NDLI: Initial effects of experimental warming on above- and belowground components of net ecosystem CO2 exchange in arctic tundra

Content Provider	Springer Nature Link
Author	Grogan, P. Chapin III, F.S.
Copyright Year	2000
Abstract	The Arctic contains extensive soil carbon reserves that could provide a substantial positive feedback to atmospheric CO2 concentrations and global warming. Evaluation of this hypothesis requires a mechanistic understanding of the in situ responses of individual components of tundra net ecosystem CO2 exchange (NEE) to warming. In this study, we measured NEE, total ecosystem respiration and respiration from below ground in experimentally warmed plots within Alaskan acidic tussock tundra. Soil warming of 2–4°C during a single growing season caused strong increases in total ecosystem respiration and belowground respiration from moss-dominated inter-tussock areas, and similar trends from sedge-dominated tussocks. Consequently, the overall effect of the manipulation was to substantially enhance net ecosystem carbon loss during mid-summer. Components of vascular plant biomass were closely correlated with total ecosystem respiration and belowground respiration in control plots of both microsites, but not in warmed plots. By contrast, in the warmed inter-tussock areas, belowground respiration was most closely correlated with organic-layer depth. Warming in tussock areas was associated with increased leaf nutrient pools, indicating enhanced rates of soil nutrient mineralisation. Together, these results suggest that warming enhanced net ecosystem CO2 efflux primarily by stimulating decomposition of soil organic matter, rather than by increasing plant-associated respiration. Our short-term experiment provides field evidence to support previous growth chamber and modelling studies indicating that arctic soil C reserves are relatively sensitive to warming and could supply an initial positive feedback to rising atmospheric CO2 concentrations/changing climate.
Starting Page	512
Ending Page	520
Page Count	9
File Format	PDF
ISSN	00298549
Journal	Oecologia
Volume Number	125
Issue Number	4
e-ISSN	14321939
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2000-12-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Carbon Climate Feedback Nutrients Respiration Ecology Plant Sciences Hydrology/Water Resources
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Environmental and Vegetation Drivers of Seasonal CO2 Fluxes in a Sub-arctic Forest–Mire Ecotone

Warming Effects on Ecosystem Carbon Fluxes Are Modulated by Plant Functional Types

A meta-analysis of the response of soil respiration, net nitrogen mineralization, and aboveground plant growth to experimental ecosystem warming

Nonlinear CO₂ flux response to 7 years of experimentally induced permafrost thaw

Long-term Impacts of Contrasting Management of Large Ungulates in the Arctic Tundra-Forest Ecotone: Ecosystem Structure and Climate Feedback

Respiration of recently-fixed plant carbon dominates mid-winter ecosystem co2 production.

Coupled long-term summer warming and deeper snow alters species composition and stimulates gross primary productivity in tussock tundra

Identifying Differences in Carbon Exchange among Arctic Ecosystem Types

Terrestrial Carbon–Cycle Feedback to Climate Warming

Initial effects of experimental warming on above- and belowground components of net ecosystem CO2 exchange in arctic tundra

Similar Documents

Environmental and Vegetation Drivers of Seasonal CO2 Fluxes in a Sub-arctic Forest–Mire Ecotone

Warming Effects on Ecosystem Carbon Fluxes Are Modulated by Plant Functional Types

A meta-analysis of the response of soil respiration, net nitrogen mineralization, and aboveground plant growth to experimental ecosystem warming

Nonlinear CO2 flux response to 7 years of experimentally induced permafrost thaw

Long-term Impacts of Contrasting Management of Large Ungulates in the Arctic Tundra-Forest Ecotone: Ecosystem Structure and Climate Feedback

Respiration of recently-fixed plant carbon dominates mid-winter ecosystem co2 production.

Coupled long-term summer warming and deeper snow alters species composition and stimulates gross primary productivity in tussock tundra

Identifying Differences in Carbon Exchange among Arctic Ecosystem Types

Terrestrial Carbon–Cycle Feedback to Climate Warming

Initial effects of experimental warming on above- and belowground components of net ecosystem CO2 exchange in arctic tundra

Nonlinear CO₂ flux response to 7 years of experimentally induced permafrost thaw