The Historical Ecology of Upper Rock Creek Valley, Md
Title | The Historical Ecology of Upper Rock Creek Valley, Md PDF eBook |
Author | Douglas Harlan Boucher |
Publisher | |
Pages | 70 |
Release | 1969 |
Genre | Botany |
ISBN |
Interior, Environment, and Related Agencies Appropriations for 2006
Title | Interior, Environment, and Related Agencies Appropriations for 2006 PDF eBook |
Author | United States. Congress. House. Committee on Appropriations. Subcommittee on Interior, Environment, and Related Agencies |
Publisher | |
Pages | 1962 |
Release | 2005 |
Genre | Law |
ISBN |
Art of the Ancestors: Spatial and temporal patterning in the ceiling rock art of Nawarla Gabarnmang, Arnhem Land, Australia
Title | Art of the Ancestors: Spatial and temporal patterning in the ceiling rock art of Nawarla Gabarnmang, Arnhem Land, Australia PDF eBook |
Author | Robert G. Gunn |
Publisher | Archaeopress Publishing Ltd |
Pages | 918 |
Release | 2018-12-31 |
Genre | Social Science |
ISBN | 1789690714 |
This volume, focusing on the ceiling art at Nawarla Gabarnmang, one of the richest rock art sites in Arnhem Land (in Australia’s Northern Territory), presents a new systematic approach to the archaeological recording and documentation of rock art developed to analyse the spatial and temporal structure of complex rock art panels.
Roaming the Rocky Mountains and Environs
Title | Roaming the Rocky Mountains and Environs PDF eBook |
Author | Robert G. H. Raynolds |
Publisher | Geological Society of America |
Pages | 318 |
Release | 2008-01-01 |
Genre | Science |
ISBN | 0813700108 |
Prepared following the 2007 GSA Annual Meeting in Denver, Colorado, these 15 guides illustrate the latest geological and archeological thinking on a variety of current research themes.
Peninsula Watershed Historical Ecology Study
Title | Peninsula Watershed Historical Ecology Study PDF eBook |
Author | Sean Baumgarten |
Publisher | |
Pages | 280 |
Release | 2021-07 |
Genre | Science |
ISBN | 9781950313075 |
The Peninsula Watershed has been integral to the story of San Francisco's growth ever since the Gold Rush. The rapid influx of settlers to San Francisco during the Gold Rush spurred a sudden demand for a reliable water source, which led to the formation of the Spring Valley Water Works (later purchased by the Spring Valley Water Company [SVWC]) in 1858 (Hanson 2005 ). Over the subsequent 70 years, SVWC bought up large swaths of land on the Peninsula, and constructed a complex system of dams, tunnels, and pipes to capture and transport water to San Francisco. Within the Peninsula Watershed, this system includes the Crystal Springs and San Andreas reservoirs, located in the San Andreas Creek, Laguna Creek, and Upper San Mateo Creek basins along the San Andreas Fau The City of San Francisco purchased SVWC in 1930, and today the Peninsula Watershed, managed by the San Francisco Public Utilities Commission (SFPUC), continues to be a key source of water for San Francisco and for other communities in the South and East Bay. Despite the past 150 years of reservoir construction and other hydrologic modifications, the construction of transportation and utility corridors, and the large-scale suburban development that has occurred to the east, the Peninsula Watershed has remained largely undeveloped and is managed to protect water quality, water supply, wildlife habitat, and a range of other natural and cultural resources. The watershed supports some of the largest intact remnants of contiguous habitat in the region, including extensive oak woodlands, old-growth Douglas-fir forests, serpentine grasslands, chaparral, and coastal scrub. Over the past 250 years since Spanish explorers first set foot on the watershed, however, changes in disturbance regimes and other large-scale anthropogenic modifications, including fire suppression, homesteading, livestock grazing, agriculture, tree planting, introduction of plant pathogens, spread of invasive species, and climate change, have altered vegetation dynamics and changed the distribution and structure of vegetation communities throughout the watershed. The changes have raised many questions about the historical ecology of the watershed: What was the extent, distribution, and composition of terrestrial, riparian, and wetland habitats prior to Euro-American modification? How have vegetation distributions changed over the past two centuries, and what are the implications of those changes for species support? Are there remnant patches of relatively unmodified habitat present in the watershed, or areas that are currently in a state of recovery? Where are current habitat characteristics most similar to or different from historically documented conditions? How have key natural and anthropogenic disturbance regimes and processes changed over time? The Peninsula Watershed Historical Ecology Study aims to advance understanding of landscape conditions of the Peninsula Watershed prior to major Euro-American modification, and to provide insights into the nature and drivers of vegetation change since the first Spanish explorers set foot in the watershed 250 years ago. The primary goal of the research was to examine the historical extent, distribution, and composition of terrestrial vegetation types and their trajectories of change within the watershed. To the extent possible, research also addressed historical riparian, wetland, and estuarine habitats; hydrology and sediment dynamics; wildlife support; land use history; and a range of other topics.
Directory of Historical Organizations in the United States and Canada
Title | Directory of Historical Organizations in the United States and Canada PDF eBook |
Author | American Association for State and Local History |
Publisher | Rowman Altamira |
Pages | 1366 |
Release | 2002 |
Genre | History |
ISBN | 9780759100022 |
This multi-functional reference is a useful tool to find information about history-related organizations and programs and to contact those working in history across the country.
Tijuana River Valley
Title | Tijuana River Valley PDF eBook |
Author | Samuel Safran |
Publisher | |
Pages | 228 |
Release | 2017-01-31 |
Genre | Science |
ISBN | 9780990898597 |
The Tijuana River Valley Historical Ecology Investigation synthesizes hundreds of historical maps, photographs, and texts to reconstruct the ecological, hydrological, and geomorphic conditions of the Tijuana River valley prior to major European-American landscape modification. How did the valley look and function before there was the state of California, the city of Tijuana, or an international border? What habitat types and wildlife were found there? How have these habitat types and the physical processes that shaped them changed over time? And finally, what can the valley's ecological past tell us about its present and future? In answering these fundamental questions, this richly-illustrated study provides scientists, managers, and residents in the valley with information designed to support and inspire ongoing management and restoration activities.