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Dataset results
219 results for “Asclepias”
Kellogg Biological Station site, station Treatment 8, never plowed, 200 meters (m) south of the others, that serves as an historical control for soil organic matter studies, study of aboveground net primary productivity of Asclepias syriaca in units of gramsPerMeterSquaredPerYear on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Kellogg Biological Station (KBS) contains aboveground net primary productivity of Asclepias syriaca measurements in gramsPerMeterSquaredPerYear units and were aggregated to a yearly timescale.
Kellogg Biological Station site, station Kellogg Biological Station, study of aboveground net primary productivity of Asclepias syriaca in units of gramsPerMeterSquaredPerYear on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Kellogg Biological Station (KBS) contains aboveground net primary productivity of Asclepias syriaca measurements in gramsPerMeterSquaredPerYear units and were aggregated to a yearly timescale.
Reproduction data for Asclepias tuberosa: BioCON : Biodiversity, Elevated CO2, and N Enrichment
BioCON (Biodiversity, CO2, and Nitrogen) is an ecological experiment started in 1997 at the University of Minnesota's Cedar Creek Ecosystem Science Reserve. BioCON's goal is to explore the ways in which plant communities will respond to three environmental changes that are known to be occurring on a global scale: increasing nitrogen deposition, increasing atmospheric CO2, and decreasing biodiversity. Why Biodiversity, CO2, and Nitrogen? While there are many uncertainties in global change biology, there are also some well documented facts. Some of these are: 1. The amount of carbon dioxide (CO2) in the atmosphere is rising. Since the industrial revolution, the CO2 concentration in the atmosphere has increased from approximately 275 parts per million (ppm) to about 378 ppm today. This has been largely the result of fossil fuel burning. It is expected that CO2 levels will continue to rise, and that by the year 2050 these levels will be approximately 550 ppm. CO2 is the raw material for photosynthesis and is known to affect plant growth and development. 2. The amount of nitrogen moving through terrestrial ecosystems has increased in the recent past. While natural "background" levels of nitrogen fixation have remained constant, human additions to the system through fertilizer production and fossil fuel use have increased dramatically. Nitrogen is a key nutrient for plant growth and plays a critical role in plant community structure and composition in many environments. 3. Biodiversity levels are falling. While the research and data are not as complete as they are for CO2 and nitrogen, data indicate that the number of species globally, is being reduced. Perhaps more important for ecosystem function, diversity levels on local to regional scales have fallen due to land use change, biotic invasion and many other drivers. While much is known about how each of these factors affects ecosystem functioning, many questions remain. There is also little data on how these issues affe
Fig. 1 in The Occurrence and Behaviors of North American Fireflies (Coleoptera: Lampyridae) on Milkweed, Asclepias syriaca L.
Fig. 1. Seasonal presence of Photinus pyralis and Pyropyga minuta exhibiting nectaring behaviors and active mouthing on milkweed. Two Photuris sp. and one Photinus cooki were observed on milkweed 7 and 8 July only.
Figs. 2–6 in The Occurrence and Behaviors of North American Fireflies (Coleoptera: Lampyridae) on Milkweed, Asclepias syriaca L.
Figs. 2–6. Fireflies on common milkweed. 2) Female Photinus pyralis nectaring bloom; 3) Photuris sp. sipping from stigmatic slit. Photograph by C. Hanrahan; 4) Photinus pyralis actively mouthing leaf; 5) Milkweed pollinia (arrow) on front left femur of Pyropyga minuta; 6) Photuris quadrifulgens larvae hollowing out center of milkweed rhizome.
Asclepias purpurascens (Asclepiadaceae) - inflorescence - frontal view of flower
Image of Asclepias purpurascens (Asclepiadaceae) - inflorescence - frontal view of flower
Asclepias purpurascens (Asclepiadaceae) - stem - showing leaf bases
Image of Asclepias purpurascens (Asclepiadaceae) - stem - showing leaf bases
Asclepias purpurascens (Asclepiadaceae) - inflorescence - lateral view of flower
Image of Asclepias purpurascens (Asclepiadaceae) - inflorescence - lateral view of flower
Asclepias purpurascens (Asclepiadaceae) - stem - unspecified
Image of Asclepias purpurascens (Asclepiadaceae) - stem - unspecified
Asclepias purpurascens (Asclepiadaceae) - leaf - on upper stem
Image of Asclepias purpurascens (Asclepiadaceae) - leaf - on upper stem
Asclepias quadrifolia (Asclepiadaceae) - whole plant - in flower - general view
Image of Asclepias quadrifolia (Asclepiadaceae) - whole plant - in flower - general view
Asclepias quadrifolia (Asclepiadaceae) - inflorescence - frontal view of flower
Image of Asclepias quadrifolia (Asclepiadaceae) - inflorescence - frontal view of flower
Asclepias quadrifolia (Asclepiadaceae) - leaf - on upper stem
Image of Asclepias quadrifolia (Asclepiadaceae) - leaf - on upper stem
Asclepias quadrifolia (Asclepiadaceae) - inflorescence - whole - unspecified
Image of Asclepias quadrifolia (Asclepiadaceae) - inflorescence - whole - unspecified
Asclepias quadrifolia (Asclepiadaceae) - inflorescence - frontal view of flower
Image of Asclepias quadrifolia (Asclepiadaceae) - inflorescence - frontal view of flower
Asclepias quadrifolia (Asclepiadaceae) - inflorescence - lateral view of flower
Image of Asclepias quadrifolia (Asclepiadaceae) - inflorescence - lateral view of flower
Asclepias quadrifolia (Asclepiadaceae) - leaf - on upper stem
Image of Asclepias quadrifolia (Asclepiadaceae) - leaf - on upper stem
Asclepias quadrifolia (Asclepiadaceae) - inflorescence - lateral view of flower
Image of Asclepias quadrifolia (Asclepiadaceae) - inflorescence - lateral view of flower
Asclepias purpurascens (Asclepiadaceae) - stem - showing leaf bases
Image of Asclepias purpurascens (Asclepiadaceae) - stem - showing leaf bases
Asclepias purpurascens (Asclepiadaceae) - fruit - juvenile
Image of Asclepias purpurascens (Asclepiadaceae) - fruit - juvenile
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