Importance of resin ducts in reducing ponderosa pine mortality from bark beetle attack

Jeffrey M. Kane, Thomas E Kolb

Research output: Contribution to journalArticle

85 Citations (Scopus)

Abstract

The relative importance of growth and defense to tree mortality during drought and bark beetle attacks is poorly understood. We addressed this issue by comparing growth and defense characteristics between 25 pairs of ponderosa pine (Pinus ponderosa) trees that survived and trees that died from drought-associated bark beetle attacks in forests of northern Arizona, USA. The three major findings of our research were: (1) xylem resin ducts in live trees were >10% larger (diameter), >25% denser (no. of resin ducts mm-2), and composed >50% more area per unit ring growth than dead trees; (2) measures of defense, such as resin duct production (no. of resin ducts year-1) and the proportion of xylem ring area to resin ducts, not growth, were the best model parameters of ponderosa pine mortality; and (3) most correlations between annual variation in growth and resin duct characteristics were positive suggesting that conditions conducive to growth also increase resin duct production. Our results suggest that trees that survive drought and subsequent bark beetle attacks invest more carbon in resin defense than trees that die, and that carbon allocation to resin ducts is a more important determinant of tree mortality than allocation to radial growth.

Original languageEnglish (US)
Pages (from-to)601-609
Number of pages9
JournalOecologia
Volume164
Issue number3
DOIs
StatePublished - 2010

Fingerprint

resin canals
Pinus ponderosa
bark beetles
bark
resin
beetle
mortality
tree mortality
drought
xylem
carbon
dead wood
growth rings
biomass allocation
resins
annual variation

Keywords

  • Ips spp.
  • Northern Arizona, USA
  • Pinus ponderosa
  • Plant defense
  • Tree mortality
  • Tree ring

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

Cite this

Importance of resin ducts in reducing ponderosa pine mortality from bark beetle attack. / Kane, Jeffrey M.; Kolb, Thomas E.

In: Oecologia, Vol. 164, No. 3, 2010, p. 601-609.

Research output: Contribution to journalArticle

@article{f732853430cd477990d9961d50a7e11c,
title = "Importance of resin ducts in reducing ponderosa pine mortality from bark beetle attack",
abstract = "The relative importance of growth and defense to tree mortality during drought and bark beetle attacks is poorly understood. We addressed this issue by comparing growth and defense characteristics between 25 pairs of ponderosa pine (Pinus ponderosa) trees that survived and trees that died from drought-associated bark beetle attacks in forests of northern Arizona, USA. The three major findings of our research were: (1) xylem resin ducts in live trees were >10{\%} larger (diameter), >25{\%} denser (no. of resin ducts mm-2), and composed >50{\%} more area per unit ring growth than dead trees; (2) measures of defense, such as resin duct production (no. of resin ducts year-1) and the proportion of xylem ring area to resin ducts, not growth, were the best model parameters of ponderosa pine mortality; and (3) most correlations between annual variation in growth and resin duct characteristics were positive suggesting that conditions conducive to growth also increase resin duct production. Our results suggest that trees that survive drought and subsequent bark beetle attacks invest more carbon in resin defense than trees that die, and that carbon allocation to resin ducts is a more important determinant of tree mortality than allocation to radial growth.",
keywords = "Ips spp., Northern Arizona, USA, Pinus ponderosa, Plant defense, Tree mortality, Tree ring",
author = "Kane, {Jeffrey M.} and Kolb, {Thomas E}",
year = "2010",
doi = "10.1007/s00442-010-1683-4",
language = "English (US)",
volume = "164",
pages = "601--609",
journal = "Oecologia",
issn = "0029-8519",
publisher = "Springer Verlag",
number = "3",

}

TY - JOUR

T1 - Importance of resin ducts in reducing ponderosa pine mortality from bark beetle attack

AU - Kane, Jeffrey M.

AU - Kolb, Thomas E

PY - 2010

Y1 - 2010

N2 - The relative importance of growth and defense to tree mortality during drought and bark beetle attacks is poorly understood. We addressed this issue by comparing growth and defense characteristics between 25 pairs of ponderosa pine (Pinus ponderosa) trees that survived and trees that died from drought-associated bark beetle attacks in forests of northern Arizona, USA. The three major findings of our research were: (1) xylem resin ducts in live trees were >10% larger (diameter), >25% denser (no. of resin ducts mm-2), and composed >50% more area per unit ring growth than dead trees; (2) measures of defense, such as resin duct production (no. of resin ducts year-1) and the proportion of xylem ring area to resin ducts, not growth, were the best model parameters of ponderosa pine mortality; and (3) most correlations between annual variation in growth and resin duct characteristics were positive suggesting that conditions conducive to growth also increase resin duct production. Our results suggest that trees that survive drought and subsequent bark beetle attacks invest more carbon in resin defense than trees that die, and that carbon allocation to resin ducts is a more important determinant of tree mortality than allocation to radial growth.

AB - The relative importance of growth and defense to tree mortality during drought and bark beetle attacks is poorly understood. We addressed this issue by comparing growth and defense characteristics between 25 pairs of ponderosa pine (Pinus ponderosa) trees that survived and trees that died from drought-associated bark beetle attacks in forests of northern Arizona, USA. The three major findings of our research were: (1) xylem resin ducts in live trees were >10% larger (diameter), >25% denser (no. of resin ducts mm-2), and composed >50% more area per unit ring growth than dead trees; (2) measures of defense, such as resin duct production (no. of resin ducts year-1) and the proportion of xylem ring area to resin ducts, not growth, were the best model parameters of ponderosa pine mortality; and (3) most correlations between annual variation in growth and resin duct characteristics were positive suggesting that conditions conducive to growth also increase resin duct production. Our results suggest that trees that survive drought and subsequent bark beetle attacks invest more carbon in resin defense than trees that die, and that carbon allocation to resin ducts is a more important determinant of tree mortality than allocation to radial growth.

KW - Ips spp.

KW - Northern Arizona, USA

KW - Pinus ponderosa

KW - Plant defense

KW - Tree mortality

KW - Tree ring

UR - http://www.scopus.com/inward/record.url?scp=77958020601&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77958020601&partnerID=8YFLogxK

U2 - 10.1007/s00442-010-1683-4

DO - 10.1007/s00442-010-1683-4

M3 - Article

VL - 164

SP - 601

EP - 609

JO - Oecologia

JF - Oecologia

SN - 0029-8519

IS - 3

ER -