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Comma-separated values (.csv) file containing data related to mercury concentrations in dragonfly samples from U.S. National Parks collected as part of the Dragonfly Mercury Project (DMP). This data release supersedes Eagles-Smith, C.A., Nelson, S.J., Flanagan-Pritz, C.M., Willacker Jr., J.J., and Klemmer, A.J., 2018, Total mercury concentrations in dragonfly larvae from U.S. national parks (ver. 8.0, December 2022): U.S. Geological Survey data release, https://doi.org/10.5066/P9TK6NPT. Please contact fresc_outreach@usgs.gov for access.
Categories: Data, Data Release - Revised; Tags: Acadia National Park, Allegheny Portage Railroad National Historic Site, Amistad National Recreation Area, Apostle Islands National Lakeshore, Appomattox Court House National Historical Park, All tags...
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This spreadsheet compiles all longitudinal survey data collected along Redwood Creek during the thirty year period, 1977-2007. Long-term surveys were conducted along three reaches of Redwood Creek: Elam to Hayes creek reach, Dolason to Wier (Emerald) creek reach, and Bond to 44 creek reach. Longitudinal streambed surveys follow the channel thalweg (deepest point) and are useful in documenting aquatic habitat conditions (for example, pool depth distribution, percent length in riffles vs pools). Each of these surveys was conducted in the summer months of each recorded year and took about two weeks to complete.
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Comma-separated values (.csv) files containing data related to a National-scale assessment of mercury bioaccumulation in the US National Parks using dragonfly larvae as biosentinels through a citizen science framework.
Categories: Data; Tags: Acadia National Park, Allegheny Portage Railroad National Historic Site, Apostle Islands National Lakeshore, Appomattox Court House National Historical Park, Aquatic Biology, All tags...
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Comma-separated values (.csv) file containing data related to mercury and biogeochemical parameters in surface water and aquatic sediment collected from U.S. National Parks in 2014-2015.
Categories: Data, Data Release - Revised; Tags: Acadia National Park, Big Bend National Park, Big Cypress National Park, Big Thicket National Preserve, Cape Cod National Seashore, All tags...
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This data set compiles all cross-sectional survey data collected along Redwood Creek during the sixty year period, 1953-2013 (note that no surveys were conducted between 1954 and 1972). Cross-sectional surveys are transects perpendicular to channel flow and are used to document sedimentation and erosion (scour and fill) in river channel beds and on streambanks.
On September 6-7, 2013, 30 redwoods researchers, managers, and experts attended a workshop to share information and develop preliminary strategies to manage redwoods for persistence under climate change. Our discussion revolved around existing goals and objectives, current and future trends (including climate change projections), and how to manage for resilience, resistance, and transition. After the workshop, participants were invited on a field trip to learn about restoration efforts in Redwood National Park aimed at restoring previously harvested areas to conditions resembling mature redwood forest composition.
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Dr. Richard Janda of the USGS began a channel monitoring program in Redwood Creek in northern coastal California in 1973. The USGS continued this work through 2013, when the Research Geologist, Dr. Mary Madej retired. This effort produced 40 years of channel change data in rivers that were disrupted by severe erosion following timber harvest of old-growth redwood forests, a portion of the program's data (plus 1953 data) has been preserved in this data release. Original field surveys documented bank erosion, aggradation, and degradation at 60 cross-sectional transects at annual or biannual timesteps. Three river reaches also have long-term longitudinal channel bed surveys which document the distribution and development...
Coast redwoods (Sequoia sempervirens) and their many associated species create an iconic ecosystem, yet the impacts of stressors, including a variety of land use practices and climate change, threaten their continued persistence on the landscape. In September 2013, we held a workshop with researchers, managers, and other redwoods experts to explore the likely impacts of climate change and develop some initial strategies for adaptation. Workshop participants from diverse backgrounds identified four primary strategies to increasing the resilience of redwood ecosystems in the face of climate change. These included (1) restoring old-growth characteristics that protect stands from many stressors; (2) improving connectivity...


    map background search result map search result map River Channel Survey Data, Redwood Creek, California, 1953-2013 River Channel Survey Data, Redwood Creek, California, 1953-2013: Cross-Sectional Data River Channel Survey Data, Redwood Creek, California, 1977-2007: Longitudinal Profile Data Total mercury concentrations in dragonfly larvae from U.S. national parks (ver. 9.0, November 2023) Mercury Bioaccumulation in US National Parks Using Dragonfly Larvae as Biosentinels, 2009-2018 Mercury and biogeochemical parameters in surface water and sediment from U.S. National Parks, 2014-2015 (ver. 2.0, December 2023) Mercury and biogeochemical parameters in surface water and sediment from U.S. National Parks, 2014-2015 (ver. 2.0, December 2023) Mercury Bioaccumulation in US National Parks Using Dragonfly Larvae as Biosentinels, 2009-2018 Total mercury concentrations in dragonfly larvae from U.S. national parks (ver. 9.0, November 2023)