The UW National Parks Service Research Station Annual Reports最新文献

筛选

英文中文

Performing horizontal to vertical ratio testing in stiff soils in and around Grand Teton National Park 在大提顿国家公园及其周围的坚硬土壤中进行水平与垂直比测试

The UW National Parks Service Research Station Annual Reports Pub Date : 1900-01-01 DOI: 10.13001/uwnpsrc.2019.5733

S. Griffiths, Abbas Ansariaval

{"title":"Performing horizontal to vertical ratio testing in stiff soils in and around Grand Teton National Park","authors":"S. Griffiths, Abbas Ansariaval","doi":"10.13001/uwnpsrc.2019.5733","DOIUrl":"https://doi.org/10.13001/uwnpsrc.2019.5733","url":null,"abstract":"Horizontal to vertical spectral ratio (HVSR) testing was completed at two cross sections in and around GTNP. The HVSR testing produced reliable estimates of the fundamental frequencies for many of the sites tested. The goal of the testing was to determine a depth of soil above competent bedrock. However the fundamental frequencies recorded yielded predicted depths that are much shallower than expected. Also the predicted depths did not increase at greater distance from the Teton Range, which would be expected at these sites. Based on these predictions the authors do not believe the frequencies recorded are a good indication of the depth of the soil above bedrock but instead it is believed that the depths correspond with a layer of softer topsoil/overburden above a stiffer gravel layer. Although the goal of measuring the depth of soil above bedrock was not met, HVSR produced results that may be useful to others for determination of a fundamental frequency of resonance at our testing locations. \u0000 \u0000Featured photo by Anna Cressman, taken from the AMK Ranch photo collection. https://flic.kr/p/2jjWZGT","PeriodicalId":217302,"journal":{"name":"The UW National Parks Service Research Station Annual Reports","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124030053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Forecasting eco-evolutionary dynamics in the Northern Blue butterfly (2019 field season) 北方蓝蝶生态进化动态预测(2019年野外季节)

The UW National Parks Service Research Station Annual Reports Pub Date : 1900-01-01 DOI: 10.13001/uwnpsrc.2019.5743

Z. Gompert, L. Lucas

{"title":"Forecasting eco-evolutionary dynamics in the Northern Blue butterfly (2019 field season)","authors":"Z. Gompert, L. Lucas","doi":"10.13001/uwnpsrc.2019.5743","DOIUrl":"https://doi.org/10.13001/uwnpsrc.2019.5743","url":null,"abstract":"Natural selection can drive rapid evolutionary change, particularly in human-altered habitats. Rapid adaptation to global change requires standing genetic variation for ecologically important traits, but at present little is known about how much relevant genetic variation most populations possess. With this in mind, we began a long term study of genome-wide molecular evolution in a series of natural butterfly populations in the Greater Yellowstone Area in 2012 to quantify the contribution of environment-dependent natural selection to evolution in these butterfly populations, and determine whether selection varies enough across space and time to maintain variation that could facilitate adaptation to global change. In 2019, we visited 11 focal populations to collect samples for DNA and plant chemistry, estimate population sizes (mark-release-recapture methods), and survey arthropod communities at the sites. Our analyses are ongoing, and this is a preliminary report, but thus far we have found that census population sizes are much higher than contemporary effective population sizes (though these metrics are highly correlated), and that both are independent of genetic diversity levels. These results are consistent with the hypothesis that selection plays a central role in eco-evolutionary dynamics in this system. \u0000 \u0000Featured photo from figure 1 in report. ","PeriodicalId":217302,"journal":{"name":"The UW National Parks Service Research Station Annual Reports","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129307893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unlocking the biogeochemical role of beaver in state-transition of landscapes in Yellowstone's northern range: Tantalizing insights, initial results, and evolving research design 解开海狸在黄石公园北部地区景观状态转变中的生物地球化学作用:诱人的见解，初步结果和不断发展的研究设计

The UW National Parks Service Research Station Annual Reports Pub Date : 1900-01-01 DOI: 10.13001/uwnpsrc.2019.5741

M. Brooks

{"title":"Unlocking the biogeochemical role of beaver in state-transition of landscapes in Yellowstone's northern range: Tantalizing insights, initial results, and evolving research design","authors":"M. Brooks","doi":"10.13001/uwnpsrc.2019.5741","DOIUrl":"https://doi.org/10.13001/uwnpsrc.2019.5741","url":null,"abstract":"Extirpation of wolves from the Greater Yellowstone Ecosystem in the 1920s hypothetically triggered a trophic cascade in which herbivores over-browsed riparian zones once released from the fear of wolf (Canis lupus) predation. Eventually, vast meadow-wetland complexes transitioned to grass-lodgepole systems. By 1954, beaver (Castor canadensis) virtually abandoned the Greater Yellowstone Ecosystem. In 2000, Colorado State University established experimental dams with browsing exclosures for Long Term Environmental Research in Biology (LTREB) on three streams in Lamar Valley to compare hydrologic effects of pseudo-beaver dams and browsing on willow (Salix spp.) productivity and state transitions. In 2015, beaver began recolonizing the region. I investigate how the biogeochemical role of beaver versus their hydrologic influence affects the underlying mechanisms of state transition: nutrient cycling, productivity, and stream respiration. Analyses of the 2017 field samples showed that beaver streams trend toward higher nutrient levels and higher variances than the LTREB sites. These trends continued in 2018 and 2019. The data tentatively support the role of beaver as keystone species in state transitions. Interannual modeling of nutrient dynamics, comparisons of stream metabolism, and genetic identification of microbial communities are underway. Similarly, analyses of the repeated measures collected across the month of July 2019 are underway. \u0000 \u0000Featured photo from figure 1 in report.","PeriodicalId":217302,"journal":{"name":"The UW National Parks Service Research Station Annual Reports","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133287343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

首页上一页