Disconnected Rivers: Linking Rivers to Landscapes by Ellen Wohl

By Ellen Wohl

This crucial and available ebook surveys the background and current of river structures around the usa, exhibiting how human actions have impoverished our rivers and impaired the connections among river worlds and different ecosystems.Ellen Wohl starts through introducing the elemental actual, chemical, and organic approaches working in rivers. She then addresses adjustments in rivers caused by payment and enlargement, describes the expansion of federal involvement in handling rivers, and examines the hot efforts to rehabilitate and preserve river ecosystems. In every one bankruptcy she specializes in a selected nearby case research and describes what occurs to a selected river organism—a chicken, North America’s biggest salamander, the paddlefish, and the yank alligator—when humans intervene with average techniques.

Show description

Read Online or Download Disconnected Rivers: Linking Rivers to Landscapes PDF

Best rivers books

Field Guide to California Rivers (California Natural History Guides, Volume 105)

Award-winning writer, naturalist, and conservationist Tim Palmer offers the realm of California rivers during this useful and encouraging box consultant. Loaded with pointers on the place to hike, fish, canoe, kayak, and raft, it bargains an interpretive technique that unearths geology, plant and wild lifestyles, hydrologic techniques, and different usual phenomena.

Human Dimensions of Global Environmental Change: Research Pathways for the Next Decade

Committee at the Human Dimensions of world switch and Committee on international swap examine, Board on Environmental swap and Society, coverage department, department of Behavioral and Social Sciences and schooling, nationwide study Council

This e-book is extracted from a miles higher file, worldwide Environmental switch: examine Pathways for the subsequent Decade, which addresses the complete variety of the clinical matters referring to international environmental switch and provides tips to the clinical attempt on those concerns within the usa. This quantity comprises bankruptcy 7 of that record, ''Human Dimensions of world Environmental Change,'' which was once written for the document through the Committee at the Human Dimensions of worldwide switch of the nationwide examine Council (NRC). It offers findings and conclusions at the key medical questions in human dimensions study, the teachings which have been discovered during the last decade, and the study imperatives for worldwide switch examine funded from the U.S..

Applied Thermodynamics for Meteorologists

This textbook on atmospheric thermodynamics is for college students of meteorology or atmospheric technological know-how. It additionally serves as a reference textual content for operating execs in meteorology and climate forecasting. it really is certain since it presents entire, calculus-based derivations of simple physics from first ideas, and connects mathematical relationships to real-world, functional climate forecasting functions.

Additional info for Disconnected Rivers: Linking Rivers to Landscapes

Sample text

But the variability of a natural river creates a diversity of habitats that support an assortment of aquatic organisms in the channel and riverside organisms in the floodplain. Many of these organisms are adapted to or require the disturbances associated with a natural river. As mentioned earlier, the seedlings of cottonwoods may germinate only after a flood has removed some of the older trees and freshly deposited a sandbar. The more diverse the physical habitats along a river, the greater the diversity of organisms occupying those habitats.

A channel with pools and riffles may have grazers feeding on the algae growing on the riffle cobbles in the streambed. Along the stream margins, shredders feed on accumulated leaf litter. In the pools, collectorgatherers feed on fine organic material. 16 08:00 30 A m e r i c a n R i v e r s absorb disturbances such as floods, or even toxic chemical spills, without completely breaking down and suffering massive species loss. Some species may be temporarily removed from a site by the disturbance, but others will survive.

The most common goal of river engineering is to stabilize a river channel—to make it ‘‘behave,’’ so that the water is always contained within the channel and the channel itself does not move or alter substantially. Humans try to treat rivers as canals, and diversity and variability are unwelcome challenges. But the variability of a natural river creates a diversity of habitats that support an assortment of aquatic organisms in the channel and riverside organisms in the floodplain. Many of these organisms are adapted to or require the disturbances associated with a natural river.

Download PDF sample

Rated 4.06 of 5 – based on 13 votes