Water loss from flower heads predicts seed release in two invasive thistles

Katherine M. Marchetto, Eelke Jongejans, Katriona Shea, Richard Auhl

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Background: Non-random seed release caused by plant responses to weather conditions is important for seed dispersal. Much is known about the effects of wind speed and turbulence, but our understanding of the effects of water loss on seed release is either qualitative, or indirect and phenomenological.Aims: To quantify the empirical relationship between water loss and seed release.Methods: Capitula of the invasive thistles Carduus acanthoides and C. nutans were collected from the field and treated for either 0, 1 or 2 days in the laboratory at three different vapour pressure deficit levels (3.4, 9.5 and 17.0 hPa) to cause a range of water loss values. Total seed release was quantified before and during wind tunnel trials.Results: Water loss was the only significant predictor of whether or not capitula released any seeds. The number of seeds released was predicted by water loss, capitulum diameter and herbivore damage, with the same amount of water loss having less effect on larger capitula.Conclusions: These results represent an important step towards using weather data to predict seed release for many xerochastic species. Incorporating the effects of water loss on seed release into mechanistic seed dispersal models will greatly improve predictions of when and how far seeds disperse.

Original languageEnglish (US)
Pages (from-to)57-65
Number of pages9
JournalPlant Ecology and Diversity
Volume5
Issue number1
DOIs
StatePublished - Mar 1 2012

Fingerprint

flower
seed
flowers
seeds
water
seed dispersal
Carduus acanthoides
Carduus nutans
loss
wind tunnels
vapor pressure
wind tunnel
meteorological data
wind speed
plant response
herbivore
herbivores
weather
wind velocity
turbulence

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science

Cite this

@article{a1bcde68046245eaa0c3844666bd2e1e,
title = "Water loss from flower heads predicts seed release in two invasive thistles",
abstract = "Background: Non-random seed release caused by plant responses to weather conditions is important for seed dispersal. Much is known about the effects of wind speed and turbulence, but our understanding of the effects of water loss on seed release is either qualitative, or indirect and phenomenological.Aims: To quantify the empirical relationship between water loss and seed release.Methods: Capitula of the invasive thistles Carduus acanthoides and C. nutans were collected from the field and treated for either 0, 1 or 2 days in the laboratory at three different vapour pressure deficit levels (3.4, 9.5 and 17.0 hPa) to cause a range of water loss values. Total seed release was quantified before and during wind tunnel trials.Results: Water loss was the only significant predictor of whether or not capitula released any seeds. The number of seeds released was predicted by water loss, capitulum diameter and herbivore damage, with the same amount of water loss having less effect on larger capitula.Conclusions: These results represent an important step towards using weather data to predict seed release for many xerochastic species. Incorporating the effects of water loss on seed release into mechanistic seed dispersal models will greatly improve predictions of when and how far seeds disperse.",
author = "Marchetto, {Katherine M.} and Eelke Jongejans and Katriona Shea and Richard Auhl",
year = "2012",
month = "3",
day = "1",
doi = "10.1080/17550874.2012.667841",
language = "English (US)",
volume = "5",
pages = "57--65",
journal = "Plant Ecology and Diversity",
issn = "1755-0874",
publisher = "Routledge",
number = "1",

}

Water loss from flower heads predicts seed release in two invasive thistles. / Marchetto, Katherine M.; Jongejans, Eelke; Shea, Katriona; Auhl, Richard.

In: Plant Ecology and Diversity, Vol. 5, No. 1, 01.03.2012, p. 57-65.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Water loss from flower heads predicts seed release in two invasive thistles

AU - Marchetto, Katherine M.

AU - Jongejans, Eelke

AU - Shea, Katriona

AU - Auhl, Richard

PY - 2012/3/1

Y1 - 2012/3/1

N2 - Background: Non-random seed release caused by plant responses to weather conditions is important for seed dispersal. Much is known about the effects of wind speed and turbulence, but our understanding of the effects of water loss on seed release is either qualitative, or indirect and phenomenological.Aims: To quantify the empirical relationship between water loss and seed release.Methods: Capitula of the invasive thistles Carduus acanthoides and C. nutans were collected from the field and treated for either 0, 1 or 2 days in the laboratory at three different vapour pressure deficit levels (3.4, 9.5 and 17.0 hPa) to cause a range of water loss values. Total seed release was quantified before and during wind tunnel trials.Results: Water loss was the only significant predictor of whether or not capitula released any seeds. The number of seeds released was predicted by water loss, capitulum diameter and herbivore damage, with the same amount of water loss having less effect on larger capitula.Conclusions: These results represent an important step towards using weather data to predict seed release for many xerochastic species. Incorporating the effects of water loss on seed release into mechanistic seed dispersal models will greatly improve predictions of when and how far seeds disperse.

AB - Background: Non-random seed release caused by plant responses to weather conditions is important for seed dispersal. Much is known about the effects of wind speed and turbulence, but our understanding of the effects of water loss on seed release is either qualitative, or indirect and phenomenological.Aims: To quantify the empirical relationship between water loss and seed release.Methods: Capitula of the invasive thistles Carduus acanthoides and C. nutans were collected from the field and treated for either 0, 1 or 2 days in the laboratory at three different vapour pressure deficit levels (3.4, 9.5 and 17.0 hPa) to cause a range of water loss values. Total seed release was quantified before and during wind tunnel trials.Results: Water loss was the only significant predictor of whether or not capitula released any seeds. The number of seeds released was predicted by water loss, capitulum diameter and herbivore damage, with the same amount of water loss having less effect on larger capitula.Conclusions: These results represent an important step towards using weather data to predict seed release for many xerochastic species. Incorporating the effects of water loss on seed release into mechanistic seed dispersal models will greatly improve predictions of when and how far seeds disperse.

UR - http://www.scopus.com/inward/record.url?scp=84868226750&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84868226750&partnerID=8YFLogxK

U2 - 10.1080/17550874.2012.667841

DO - 10.1080/17550874.2012.667841

M3 - Article

AN - SCOPUS:84868226750

VL - 5

SP - 57

EP - 65

JO - Plant Ecology and Diversity

JF - Plant Ecology and Diversity

SN - 1755-0874

IS - 1

ER -