Open Access
Diversity, volume 14, issue 8, pages 629
Trophic Diversification Out of Ancestral Specialization: An Example from a Radiating African Cyprinid Fish (Genus Garra)
Publication type: Journal Article
Publication date: 2022-08-06
Journal:
Diversity
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor: 2.4
ISSN: 14242818, 27749649, 27750035
Ecology
Nature and Landscape Conservation
Agricultural and Biological Sciences (miscellaneous)
Ecological Modeling
Abstract
Trophic resource partitioning is one of the main ecological mechanisms of adaptive radiation. The Garra is a highly specialized periphyton feeder that has widened jaws equipped with a horny cutting scraper. In a river located in the Ethiopian Highlands in East Africa, a diversification of Garra composed of six sympatric ecomorphs which were strikingly diverse in trophic morphology was revealed. A hypothesis on trophic resource partitioning was tested using data on diet composition, gut length, and stable isotopes. The obtained results confirmed the trophic diversification of Garra ecomorphs. Three feeding modes were revealed: (i) periphytonophagy, (ii) mixed periphytonophagy and zoophagy, and (iii) zoophagy. The periphyton feeders had a long gut and were enriched in δ13C values compared to the shorter gut and lowered δ13C values in the zoophagous ecomorphs. Therefore, Garra could respecialize out of its ancestral specialization. This finding does not support the generalists-to-specialists hypothesis on the origin of specializations, and suggests that Liem’s paradox is a more common phenomenon. In the case of specialists, we assume that new ecological opportunities can be ‘visible’ to specialists if they are preceded by relaxed selection constrains that lead to the widening of the ecological/morphological plasticity to jump out of a canalized mode of ancestral specialization.
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Citations by publishers
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3 publications, 50%
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1 publication, 16.67%
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- We do not take into account publications that without a DOI.
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Komarova E. S. et al. Trophic Diversification Out of Ancestral Specialization: An Example from a Radiating African Cyprinid Fish (Genus Garra) // Diversity. 2022. Vol. 14. No. 8. p. 629.
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Komarova E. S., Golubtsov A. S., LEVIN B. A. Trophic Diversification Out of Ancestral Specialization: An Example from a Radiating African Cyprinid Fish (Genus Garra) // Diversity. 2022. Vol. 14. No. 8. p. 629.
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TY - JOUR
DO - 10.3390/d14080629
UR - https://doi.org/10.3390%2Fd14080629
TI - Trophic Diversification Out of Ancestral Specialization: An Example from a Radiating African Cyprinid Fish (Genus Garra)
T2 - Diversity
AU - Komarova, Ekaterina S
AU - Golubtsov, Alexander S
AU - LEVIN, BORIS A.
PY - 2022
DA - 2022/08/06 00:00:00
PB - Multidisciplinary Digital Publishing Institute (MDPI)
SP - 629
IS - 8
VL - 14
SN - 1424-2818
SN - 2774-9649
SN - 2775-0035
ER -
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@article{2022_Komarova,
author = {Ekaterina S Komarova and Alexander S Golubtsov and BORIS A. LEVIN},
title = {Trophic Diversification Out of Ancestral Specialization: An Example from a Radiating African Cyprinid Fish (Genus Garra)},
journal = {Diversity},
year = {2022},
volume = {14},
publisher = {Multidisciplinary Digital Publishing Institute (MDPI)},
month = {aug},
url = {https://doi.org/10.3390%2Fd14080629},
number = {8},
pages = {629},
doi = {10.3390/d14080629}
}
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MLA
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Komarova, Ekaterina S., et al. “Trophic Diversification Out of Ancestral Specialization: An Example from a Radiating African Cyprinid Fish (Genus Garra).” Diversity, vol. 14, no. 8, Aug. 2022, p. 629. https://doi.org/10.3390%2Fd14080629.