December 2011 article (early view): “Threats to Riparian Ecosystems in Western North America: An Analysis of Existing Literature,” by Boris Poff, Karen A. Koestner, Daniel G. Neary, and Victoria Henderson
This literature review does more than simply list publications. Judging from topics of papers, it looks at how threats to riparian ecosystems have been perceived in the literature.
A total of 453 journal articles, reports, books, and book chapters addressing threats to riparian ecosystems in western North America were analyzed to identify, quantify, and qualify the major threats to these ecosystems as represented in the existing literature. Publications were identified either as research, policy, literature review, historical comparison, or management papers. While the types of threats vary on spatial and temporal scales, some persist through decades in western North America. This analysis shows that grazing has been perceived as a dominant threat since the 1980s, but has been diminishing in the past decade, while invasive species, dams and, in recent years, climate change are increasingly represented in the literature as threats to riparian ecosystems in western North America.
[Please note: I have quoted and paraphrased freely from the article, but the interpretation is my own!]