Journal of Threatened Taxa |
www.threatenedtaxa.org | 26 July 2022 | 14(7): 21470–21472
ISSN 0974-7907 (Online) | ISSN 0974-7893
(Print)
https://doi.org/10.11609/jott.8058.14.7.21470-21472
#8058 | Received 17 June 2022 | Final
received 13 June 2022 | Finally accepted 14 June 2022
A new southern distribution
record for Pacific Marten Martes caurina
Maximilian L. Allen 1,
Brianne Kenny 2, Benjamin Crawford 3 & Morgan J.
Farmer 4
1 Illinois Natural History Survey,
University of Illinois, 1816 S. Oak Street, Champaign, IL 61820, USA.
1,3 Department of Natural Resources
and Environmental Sciences, University of Illinois, 1102 S. Goodwin,
Urbana, Illinois 61801, USA.
2 Unaffiliated Researcher, 15044 N.
Scottsdale Rd., Suite 300 Scottsdale, AZ, 85254, USA.
4 Department of Forest and Wildlife
Ecology, University of Wisconsin, 1630 Linden Drive, Madison, WI 53706, USA.
1 maxallen@illinois.edu
(corresponding author), 2 briannekenny@gmail.com, 3 benjamin.p.crawford@gmail.com,
4 mjmorales@wisc.edu
Editor: Anonymity
requested. Date of publication:
26 July 2022 (online & print)
Citation: Allen, M.L., B. Kenny, B.
Crawford & M.J. Farmer (2022). A new
southern distribution record for Pacific Marten Martes
caurina. Journal of Threatened Taxa 14(7): 21470–21472. https://doi.org/10.11609/jott.8058.14.7.21470-21472
Copyright: © Allen et al. 2022. Creative Commons Attribution
4.0 International License. JoTT allows unrestricted use, reproduction, and
distribution of this article in any medium by providing adequate credit to the
author(s) and the source of publication.
Funding: None.
Competing interests: The authors
declare no competing interests.
Acknowledgements: We thank the Illinois Natural
History Survey and the University of Illinois for their support.
Martens in
North America are forest-specialist mesocarnivores
that are listed by the IUCN with an overall status of Least Concern (Helgen & Reid 2015), but they are often locally a
species of conservation concern. Although all martens in North America were
previously considered one species, recent advances in genetics show there are
two distinct species of martens (Carr & Hicks
1997; Lucid et al. 2020; Schwartz et al. 2020): American Martens Martes americana
and Pacific Martens Martes caurina. Pacific Martens inhabit North America from the
Rocky Mountains to the West coast of the Pacific Ocean and from the boreal
forests of southern British Columbia to the southern terminus of the Rocky
Mountains in north-central New Mexico. Martens were historically limited by
overharvest from the fur trade, but they are currently more threatened by
habitat degradation and fragmentation (Helgen &
Reid 2015).
Pacific
Martens were likely never common in New Mexico, which is at the southern edge
of their range (Image 1), but are now rare and classified as threatened in the
state (Threatened and Endangered Species of New Mexico 2020). The New Mexico
Department of Fish and Game has completed multiple surveys for martens in New
Mexico since 1997. Pacific martens have been consistently found in the North Central
mountains near Taos and Chama (Long et al. 2015), with martens seeming to be
most abundant in Taos County (Long et al. 2015). It is unclear, however, if the
surveys have clearly defined the southern boundary of the population, and
individuals at the southern end of their range could be going undetected.
Here we
report a recent Pacific Marten detection and explore its implications for the
marten population in the Rocky Mountains. On 4 September 2020, during a hike in
the Rocky Mountains north-east of Santa Fe, New Mexico, we observed a Pacific
Marten at 35.835, -105.750 (Image 2).
This
detection is farther south than any confirmed Pacific Marten sighting in the
published literature since 1884 (Image 3). In 1884, two specimens were
collected by L. Dyche in the Las Vegas Mountains;
however, the exact locality information for these specimens is not known, and
our observation could be anywhere from 0 to 15 km farther south (Durrant 1952) (Image 3).
It is
unknown if this sighting represents the documentation of a population or just a
lone individual. There have been unverified scat and tracks, which are
notoriously difficult to identify accurately, in the same general area (Long
2001; Long et al. 2015). Thus, it is possible Pacific Martens have been present
in the area but have gone undetected, or that martens are expanding back into
the southern extent of their historic range. It is unlikely that Pacific
Martens will be found farther south as potential suitable habitat is limited to
high elevation forests that are only found in the Rocky Mountains (Long 2001),
which end nearby. In addition, as climate and land use change
progresses, species ranges may also shift further north or higher in elevation
to track climate, weather, or structural features (e.g., complex forest) that
they are adapted to (Martin et al. 2021). A systematic survey to determine the
occupancy and abundance of martens in the southern limit of the population
could be a valuable follow up study. Calls for public observations, including
posting observations to sites readily available to scientists such as iNaturalist (www.inaturalist.org), could also be beneficial
in determining locations in the rugged Rocky Mountains where Pacific Martens
are either expanding or may have persisted.
For images - -
click here (for full PDF)
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