Phylogenetic dispersion of host use in a tropical insect herbivore community

George D. Weiblen, Campbell O. Webb, Vojtech Novotny, Yves Basset, Scott E. Miller

Research output: Contribution to journalArticle

136 Citations (Scopus)

Abstract

Theory has long predicted that insect community structure should be related to host plant phylogeny. We examined the distribution of insect herbivore associations with respect to host plant phylogeny for caterpillars (Lepidoptera), beetles (Coleoptera), and grasshoppers and relatives (orthopteroids) in a New Guinea rain forest. We collected herbivores from three lineages of closely related woody plants and from more distantly related plant lineages in the same locality to examine the phylogenetic scale at which host specificity can be detected in a community sample. By grafting molecular phylogenies inferred from three different genes into a supertree, we developed a phylogenetic hypothesis for the host community. Feeding experiments were performed on more than 100 000 live insects collected from the 62 host species. We examined patterns of host use with respect to the host plant phylogeny. As predicted, we found a negative relationship between faunal similarity, defined as the proportion of all herbivores feeding on two hosts that are shared between the hosts, and the phylogenetic distance between hosts based on DNA sequence divergence. Host phylogenetic distance explained a significant fraction of the variance (25%) in herbivore community similarity, in spite of the many ecological factors that probably influence feeding patterns. Herbivore community similarity among congeneric hosts was high (50% on average) compared to overlap among host families (20-30% on average). We confirmed this pattern using the nearest taxon index (NTI) and net relatedness index (NRI) to quantify the extent of phylogenetic clustering in particular herbivore associations and to test whether patterns are significantly different from chance expectations. We found that 40% of caterpillar species showed significant phylogenetic clustering with respect to host plant associations, somewhat more so than for beetles or orthopteroids. We interpret this as evidence that a substantial fraction of tropical forest insect herbivores are clade specialists.

Original languageEnglish (US)
JournalEcology
Volume87
Issue number7 SUPPL.
StatePublished - Jul 1 2006

Fingerprint

host use
herbivore
herbivores
insect
phylogenetics
insects
phylogeny
host plant
host plants
caterpillar
beetle
Coleoptera
insect larvae
host specificity
grasshopper
woody plant
relatedness
forest insects
tropical forest
insect communities

Keywords

  • Community ecology
  • Community phylogenetics
  • Herbivory
  • Host specialization
  • Host specificity
  • Phylogenetic dispersion
  • Phylogeny
  • Plant-insect interactions
  • Tropical rain forest

Cite this

Weiblen, G. D., Webb, C. O., Novotny, V., Basset, Y., & Miller, S. E. (2006). Phylogenetic dispersion of host use in a tropical insect herbivore community. Ecology, 87(7 SUPPL.).

Phylogenetic dispersion of host use in a tropical insect herbivore community. / Weiblen, George D.; Webb, Campbell O.; Novotny, Vojtech; Basset, Yves; Miller, Scott E.

In: Ecology, Vol. 87, No. 7 SUPPL., 01.07.2006.

Research output: Contribution to journalArticle

Weiblen, GD, Webb, CO, Novotny, V, Basset, Y & Miller, SE 2006, 'Phylogenetic dispersion of host use in a tropical insect herbivore community', Ecology, vol. 87, no. 7 SUPPL..
Weiblen GD, Webb CO, Novotny V, Basset Y, Miller SE. Phylogenetic dispersion of host use in a tropical insect herbivore community. Ecology. 2006 Jul 1;87(7 SUPPL.).
Weiblen, George D. ; Webb, Campbell O. ; Novotny, Vojtech ; Basset, Yves ; Miller, Scott E. / Phylogenetic dispersion of host use in a tropical insect herbivore community. In: Ecology. 2006 ; Vol. 87, No. 7 SUPPL.
@article{41debd7a29514345a03b252c472f132a,
title = "Phylogenetic dispersion of host use in a tropical insect herbivore community",
abstract = "Theory has long predicted that insect community structure should be related to host plant phylogeny. We examined the distribution of insect herbivore associations with respect to host plant phylogeny for caterpillars (Lepidoptera), beetles (Coleoptera), and grasshoppers and relatives (orthopteroids) in a New Guinea rain forest. We collected herbivores from three lineages of closely related woody plants and from more distantly related plant lineages in the same locality to examine the phylogenetic scale at which host specificity can be detected in a community sample. By grafting molecular phylogenies inferred from three different genes into a supertree, we developed a phylogenetic hypothesis for the host community. Feeding experiments were performed on more than 100 000 live insects collected from the 62 host species. We examined patterns of host use with respect to the host plant phylogeny. As predicted, we found a negative relationship between faunal similarity, defined as the proportion of all herbivores feeding on two hosts that are shared between the hosts, and the phylogenetic distance between hosts based on DNA sequence divergence. Host phylogenetic distance explained a significant fraction of the variance (25{\%}) in herbivore community similarity, in spite of the many ecological factors that probably influence feeding patterns. Herbivore community similarity among congeneric hosts was high (50{\%} on average) compared to overlap among host families (20-30{\%} on average). We confirmed this pattern using the nearest taxon index (NTI) and net relatedness index (NRI) to quantify the extent of phylogenetic clustering in particular herbivore associations and to test whether patterns are significantly different from chance expectations. We found that 40{\%} of caterpillar species showed significant phylogenetic clustering with respect to host plant associations, somewhat more so than for beetles or orthopteroids. We interpret this as evidence that a substantial fraction of tropical forest insect herbivores are clade specialists.",
keywords = "Community ecology, Community phylogenetics, Herbivory, Host specialization, Host specificity, Phylogenetic dispersion, Phylogeny, Plant-insect interactions, Tropical rain forest",
author = "Weiblen, {George D.} and Webb, {Campbell O.} and Vojtech Novotny and Yves Basset and Miller, {Scott E.}",
year = "2006",
month = "7",
day = "1",
language = "English (US)",
volume = "87",
journal = "Ecology",
issn = "0012-9658",
publisher = "Ecological Society of America",
number = "7 SUPPL.",

}

TY - JOUR

T1 - Phylogenetic dispersion of host use in a tropical insect herbivore community

AU - Weiblen, George D.

AU - Webb, Campbell O.

AU - Novotny, Vojtech

AU - Basset, Yves

AU - Miller, Scott E.

PY - 2006/7/1

Y1 - 2006/7/1

N2 - Theory has long predicted that insect community structure should be related to host plant phylogeny. We examined the distribution of insect herbivore associations with respect to host plant phylogeny for caterpillars (Lepidoptera), beetles (Coleoptera), and grasshoppers and relatives (orthopteroids) in a New Guinea rain forest. We collected herbivores from three lineages of closely related woody plants and from more distantly related plant lineages in the same locality to examine the phylogenetic scale at which host specificity can be detected in a community sample. By grafting molecular phylogenies inferred from three different genes into a supertree, we developed a phylogenetic hypothesis for the host community. Feeding experiments were performed on more than 100 000 live insects collected from the 62 host species. We examined patterns of host use with respect to the host plant phylogeny. As predicted, we found a negative relationship between faunal similarity, defined as the proportion of all herbivores feeding on two hosts that are shared between the hosts, and the phylogenetic distance between hosts based on DNA sequence divergence. Host phylogenetic distance explained a significant fraction of the variance (25%) in herbivore community similarity, in spite of the many ecological factors that probably influence feeding patterns. Herbivore community similarity among congeneric hosts was high (50% on average) compared to overlap among host families (20-30% on average). We confirmed this pattern using the nearest taxon index (NTI) and net relatedness index (NRI) to quantify the extent of phylogenetic clustering in particular herbivore associations and to test whether patterns are significantly different from chance expectations. We found that 40% of caterpillar species showed significant phylogenetic clustering with respect to host plant associations, somewhat more so than for beetles or orthopteroids. We interpret this as evidence that a substantial fraction of tropical forest insect herbivores are clade specialists.

AB - Theory has long predicted that insect community structure should be related to host plant phylogeny. We examined the distribution of insect herbivore associations with respect to host plant phylogeny for caterpillars (Lepidoptera), beetles (Coleoptera), and grasshoppers and relatives (orthopteroids) in a New Guinea rain forest. We collected herbivores from three lineages of closely related woody plants and from more distantly related plant lineages in the same locality to examine the phylogenetic scale at which host specificity can be detected in a community sample. By grafting molecular phylogenies inferred from three different genes into a supertree, we developed a phylogenetic hypothesis for the host community. Feeding experiments were performed on more than 100 000 live insects collected from the 62 host species. We examined patterns of host use with respect to the host plant phylogeny. As predicted, we found a negative relationship between faunal similarity, defined as the proportion of all herbivores feeding on two hosts that are shared between the hosts, and the phylogenetic distance between hosts based on DNA sequence divergence. Host phylogenetic distance explained a significant fraction of the variance (25%) in herbivore community similarity, in spite of the many ecological factors that probably influence feeding patterns. Herbivore community similarity among congeneric hosts was high (50% on average) compared to overlap among host families (20-30% on average). We confirmed this pattern using the nearest taxon index (NTI) and net relatedness index (NRI) to quantify the extent of phylogenetic clustering in particular herbivore associations and to test whether patterns are significantly different from chance expectations. We found that 40% of caterpillar species showed significant phylogenetic clustering with respect to host plant associations, somewhat more so than for beetles or orthopteroids. We interpret this as evidence that a substantial fraction of tropical forest insect herbivores are clade specialists.

KW - Community ecology

KW - Community phylogenetics

KW - Herbivory

KW - Host specialization

KW - Host specificity

KW - Phylogenetic dispersion

KW - Phylogeny

KW - Plant-insect interactions

KW - Tropical rain forest

UR - http://www.scopus.com/inward/record.url?scp=33749822715&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33749822715&partnerID=8YFLogxK

M3 - Article

C2 - 16922303

AN - SCOPUS:33749822715

VL - 87

JO - Ecology

JF - Ecology

SN - 0012-9658

IS - 7 SUPPL.

ER -