816 results — topic: Alpine & Subalpine Ecology

Dataset

Sensor-based phenology from snowmelt experiment gradient, East River, Colorado, 2017 to 2020

The timing of snowmelt is a critical cue for the initiation of growth in mountain meadow ecosystems and can also impact the duration and magnitude of plant production. High frequency observations of species-level phenology are time consuming and require a high degree of expertise, and publicly avail

Heidi Steltzer, Amanda Henderson, Chelsea Wilmer2021DOI: 10.15485/1842910
Dataset

Surface soil temperature and water content from warming experiment located at the Rocky Mountain Biological Laboratory, Colorado, 2015 to 2019

This data package consists of soil temperature and soil water content sensor data from the warming experiment near the Rocky Mountain Biological Laboratory. Data range is from summer 2015 to summer 2019, when the warming manipulation was terminated. The location of the warming experiment is in the u

Heidi Steltzer, Amanda Henderson, Chelsea Wilmer2021DOI: 10.15485/1842908
Dataset

Microclimate observations associated with snowmelt experiment gradient sites, East River, Colorado, 2017 to 2020

The timing of snowmelt in mountain systems is a main driver of vegetation phenology and production, as well as recharge of soil moisture and ground water. Decreases in maximum snowpack and warmer spring temperatures have led to a higher frequency of early snowmelt. This study combines a natural elev

Heidi Steltzer, Chelsea Wilmer, Amanda Henderson2021DOI: 10.15485/1842907
Dataset

Quality Assurance and Quality Control (QA/QC) of Meteorological Time Series Data for Billy Barr, East River, Colorado USA

A comprehensive Quality Assurance (QA) and Quality Control (QC) statistical framework consists of three major phases: Phase 1—Preliminary raw data sets exploration, including time formatting and combining datasets of different lengths and different time intervals; Phase 2—QA of the datasets, includi

Boris Faybishenko, Roelof Versteeg, Gilberto Pastorello2021DOI: 10.15485/1823516
Dataset

East River Watershed Stable Water Isotope Data in Precipitation, Snowpack and Snowmelt 2016-2020

Stable water isotopes (d18O, d2H and d-excess) are important tracers in hydrologic research to understand water partitioning between vegetation, groundwater, and runoff but are rarely applied to large watersheds with persistent snowpack and complex topopgraphy. Data were collected for the Lawrence B

Rosemary Carroll, Wendy Brown, Alexander Newman2021DOI: 10.15485/1824223Cited 1 times
Dataset

Sensor-based phenology from snowmelt experiment gradient, East River, Colorado, 2017 to 2020

The timing of snowmelt is a critical cue for the initiation of growth in mountain meadow ecosystems and can also impact the duration and magnitude of plant production. High frequency observations of species-level phenology are time consuming and require a high degree of expertise, and publicly avail

Heidi Steltzer, Amanda Henderson, Chelsea Wilmer2021DOI: 10.15485/1842910
Dataset

Microclimate observations associated with snowmelt experiment gradient sites, East River, Colorado, 2017 to 2020

The timing of snowmelt in mountain systems is a main driver of vegetation phenology and production, as well as recharge of soil moisture and ground water. Decreases in maximum snowpack and warmer spring temperatures have led to a higher frequency of early snowmelt. This study combines a natural elev

Heidi Steltzer, Chelsea Wilmer, Amanda Henderson2021DOI: 10.15485/1842907
Student Paper

Species richness along elevation gradient and possible correlation factors

Lopez M.2009
Student Paper

Foraging behavior of parasitized and non-parasitized voles during new moon and full moon events

According to trade-off theory, animals weigh the benefits of obtaining resources against the risks of being preyed upon during these activities. One major factor that can influence an animal’s risk assessment is its current body condition, for example animals that are of lower body condition may be

Eisel M. C. E.2009
Student Paper

Environmental forces drive morphological variation in an alpine annual plant

The way in which plants respond evolutionarily to environmental change partially depends on the magnitude of variation present within populations. In an attempt to understand the evolutionary response of Androsace septentrionalis (Rock Jasime) to current and future climate change in the Elk mountain

Curtis J. B.2009
Article

A global test of the pollination syndrome hypothesis

The pollination syndrome hypothesis as usually articulated does not successfully describe the diversity of floral phenotypes or predict the pollinators of most plant species. Caution is suggested when using pollination syndromes for organizing floral diversity, or for inferring agents of floral adap

Ollerton J., Alarcon R., Waser N. M.2009Annals of BotanyDOI: 10.1093/aob/mcp031Cited 472 times
Article

Biodiversity scales from plots to biomes with a universal species-area curve

John Harte,1* Adam B. Smith1 and Classic theory predicts species richness scales as the quarter-power of area, yet species– David Storch2,3 area relationships (SAR) vary widely depending on habitat, taxa, and scale range. Because 1 Energy and Resources Group, power-law SAR are used to predict specie

Harte J., Smith A. B., Storch D.2009Ecology LettersDOI: 10.1111/j.1461-0248.2009.01328.xCited 225 times
Article

Nutrient availability and phytoplankton nutrient limitation across a gradient of atmospheric nitrogen deposition

Atmospheric nitrogen (N) deposition to lakes and watersheds has been increasing steadily due to various anthropogenic activities. Because such anthropogenic N is widely distributed, even lakes relatively removed from direct human disturbance are potentially impacted. However, the effects of increase

Elser J. J., Kyle M., Steger L.2009EcologyDOI: 10.1890/08-1742.1Cited 180 times
Article

The effects of nutrient addition on floral characters and pollination in two subalpine plants, <i>Ipomopsis aggregata</i> and <i>Linum lewisii</i>

Burkle L. A., Irwin R. E.2009Plant Ecology
Article

The importance of interannual variation and bottom-up nitrogen enrichment for plant-pollinator networks

Striking changes in food web structure occur with alterations in resource supply. Like predator–prey interactions, many mutualisms are also consumer–resource interactions. However, no studies have explored how the structure of plant–pollinator networks may be affected by nutrient enrichment. For thr

Burkle L. A., Irwin R.2009OikosDOI: 10.1111/j.1600-0706.2009.17740.xCited 85 times
Student Paper

Trapping the litter: a negative feedback of climate change in the litter quality of montane vegetation in the Rocky Mountains

Winkler D. E., Cloyed C., Jarecke K.2008
Student Paper

Effects of water addition on below- and above-ground carbon processes across a montane elevational gradient

Local temperature increases and more frequent extreme rainfall events are predicted effects of climate change at high latitudes (IPCC 2007). Precipitation regimes are also shifting, but science is less able to predict these patterns (IPCC 2007). Water balance is critical as it ultimately drives prim

Potter T. S.2008
Student Paper

Effect of Soil Metals on Pollination of Subalpine Wildflowers

Metals-rich soils can occur naturally or through human activity, such as mining. Plants growing in metal-rich soils often incorporate metals into their tissues; the concentration of these metals varies, and plants which concentrate the metals most strongly are termed hyperaccumulators. Accumulation

Little C. J.2008
Student Paper

THE EFFECTS OF CLIMATE CHANGE ON THE TIMING AND ABUNDANCE OF DIPTERA IN A SUBALPINE MEADOW

Diptera play a critical role in alpine and subalpine ecosytems, though they are little studied in terms of what guides their timing and abundance. In order to reveal what cues dipteran timing this study was conducted for 24 years, using a Malaise trap to capture the insects, dipteran distributions w

JOHNSTON E. B.2008