Land snail richness and abundance along a sharp ecological
gradient at two sampling scales: disentangling relationships

J 2014

Land snail richness and abundance along a sharp ecological gradient at two sampling scales: disentangling relationships

HORSÁK, Michal, David ZELENÝ a Michal HÁJEK

Základní údaje

Originální název

Land snail richness and abundance along a sharp ecological gradient at two sampling scales: disentangling relationships

Autoři

HORSÁK, Michal (203 Česká republika, garant, domácí), David ZELENÝ (203 Česká republika, domácí) a Michal HÁJEK (203 Česká republika, domácí)

Vydání

Journal of Molluscan Studies, 2014, 0260-1230

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10600 1.6 Biological sciences

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 1.362

Kód RIV

RIV/00216224:14310/14:00073893

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1093/mollus/eyu027

UT WoS

000340048300005

Klíčová slova anglicky

Terrestrial Gastropoda; diversity changes; mineral-richness gradient; richness-abundance relationship

Štítky

AKR, rivok

Změněno: 16. 2. 2018 14:58, prof. Mgr. Michal Hájek, Ph.D.

Anotace

V originále

It is generally recognized that the number of land snail species increases with the number of individuals in samples. This correlation may be an artefact of sample size, but it may also reflect the similarity in microhabitat preference of many species. Biotic interactions (competition) might also influence this relationship: an upper limit to co-existence at a particular scale. Here, we model the relationships between number of species, abundance of live individuals and environmental factors in the snail faunas of treeless fens covering a broad range of calcium content. The models considered two scales of sampling: (i) a 12 litre sample collected at a 4×4 m plot (187 samples) capturing at least 80% of the site's known species pool, and (ii) a sampling of 25×25 cm plots (115 samples) usually capturing less than 40% of the site's species pool. At the larger scale, the number of species responded to the calcium gradient more tightly than did total densities; but this was reversed at the smaller scale. Variation in abundance explained about the half of the species richness variation at both scales, but the number of individuals collected was not limiting for the number of species recorded at the larger scale. Using simulated communities we discovered that an asymptotic relationship between number of species and individuals can arise from a nested pattern of species distributions towards calcareous sites and thus that it may not be simply a rarefaction effect. The shape of a species accumulation curve may be only a weak indication of sampling efficiency when there is environmental variation among sample areas. Further, the observed hump-shaped relationship between the numbers of live individuals and species at the small scale raises a classical question about interspecific competition in land snail assemblages.

Návaznosti

GAP505/11/0779, projekt VaV

Název: Vliv faktorů prostředí a schopnosti šíření na skladbu taxocenóz vodních bezobratlých v izolovaných prameništních slatiništích (Akronym: Bezobratlí v prameništních slatiništích)

Investor: Grantová agentura ČR, Vliv faktorů prostředí a schopnosti šíření na skladbu taxocenóz vodních bezobratlých v izolovaných prameništních slatiništích

Citovat

HORSÁK, Michal, David ZELENÝ a Michal HÁJEK. Land snail richness and abundance along a sharp ecological gradient at two sampling scales: disentangling relationships. Journal of Molluscan Studies. 2014, roč. 80, AUGUST, s. 256-264. ISSN 0260-1230. Dostupné z: https://dx.doi.org/10.1093/mollus/eyu027.

@article{1199075,
   author = {Horsák, Michal and Zelený, David and Hájek, Michal},
   article_number = {AUGUST},
   doi = {http://dx.doi.org/10.1093/mollus/eyu027},
   keywords = {Terrestrial Gastropoda; diversity changes; mineral-richness gradient; richness-abundance relationship},
   language = {eng},
   issn = {0260-1230},
   journal = {Journal of Molluscan Studies},
   title = {Land snail richness and abundance along a sharp ecological gradient at two sampling scales: disentangling relationships},
   volume = {80},
   year = {2014}
}

TY  - JOUR
ID  - 1199075
AU  - Horsák, Michal - Zelený, David - Hájek, Michal
PY  - 2014
TI  - Land snail richness and abundance along a sharp ecological gradient at two sampling scales: disentangling relationships
JF  - Journal of Molluscan Studies
VL  - 80
IS  - AUGUST
SP  - 256-264
EP  - 256-264
SN  - 02601230
KW  - Terrestrial Gastropoda
KW  - diversity changes
KW  - mineral-richness gradient
KW  - richness-abundance relationship
N2  - It is generally recognized that the number of land snail species increases with the number of individuals in samples. This correlation may be an artefact of sample size, but it may also reflect the similarity in microhabitat preference of many species. Biotic interactions (competition) might also influence this relationship: an upper limit to co-existence at a particular scale. Here, we model the relationships between number of species, abundance of live individuals and environmental factors in the snail faunas of treeless fens covering a broad range of calcium content. The models considered two scales of sampling: (i) a 12 litre sample collected at a 4×4 m plot (187 samples) capturing at least 80% of the site's known species pool, and (ii) a sampling of 25×25 cm plots (115 samples) usually capturing less than 40% of the site's species pool. At the larger scale, the number of species responded to the calcium gradient more tightly than did total densities; but this was reversed at the smaller scale. Variation in abundance explained about the half of the species richness variation at both scales, but the number of individuals collected was not limiting for the number of species recorded at the larger scale. Using simulated communities we discovered that an asymptotic relationship between number of species and individuals can arise from a nested pattern of species distributions towards calcareous sites and thus that it may not be simply a rarefaction effect. The shape of a species accumulation curve may be only a weak indication of sampling efficiency when there is environmental variation among sample areas. Further, the observed hump-shaped relationship between the numbers of live individuals and species at the small scale raises a classical question about interspecific competition in land snail assemblages.
ER  -

HORSÁK, Michal, David ZELENÝ a Michal HÁJEK. Land snail richness and abundance along a sharp ecological gradient at two sampling scales: disentangling relationships. \textit{Journal of Molluscan Studies}. 2014, roč.~80, AUGUST, s.~256-264. ISSN~0260-1230. Dostupné z: https://dx.doi.org/10.1093/mollus/eyu027.

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