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2014-02-21T18:44:06Z

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	~~'''Indicator value'''~~ is ~~a term that has been used in [[ecology]] for two different indices. The older usage of the term refers to [[Heinz Ellenberg\|Ellenberg]]~~'~~s indicator values, which are based on a simple ordinal classification of plants according to~~ the ~~position of their realized~~ [~~[ecological niche]] along an [[environmental gradient]].<ref name=Ellenberg1974>Ellenberg H. Zeigerwerte der Gefässpflanzen Mitteleuropas / H. Ellenberg~~ // ~~Scripta geobotanica~~. ~~Göttingen, 1974~~. ~~– Vol~~. ~~9. – 197 p.<~~/~~ref> More recently, the term has also been used to refer to Dufrêne & Legendre's indicator value, which is a quantitative~~ index ~~that measures the statistical alliance of a species to any one of the classes in a classification of sites~~.~~<ref name~~=~~Dufrene1997>Dufrene, M., and P. Legendre. 1997. Species assemblages and indicator species~~: ~~The need for a flexible asymmetrical approach~~. ~~Ecological Monographs 67:345-366~~.</~~ref>~~		Myrtle Benny is how I'm called and I really feel comfy when individuals use the complete title. What I adore performing [http://www.dhspoteh.co.kr/xe/index.php?document_srl=331302&mid=Sports her response] is doing ceramics but [http://Www.ign.com/boards/threads/list-of-celebrities-with-herpes.452635999/ I haven't] [http://tfor.vectorsigma.ru/node/5409 vectorsigma.ru] made home std at home std testing test kit a dime with it. Managing individuals has been his day occupation for a whilst. North Dakota is her beginning place but she will have to move one working day or an [http://Www.Uptodate.com/contents/molluscum-contagiosum-beyond-the-basics additional].<br><br>Also visit my web-site ... home std test kit home std test ([http://wmazowiecku.pl/stay-yeast-infection-free-using-these-helpful-suggestions/ My Web Site])

	~~==Ellenberg's Indicator Value==~~

	~~Ellenberg's indicator values<ref name="Ellenberg1974"~~/~~> were the first model~~ of ~~bioindication proposed and applied to the flora of Germany, and they have a long tradition in interpretation and understanding of plant communities and their evolution~~. ~~The latest edition of Ellenberg~~'~~s indicator values applies a 9 point scale for each of six gradients~~: soil acidity, soil productivity or fertility, soil humidity, soil salinity, climatic continentality and light availability.<ref>Ellenberg H., Weber H.E., Dull R., Wirth V., Werner W., Paulisen D. Zeigerwerte von Pflanzen in Mitteleuropa [Indicator values of plants in Central Europe] / H. ~~Ellenberg, H~~.~~E. Weber, R. Dull, V. Wirth, W. Werner, D. Paulisen~~ // ~~Scripta Geobotanics~~. ~~– V~~. 18. ~~– Verlag Erich Goltze KG, Göttingen, 1991. – 248 s.<~~/~~ref> Indicator values also exist in Landolt's Flora of Switzerland<ref>Landolt E~~. ~~Okologische Zeigerwerts zur Schweizer Flora / E~~. ~~Landolt~~ // ~~Veroff. Geobot. Inst. ETH. Zurich. – 1977. – H. 64. – S. 1~~-~~208.</ref> and some other floras. A substantial advance on a comparable scale to place a local flora on gradients are~~ the ~~climatic profiles of the French SOPHY online database.{{Citation needed\|date=December 2012}}~~

	~~==Indicator Value of Dufrêne and Legendre==~~

	~~This indicator value is an integral part of the indicator value analysis (IndVal), which quantifies the fidelity and specificity of species in relation to groups of sites in a user~~-~~specified classification of sites, and tests for the [[statistical significance]] of the associations by [[permutation]~~].<~~ref name="Dufrene1997"/~~><~~ref~~>~~De Caceres, M., and P. Legendre. 2009. Associations between species and groups of sites: indices and statistical inference. Ecology 90:3566~~-~~3574~~.~~</ref><ref>De Caceres, M~~.~~, P~~. ~~Legendre, and M. Moretti. 2010. Improving indicator species analysis by combining groups of sites. Oikos 119:1674-1684.</ref>~~

	~~The indicator value of species ''i'' for class ''j'' is obtained with the equation~~
	:~~<math>IndVal_{ij} = A_{ij} * B_{ij} * 100<~~/~~math>~~
	~~Here~~
	~~:''A<sub>ij<~~/~~sub>'' is fidelity, i~~.~~e. the proportion of the individuals of species ''i'' that are in class ''j''~~
	~~:''B<sub>ij<~~/~~sub>'' is specificity, i.e. the proportion of sites in class ''j'' that contain species ''i''~~

	~~==References==~~
	~~{{Reflist}}~~

	~~{{DEFAULTSORT:Indicator Value}}~~
	~~[[Category:Measurement of biodiversity]~~]

70.82.32.109: cleaned up run violation

2014-01-22T04:44:09Z

cleaned up run violation

← Older revision		Revision as of 06:44, 22 January 2014
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	~~She~~ is ~~recognized by~~ the ~~title~~ of ~~Myrtle Shryock~~. ~~Years ago we moved~~ to ~~North Dakota~~ and ~~I love~~ each ~~working day residing here~~. ~~She is a librarian but she~~'s ~~usually wanted her personal company~~. ~~Doing ceramics~~ is ~~what her family~~ and ~~her appreciate~~.<br><br>~~Take a look at my site~~ ... ~~[http~~://~~theoffshoremanual~~.~~com~~/~~?testimonial~~=~~know-facing-candida-albicans at home std test~~]		'''Indicator value''' is a term that has been used in [[ecology]] for two different indices. The older usage of the term refers to [[Heinz Ellenberg\|Ellenberg]]'s indicator values, which are based on a simple ordinal classification of plants according to the position of their realized [[ecological niche]] along an [[environmental gradient]].<ref name=Ellenberg1974>Ellenberg H. Zeigerwerte der Gefässpflanzen Mitteleuropas / H. Ellenberg // Scripta geobotanica. Göttingen, 1974. – Vol. 9. – 197 p.</ref> More recently, the term has also been used to refer to Dufrêne & Legendre's indicator value, which is a quantitative index that measures the statistical alliance of a species to any one of the classes in a classification of sites.<ref name=Dufrene1997>Dufrene, M., and P. Legendre. 1997. Species assemblages and indicator species: The need for a flexible asymmetrical approach. Ecological Monographs 67:345-366.</ref>

			==Ellenberg's Indicator Value==

			Ellenberg's indicator values<ref name="Ellenberg1974"/> were the first model of bioindication proposed and applied to the flora of Germany, and they have a long tradition in interpretation and understanding of plant communities and their evolution. The latest edition of Ellenberg's indicator values applies a 9 point scale for each of six gradients: soil acidity, soil productivity or fertility, soil humidity, soil salinity, climatic continentality and light availability.<ref>Ellenberg H., Weber H.E., Dull R., Wirth V., Werner W., Paulisen D. Zeigerwerte von Pflanzen in Mitteleuropa [Indicator values of plants in Central Europe] / H. Ellenberg, H.E. Weber, R. Dull, V. Wirth, W. Werner, D. Paulisen // Scripta Geobotanics. – V. 18. – Verlag Erich Goltze KG, Göttingen, 1991. – 248 s.</ref> Indicator values also exist in Landolt's Flora of Switzerland<ref>Landolt E. Okologische Zeigerwerts zur Schweizer Flora / E. Landolt // Veroff. Geobot. Inst. ETH. Zurich. – 1977. – H. 64. – S. 1-208.</ref> and some other floras. A substantial advance on a comparable scale to place a local flora on gradients are the climatic profiles of the French SOPHY online database.{{Citation needed\|date=December 2012}}

			==Indicator Value of Dufrêne and Legendre==

			This indicator value is an integral part of the indicator value analysis (IndVal), which quantifies the fidelity and specificity of species in relation to groups of sites in a user-specified classification of sites, and tests for the [[statistical significance]] of the associations by [[permutation]].<ref name="Dufrene1997"/><ref>De Caceres, M., and P. Legendre. 2009. Associations between species and groups of sites: indices and statistical inference. Ecology 90:3566-3574.</ref><ref>De Caceres, M., P. Legendre, and M. Moretti. 2010. Improving indicator species analysis by combining groups of sites. Oikos 119:1674-1684.</ref>

			The indicator value of species ''i'' for class ''j'' is obtained with the equation
			:<math>IndVal_{ij} = A_{ij} * B_{ij} * 100</math>
			Here
			:''A<sub>ij</sub>'' is fidelity, i.e. the proportion of the individuals of species ''i'' that are in class ''j''
			:''B<sub>ij</sub>'' is specificity, i.e. the proportion of sites in class ''j'' that contain species ''i''

			==References==
			{{Reflist}}

			{{DEFAULTSORT:Indicator Value}}
			[[Category:Measurement of biodiversity]]

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2012-08-09T16:17:28Z

Dating maintenance tags: {{Citation needed}}

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