scholarly journals Lichens of Grand Teton National Park

Author(s):  
Sharon Eversman

Lichens are an important group when considering the biodiversity of a region. While not usually considered economically important, they are conspicuous parts of the flora of alpine rock and soil, contributing to rock weathering and providing habitat for small invertebrates. In the forest zones, large hanging fruticose species are food for deer and elk and are indicators of high air quality. Soil lichens at all elevations are important stabilizers, helping to prevent wind and water erosion. Since lichens have a very slow growth rate, a diverse lichen flora indicates stable undisturbed environments. The major objective of this project was to characterize the lichen flora of Grand Teton National Park, providing a species list as part of the ongoing lichen studies in the northern Rocky Mountains and as a contribution to the database for all national parks. Lichen specimens were also collected for element analysis to provide a baseline for air quality assessment.

Author(s):  
Charles E. Taylor ◽  
Yi-Ju Wang ◽  
Martin L. Cody

We explored how Yellow Warblers (Dendroica petechia) alter their songs when encountering noise in Grand Teton National Park. Different strategies for avoiding signal masking are used by other species of birds, yet there is a lack of information of birds’ responses to higher noise levels–above 65 dB; such levels are often found in National Parks that have many visitors. In this study, we investigated singing behavior of Yellow Warblers when facing noise that ranged from 30 dB to 80 dB. In these preliminary results, we found that some features of Yellow Warblers did not appear to change with background noise level, including mean minimum frequency, bandwidth and song length. Other song features we studied did show small but statistically significant changes with higher background noise, including the peak frequency and the mean minimum frequency, both of which were significantly negatively correlated with the level of background noise. This result is different from the positive correlations that are typically observed. We speculate that this difference is due to the very high dB levels of background noise that we observed.   Featured photo bywagon16 on Flickr. https://flic.kr/p/G2W6Bk


Author(s):  
N. Qwynne Lackey ◽  
Kelly Bricker

Concessioners play an important role in park and protected area management by providing visitor services. Historically, concessioners were criticized for their negative impacts on environmental sustainability. However, due to policy changes, technological advances, and shifting market demands, there is a need to reevaluate the role of concessioners in sustainable destination management in and around parks and protected areas. The purpose of this qualitative case study situated in Grand Teton National Park (GTNP), which was guided by social exchange theory, was to explore U.S. national park concessioners’ influence on sustainable development at the destination level from the perspective of National Park Service (NPS) staff, concessioners, and local community members. Sustainability was examined holistically as a multifaceted construct with integrated socioeconomic, cultural, and environmental dimensions. Twenty-three participants completed semistructured interviews. Researchers identified four thematic categories describing concessioners’ influence on sustainability; motivations and barriers to pursuing sustainability initiatives; and situational factors that facilitated concessioners’ sustainability actions. While participants commented on the negative environmental impacts of concessioners and their operations, these data suggest that concessioners were working individually and collaboratively to promote environmental, socioeconomic, and cultural sustainability in and around GTNP. Some concessioners were even described as leaders, testing and driving the development of innovative sustainability policies and practices. These actions were motivated, in part, by contractual obligations and profit generation. However, concessioners also had strong intangible motivators, such as intrinsic values and a strong sense of community, that drove their positive contributions to sustainability. Based on these data, we recommend that those involved in future theoretical and practical work with concessioners acknowledge the importance of both tangible and intangible motivators when attempting to promote higher levels of sustainability achievement and collaboration. This will become increasingly important as land management agencies continue to embrace strategies beyond the traditional “parks as islands” approach to management. Additionally, future work should explore more specifically the role of policy, conceptualizations of sustainability, and private industry sponsorship in promoting concessioners’ contributions to sustainability, especially in collaborative settings. This work is needed to understand if and how these observations generalize to other contexts.


Author(s):  
Yi-Ju Wang ◽  
Charles E. Taylor ◽  
Martin L. Cody

We explored how Yellow Warblers (Dendroica petechia) alter their songs when encountering noise in Grand Teton National Park. Different strategies for avoiding signal masking are used by other species of birds, yet there is a lack of information of birds’ responses to higher noise levels -- above 65 dB; such levels are often found in National Parks that have many visitors. In this study, we investigated singing behavior of Yellow Warblers when facing noise that ranged from 30 dB to 80 dB. In these preliminary results, we found that some features of Yellow Warblers did not appear to change with background noise level, including mean minimum frequency, bandwidth and song length. Other song features we studied did show small but statistically significant changes with higher background noise, including the peak frequency and the mean minimum frequency, both of which were significantly negatively correlated with the level of background noise. This result is different from the positive correlations that are typically observed.  We speculate that this difference is due to the very high dB levels of background noise that we observed.   Featured photo by wagon16 on Flickr. https://flic.kr/p/G2W6Bk


Author(s):  
Kent McKnight

The 6 weeks field studies during the summer of 1987 relate to that part of the previously stated objectives (e.g. McKnight, Harper, & McKnight, 1986) concerned with the inventory of fungal species in the Wyoming national parks, particularly Grand Teton National Park. With the return of Dr. Meinhard Moser, University of Innsbruck, Innsbruck, Austria, we intended to concentrate on the Hymenomycete genus Cortinarius. The range of species studied was broadened significantly by the shorter visits of two additional collaborators, Dr. Harry Thiers, University of San Francisco, San Francisco, CA, and Dr. Joe Ammirati, University of Washington, Seattle, WA.


Author(s):  
Robert Eng ◽  
Kurt Alt

With the accelerated use of our national parks there is growing concern over the impact this increased visitation might have on their flora and fauna. For this reason it is important to gather baseline data on the biota for future management and interpretive programs. Two species of concern in Grand Teton National Park are the bald eagle (Haliaeetus leucocephalus) and osprey (Pandion haliaetus).


2020 ◽  
Vol 20 (4) ◽  
Author(s):  
Kássio C. Araújo ◽  
Etielle B. Andrade ◽  
Ana C. Brasileiro ◽  
Ronildo A. Benício ◽  
Felipe P. Sena ◽  
...  

Abstract The Sete Cidades National Park is located in the Brazilian municipalities of Piracuruca and Brasileira, Piauí state, in a transitional zone between the Caatinga and Cerrado biomes. Studies on its herpetofauna were limited to anuran distribution notes and a snake checklist. Thus, here we present an unpublished species list of anurans from Sete Cidades National Park, Piauí state, northeastern Brazil. We recorded one of the two highest species richness for all northeastern National Parks, and also increased the geographic distribution of one species in the state of Piauí. Most species observed are common of both Caatinga and Cerrado biomes or have wide distribution in Brazil. The anuran assemblage of Sete Cidades National Park is more similar to those registered at the Delta do Parnaíba Environmental Protection Area, Ceará, Piauí and Maranhão states, and Ubajara National Park, Ceará state. These results increase our knowledge on anuran diversity in northeastern Brazil, providing basic information for management and conservation actions of an important Brazilian National Park.


Author(s):  
Bryant Woods ◽  
Tad Weaver

The Rocky Mountain exotic plant project is designed to determine (1) what exotics are capable of invading disturbed sites in major vegetational (environmental) zones of the Northern Rocky Mountains and (2) whether they are capable of invading near-climax closed vegetation in these zones. As an accessory activity we are determining (3) what natives are invading the same disturbed zones since we hope to find, among them, species likely to be successful on these sites and therefore species that might competitively exclude exotic invaders. A second accessory project of interest to managers, but with less immediate scientific value, was designed to (4) record the present distribution of major weeds along roadsides of Grand Teton National Park as they were recorded in Glacier during 1983-84.


Author(s):  
William Gribb ◽  
Henry Harlow

Our National Parks house some of North America's most undisturbed habitat and offer a benchmark for comparing ecosystem dynamics with areas more influenced by human related perturbations. Dam construction has altered water flow patterns on many of our country's rivers resulting in species composition changes of aquatic plants, invertebrates and fish. Semi-aquatic mammals such as otters and beaver are also profoundly influenced by the irregular seasonal flow patterns resulting from reservoir release schedules. For example, Jackson Lake dam was constructed in 1910 resulting in the impoundment of an additional 625,000 cubic feet of water. Since its construction and the establishment of Grand Teton National Park (GTNP), this water has been released during mid- to late summer months causing unpredictable fluctuations of river levels after the normal spring run off. This unpredictability is illustrated by the trend in water flow on the Snake River at Moran for the period 1904-2000 (Figure 1). A species that has received little attention in terms of population numbers and resistance to abnormal water fluctuations resulting from Jackson Dam is the beaver (Castor canadensis). In GTNP, only the work of Collins (1976) has provided any significant knowledge of the distribution and habitat of the beaver in the Park. In fact, the beaver has been generally overlooked in the Greater Yellowstone Area with only a few studies conducted in Yellowstone (Warren, 1926; Jonas, 1955; Consolo-Murphy and Hanson, 1993 ).


Author(s):  
Christopher Monz ◽  
Abigail M. Kidd

As recreation and tourism in parks and protected areas continues to increase, managers face rising concerns of degradation of natural resources and the visitor experience. Many park visitors are seeking opportunities to view or photograph wildlife. Visitor behavior in prime wildlife-viewing areas often involves visitors parking along roadways and exiting their cars to view wildlife. This creates a phenomenon known as a “wildlife jam”, as visitors park informally along a roadway, often becoming pedestrians as they view wildlife, while other motorists attempt to drive through. To date, no studies have comprehensively investigated this phenomenon. Our study characterizes the nature of wildlife jams on the Moose-Wilson Road in Grand Teton National Park. Global Positioning System (GPS) technology was used to collect high-accuracy data on location and duration of the jams. Observations during jams characterize size (how many visitors and cars were involved) and visitor behaviors during jams. Preliminary results suggest that jam characteristics including presence of park staff, species involved, and location, can affect the duration, extent, and visitor behaviors that occur. Understanding the nature of these jams will enable park managers to minimize the potential negative effects of jams on wildlife and the visitor experience.   Featured photo by letdown102 on Flickr. https://flic.kr/p/57jUok


Sign in / Sign up

Export Citation Format

Share Document