Filters: Tags: Community ecology (X)22 results (161ms)
Marine Water Quality, Water Temperature from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park, 2014-2016
This data is part of the Gulf Watch Alaska (GWA) long term monitoring program, nearshore monitoring component. The data consists of date, time, and temperature measurements from intertidal rocky sampling sites. The dataset is 5 comma separated files exported from a download from the HOBO temperature logger. Sites are in Alaska and include locations in Katmai National Park and Preserve, Kenai Fjords National Park and northern and western Prince William Sound. There are five sites in each of those areas. The time interval includes 2014-2016. Temperature loggers were set to record hourly. Each file is comprised of data from a single site from a given year. Loggers were re-used so the logger serial number is included...
Disturbance characteristics, vegetation and biocrust cover from the northern Great Basin (USA) 2012-2013
Fifteen fires from the Chronosequence dataset (see Knutson et al. 2014) were visited in 2012 and 2013 and surveyed for cover of lichens and mosses. Fires were selected to cover the range of average precipitation for each of three water years following fire, fire severity, time since fire, season of ignition, total acres burned and grazing intensity. Cattle grazing was characterized by distance from water sources for cattle, cow dung density counts and Animal Unit Months from the Rangeland Administration System of the Bureau of Land Management. Fire was characterized by whether or not a site burned, time since fire, the area burned, and an estimated amount of shrub cover consumed by the fire as compared to seemingly...
Marine Bird and Mammal Survey Data from Katmai National Park and Preserve and Kenai Fjords National Park, 2012-2016
These data are part of the Gulf Watch Alaska (GWA) long term monitoring program, nearshore monitoring component. The dataset is a series of comma separated files exported from a survey software program (DLog, Ford Consulting, Portland, OR). The data consists of date, time, latitude, longitude, species abbreviation, count, and behavior. Each year the observers attempt to sample the same set of transects although weather, tide state and other factors can interfere with this goal. Transects are in Alaska and include locations in Katmai National Park and Preserve and Kenai Fjords National Park. Other researchers conduct similar surveys in Prince William Sound. The time interval includes 2012-2016.
The 53 papers in this proceedings include a section celebrating the 25-year anniversary of the Shrub Sciences Laboratory (4 papers), three sections devoted to themes, genetics, and biodiversity (12 papers), disturbance ecology and biodiversity (14 papers), ecophysiology (13 papers), community ecology (9 papers), and field trip section (1 paper). The anniversary session papers emphasized the productivity and history of the Shrub Sciences Laboratory, 100 years of genetics, plant materials development for wildland shrub ecosystems, and current challenges in management and research in wildland shrub ecosystems. The papers in each of the thematic science sessions were centered on wildland shrub ecosystems. The field...
Benthic Community Dynamics in Coyote Creek and Artesian Slough, Southern San Francisco Bay, California, May 2016 to March 2018
Benthic invertebrate communities are monitored because the composition of those communities can affect and be affected by the water quality of an aquatic system. Benthic communities use and sometimes regulate the cycling of essential elements (for example, carbon). Benthic invertebrate taxa may also indicate acute and chronic stressors in an environment because they accumulate contaminants and can respond – sometimes dramatically - to oligotrophic and eutrophic conditions. Benthic communities affect water quality by grazing pelagic food resources and increasing the rate of nutrient regeneration through feeding and bioturbating sediments. South San Francisco Bay is a system dependent on phytoplankton as the base...
Seven exclosures that were part of the original 28 Taylor Grazing Act exclosures across northern Nevada were surveyed for cover of biological soil crusts in May 2018. Surveys consisted of 15 quadrats both inside and outside of the exclosures. Quadrats were used to measure biocrust cover via point-intercept at 39 vertices within each quadrat. Cattle grazing outside of the exclosures was characterized by distance from the closest water source as well as permitted, suspended and active Animal Unit Months from the Rangeland Administration System. Abundance of cyanobacteria in the soils was assessed with the moistened soil method.
A dataset of the macroinvertebrates collected for a trout production study from August 2017- August 2018 in northern New Mexico. The invertebrates are sampled from the benthos, drift, and trout stomachs (via gastric lavage). The drift and benthic invertebrate data represent subsampled individuals. There is a separate file that documents the percent of original sample. The diet samples were not subsampled. The dataset includes individual invertebrates identified to taxonomic Order, lifestage, habitat, their measured lengths, and regressed dry masses.
Eight-minute point-transect distance bird surveys were collected in and around Haleakala National Park from 1993-2008. This dataset contains the location, species, and distance to detected birds, as well as identifying initials to distinguish among observers.
Influence of a high head dam as a dispersal barrier to fish community structure of the Upper Mississippi River: Data
In 2013 and 2014, standardized electrofishing was conducted above and below Lock and Dam 19 (i.e., in Pools 19 and 20 respectively) of the Upper Mississippi River (UMR). Sampling was consistent with the UMR Restoration program’s Long Term Resource Monitoring element (LTRM) and The Illinois Natural History Survey’s Long Term Electrofishing program (LTEF) allowing for standardized comparisons among the reaches we sampled and those sampled by the LTRM (Pools 4, 8, 13, and 26) and LTEF (Pools 16-21, and Pool 25). Data in this file is includes A) new data from Pools 19 and 20 and B) data compiled from public sources for other pools (LTRM and LTEF). Generally, data codes are intended to match formatting conventions from...
This data represents a vegetation map for New River Gorge National River. It contains nonoverlapping polygons which represent vegetation classes, aquatic features, and cultural features. Vegetation types were classified based on statistical analysis of plot data collected on the ground from 1998 through 2005. Polygons were delineated based on interpretation of digital and hard copy aerial photography flown in 2003.
This data represents a vegetation map for Bluestone National Scenic River. It contains nonoverlapping polygons which represent vegetation classes, aquatic features, and cultural features. Vegetation types were classified based on statistical analysis of plot data collected on the ground from 2003 through 2005. Polygons were delineated based on interpretation of digital and hard copy aerial photography flown in 2003.
Geographic analysis of species richness and community attributes of forest birds from survey data in the Mid-Atlantic Integrated Assessment region
Marine Water Quality, Water Temperature from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park, 2006-2014
This data is part of the GulfWatch Alaska (GWA) long term monitoring program, benthic monitoring component. The data consists of date, time, and temperature measurements from intertidal rocky sampling sites. The site name is part of the file name. The dataset is several comma separated files exported from a download from the HOBO temperature logger. Sites are in Alaska and include locations in Katmai National Park and Preserve, Kenai Fjords National Park and eastern, northern, and western Prince William Sound. There are five sites in each of those areas. The time interval includes 2006-2015. As the temperature logging protocol was developed different monitoring intervals were used. Most temperature loggers were...
Insect and vegetation community composition and abundance after wildfire and restoration seeding treatments in southwestern Idaho, USA
We conducted the first investigation of insect community responses to post-fire seeding on public rangelands by comparing the composition of insect communities at burned-and-seeded (treatment) and burned-and-unseeded (control) sagebrush-steppe ecological sites in southwestern Idaho. Insect communities in burned areas were compared to unburned (reference) areas. We collected insect and vegetation data within and around the burn perimeter of the 2007 Murphy Fire (652,209 ha), 2002 Big Crow Fire (1,134 ha), and 1995 Clover Fire (78,102 ha) in southwestern Idaho, USA. We captured and identified 24,862 insects from 130 families at the three study sites in 2010. We used a nadir photogrid and point-centered quarter method...
Densities of Hexagenia spp. mayfly nymphs by age class are presented from 1999 through 2014. This range is significant in that it includes the year of peak abundance following recovery from ~4 decades of near extirpation (~1960 through the mid-1990s) through a period of decline. This range overlaps with fluctuations in abundance of other potentially relevant species, such as Round Goby and Dreissena spp. mussels. A novelty of these data is the separation of age classes, which provides for potentially novel approaches to assessing mayfly trends.
Benthic and Drift invertebrate samples were processed by two parties. Some of the samples were subsampled according to a standardized protocol in order to be processed more efficiently. This dataset includes the information that is necessary for "scaling up" the invertebrate data to concentration in square meters (benthic) or cubic meters (drift).
This data represents a vegetation map for Gauley River National Recreation Area. It contains nonoverlapping polygons which represent vegetation classes, aquatic features, and cultural features. Vegetation types were classified based on statistical analysis of plot data collected on the ground from 1995 through 2009. Polygons were delineated based on interpretation of digital and hard copy aerial photography flown in 2003. This data set was created by clipping the GARIvegetation feature class by the boundary of Gauley River National Recreation Area. Multipart polygons created by the clip operation were converted to single part polygons. Hectares and acres were calculated for each polygon using XTools.
These data represent a vegetation map for Vicksburg National Military Park and Vicksburg National Cemetery. The data consist of nonoverlapping polygons which represent National Vegetation Classification vegetation types, and non-vegetated land cover features. Vegetation types were classified based on analysis of plot data and supplemental observations collected on the ground from 2004 through 2010. Polygons were delineated based on interpretation of digital aerial photography flown in 2004 and terrian modeling. More detailed methodology is documented in Lea, Waltermire, and Nordman (2013).
Balance of Terror: An Alternative Mechanism for Competitive Trade-Offs and Its Implications for Invading Species
The Benthic Lab investigates the benthic community throughout the San Francisco Bay and Sacramento Delta.