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4 results for “Yellowstone Lake”
Ice timing (formation or ice-on and clearance or ice-off) for Yellowstone Lake, Wyoming, USA (1927-2022)
Lakes are sentinels of environmental change. In cold climates, lake ice phenology–the timing and duration of ice cover during winter–is a key control on ecosystem function. Ice phenology appears to be driven by a complex interplay between physical characteristics and climatic conditions. Under climate change, lakes are generally freezing later, melting out earlier, and experiencing a shorter duration of ice cover; however, few long-term records exist for large, high-elevation lakes which may be particularly vulnerable to climate impacts. Here, we provide an ice phenology data over the last century (1927-2022) for North America’s largest high-elevation lake—Yellowstone Lake.
Video S1 - Native Cutthroat Trout and the Yellowstone Lake Ecosystem
<p><strong>Video S1.</strong> The Yellowstone Lake ecosystem in Yellowstone National Park. Following glacial recession, cutthroat trout evolved as the sole salmonid and dominant fish within Yellowstone Lake and its connected river network. Yellowstone Lake is a large aquatic system on the Yellowstone Plateau (2,357 m in elevation) with a highly protected watershed (> 3200 km2) located within Yellowstone National Park and the Bridger-Teton Wilderness of Wyoming, USA. Powerboat access is limited to only two locations, and most of the shoreline lies in protected (federally proposed) wilderness. Thermal structure of the lake is typically unstable with a weak and variable thermocline at a depth of 12–15 m during July-September. Surface water temperatures rarely exceed 18°C. The lake freezes over by late December and can remain frozen until late May or early June. In winter, ice about 1 m thick covers much of the lake except where shallow water covers active hot springs. During spring (May-July), cutthroat trout spawn in tributaries around Yellowstone Lake, where they are important prey for grizzly bears, black bears, river otters, and numerous avian predators.</p>
Fish carcass deposition to suppress invasive lake trout through hypoxia causes limited, non-target effects on benthic invertebrates in Yellowstone Lake
<p class="MsoNormal">Invasive species can have negative effects on native biodiversity and ecosystem function, and suppression is often required to minimize the effects. However, management actions to suppress invasive species may cause negative, unintended effects on non-target taxa. Across the USA, lake trout (<em>Salvelinus namaycush</em>) are invasive in many freshwater ecosystems, reducing native fish abundance and diversity through predation and competition. In an integrated pest management approach, lake trout embryos in Yellowstone Lake, Wyoming are suppressed by depositing lake trout carcasses onto spawning sites; the carcasses reduce dissolved oxygen concentrations as they decay, causing embryo mortality. We conducted a field experiment during one ice-free season at four sites in Yellowstone Lake to investigate the non-target effects of carcass treatment on benthic invertebrates, which could have consequences for native fish diets. While overall invertebrate density and biomass did not respond to carcass treatment, Chironomidae midges and Sphaeriidae fingernail clams decreased in abundance. Carcass treatment altered invertebrate community structure based on density, but not biomass. Carcass treatment to suppress invasive fish embryos has spatially localized, non-target effects on some benthic invertebrate taxa. Given the small spatial extent of carcass treatment within the lake, we conclude it is unlikely that carcass treatment will alter food availability for native fishes.</p>
Fish carcass deposition to suppress invasive lake trout through hypoxia causes limited, non-target effects on benthic invertebrates in Yellowstone Lake
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