A Quantitative and Statistical Study of the Plankton of the San Joaquin River and Its Tributaries in and Near Stockton, California, in 1913 PDF Download
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Author: Winfred Emory Allen
Publisher:
ISBN:
Category : Copepoda
Languages : en
Pages : 324
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Author: Winfred Emory Allen
Publisher:
ISBN:
Category : Copepoda
Languages : en
Pages : 324
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Book Description
Author: Winfred Emory Allen
Publisher: Forgotten Books
ISBN: 9780332118307
Category : Science
Languages : en
Pages : 328
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Book Description
Excerpt from A Quantitative and Statistical Study of the Plankton of the San Joaquin River and Its Tributaries in and Near Stockton, California, in 1913 Two points of difference from the typical river basin in its latitude are interesting characteristics of the San Joaquin. First, its drain age is northwestward away from the equator. Second, it consists throughout of a rather deep trough with comparatively abrupt sides and unusually flat bottom, the level of which is repeatedly broken by the deltas of tributaries entering in most cases very nearly at right angles. The land surfacevaries markedly in character with the differences in these tributaries, but with a constant tendency to the formation of swamps and marshes at the lower points through the deposit of the lighter organic matter not left in the tributary deltas. This condi tion is very prominent from some distance above Stockton on to the mouth of the river. Stockton itself is on the eastern border of an area of swampy peat land through which the course of the river can be maintained only by extensive systems of levees. Even then great stretches of the lower levels are inundated each year, and Stockton has the perennial problem of escaping from floods. It is quite evident from the foregoing that the lower valley as a whole is fertile, with a deep soil of good texture. The lower part is fairly well settled but there is as yet no adequate control of the water supply and an extensive area is practically undeveloped. The few cities are small and far apart. None of them is so situated as to cause any appreciable contamination of the river water near Stock ton. The whole basin is under the direct influence of the dry and wet seasons. With its low levels, this results in sluggish, almost stagnant flow of the main river during the first, and a brisk flow during the run-ofi' of flood waters incident to the second. This paper is published by permission of Dr. H. M. Smith, commissioner of the United States Bureau of Fisheries. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Bay Marine Piling Committee
Publisher: Forgotten Books
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 160
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Excerpt from The San Francisco Bay Marine Piling Survey Second Annual Progress Report C. A. Kofoid, Professor Of Biology and Assistant Director of the Scripps Institution for Biological Research. Walter Mulford, Professor of Forestry and head of the Division of Forestry, D. R. Hoagland, Associate Professor of Agricultural Chemistry, Secretary. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Winfred Emory 1873- Allen
Publisher: Palala Press
ISBN: 9781355418573
Category :
Languages : en
Pages : 326
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Book Description
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Winfred Emory Allen
Publisher:
ISBN:
Category : Aquatic biology
Languages : en
Pages : 292
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Book Description
Author: Winfred Emory Allen
Publisher:
ISBN:
Category : Plankton
Languages : en
Pages : 0
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Author: Robert A. Francis
Publisher: Routledge
ISBN: 9780815378716
Category :
Languages : en
Pages : 456
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Book Description
Invasive non-native species are a major threat to global biodiversity. Often introduced accidentally through international travel or trade, they invade and colonize new habitats, often with devastating consequences for the local flora and fauna. Their environmental impacts can range from damage to resource production (e.g. agriculture and forestry) and infrastructure (e.g. buildings, road and water supply), to human health. They consequently can have major economic impacts. It is a priority to prevent their introduction and spread, as well as to control them. Freshwater ecosystems are particularly at risk from invasions and are landscape corridors that facilitate the spread of invasives. This book reviews the current state of knowledge of the most notable global invasive freshwater species or groups, based on their severity of economic impact, geographic distribution outside of their native range, extent of research, and recognition of the ecological severity of the impact of the species by the IUCN. As well as some of the very well-known species, the book also covers some invasives that are emerging as serious threats. Examples covered include a range of aquatic and riparian plants, insects, molluscs, crustacea, fish, amphibians, reptiles and mammals, as well as some major pathogens of aquatic organisms. The book also includes overview chapters synthesizing the ecological impact of invasive species in fresh water and summarizing practical implications for the management of rivers and other freshwater habitats.
Author: United States. Environmental Protection Agency. Office of Water Programs
Publisher:
ISBN:
Category : Aquatic animals
Languages : en
Pages : 198
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Book Description
Author: Laith A. Jawad
Publisher: Springer Nature
ISBN: 3030515060
Category : Science
Languages : en
Pages : 1377
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Book Description
The Arabian Seas Marine Region encompasses marine areas from Djibouti to Pakistan, including the northern part of Somalia, the Red Sea, the Arabian/Persian Gulf, and parts of the Arabian Sea. Human pressures on the coastal and marine environments are evident throughout the region, and have resulted in harmful environmental effects. Oil and domestic, urban and industrial pollutants in several areas of this part of the world have caused local habitat degradation, eutrophication and algal blooms. Further, coastal landfill, dredging, and sedimentation, as well as nutrient and sediment runoff from phosphate mining, agriculture and grazing, and reduction in freshwater seepage due to groundwater extraction are all contributing to the degradation of coastal environments. This book discusses aspects not covered in other books on the region, which largely focus on marine biodiversity, and examines several environmental challenges that are often ignored, but which have a significant impact on the environment. Evaluating the status quo, it also recommends conservation measures and examines the abiotic factors that play a major main role in the environmental changes. Lastly, the book addresses the biodiversity of the area, providing a general context for the conservation and management measures discussed.
Author: University of California, Davis. Food Protection and Toxicology Center
Publisher:
ISBN:
Category : Agricultural chemicals
Languages : en
Pages : 300
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Book Description
