69,907 Works

Fire Severity Estimates: 2001 Survey Line Burn

Justin Epting, Dave L. Verbyla & Bonanza Creek LTER
Field-based estimates of fire severity for 85 plots located near the Tanana River in the Survey Line Burn. Composite Burn Index estimates were taken during June-August 2002. The locations of each plot are stored as differentially corrected GPS files and as an ArcGIS point shapefile. Digital aerial photography of the post-fire area from August and September 2002 are in the data base. Database also includes remotely sensed fire severity indices of the entire Survey Line...

Soil nitrogen cycling in a boreal hardwood forest in relation to the phenolic compound bearing species Ledum palustre

David W. Valentine & Bonanza Creek LTER
Ledum palustre (Labrador tea) is a late successional evergreen shrub widely distributed in boreal ecosystems that readily leaches high concentrations of soluble phenolic compounds into water. We selected this species in order to study whether leaf leachates could be responsible for the effects of plant canopy on N cycling under natural conditions. Organic matter content, soil respiration and net N mineralization were measured in organic and mineral soil horizons and gross N mineralization was also...

Eight Mile Lake Research Watershed, Thaw Gradient: Seasonal thaw depth 2004-2018

Elaine F. Pegoraro, Marguerite Mauritz, Jack A. Hutchings, Susan M.N. Natali, Edward A.G. Schuur & Bonanza Creek LTER
In this larger study, we are asking the question: Is old carbon that comprises the bulk of the soil organic matter pool released in response to thawing of permafrost? We are answering this question by using a combination of field and laboratory experiments to measure net carbon exchange, radiocarbon isotope ratios in soil organic matter, soil respiration, and dissolved organic carbon, in tundra ecosystems. The objective of these proposed measurements is to develop a mechanistic...

Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating and Drying Research (DryPEHR): Weekly thaw depth data, 2011-2018

Elaine F. Pegoraro, Marguerite Mauritz, Jack A. Hutchings, Susan M.N. Natali, Edward A.G. Schuur & Bonanza Creek LTER
This drying and warming experiment addresses the following questions: 1) Does ecosystem drying, warming and permafrost thaw cause a net release or uptake of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C that comprises the bulk of the soil C pool influence ecosystem C loss? 3) How do drying and warmign affect plant communities and ecosystem properties? We are answering these questions using a combined warming and drying experiment...

Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating Research (CiPEHR): Weekly thaw depth data, 2009-2018

Elaine F. Pegoraro, Marguerite Mauritz, Jack A. Hutchings, Susan M.N. Natali, Edward A.G. Schuur & Bonanza Creek LTER
The Carbon in Permafrost Experimental Heating Research (CiPEHR) project addresses the following questions: 1) Does ecosystem warming cause a net release of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C that comprises the bulk of the soil C pool influence ecosystem C loss?, and 3) How do winter and summer warming alone, and in combination, affect ecosystem C exchange? We are answering these questions using a combination of field...

Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating Research (CiPEHR): Half-hourly growing season, chamber-based, CO2 flux data, 2009-2018

Marguerite Mauritz, Meghan Taylor, Justin Ledman, Susan M.N. Natali, Edward A.G. Schuur & Bonanza Creek LTER
FIELD: Carbon dioxide fluxes (net ecosystem carbon exchange, NEE) were measured from May through September using 24 automated dynamics flux chambers, located at the CiPEHR project. Carbon dioxide concentrations were measured using a LiCOR-820 infrared gas analyzer and data were stored to a Campbell Scientific CR1000 data logger. Detailed information on the flux system and data processing can be found in Natali et al. 2011 (GCB). The 24 flux chambers were rotated weekly between 66...

Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating and Drying Research (DryPEHR): Growing season, chamber-based, CO2 flux data, 2009-2018

Marguerite Mauritz, Meghan Taylor, Justin Ledman, Susan M.N. Natali, Edward A.G. Schuur & Bonanza Creek LTER
This drying and warming experiment addresses the following questions: 1) Does ecosystem drying, warming and permafrost thaw cause a net release or uptake of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C that comprises the bulk of the soil C pool influence ecosystem C loss? 3) How do drying and warming affect plant communities and ecosystem properties? We are answering these questions using a combined warming and drying experiment...

Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating Research (CiPEHR): Phenology of Dominant Plant Species III - Flowering Date 2013-2018

Heidi G Rodenhizer, Marguerite Mauritz, Meghan Taylor, Justin Ledman, Susan M.N. Natali, Edward A.G. Schuur & Bonanza Creek LTER
The Carbon in Permafrost Experimental Heating Research (CiPEHR) project addresses the following questions: 1) Does ecosystem warming cause a net release of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C, that comprises the bulk of the soil C pool, influence ecosystem C loss?, and 3) How do winter and summer warming alone, and in combination, affect ecosystem C exchange? We are answering these questions using a combination of field...

Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating Research (CiPEHR): Phenology of Dominant Plant Species II - Berry Production 2013-2018

Heidi G Rodenhizer, Marguerite Mauritz, Meghan Taylor, Justin Ledman, Susan M.N. Natali, Edward A.G. Schuur & Bonanza Creek LTER
The Carbon in Permafrost Experimental Heating Research (CiPEHR) project addresses the following questions: 1) Does ecosystem warming cause a net release of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C, that comprises the bulk of the soil C pool, influence ecosystem C loss?, and 3) How do winter and summer warming alone, and in combination, affect ecosystem C exchange? We are answering these questions using a combination of field...

Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating Research (CiPEHR): Phenology of Dominant Plant Species I - Bud burst and Senescence 2013-2018

Heidi G Rodenhizer, Marguerite Mauritz, Meghan Taylor, Justin Ledman, Susan M.N. Natali, Edward A.G. Schuur & Bonanza Creek LTER
The Carbon in Permafrost Experimental Heating Research (CiPEHR) project addresses the following questions: 1) Does ecosystem warming cause a net release of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C, that comprises the bulk of the soil C pool, influence ecosystem C loss?, and 3) How do winter and summer warming alone, and in combination, affect ecosystem C exchange? We are answering these questions using a combination of field...

Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating and Drying Research (DryPEHR): Phenology of Dominant Plant Species III - Flowering Date 2013-2018

Heidi G Rodenhizer, Marguerite Mauritz, Meghan Taylor, Justin Ledman, Susan M.N. Natali, Edward A.G. Schuur & Bonanza Creek LTER
This drying and warming experiment addresses the following questions: 1) Does ecosystem drying, warming and permafrost thaw cause a net release or uptake of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C that comprises the bulk of the soil C pool influence ecosystem C loss? 3) How do drying and warming affect plant communities and ecosystem properties? We are answering these questions using a combined warming and drying experiment...

Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating and Drying Research (DryPEHR): Phenology of Dominant Plant Species II - Berry Production 2013-2018

Heidi G Rodenhizer, Marguerite Mauritz, Meghan Taylor, Justin Ledman, Susan M.N. Natali, Edward A.G. Schuur & Bonanza Creek LTER
This drying and warming experiment addresses the following questions: 1) Does ecosystem drying, warming and permafrost thaw cause a net release or uptake of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C that comprises the bulk of the soil C pool influence ecosystem C loss? 3) How do drying and warming affect plant communities and ecosystem properties? We are answering these questions using a combined warming and drying experiment...

Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating and Drying Research (DryPEHR): Phenology of Dominant Plant Species I - Bud burst and Senescence 2013-2018

Heidi G Rodenhizer, Marguerite Mauritz, Meghan Taylor, Justin Ledman, Susan M.N. Natali, Edward A.G. Schuur & Bonanza Creek LTER
This drying and warming experiment addresses the following questions: 1) Does ecosystem drying, warming and permafrost thaw cause a net release or uptake of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C that comprises the bulk of the soil C pool influence ecosystem C loss? 3) How do drying and warming affect plant communities and ecosystem properties? We are answering these questions using a combined warming and drying experiment...

Porewater nutrient concentrations from control plots at a Typha sp. dominated brackish marsh on the Upper Parker River, Plum Island Ecosystem LTER, MA.

Jim Morris, Karen Sundberg & Plum Island Ecosystems LTER
Porewater samples from a Typha sp.-dominated brackish marsh on the Upper Parker River in the Plum Island Ecosystem (PIE) LTER site were analyzed for ammonium, phosphate, sulfide and chloride concentrations.

Porewater nutrient concentrations from control plots at a Spartina patens-dominated salt marsh at Law's Point, Rowley River, Plum Island Ecosystem LTER, MA.

Jim Morris, Karen Sundberg & Plum Island Ecosystems LTER
Porewater samples from a Spartina patens-dominated salt marsh on the Rowley River in the Plum Island Ecosystem (PIE) LTER site were analyzed for ammonium, phosphate, sulfide and chloride concentrations.

Porewater nutrient concentrations from control plots at a Spartina alterniflora-dominated salt marsh at Law's Point, Rowley River, Plum Island Ecosystem LTER, MA.

Jim Morris, Karen Sundberg & Plum Island Ecosystems LTER
Porewater samples from a Spartina alterniflora-dominated salt marsh on the Rowley River in the Plum Island Ecosystem (PIE) LTER site were analyzed for ammonium, phosphate, sulfide and chloride concentrations.

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