Creeping ‘Fruitless Falls’: Reproductive Failure in Heterostylous Plants in Fragmented Landscapes

Washitani, Izumi

doi:10.1007/978-4-431-65930-3_9

Cited by 2 publications

(5 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, reduced pollinator services because of faunal degradation occur ubiquitously in present‐day landscapes throughout the world ( Buchmann & Nabhan 1996). The absence of pollinators and the solitude of isolated plants may impose several types of drawbacks on a plant population depending on the species’ reproductive biology and population history ( Washitani 1999).…”

Section: Discussionmentioning

confidence: 99%

“…Seed production is thought to be more sensitive to habitat fragmentation and isolation in heterostylous or dioecious plants than in plants with other breeding systems because the potential mating partners are more limited ( Levin 1975; Wyatt & Hellwig 1979; DeMauro 1993; Ågren 1996). However, solitude is suggested to be a more common reason for pollination failure and thus infertility of wild plants irrespective of whether the plant is a pollinator specialist or generalist ( Washitani 1999).…”

Section: Discussionmentioning

confidence: 99%

“…Within this highly fragmented landscape, it is an important factor creating among‐population variation in the years when pollinator activity is generally limited. Plant species depending on specific pollinators, that is, pollinator specialists, would be exposed to a higher risk of pollination limitation because of pollinator loss when compared with a pollinator generalist ( Allen‐Wardell et al 1998 ; Washitani 1999).…”

Section: Discussionmentioning

confidence: 99%

“…In addition, pollinator loss is not the sole reason for the seed‐set failure of plant populations in fragmented landscapes. A reduced opportunity for mating because of isolation, that is, a typical form of the Allee effect ( Allee 1951), may be another major cause of fruitless falls for small populations or isolated genets of declining populations ( Washitani 1999). The relative importance and/or concerted influences of pollinator limitation on plant reproductive success versus within‐plant resource or genetic limitations must be analyzed to clarify the precise status of the circumstances of reproduction in an isolated plant population.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of population size and pollinator limitation on seed‐set ofPrimula sieboldiipopulations in a fragmented landscape

Matsumura

Washitani

2000

Ecological Research

Self Cite

View full text Add to dashboard Cite

Female reproductive success, fruit and seed‐set and factors affecting them were measured for 3 years (1995–1997) for 24 populations of Primula sieboldii E. Morren, a threatened Japanese plant species in a highly fragmented landscape in southern Hokkaido. The smaller populations (genets <=; 3) set almost no seeds consistently during the study years. In larger populations (genets >= 7), proportions of failed flowers without damage from fungi or herbivores were relatively high, but fruit set per flower varied among the populations in 1995. Correlations of fruit (r = 0.589, P = 0.011) and seed‐ set (r = 0.688, P < 0.01) with population pollinator availability were highly significant. In 1995, pollination failure would be the most plausible reason for the variation in reproductive success among the populations. However, pollinator availability was relatively high in all populations in 1996 and 1997. In these years, higher proportions of fruit failed because of antagonistic biological interactions. In the populations with poor pollinator availability in 1995, mean fruit and seed‐sets were greater in the long‐styled morph than in the short‐styled morph. Such between‐morph differences are thought to be caused by partial self‐compatibility of the long‐styled morph and the results of hand pollination experiments support this hypothesis.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of population size and pollinator limitation on seed‐set ofPrimula sieboldiipopulations in a fragmented landscape

Matsumura

Washitani

2000

Ecological Research

Self Cite

View full text Add to dashboard Cite

show abstract

“…In an ideal population, an equal morph ratio is expected for the availability of compatible pollen and reproductive success [ 23 ]. However, skewed morph ratios have been observed in small and fragmented populations of many heterostylous species as a result of demographic stochasticity [ 24 , 25 ]. Morph types differ not only in herkogamy, but also in self- and intramorph compatibility levels, etc.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Genetic Responses to Short- and Long-Term Habitat Fragmentation in a Distylous Herb Hedyotis chyrsotricha (Rubiaceae)

Wei

Comes

et al. 2022

Plants

View full text Add to dashboard Cite

The genetic effects of habitat fragmentation are complex and are influenced by both species traits and landscape features. For plants with strong seed or pollen dispersal capabilities, the question of whether the genetic erosion of an isolated population becomes stronger or is counterbalanced by sufficient gene flow across landscapes as the timescales of fragmentation increase has been less studied. In this study, we compared the population structure and genetic diversity of a distylous herb, Hedyotis chyrsotricha (Rubiaceae), in two contrasting island systems of southeast China. Based on RAD-Seq data, our results showed that populations from the artificially created Thousand-Island Lake (TIL) harbored significantly higher levels of genetic diversity than those from the Holocene-dated Zhoushan Archipelago (ZA) (π = 0.247 vs. 0.208, HO = 0.307 vs. 0.256, HE = 0.228 vs. 0.190), while genetic differences between island and mainland populations were significant in neither the TIL region nor the ZA region. A certain level of population substructure was found in TIL populations, and the level of gene flow among TIL populations was also lower than in ZA populations (m = 0.019 vs. 0.027). Overall, our comparative study revealed that genetic erosion has not become much stronger for the island populations of either the TIL or ZA regions. Our results emphasized that the matrix of water in the island system may facilitate the seed (fruit) dispersal of H. chrysotricha, thus maintaining population connectivity and providing ongoing resilience to the effects of habitat fragmentation over thousands of years.

show abstract

Creeping ‘Fruitless Falls’: Reproductive Failure in Heterostylous Plants in Fragmented Landscapes

Cited by 2 publications

References 33 publications

Effects of population size and pollinator limitation on seed‐set ofPrimula sieboldiipopulations in a fragmented landscape

Effects of population size and pollinator limitation on seed‐set ofPrimula sieboldiipopulations in a fragmented landscape

A Comparative Study of Genetic Responses to Short- and Long-Term Habitat Fragmentation in a Distylous Herb Hedyotis chyrsotricha (Rubiaceae)

Contact Info

Product

Resources

About