9349

• UCREFRP Catalog Number: 9349
• Author: Fischer, N. T., M. S. Toll, A. C. Cully and L. D. Potter.
• Title: Vegetation Along Green and Yampa Rivers and Response to Fluctuating Water Levels, Dinosaur National Monument.
• USFW Year: 1983.
• USFW - Doc Type: Albuquerque.
• Copyright Material: NO

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Historic photographs of streamside vegetation provided further documentation
of vegetative distribution and species composition over time. P4ajor
vegetational communities or dense stands of individual taxa were mapped
along the stream courses, as an overview of the range and extent of
conditions which exist now, and which would be subject to change on the
Yampa and 1!~ver Green. Extensive plant collections were made to identify
unknown species encountered on transects, and to contribute to the
taxonomic array currently known from Dinosaur National Monument.
This report begins with a review of environmental parameters of
the study area and relevant floristic studies. The many forms of
information collected in this study are then organized by major river
corridors (Yampa, upper Green, and the Green below the confluence) so as to
construct a picture of the present vegetation and the critical factors
which control this distribution for each corridor. Transect data,
representative photos, and mapping (proceeding from upstream to downstream
sampling locations) are used to illustrate this picture of present
vegetation. Early photos paired with 1982 retakes are used to document
vegetative continuity or change on each corridor. Finally, we discuss
potential areas for change on the Yampa (and lower Green), based on
examples from the two corridors with altered flow regimes and other
related studies of manipulated rivers.