The structure of food webs along river networks

Tamara N. Romanuk, Leland J. Jackson, John R. Post, Ed McCauley, Neo D Martinez

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Do changes in the species composition of riverine fish assemblages along river networks lead to predictable changes in food-web structure? We assembled empirical "fish-centered" river food webs for three rivers located along a latitudinal gradient in the South Saskatchewan River Basin (SSRB) that differ in land-use impacts and geomorphology but flow through similar mountain, foothill, and prairie physiographic regions. We then calculated 17 food-web properties to determine whether the nine river food webs differed according to physiographic region or river sub-basin. There were no statistically significant differences in the 17 food-web properties calculated among the rivers. In contrast, fish species richness, connectance, the proportion of herbivores, and the proportion of cannibals changed longitudinally along the river network. Our results suggest that regional changes in river geomorphology and physicochemistry play an important role in determining longitudinal variation in food-web properties such as fish species richness and connectance. In contrast, the overall structure of river food webs may be relatively similar and insensitive to regional influences such as zoogeography. Further explorations of river and other food webs would greatly illuminate this suggestion.

Original languageEnglish (US)
Pages (from-to)3-10
Number of pages8
JournalEcography
Volume29
Issue number1
DOIs
StatePublished - Feb 2006
Externally publishedYes

Fingerprint

food webs
food web
rivers
river
geomorphology
fish
species diversity
species richness
zoogeography
latitudinal gradient
Saskatchewan
prairies
prairie
herbivore
herbivores
river basin
land use
mountains
basins
mountain

ASJC Scopus subject areas

  • Ecology

Cite this

Romanuk, T. N., Jackson, L. J., Post, J. R., McCauley, E., & Martinez, N. D. (2006). The structure of food webs along river networks. Ecography, 29(1), 3-10. https://doi.org/10.1111/j.2005.0906-7590.04181.x

The structure of food webs along river networks. / Romanuk, Tamara N.; Jackson, Leland J.; Post, John R.; McCauley, Ed; Martinez, Neo D.

In: Ecography, Vol. 29, No. 1, 02.2006, p. 3-10.

Research output: Contribution to journalArticle

Romanuk, TN, Jackson, LJ, Post, JR, McCauley, E & Martinez, ND 2006, 'The structure of food webs along river networks', Ecography, vol. 29, no. 1, pp. 3-10. https://doi.org/10.1111/j.2005.0906-7590.04181.x
Romanuk, Tamara N. ; Jackson, Leland J. ; Post, John R. ; McCauley, Ed ; Martinez, Neo D. / The structure of food webs along river networks. In: Ecography. 2006 ; Vol. 29, No. 1. pp. 3-10.
@article{5777beca60154163b68727d7c105ddf7,
title = "The structure of food webs along river networks",
abstract = "Do changes in the species composition of riverine fish assemblages along river networks lead to predictable changes in food-web structure? We assembled empirical {"}fish-centered{"} river food webs for three rivers located along a latitudinal gradient in the South Saskatchewan River Basin (SSRB) that differ in land-use impacts and geomorphology but flow through similar mountain, foothill, and prairie physiographic regions. We then calculated 17 food-web properties to determine whether the nine river food webs differed according to physiographic region or river sub-basin. There were no statistically significant differences in the 17 food-web properties calculated among the rivers. In contrast, fish species richness, connectance, the proportion of herbivores, and the proportion of cannibals changed longitudinally along the river network. Our results suggest that regional changes in river geomorphology and physicochemistry play an important role in determining longitudinal variation in food-web properties such as fish species richness and connectance. In contrast, the overall structure of river food webs may be relatively similar and insensitive to regional influences such as zoogeography. Further explorations of river and other food webs would greatly illuminate this suggestion.",
author = "Romanuk, {Tamara N.} and Jackson, {Leland J.} and Post, {John R.} and Ed McCauley and Martinez, {Neo D}",
year = "2006",
month = "2",
doi = "10.1111/j.2005.0906-7590.04181.x",
language = "English (US)",
volume = "29",
pages = "3--10",
journal = "Ecography",
issn = "0906-7590",
publisher = "Wiley-Blackwell",
number = "1",

}

TY - JOUR

T1 - The structure of food webs along river networks

AU - Romanuk, Tamara N.

AU - Jackson, Leland J.

AU - Post, John R.

AU - McCauley, Ed

AU - Martinez, Neo D

PY - 2006/2

Y1 - 2006/2

N2 - Do changes in the species composition of riverine fish assemblages along river networks lead to predictable changes in food-web structure? We assembled empirical "fish-centered" river food webs for three rivers located along a latitudinal gradient in the South Saskatchewan River Basin (SSRB) that differ in land-use impacts and geomorphology but flow through similar mountain, foothill, and prairie physiographic regions. We then calculated 17 food-web properties to determine whether the nine river food webs differed according to physiographic region or river sub-basin. There were no statistically significant differences in the 17 food-web properties calculated among the rivers. In contrast, fish species richness, connectance, the proportion of herbivores, and the proportion of cannibals changed longitudinally along the river network. Our results suggest that regional changes in river geomorphology and physicochemistry play an important role in determining longitudinal variation in food-web properties such as fish species richness and connectance. In contrast, the overall structure of river food webs may be relatively similar and insensitive to regional influences such as zoogeography. Further explorations of river and other food webs would greatly illuminate this suggestion.

AB - Do changes in the species composition of riverine fish assemblages along river networks lead to predictable changes in food-web structure? We assembled empirical "fish-centered" river food webs for three rivers located along a latitudinal gradient in the South Saskatchewan River Basin (SSRB) that differ in land-use impacts and geomorphology but flow through similar mountain, foothill, and prairie physiographic regions. We then calculated 17 food-web properties to determine whether the nine river food webs differed according to physiographic region or river sub-basin. There were no statistically significant differences in the 17 food-web properties calculated among the rivers. In contrast, fish species richness, connectance, the proportion of herbivores, and the proportion of cannibals changed longitudinally along the river network. Our results suggest that regional changes in river geomorphology and physicochemistry play an important role in determining longitudinal variation in food-web properties such as fish species richness and connectance. In contrast, the overall structure of river food webs may be relatively similar and insensitive to regional influences such as zoogeography. Further explorations of river and other food webs would greatly illuminate this suggestion.

UR - http://www.scopus.com/inward/record.url?scp=33645019526&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33645019526&partnerID=8YFLogxK

U2 - 10.1111/j.2005.0906-7590.04181.x

DO - 10.1111/j.2005.0906-7590.04181.x

M3 - Article

AN - SCOPUS:33645019526

VL - 29

SP - 3

EP - 10

JO - Ecography

JF - Ecography

SN - 0906-7590

IS - 1

ER -