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Abstract: Session E  3:30 pm (Back to Session F)
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A Fluvial Geomorphic Analysis of the Rare and Endangered New Mexico Meadow Jumping Mouse

W. Barry Southerland, PhD
National Fluvial Geomorphologist
USDA-Natural Resources Conservation Service: W2Q
Portland, OR

The New Mexico Meadow Jumping Mouse (NMJM), known as Lapus hudsonios luteus (ZAHU) was listed by the US Fish and Wildlife Service as endangered in July of 2014.  In response, the Santa Fe National Forest (SFNF) is reassessing grazing management within the allotments which contain occupied and proposed critical NMJM habitat (Jemez and Cuba Ranger Districts in New Mexico).  The NMJM habitat has been critically reduced to a few populations in the Western United States, principally New Mexico and Arizona high elevation mountain meadows with streams.  Additional sites were surveyed in the White Mountain Range in the Apache-Sitgreaves National Forest.  The Forest Service was asked to create a conservation strategy which should serve to guide future management actions which will likely affect the mouse.  Characterizing the current condition of NMJM habitat on the SFNF is key to developing a conservation strategy and future land management.  During the summer months of 2016 and 2017, a comprehensive geomorphic inventory and assessment was completed on known occupied habitat in both the White Mountain Range in Arizona and New Mexico Santa Fe National Forest.  The USFS and Northern Arizona State University has been using tracking plates both prior too geomorphic inventories and within the same season.  The NRCS was asked to provide a physical geomorphic inventory at 23 sites.  All sites chosen are known ZAHU sites.  Populations of ZAHU range from) 0 to 43 NMJM.  Geomorphic conditions, stream types, valley types, confinement and other physical floodplain and bankfull conditions are closely related to the population of ZAHU.  Channel evolution stage, stage of adjustment, and bank height ratios are showing high correlation with the absence or presence of the rare and endangered ZAHU.  To better understand and propose effective management for ZAHU this survey was capable of gathering spatial data and analyzing cause and effect impacting the absence or presents of ZAHU.  The process used in the analysis and recommendation reflex the utility of the Stream Functional Pyramid.