Ecology: Recent submissions
Now showing items 21-40 of 262
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Biomass of fifty conifer forests and nutrient exports associated with their harvest
(1977)Biomasses of climax Rocky Mountain forests studied ranged from less than 50 to more than 300 tons/ha. Total biomass was approximately 1.5 times the biomass of normally merchantable boles. When compared with conventional ... -
Environmental and Climatic Factors Affecting Winter Hypoxia in a Freshwater Lake: Evidence for a Hypoxia Refuge and for Re-oxygenation Prior to Spring Ice Loss
(2020-09)Low dissolved oxygen, or hypoxia, is a common phenomenon in ice-covered lakes in winter. We measured dissolved oxygen (DO) before, during, and after ice-over to characterize the timing, severity, and spatial variability ... -
Toward spatio-temporal delineation of positive interactions in ecology
(2020-09)Given unprecedented rates of biodiversity loss, there is an urgency to better understand the ecological consequences of interactions among organisms that may lost or altered. Positive interactions among organisms of the ... -
Benthic Suffocation of Invasive Lake Trout Embryos by Fish Carcasses and Sedimentation in Yellowstone Lake
(2020-10)Introduced Lake Trout Salvelinus namaycush threaten native Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri in Yellowstone Lake, Yellowstone National Park, where gill nets have been used to suppress subadult and ... -
Wildflower Seed Sales as Incentive for Adopting Flower Strips for Native Bee Conservation: A Cost-Benefit Analysis
(2019-07)Improving pollinator habitat on farmlands is needed to further wild bee conservation and to sustain crop pollination in light of relationships between global declines in pollinators and reductions in floral resources. One ... -
High-severity wildfire limits available floral pollen quality and bumble bee nutrition compared to mixed-severity burns
(2019-12)High-severity wildfires, which can homogenize floral communities, are becoming more common relative to historic mixed-severity fire regimes in the Northern Rockies of the U.S. High-severity wildfire could negatively affect ... -
Food web controls on mercury fluxes and fate in the Colorado River, Grand Canyon
(2020-05)Mercury (Hg) biomagnification in aquatic food webs is a global concern; yet, the ways species traits and interactions mediate these fluxes remain poorly understood. Few pathways dominated Hg flux in the Colorado River ... -
Trampling Effects on Vegetation of the Trail Corridors of North Rocky Mountain Forests
(1974-08)The management of trails should be based on knowledge of the effects of humans on them; most of the available information has been reviewed by Speight (1973), Stankey & Lime (1973), and Liddle (1975). Observations of ... -
Tracking the migration of Pacific Golden-Plovers from nonbreeding grounds at Moorea, French Polynesia, using Pinpoint GPS-Argos tags
(2020-04)We used Pinpoint GPS-Argos tags to track migration of Pacific Golden-Plovers Pluvialis fulva in 2017 and 2018 from Moorea Island, at the extreme southeastern edge of the species’ winter range. Of 20 tagged birds, 13 uploaded ... -
Ecological effects of weather modification: effect of late snow melt on Festuca idahoensis meadows
(1974)Diversity, cover and productivity of Festuca idahoensis meadows become progressively lower as one moves: (1) from deep-soil to shallow-soil sites, or (2) from sites that melt out in mid-May to sites that melt in late May ... -
Pinus albicaulis in Central Montana: Environment, Vegetation and Production
(1974-07)Nineteen apparently climax, non-krumholz, whitebark pine (Pinus albicaulis) forests were sampled at 2490-2930 m in the Rocky Mountains of S-Central Montana. The understory of these forests is strongly dominated by Vaccinium ... -
Exotic invasion of timberline vegetation, northern Rocky Mountains, USA
(1990)Thirty-five exotic species were found in vegetation characteristic of Northern Rocky Mountain timberlines. At least 20 percent were intentionally introduced along road-sides. The diversity of invading exotics declined from ... -
Seeing whitebark pine in a northern Rocky Mountain (USA) landscape: notes for a field trip
(1990)The changing role of whitebark pine (Pinus albicaulis) along an altitudinal gradient typical of the Northern Rocky Mountains (USA) can be seen from the gondolas at the "Big Sky" resort near Bozeman, MT. Whitebark pine ... -
Berry production in three whitebark pine forest types
(1990)In the whitebark pine lwhortleberry (Pinus albicaulis/Vaccinium scoparium) habitat type of southwestern Montana, whortleberry plants produced seven to 69 berries I m• X yr in 1974. In subalpine fir (Abies lasiocarpa) habitat ... -
Biotic and microsite factors affecting whitebark pine establishment
(1990)To enhance establishment of future whitebark pine (Pinus albicaulis) forests, information is needed on the physical and biological factors affecting whitebark seed germination and seedling establishment. This paper ... -
Effects of temperature and temperature preconditioning on seedling performance of whitebark pine
(1990)Four experiments explored the effects of temperature on the germination and seedling performance of whitebark pine (Pinus albicaulis). While 1 month of stratification increased germination from 5 percent to about 40 percent, ... -
Stand development in whitebark pine woodlands
(1990)Analysis of density data from stands in the Northern Rocky Mountains shows that, while seedlings establish at the rate of over 1,000 I ha x year in whitebark pine-grouse whortleberry (Pinus albicaulis-Vaccinium scoparium) ... -
Climates of subalpine pine woodlands
(1990)The climate of whitebark pine (Pinus albicaulis) woodlands is generally cold (average daily maxima and minima in January are -2 and -11 °C, respectively) and snowy 1 to 3 m maximum pack) in winter and warm (July average ... -
Whitebark pine community types and their patterns on the landscape
(1990)Within whitebark pine's (Pinus albicaulis) relatively narrow zone of occurrence-the highest elevations of tree growth from California and Wyoming north to British Columbia and Alberta-this species is a member of diverse ... -
Occurrence of Multiple Stems in Whitepark Pine
(1990)Depending on the stand, Montana-Wyoming whitebark pines (Pinus albicaulis) may have multiple stems in 8 to 79 percent of the trees. The clumps had one to 11 stems with stand medians between two and three. Multiple stems ...
