High niche overlap in the stable isotope space of ground bettles
PBN-AR
Instytucja
Wydział Ogrodnictwa i Architektury Krajobrazu (Uniwersytet Przyrodniczy w Poznaniu)
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
ANNALES ZOOLOGICI FENNICI
ISSN
0003-455X
EISSN
1797-2450
Wydawca
DOI
Rok publikacji
2014
Numer zeszytu
3
Strony od-do
301-312
Numer tomu
51
Identyfikator DOI
Liczba arkuszy
Autorzy
(liczba autorów: 8)
Pozostali autorzy
+ 7
Streszczenia
Język
angielski
Treść
Classic theories on assembly rules and food-web structure are species-centered, so they largely ignore intraspecific variation. Intraspecific trophic variation, however, might be of key importance in understanding community organization. Here we study the variability of isotopic niche spaces of ground beetles and its consequences for the trophic structure of beetle assembly. Stable isotopes ratios (β13C and β15N) were measured in 1156 specimens of carabids belonging to 59 species inhabiting 20 island and two mainland sites of the Masuria Lakeland in northern Poland. Carabid species belonged to three different trophic guilds (named 'phytophages', 'decomposer feeders' and 'generalist predators'). However, this division is not sharp due to high intraspecific variability of isotopic signatures, which indicates the use of very different types of resources by conspecific individuals inhabiting different sites. As a consequence, most species studied did not differ significantly in the isotopic niche space. This high niche overlap corroborates the view that resource competition is not a major factor shaping the composition of ground beetles communities. Future studies should take into account the complex trophic structure of beetle assemblages and explore the intraspecific niche variability of ground beetles.
Inne
System-identifier
0000010599