Quantitative comparison of food niches in some freshwater zooplankton

Autor:	John J. Gilbert, Kenneth G. Bogdan
Rok vydání:	1987
Předmět:	education.field_of_study biology Nannochloris Population biology.organism_classification Zooplankton Keratella cochlearis Cryptomonas Guild Botany Ankistrodesmus education Ecology Evolution Behavior and Systematics Bosmina longirostris
Zdroj:	Oecologia. 72:331-340
ISSN:	1432-1939 0029-8549
Popis:	The abilities of some zooplankton (rotifers, cladocerans, copepods) to ingest different sizes and kinds of food cells were quantified by determining the relative efficiencies with which they ingested nine tracer-cell types, ranging from a coccoid bacterium (0.45 μm3) to the alga Cryptomonas erosa (800-920 μm3). These efficiencies were obtained by dividing the clearance rate of each zooplankton group (species population, developmental stage or size class of a species population) on each 32P-labeled cell type by that of a simultaneously-offered, 33P-labeled, standard cell type - Chlamydomonas reinhardtii. Similarities of efficiency patterns on these cell types (food niches) between all possible pairs of the 17 zooplankton groups from 4 ecosystems were determined by calculating correlation coefficients. Although the utilization of the tested cell types may vary greatly within a species, three feeding guilds could be distinguished - based primarily on the efficiencies with which the smallest cell types were ingested. Guild I (Poyarthra vulgaris, Keratella crassa, Diaptomus minutus nauplii) ate the smallest cells (
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0bd028806922eaf9dbb2e0122235cd5a https://doi.org/10.1007/bf00377560 Zobrazit plný text záznamu Full text from SpringerLink