Changing the taxonomic scale of a biotic-assemblage dataset influences our ability to detect
ecological patterns. In bioassessments, a test-site's biological community is compared …

A map of ecological regions of the conterminous United States, first published in 1987, has
been greatly refined and expanded into a hierarchical spatial framework in response to user …

Page 1 90 M9-1 2nd ed. 1999 UNIVERSITY OF CA RIVERSIDE, LIBRARY 3 1210 02478 6921
Protection Agency EPA Office of Water 4503F EPA 841-B-99-002 July 1999 Washington, DC …

The definitive reference in its field, Ecological Risk Assessment, Second Edition details the
latest advances in science and practice. In the fourteen years since the publication of the …

Traditional methods of establishing control sites in field-oriented biomonitoring studies of
water quality are limited. The reference-condition approach offers a powerful alternative …

The relative influence of geologic versus anthropogenic attributes of catchments on stream
ecosystems was examined in 45 catchments of a river basin in central Michigan. Each …

The United States Clean Water Act (CWA; 1972, and as amended, US Code title 33,
sections 1251–1387) provides the long‐term, national objective to “restore and maintain …

The goal of biological monitoring is to evaluate the effect of human activities on biological
resources. In this study, we linked human activities across landscapes to specific changes in …

We describe a general process for developing an index of fish assemblage integrity, using
the Willamette Valley of Oregon, USA, as an example. Such an index is useful for assessing …

1. Citizens are concerned about the quality of water resources and many participate in
monitoring activities, though doubts remain about the quality of the data volunteers collect …