70,068 Works

North Temperate Lakes LTER: Zooplankton - Madison Lakes Area 1997 - current

NTL Lead PI, John Magnuson, Stephen Carpenter & Emily Stanley
Zooplankton samples for the 4 southern Wisconsin LTER lakes (Mendota, Monona, Wingra, Fish) have been collected for analysis by LTER since 1995 (1996 Wingra, Fish) when the southern Wisconsin lakes were added to the North Temperate Lakes LTER project. Samples are collected as a vertical tow using an 80-micron mesh conical net with a 30-cm diameter opening (net mouth: net length ratio = 1:3) consistent with sampling conducted by the Wisconsin Dept. Natural Resources in...

Plum Island Ecosystems site, station Essex County, MA (FIPS 25009), study of county area in units of squareKilometers on a yearly timescale

Inter-University Consortium For Political And Social Research, U.S. Bureau Of The Census, Michael R. Haines, Christopher Boone, Ted Gragson, Nichole Rosamilia & EcoTrends Project

Local plant diversity and soybean biological control 2011 Aphid and Enemy Surveys:Biodiversity II: Effects of Plant Biodiversity on Population and Ecosystem Processes

Margaret Kosmala
Biodiversity II (E120) is designed to determine how the number of plant species affects the dynamics of ecological processes at the population, community, and ecosystem levels. By experimentally manipulating the number of species and the kinds of species, the amount of plant growth and the change from year to year, that result can be examined. Plots are large (9m x 9m actively maintained) and well-replicated, allowing responses of plant pathogens, insect herbivores, seed predators, soil...

Genetic Diversity, Ecological Niches, and Climate Change Vulnerability of Aspens in the Upper Midwest:Leaf phenology

Nicholas Deacon
Quaking aspen (Populus tremuloides) is the most cosmopolitan tree species in North America and an important native at Cedar Creek and across the Midwest. Aspen stands are quite common through eastern, central, and northern Minnesota, and occur sporadically in cool, wet microclimates across the Great Plains. Currently, these stands are in decline, are poorly reproducing in the wild, and are suffering from a range of stresses. Climate change associated phenomena, drought and altered freeze-thaw cycles,...

Caspar Creek Experimental Watershed site, station South Fork Caspar Creek, study of mean daily streamflow in units of litersPerSecond on a yearly timescale

Caspar Creek Experimental Watershed, Climate And Hydrology Database Projects (CLIMDB/HYDRODB), EcoTrends Project & EcoTrends Project Coordinator

Chronic Nitrogen Amendment Experiment at Harvard Forest since 1988

Serita Frey & Scott Ollinger
The purpose of this study is to increase our understanding of ecosystem nitrogen dynamics in response to elevated nitrogen inputs. With atmospheric nitrogen deposition in the Northeastern United States currently at 10 to 20 times above historic background levels, it is possible that excessive nitrogen inputs could saturate the retention capacity of a forest ecosystem. Potential effects of nitrogen saturation include increased nitrate leaching and simultaneous base cation losses, soil acidification, altered fluxes of trace...

California Current Ecosystem site, station Orange County, CA (FIPS 6059), study of population employed in manufacturing (percent of total) in units of percent on a yearly timescale

Ted Gragson, Inter-University Consortium For Political And Social Research, Michael R. Haines, U.S. Bureau Of The Census, Christopher Boone, Nichole Rosamilia & EcoTrends Project

North Temperate Lakes site, station Iron County, WI (FIPS 55051), study of population employed at farms (percent of total) in units of percent on a yearly timescale

Inter-University Consortium For Political And Social Research, Ted Gragson, Associate Professor, Nichole Rosamilia, University Of Georgia Department Of Anthropology, Christopher Boone, School Of Human Evolution & Social Change And The Global Institute For Sustainability, Associate Professor, U.S. Bureau Of The Census, Michael R. Haines, Inter-University Consortium For Political And Social Research, EcoTrends Project & EcoTrends Project Coordinator

SBC LTER: Beach: Time-series of beach wrack consumers, ongoing since 2011

Santa Barbara Coastal LTER & Jenifer E Dugan
These data contain the composition, count, and wet biomass of macroinvertebrates along intertidal transects at five selected sandy beaches of the mainland coast of the Santa Barbara Channel. Data collection began in 2012 and is ongoing. This dataset is updated annually. Macroinvertebrates were collected from uniformly spaced cores along the shore-normal transects also used for physical measurements and macrophyte wrack sampling. Cores were pooled and animals and organic material sieved. In the laboratory, all macroinvertebrate...

Tussock watershed thaw depth survey summary for 1990 to present, Arctic Long-Term Ecological Research (LTER), Toolik Research Station, Alaska.

George Kling
Thaw depth was measured since 1990 using a steel probe in the Tussock watershed just south of Toolik Lake, Alaska, on a gentle slope dominated by moist, non-acidic tussock tundra. At least two surveys are conducted each summer, on 2 July and on 11 August (plus or minus 1 day).

Hubbard Brook Experimental Forest: 5 meter LiDAR-derived Topographic Metrics, 2018

Olivia Fraser, Kevin J McGuire & Scott W. Bailey
This data package contains 5 m LiDAR-derived topographic metrics across Hubbard Brook EF following the approach reported by (Gillin et al., 2015). The LiDAR was collected during leaf-off and snow-free conditions by Photo Science, Inc. in April 2012 for the White Mountain National Forest (WMNF). These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained...

Canopy Trimming Experiment (CTE) plant seedling measurements

Jess Zimmerman
Seedlings were measured before and after treatments to determine how alterations in canopy openness and detritus affect seedling densities and life histories (growth, mortality, recruitment). It was predicted that plots experiencing canopy openness with detritus removed would have the quickest increase in seedlings (recruitment and growth), especially of early successional (light demanding) species, such as Cecropia. Seedlings in plots that received no canopy manipulation but had detritus deposited is predicted to have near-total mortality initially...

Social and Heat Vulnerability Indices in Phoenix, Arizona

Mary Wright, Lance Watkins, David Hondula, Liza Kurtz, Paul Chakalian, Sharon Harlan & Juan Declet-Barreto
Vulnerability indices and maps are commonly employed by researchers and practitioners to assess hazard risk by combining variables that are theoretically or empirically associated with hazard outcomes and spatially visualizing those combined variables. For this dataset, we followed established methods to produce two vulnerability indices for 358 census tracts in the City of Phoenix, Arizona for the year 2016: the all-hazards Social Vulnerability Index (SoVI) and a specific hazards Heat Vulnerability Index (HVI). For SoVI,...

Genetic Diversity, Ecological Niches, and Climate Change Vulnerability of Aspens in the Upper Midwest:Leaf gas exchange

Nicholas Deacon
Quaking aspen (Populus tremuloides) is the most cosmopolitan tree species in North America and an important native at Cedar Creek and across the Midwest. Aspen stands are quite common through eastern, central, and northern Minnesota, and occur sporadically in cool, wet microclimates across the Great Plains. Currently, these stands are in decline, are poorly reproducing in the wild, and are suffering from a range of stresses. Climate change associated phenomena, drought and altered freeze-thaw cycles,...

Harvard Forest site, station Suffolk County, NY (FIPS 36103), study of number of farms in units of number on a yearly timescale

Christopher Boone, School Of Human Evolution & Social Change And The Global Institute For Sustainability, Associate Professor, Inter-University Consortium For Political And Social Research, Ted Gragson, Associate Professor, U.S. Bureau Of The Census, Nichole Rosamilia, University Of Georgia Department Of Anthropology, Michael R. Haines, Inter-University Consortium For Political And Social Research, EcoTrends Project & EcoTrends Project Coordinator

Genetic Diversity, Ecological Niches, and Climate Change Vulnerability of Aspens in the Upper Midwest:Cavitation

Nicholas Deacon
Quaking aspen (Populus tremuloides) is the most cosmopolitan tree species in North America and an important native at Cedar Creek and across the Midwest. Aspen stands are quite common through eastern, central, and northern Minnesota, and occur sporadically in cool, wet microclimates across the Great Plains. Currently, these stands are in decline, are poorly reproducing in the wild, and are suffering from a range of stresses. Climate change associated phenomena, drought and altered freeze-thaw cycles,...

Genetic Diversity, Ecological Niches, and Climate Change Vulnerability of Aspens in the Upper Midwest:Leaf osmotic potential and stomatal pore index

Nicholas Deacon
Quaking aspen (Populus tremuloides) is the most cosmopolitan tree species in North America and an important native at Cedar Creek and across the Midwest. Aspen stands are quite common through eastern, central, and northern Minnesota, and occur sporadically in cool, wet microclimates across the Great Plains. Currently, these stands are in decline, are poorly reproducing in the wild, and are suffering from a range of stresses. Climate change associated phenomena, drought and altered freeze-thaw cycles,...

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