The compounding effects of high pollen limitation, selfing rates and inbreeding depression leave a New Zealand tree with few viable offspring

Megan L. Van Etten, Jennifer A. Tate, Sandra H. Anderson, Dave Kelly, Jenny J. Ladley, Merilyn F. Merrett, Paul G. Peterson, Alastair W. Robertson

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Background and Aims Interactions between species are especially sensitive to environmental changes. The interaction between plants and pollinators is of particular interest given the potential current global decline in pollinators. Reduced pollinator services can be compensated for in some plant species by self-pollination. However, if inbreeding depression is high, selfed progeny could die prior to reaching adulthood, leading to cryptic recruitment failure. Methods To examine this scenario, pollinator abundance, pollen limitation, selfing rates and inbreeding depression were examined in 12 populations of varying disturbance levels in Sophora microphylla (Fabaceae), an endemic New Zealand tree species. Key Results High pollen limitation was found in all populations (average of 58 % reduction in seed production, nine populations), together with high selfing rates (61 % of offspring selfed, six populations) and high inbreeding depression (selfed offspring 86 % less fit, six populations). Pollen limitation was associated with lower visitation rates by the two endemic bird pollinators. Conclusions The results suggest that for these populations, over half of the seeds produced are genetically doomed. This reduction in the fitness of progeny due to reduced pollinator service is probably important to population dynamics of other New Zealand species. More broadly, the results suggest that measures of seed production or seedling densities may be a gross overestimate of the effective offspring production. This could lead to cryptic recruitment failure, i.e. a decline in successful reproduction despite high progeny production. Given the global extent of pollinator declines, cryptic recruitment failure may be widespread.

Original languageEnglish (US)
Pages (from-to)833-843
Number of pages11
JournalAnnals of botany
Volume116
Issue number5
DOIs
StatePublished - Oct 2015

Fingerprint

inbreeding depression
selfing
pollinators
pollen
seed productivity
Sophora
self-pollination
adulthood
Fabaceae
population dynamics
seedlings
birds
seeds

All Science Journal Classification (ASJC) codes

  • Plant Science

Cite this

Van Etten, Megan L. ; Tate, Jennifer A. ; Anderson, Sandra H. ; Kelly, Dave ; Ladley, Jenny J. ; Merrett, Merilyn F. ; Peterson, Paul G. ; Robertson, Alastair W. / The compounding effects of high pollen limitation, selfing rates and inbreeding depression leave a New Zealand tree with few viable offspring. In: Annals of botany. 2015 ; Vol. 116, No. 5. pp. 833-843.
@article{81da56dbc44a405293b8caf397b5785a,
title = "The compounding effects of high pollen limitation, selfing rates and inbreeding depression leave a New Zealand tree with few viable offspring",
abstract = "Background and Aims Interactions between species are especially sensitive to environmental changes. The interaction between plants and pollinators is of particular interest given the potential current global decline in pollinators. Reduced pollinator services can be compensated for in some plant species by self-pollination. However, if inbreeding depression is high, selfed progeny could die prior to reaching adulthood, leading to cryptic recruitment failure. Methods To examine this scenario, pollinator abundance, pollen limitation, selfing rates and inbreeding depression were examined in 12 populations of varying disturbance levels in Sophora microphylla (Fabaceae), an endemic New Zealand tree species. Key Results High pollen limitation was found in all populations (average of 58 {\%} reduction in seed production, nine populations), together with high selfing rates (61 {\%} of offspring selfed, six populations) and high inbreeding depression (selfed offspring 86 {\%} less fit, six populations). Pollen limitation was associated with lower visitation rates by the two endemic bird pollinators. Conclusions The results suggest that for these populations, over half of the seeds produced are genetically doomed. This reduction in the fitness of progeny due to reduced pollinator service is probably important to population dynamics of other New Zealand species. More broadly, the results suggest that measures of seed production or seedling densities may be a gross overestimate of the effective offspring production. This could lead to cryptic recruitment failure, i.e. a decline in successful reproduction despite high progeny production. Given the global extent of pollinator declines, cryptic recruitment failure may be widespread.",
author = "{Van Etten}, {Megan L.} and Tate, {Jennifer A.} and Anderson, {Sandra H.} and Dave Kelly and Ladley, {Jenny J.} and Merrett, {Merilyn F.} and Peterson, {Paul G.} and Robertson, {Alastair W.}",
year = "2015",
month = "10",
doi = "10.1093/aob/mcv118",
language = "English (US)",
volume = "116",
pages = "833--843",
journal = "Annals of Botany",
issn = "0305-7364",
publisher = "Oxford University Press",
number = "5",

}

The compounding effects of high pollen limitation, selfing rates and inbreeding depression leave a New Zealand tree with few viable offspring. / Van Etten, Megan L.; Tate, Jennifer A.; Anderson, Sandra H.; Kelly, Dave; Ladley, Jenny J.; Merrett, Merilyn F.; Peterson, Paul G.; Robertson, Alastair W.

In: Annals of botany, Vol. 116, No. 5, 10.2015, p. 833-843.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The compounding effects of high pollen limitation, selfing rates and inbreeding depression leave a New Zealand tree with few viable offspring

AU - Van Etten, Megan L.

AU - Tate, Jennifer A.

AU - Anderson, Sandra H.

AU - Kelly, Dave

AU - Ladley, Jenny J.

AU - Merrett, Merilyn F.

AU - Peterson, Paul G.

AU - Robertson, Alastair W.

PY - 2015/10

Y1 - 2015/10

N2 - Background and Aims Interactions between species are especially sensitive to environmental changes. The interaction between plants and pollinators is of particular interest given the potential current global decline in pollinators. Reduced pollinator services can be compensated for in some plant species by self-pollination. However, if inbreeding depression is high, selfed progeny could die prior to reaching adulthood, leading to cryptic recruitment failure. Methods To examine this scenario, pollinator abundance, pollen limitation, selfing rates and inbreeding depression were examined in 12 populations of varying disturbance levels in Sophora microphylla (Fabaceae), an endemic New Zealand tree species. Key Results High pollen limitation was found in all populations (average of 58 % reduction in seed production, nine populations), together with high selfing rates (61 % of offspring selfed, six populations) and high inbreeding depression (selfed offspring 86 % less fit, six populations). Pollen limitation was associated with lower visitation rates by the two endemic bird pollinators. Conclusions The results suggest that for these populations, over half of the seeds produced are genetically doomed. This reduction in the fitness of progeny due to reduced pollinator service is probably important to population dynamics of other New Zealand species. More broadly, the results suggest that measures of seed production or seedling densities may be a gross overestimate of the effective offspring production. This could lead to cryptic recruitment failure, i.e. a decline in successful reproduction despite high progeny production. Given the global extent of pollinator declines, cryptic recruitment failure may be widespread.

AB - Background and Aims Interactions between species are especially sensitive to environmental changes. The interaction between plants and pollinators is of particular interest given the potential current global decline in pollinators. Reduced pollinator services can be compensated for in some plant species by self-pollination. However, if inbreeding depression is high, selfed progeny could die prior to reaching adulthood, leading to cryptic recruitment failure. Methods To examine this scenario, pollinator abundance, pollen limitation, selfing rates and inbreeding depression were examined in 12 populations of varying disturbance levels in Sophora microphylla (Fabaceae), an endemic New Zealand tree species. Key Results High pollen limitation was found in all populations (average of 58 % reduction in seed production, nine populations), together with high selfing rates (61 % of offspring selfed, six populations) and high inbreeding depression (selfed offspring 86 % less fit, six populations). Pollen limitation was associated with lower visitation rates by the two endemic bird pollinators. Conclusions The results suggest that for these populations, over half of the seeds produced are genetically doomed. This reduction in the fitness of progeny due to reduced pollinator service is probably important to population dynamics of other New Zealand species. More broadly, the results suggest that measures of seed production or seedling densities may be a gross overestimate of the effective offspring production. This could lead to cryptic recruitment failure, i.e. a decline in successful reproduction despite high progeny production. Given the global extent of pollinator declines, cryptic recruitment failure may be widespread.

UR - http://www.scopus.com/inward/record.url?scp=84943557927&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84943557927&partnerID=8YFLogxK

U2 - 10.1093/aob/mcv118

DO - 10.1093/aob/mcv118

M3 - Article

C2 - 26229065

AN - SCOPUS:84943557927

VL - 116

SP - 833

EP - 843

JO - Annals of Botany

JF - Annals of Botany

SN - 0305-7364

IS - 5

ER -