Trophic Trait Evolution Explains Variation in Nutrient Excretion Stoichiometry among Panamanian Armored Catfishes (Loricariidae).

Moody, Eric K. , Alda, Fernando , Capps, Krista A., Puebla, Oscar and Turner, Benjamin L. (2019) Trophic Trait Evolution Explains Variation in Nutrient Excretion Stoichiometry among Panamanian Armored Catfishes (Loricariidae). Open Access Diversity, 11 (6). Art.Nr. 88. DOI 10.3390/d11060088.

[img]
Preview
Text
diversity-11-00088.pdf - Published Version
Available under License Creative Commons: Attribution 4.0.

Download (817Kb) | Preview

Supplementary data:

Abstract

Variation in nutrient excretion rates and stoichiometric ratios (e.g., nitrogen to phosphorus) by consumers can have substantial effects on aquatic ecosystem function. While phylogenetic signals within an assemblage often explain variation in nutrient recycling rates and stoichiometry, the phylogenetically conserved traits that underlie this phenomenon remain unclear. In particular, variation in nutrient excretion stoichiometry across a phylogeny might be driven by phylogenetic patterns in either diet or body stoichiometry. We examined the relative importance of these traits in explaining variation in nutrient recycling rates and stoichiometry in a diverse family of Neotropical-armored catfishes, Loricariidae, in Panamanian streams. We found significant variation in nutrient mineralization traits among species and subfamilies, but variation in nutrient excretion stoichiometry among species was best explained by trophic position rather than body stoichiometry. The variation in trophic position among Panamanian species was consistent with variation in the trophic niche of their genera across South America, suggesting that phylogenetic patterns underpin the evolution of trophic and nutrient excretion traits among these species. Such geographical variation in nutrient mineralization patterns among closely related species may be common, given that trophic variation in fish lineages occurs widely. These results suggest that information on trophic trait evolution within lineages will advance our understanding of the functional contribution of animals to biogeochemical cycling.

Document Type: Article
Keywords: nutrient recycling; Neotropical stream; nitrogen; phosphorus; suckermouth catfish
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Marine Evolutionary Ecology
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.3390/d11060088
ISSN: 1424-2818
Date Deposited: 01 Jul 2019 10:24
Last Modified: 01 Jul 2019 10:24
URI: http://oceanrep.geomar.de/id/eprint/47055

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...