NDLI: Evidence for Acidification-Driven Ecosystem Collapse of Danish Erica tetralix Wet Heathland

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Evidence for Acidification-Driven Ecosystem Collapse of Danish Erica tetralix Wet Heathland

Content Provider	Springer Nature Link
Author	Strandberg, Morten Damgaard, Christian Degn, Hans Jørgen Bak, Jesper Nielsen, Knud Erik
Copyright Year	2012
Abstract	We report observations of disappearance of Erica tetralix in wet heathland, which is unlikely to be caused by competition, as E. tetralix is dying before its place is taken up by other species. To investigate the causes, we used both old and new data. Results showed that presence of Molinia caerulea and Calluna vulgaris were substantial in the former E. tetralix dominated areas. Measurements of the C/N ratio in the morlayer were between 21 and 26 under the E. tetralix stands. As the expected C/N ratio in a healthy nutrient poor ecosystem like the E. tetralix wet heathland is around 30, this indicates that the ratio is probably decreasing and, correspondingly, the probability of nitrogen leaching from the ecosystem is increasing. The morlayer pH was extremely low—between 3.03 and 3.78. This represents a pH decline since the 1960s, where pH values generally were above 4. This supports the hypothesis that the decrease in morlayer pH is the major factor explaining the disappearance of E. tetralix and that measures to increase pH should be considered as part of the recommendations for relevant future management.
Starting Page	393
Ending Page	401
Page Count	9
File Format	PDF
ISSN	00447447
Journal	AMBIO
Volume Number	41
Issue Number	4
e-ISSN	16547209
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-02-16
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Critical load Nitrogen deposition Management Cross-leaved heath Base cations Meteorology/Climatology Ecology Environmental Engineering/Biotechnology Environment Environmental Management Physical Geography
Content Type	Text
Resource Type	Article
Subject	Geography, Planning and Development Ecology Environmental Chemistry Medicine

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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
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