Weathering rates of bedrock by lichens: a mini watershed study
The chemical weathering rate of rock substrates by saxicolous lichens was measured quantitatively and compared with the weathering rate of bare rock in the Cone Pond area at Hubbard Brook Experimental Forest, USA. The experiments used mini watersheds (
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| Veröffentlicht in: | Chemical geology 2002-09, Vol.188 (3), p.249-259 |
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| creator | Aghamiri, Rasoul (Reza) Schwartzman, David W |
| description | The chemical weathering rate of rock substrates by saxicolous lichens was measured quantitatively and compared with the weathering rate of bare rock in the Cone Pond area at Hubbard Brook Experimental Forest, USA. The experiments used mini watersheds ( |
| doi_str_mv | 10.1016/S0009-2541(02)00105-5 |
| format | Article |
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2) on outcrops of mica–schist. A laboratory mini watershed experiment and a thin-section analysis were also conducted during the course of the study.
Computed cumulative flux ratios of the weathering rate of lichen covered versus bare-rock mini watersheds for Mg
2+ (16±7) and Si (4±0.3) were significant. The rate of denudation of the rock was calculated to be higher for the lichen mini watershed than the bare-rock mini watershed. A laboratory mini watershed experiment demonstrated the same trend of higher elemental fluxes for the lichen mini watershed than the bare-rock mini watershed for K
+, Mg
2+, Na
+ and Si. The weathering rind beneath the lichen was measured to be between 0.2 and 0.5 mm thick.
These results show the significance of biotic enhancement of chemical weathering. This research also calculated the rate of denudation of the rock by lichens and supported the mini watershed studies as a reliable method to study the chemical weathering by lichens, bryophytes and plants in thin soil and alpine areas.</description><identifier>ISSN: 0009-2541</identifier><identifier>EISSN: 1872-6836</identifier><identifier>DOI: 10.1016/S0009-2541(02)00105-5</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Bare-rock mini watershed ; Chemical weathering ; Cumulative flux ratio ; Laboratory mini watershed ; Lichen mini watershed ; Lichens ; Rate of denudation</subject><ispartof>Chemical geology, 2002-09, Vol.188 (3), p.249-259</ispartof><rights>2002 Elsevier Science B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a361t-f24e4d298389ec2fae6a12aaed68332f10e47f0aeb70be8624a8268ff350bc513</citedby><cites>FETCH-LOGICAL-a361t-f24e4d298389ec2fae6a12aaed68332f10e47f0aeb70be8624a8268ff350bc513</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/S0009-2541(02)00105-5$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Aghamiri, Rasoul (Reza)</creatorcontrib><creatorcontrib>Schwartzman, David W</creatorcontrib><title>Weathering rates of bedrock by lichens: a mini watershed study</title><title>Chemical geology</title><description>The chemical weathering rate of rock substrates by saxicolous lichens was measured quantitatively and compared with the weathering rate of bare rock in the Cone Pond area at Hubbard Brook Experimental Forest, USA. The experiments used mini watersheds (<1 m
2) on outcrops of mica–schist. A laboratory mini watershed experiment and a thin-section analysis were also conducted during the course of the study.
Computed cumulative flux ratios of the weathering rate of lichen covered versus bare-rock mini watersheds for Mg
2+ (16±7) and Si (4±0.3) were significant. The rate of denudation of the rock was calculated to be higher for the lichen mini watershed than the bare-rock mini watershed. A laboratory mini watershed experiment demonstrated the same trend of higher elemental fluxes for the lichen mini watershed than the bare-rock mini watershed for K
+, Mg
2+, Na
+ and Si. The weathering rind beneath the lichen was measured to be between 0.2 and 0.5 mm thick.
These results show the significance of biotic enhancement of chemical weathering. This research also calculated the rate of denudation of the rock by lichens and supported the mini watershed studies as a reliable method to study the chemical weathering by lichens, bryophytes and plants in thin soil and alpine areas.</description><subject>Bare-rock mini watershed</subject><subject>Chemical weathering</subject><subject>Cumulative flux ratio</subject><subject>Laboratory mini watershed</subject><subject>Lichen mini watershed</subject><subject>Lichens</subject><subject>Rate of denudation</subject><issn>0009-2541</issn><issn>1872-6836</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><recordid>eNqFkE1Lw0AQhhdRsFZ_grAn0UN0ZpNNth6UUvyCggcVj8tmM2tX06Tupkr_vWkrXj0NA8_7MvMwdoxwjoD5xRMAjBIhMzwFcQaAIBO5wwaoCpHkKs132eAP2WcHMb73K6ZSDtjVK5luRsE3bzyYjiJvHS-pCq394OWK197OqImX3PC5bzz_7pkQZ1Tx2C2r1SHbc6aOdPQ7h-zl9uZ5cp9MH-8eJuNpYtIcu8SJjLJKjFSqRmSFM5QbFMZQ1Z-XCodAWeHAUFlASSoXmVEiV86lEkorMR2yk23vIrSfS4qdnvtoqa5NQ-0yaiykUoiyB-UWtKGNMZDTi-DnJqw0gl7b0htbeq1Cg9AbW3qdu97mqP_iy1PQ0XpqLFU-kO101fp_Gn4AXjxw3w</recordid><startdate>20020901</startdate><enddate>20020901</enddate><creator>Aghamiri, Rasoul (Reza)</creator><creator>Schwartzman, David W</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope></search><sort><creationdate>20020901</creationdate><title>Weathering rates of bedrock by lichens: a mini watershed study</title><author>Aghamiri, Rasoul (Reza) ; Schwartzman, David W</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a361t-f24e4d298389ec2fae6a12aaed68332f10e47f0aeb70be8624a8268ff350bc513</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2002</creationdate><topic>Bare-rock mini watershed</topic><topic>Chemical weathering</topic><topic>Cumulative flux ratio</topic><topic>Laboratory mini watershed</topic><topic>Lichen mini watershed</topic><topic>Lichens</topic><topic>Rate of denudation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Aghamiri, Rasoul (Reza)</creatorcontrib><creatorcontrib>Schwartzman, David W</creatorcontrib><collection>CrossRef</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Chemical geology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Aghamiri, Rasoul (Reza)</au><au>Schwartzman, David W</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Weathering rates of bedrock by lichens: a mini watershed study</atitle><jtitle>Chemical geology</jtitle><date>2002-09-01</date><risdate>2002</risdate><volume>188</volume><issue>3</issue><spage>249</spage><epage>259</epage><pages>249-259</pages><issn>0009-2541</issn><eissn>1872-6836</eissn><abstract>The chemical weathering rate of rock substrates by saxicolous lichens was measured quantitatively and compared with the weathering rate of bare rock in the Cone Pond area at Hubbard Brook Experimental Forest, USA. The experiments used mini watersheds (<1 m
2) on outcrops of mica–schist. A laboratory mini watershed experiment and a thin-section analysis were also conducted during the course of the study.
Computed cumulative flux ratios of the weathering rate of lichen covered versus bare-rock mini watersheds for Mg
2+ (16±7) and Si (4±0.3) were significant. The rate of denudation of the rock was calculated to be higher for the lichen mini watershed than the bare-rock mini watershed. A laboratory mini watershed experiment demonstrated the same trend of higher elemental fluxes for the lichen mini watershed than the bare-rock mini watershed for K
+, Mg
2+, Na
+ and Si. The weathering rind beneath the lichen was measured to be between 0.2 and 0.5 mm thick.
These results show the significance of biotic enhancement of chemical weathering. This research also calculated the rate of denudation of the rock by lichens and supported the mini watershed studies as a reliable method to study the chemical weathering by lichens, bryophytes and plants in thin soil and alpine areas.</abstract><pub>Elsevier B.V</pub><doi>10.1016/S0009-2541(02)00105-5</doi><tpages>11</tpages></addata></record> |
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| language | eng |
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| source | Access via ScienceDirect (Elsevier) |
| subjects | Bare-rock mini watershed Chemical weathering Cumulative flux ratio Laboratory mini watershed Lichen mini watershed Lichens Rate of denudation |
| title | Weathering rates of bedrock by lichens: a mini watershed study |
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