-type studies in areas where vegetation information is limited and the need exists for an initial classification in order to begin more comprehensive quantitative studies. This does not preclude using the method for other purposes. Because it is a hierarchical method, one can go into as much classification detail as is dictated by the purpose of the vegetation study. This last feature is well suited to the use of the results in interpretation of multiscale photography so important in the field of resource analysis. Research needs to be done to answer the very fundamental question of why Euclidean distance (as a measure of similarity) and Ward's method (as a sorting strategy) provided a more adequate hierarchical classification scheme when presence and absence data are used rather than standardized values. Research is needed on the most effective criteria to divide large data sets into groups of the appropriate size. Results of this classification now need to be tested by practical field use in the recognition of ecosystems and their mapping on appropriate scales of remote sensing imagery. To aid the practical user of this information, a dichotomous key to the phytosociological classes was developed. This requires the recognition of 8 species to make classifications at alliance level and 32 species to achieve the association separations. A key for subassociation level was not prepared because the practical value of this level is somewhat in doubt.
Book Synopsis A Field Guide to the Rangeland Vegetation Types of the Northern Province by : Thomas Michael Jimerson
Download or read book A Field Guide to the Rangeland Vegetation Types of the Northern Province written by Thomas Michael Jimerson and published by . This book was released on 2000 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Holocene and Anthropocene Environmental History of Mexico by : Nuria Torrescano- Valle
Download or read book The Holocene and Anthropocene Environmental History of Mexico written by Nuria Torrescano- Valle and published by Springer Nature. This book was released on 2019-12-02 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides essential information on Mexico’s Holocene and Anthropocene climate and vegetation history. Considering the geography of Mexico – which is home to a variety of climatic and environmental conditions, from desert and tropical to high mountain climates – this book focuses on its postglacial paleoecology and paleoclimatology. Further, it analyses human intervention since the middle Holocene as a major agent of environmental change. Offering a valuable tool for understanding past climate change and its relationship with present climate change, the book is a must-read for botanists, ecologists, palaeontologists and graduate students in related fields.
Book Synopsis Discriminant and Hierarchical Analyses in Vegetation Classification by : Larry LeRoy Larson
Download or read book Discriminant and Hierarchical Analyses in Vegetation Classification written by Larry LeRoy Larson and published by . This book was released on 1974 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Remote Sensing Modeling and Applications to Wildland Fires by : John J. Qu
Download or read book Remote Sensing Modeling and Applications to Wildland Fires written by John J. Qu and published by Springer. This book was released on 2014-12-12 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists and managers alike need timely, cost-effective, and technically appropriate fire-related information to develop functional strategies for the diverse fire communities. "Remote Sensing Modeling and Applications to Wildland Fires" addresses wildland fire management needs by presenting discussions that link ecology and the physical sciences from local to regional levels, views on integrated decision support data for policy and decision makers, new technologies and techniques, and future challenges and how remote sensing might help to address them. While creating awareness of wildland fire management and rehabilitation issues, hands-on experience in applying remote sensing and simulation modeling is also shared. This book will be a useful reference work for researchers, practitioners and graduate students in the fields of fire science, remote sensing and modeling applications. Professor John J. Qu works at the Department of Geography and GeoInformation Science at George Mason University (GMU), USA. He is the Founder and Director of the Environmental Science and Technology Center (ESTC) and EastFIRE Lab at GMU.
Book Synopsis Proceedings--Grizzly Bear Habitat Symposium by :
Download or read book Proceedings--Grizzly Bear Habitat Symposium written by and published by . This book was released on 1986 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book General Technical Report INT written by and published by . This book was released on 1986 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
