Co-occurrence based assessment of species habitat specialization is affected by the size of species pool: reply to Fridley et al. (2007)

ZELENÝ, David. Co-occurrence based assessment of species habitat specialization is affected by the size of species pool: reply to Fridley et al. (2007). The journal of ecology. Oxford: Blackwell scientific publications, 2009, roč. 97, č. 1, s. 10-17. ISSN 0022-0477.

Základní údaje

Originální název

Co-occurrence based assessment of species habitat specialization is affected by the size of species pool: reply to Fridley et al. (2007)

Název česky

Metoda stanovení míry specializace druhu na základě jejich společného výskytu je ovlivněna velikostí species pool: odpověď na článek Fridley et al. (2007)

Autoři

ZELENÝ, David (203 Česká republika, garant)

Vydání

The journal of ecology, Oxford, Blackwell scientific publications, 2009, 0022-0477

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Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10600 1.6 Biological sciences

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 4.690

Kód RIV

RIV/00216224:14310/09:00034000

Organizační jednotka

Přírodovědecká fakulta

UT WoS

000261684400003

Klíčová slova anglicky

additive partitioning; beta diversity; Ellenberg indicator values; generalists; habitat diversity; local-regional species richness relationship; simulation; specialists; theta value; Whittaker's beta

Štítky

additive partitioning, beta diversity, Ellenberg indicator values, generalists, habitat diversity, local-regional species richness relationship, simulation, specialists, theta value, Whittaker's beta

Příznaky

Mezinárodní význam, Recenzováno

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Anotace

V originále

1. Fridley et al. (2007) introduced a technique of species habitat specialization assessment based on co-occurrence analysis of large species-plot matrixes, with a continuous metric (theta value) intended to reflect relative species niche width. 2. They used simulated data in order to demonstrate the functionality of the new method. I repeated their simulation and introduced three alternative scenarios with various patterns of species pool size along a simulated gradient. Results indicated that the co-occurrence based estimation of species niche width is dependent on the size of species pool at the position of species optima. This relationship was also revealed in an analysis of a real data set with Ellenberg indicator values as surrogates for environmental gradients. 3. I introduced a modification of the original algorithm, which corrects the effect of the species pool on the estimation of species niche width: the beta diversity measure based on additive partitioning was replaced with the multiplicative Whittaker's beta. Even after this, the method can satisfactorily recover the real pattern of species specialization only for unsaturated communities with a linear relationship between local and regional species richness. 4. Synthesis. This paper corrects the algorithm for co-occurrence based estimation of species specialization, introduced by Fridley et al. (2007), which was sensitive to the changes in species pool size along environmental gradients.

Česky

1. Fridley et al. (2007) introduced a technique of species habitat specialization assessment based on co-occurrence analysis of large species-plot matrixes, with a continuous metric (theta value) intended to reflect relative species niche width. 2. They used simulated data in order to demonstrate the functionality of the new method. I repeated their simulation and introduced three alternative scenarios with various patterns of species pool size along a simulated gradient. Results indicated that the co-occurrence based estimation of species niche width is dependent on the size of species pool at the position of species optima. This relationship was also revealed in an analysis of a real data set with Ellenberg indicator values as surrogates for environmental gradients. 3. I introduced a modification of the original algorithm, which corrects the effect of the species pool on the estimation of species niche width: the beta diversity measure based on additive partitioning was replaced with the multiplicative Whittaker's beta. Even after this, the method can satisfactorily recover the real pattern of species specialization only for unsaturated communities with a linear relationship between local and regional species richness. 4. Synthesis. This paper corrects the algorithm for co-occurrence based estimation of species specialization, introduced by Fridley et al. (2007), which was sensitive to the changes in species pool size along environmental gradients.

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Návaznosti

MSM0021622416, záměr

Název: Diverzita biotických společenstev a populací: kauzální analýza variability v prostoru a čase Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Diverzita biotických společenstev: kauzální analýza variability v prostoru a čase