Patch dynamics of the stream macrophyte, Callitriche cophocarpa
SUMMARY 1. We examined changes in position and growth of Callitriche cophocarpa patches in a shallow section of a small Danish stream during the main expansion of plant cover between April and June. Mean upstream growth of patches was only 7.5% of downstream growth. The mean growth rate was 1,02cm d...
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| Veröffentlicht in: | Freshwater biology 1992-04, Vol.27 (2), p.277-282 |
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| container_title | Freshwater biology |
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| creator | KAJ SANG-JENSEN VINDBAEK MADSEN, T |
| description | SUMMARY
1. We examined changes in position and growth of Callitriche cophocarpa patches in a shallow section of a small Danish stream during the main expansion of plant cover between April and June. Mean upstream growth of patches was only 7.5% of downstream growth. The mean growth rate was 1,02cm day−1 in length and 0.55 cm day−1 in width and the growth rates were not significantly dependent on patch size. For patches with an area (A) above 100cm2, the growth rates in patch area (dA/dt) was proportional to patch circumference and thus √Aand the relative growth rate (dA/dt A−1) was inversely proportional to √A.The smallest patches ( |
| doi_str_mv | 10.1111/j.1365-2427.1992.tb00539.x |
| format | Article |
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1. We examined changes in position and growth of Callitriche cophocarpa patches in a shallow section of a small Danish stream during the main expansion of plant cover between April and June. Mean upstream growth of patches was only 7.5% of downstream growth. The mean growth rate was 1,02cm day−1 in length and 0.55 cm day−1 in width and the growth rates were not significantly dependent on patch size. For patches with an area (A) above 100cm2, the growth rates in patch area (dA/dt) was proportional to patch circumference and thus √Aand the relative growth rate (dA/dt A−1) was inversely proportional to √A.The smallest patches (<100cm2), however, expanded less than expected because of their combined tendency to grow more slowly in patch length and width than larger patches.
2. The expansion of plant cover will be much more rapid in many medium‐sized patches compared to few large patches of a similar combined area, because internal selflimitation by light and space is partially relieved in smaller patches. We anticipate that recruitment and mortality of new‐formed patches are critical steps preceding areal expansion. Quantification of these processes are needed fully to evaluate patch dynamics and space occupation.</description><identifier>ISSN: 0046-5070</identifier><identifier>EISSN: 1365-2427</identifier><identifier>DOI: 10.1111/j.1365-2427.1992.tb00539.x</identifier><identifier>CODEN: FWBLAB</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>Animal and plant ecology ; Animal, plant and microbial ecology ; Biological and medical sciences ; Callitriche cophocarpa ; Demecology ; Fundamental and applied biological sciences. Psychology ; Plants and fungi</subject><ispartof>Freshwater biology, 1992-04, Vol.27 (2), p.277-282</ispartof><rights>1993 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4147-f61e2f96135044b4e5d8a3a1e902a6bd10e0026110a939b11a8955665316e2a13</citedby><cites>FETCH-LOGICAL-c4147-f61e2f96135044b4e5d8a3a1e902a6bd10e0026110a939b11a8955665316e2a13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fj.1365-2427.1992.tb00539.x$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fj.1365-2427.1992.tb00539.x$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,27901,27902,45550,45551</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=4315098$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>KAJ SANG-JENSEN</creatorcontrib><creatorcontrib>VINDBAEK MADSEN, T</creatorcontrib><title>Patch dynamics of the stream macrophyte, Callitriche cophocarpa</title><title>Freshwater biology</title><description>SUMMARY
1. We examined changes in position and growth of Callitriche cophocarpa patches in a shallow section of a small Danish stream during the main expansion of plant cover between April and June. Mean upstream growth of patches was only 7.5% of downstream growth. The mean growth rate was 1,02cm day−1 in length and 0.55 cm day−1 in width and the growth rates were not significantly dependent on patch size. For patches with an area (A) above 100cm2, the growth rates in patch area (dA/dt) was proportional to patch circumference and thus √Aand the relative growth rate (dA/dt A−1) was inversely proportional to √A.The smallest patches (<100cm2), however, expanded less than expected because of their combined tendency to grow more slowly in patch length and width than larger patches.
2. The expansion of plant cover will be much more rapid in many medium‐sized patches compared to few large patches of a similar combined area, because internal selflimitation by light and space is partially relieved in smaller patches. We anticipate that recruitment and mortality of new‐formed patches are critical steps preceding areal expansion. Quantification of these processes are needed fully to evaluate patch dynamics and space occupation.</description><subject>Animal and plant ecology</subject><subject>Animal, plant and microbial ecology</subject><subject>Biological and medical sciences</subject><subject>Callitriche cophocarpa</subject><subject>Demecology</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Plants and fungi</subject><issn>0046-5070</issn><issn>1365-2427</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1992</creationdate><recordtype>article</recordtype><recordid>eNqVkE1PGzEQhq2qSE2B_7Cqqp662xl_xhxaQdoAEgIOfBytieNVNuxmg72oyb9nV4lyxxdLntfPO3oY-4ZQYH9-LQsUWuVcclOgtbzoZgBK2GLziY0Oo89sBCB1rsDAF_Y1pSUAjJXhI_bnnjq_yObbFTWVT1lbZt0iZKmLgZqsIR_b9WLbhZ_ZhOq66mLl-7HvH1tPcU0n7KikOoXT_X3MHqf_HiZX-c3d5fXk_Cb3EqXJS42Bl1ajUCDlTAY1H5MgDBY46dkcIQBwjQhkhZ0h0tgqpbUSqAMnFMfsx467ju3rW0ida6rkQ13TKrRvyaHmglsz7oNnu2C_eUoxlG4dq4bi1iG4wZlbukGMG8S4wZnbO3Ob_vP3fQslT3UZaeWrdCBIgQrs0PF7F_tf1WH7gQI3fb7gxvSAfAeoUhc2BwDFF6eNMMo93166v2IqzfSJu1vxDosujfk</recordid><startdate>199204</startdate><enddate>199204</enddate><creator>KAJ SANG-JENSEN</creator><creator>VINDBAEK MADSEN, T</creator><general>Blackwell Publishing Ltd</general><general>Blackwell Science</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SN</scope><scope>C1K</scope></search><sort><creationdate>199204</creationdate><title>Patch dynamics of the stream macrophyte, Callitriche cophocarpa</title><author>KAJ SANG-JENSEN ; VINDBAEK MADSEN, T</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4147-f61e2f96135044b4e5d8a3a1e902a6bd10e0026110a939b11a8955665316e2a13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1992</creationdate><topic>Animal and plant ecology</topic><topic>Animal, plant and microbial ecology</topic><topic>Biological and medical sciences</topic><topic>Callitriche cophocarpa</topic><topic>Demecology</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Plants and fungi</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>KAJ SANG-JENSEN</creatorcontrib><creatorcontrib>VINDBAEK MADSEN, T</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ecology Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><jtitle>Freshwater biology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>KAJ SANG-JENSEN</au><au>VINDBAEK MADSEN, T</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Patch dynamics of the stream macrophyte, Callitriche cophocarpa</atitle><jtitle>Freshwater biology</jtitle><date>1992-04</date><risdate>1992</risdate><volume>27</volume><issue>2</issue><spage>277</spage><epage>282</epage><pages>277-282</pages><issn>0046-5070</issn><eissn>1365-2427</eissn><coden>FWBLAB</coden><abstract>SUMMARY
1. We examined changes in position and growth of Callitriche cophocarpa patches in a shallow section of a small Danish stream during the main expansion of plant cover between April and June. Mean upstream growth of patches was only 7.5% of downstream growth. The mean growth rate was 1,02cm day−1 in length and 0.55 cm day−1 in width and the growth rates were not significantly dependent on patch size. For patches with an area (A) above 100cm2, the growth rates in patch area (dA/dt) was proportional to patch circumference and thus √Aand the relative growth rate (dA/dt A−1) was inversely proportional to √A.The smallest patches (<100cm2), however, expanded less than expected because of their combined tendency to grow more slowly in patch length and width than larger patches.
2. The expansion of plant cover will be much more rapid in many medium‐sized patches compared to few large patches of a similar combined area, because internal selflimitation by light and space is partially relieved in smaller patches. We anticipate that recruitment and mortality of new‐formed patches are critical steps preceding areal expansion. Quantification of these processes are needed fully to evaluate patch dynamics and space occupation.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1111/j.1365-2427.1992.tb00539.x</doi><tpages>6</tpages></addata></record> |
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| ispartof | Freshwater biology, 1992-04, Vol.27 (2), p.277-282 |
| issn | 0046-5070 1365-2427 |
| language | eng |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Animal and plant ecology Animal, plant and microbial ecology Biological and medical sciences Callitriche cophocarpa Demecology Fundamental and applied biological sciences. Psychology Plants and fungi |
| title | Patch dynamics of the stream macrophyte, Callitriche cophocarpa |
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