Decoupling of Sexual Reproduction and Genetic Diversity in the Female-Biased Mojave Desert Moss<i>Syntrichia caninervis</i>(Pottiaceae)

Paasch, Amber; Mishler, Brent D.; Nosratinia, Sonia; Stark, Lloyd R.; Fisher, Kirsten M.

doi:10.1086/682708

Cited by 16 publications

(19 citation statements)

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“…Importantly, however, the phenotypic sex ratios in this sample were far more biased (patch level, 17 F:1 M in Wrightwood). While it is certainly possible that we have over‐estimated the long‐term female sex expression bias due to drought in the study area in the years prior to collection (2013–2014), collections from seasons with more typical winter weather patterns reported phenotypic sex ratios of 7 F:1 M (patch level, Paasch et al, 2015), approximately three times more female‐biased than the genotypic sex ratio we found. These data indicate that males constitute a disproportionately large fraction of the sterile plants, providing unequivocal support for the shy male hypothesis in these Mojave Desert populations of S. caninervis .…”

Section: Discussionmentioning

confidence: 57%

“…Syntrichia caninervis has long been a model for investigations regarding the evolution and ecology of sex ratio variation in mosses (Stark et al, 1998, 2001, 2005a, b; Stark and McLetchie, 2006; Paasch et al, 2015). However, our understanding of sex ratio variation in this species, as well as other bryophytes, has been limited by the large number of sterile plants in most bryophyte populations.…”

Section: Discussionmentioning

confidence: 99%

“…To date, within mosses, this testing for complete LD has only been accomplished in the model system Ceratodon purpureus (McDaniel et al, 2007, 2013). A less‐rigorous approach involves testing for an association between a molecular marker and sex in a large panel of unrelated individuals (as has been done in three Drepanocladus species; Bisang et al, 2010, 2015; Bisang and Hedenäs, 2013; Hedenäs et al, 2016). Here, we have also tested for an association between molecular markers and phenotypic sex and screened several thousand restriction‐site associated sequenced (RADseq) loci in a small number of individuals of known sex.…”

Section: Discussionmentioning

confidence: 99%

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Multiple factors influence population sex ratios in the Mojave Desert moss Syntrichia caninervis

Baughman

Payton

Paasch

et al. 2017

American J of Botany

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Section: Discussionmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Multiple factors influence population sex ratios in the Mojave Desert moss Syntrichia caninervis

Baughman

Payton

Paasch

et al. 2017

American J of Botany

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“…Asexual reproduction in bryophytes is far more prevalent than sexual reproduction (During and van Tooren, 1987;Hugonnot and Celle, 2012) and generally regarded as the primary avenue of species dispersal (Mishler, 1988). Genetic diversity of at least some BSC bryophyte species can remain high regardless of whether reproduction is sexual or asexual (Paasch et al, 2015). Asexual reproduction is more common in mosses (Pohjamo and Laaka-Lindberg, 2003) whereas sexual reproduction is more common in liverworts (Peñaloza-Bojacá et al, 2018).…”

Section: Bryophytesmentioning

confidence: 99%

Reproduction and Dispersal of Biological Soil Crust Organisms

et al. 2019

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Biological soil crusts (BSCs) consist of a diverse and highly integrated community of organisms that effectively colonize and collectively stabilize soil surfaces. BSCs vary in terms of soil chemistry and texture as well as the environmental parameters that combine to support unique combinations of organisms-including cyanobacteria dominated, lichen-dominated, and bryophyte-dominated crusts. The list of organismal groups that make up BSC communities in various and unique combinations include-free living, lichenized, and mycorrhizal fungi, chemoheterotrophic bacteria, cyanobacteria, diazotrophic bacteria and archaea, eukaryotic algae, and bryophytes. The various BSC organismal groups demonstrate several common characteristics including-desiccation and extreme temperature tolerance, production of various soil binding chemistries, a near exclusive dependency on asexual reproduction, a pattern of aerial dispersal over impressive distances, and a universal vulnerability to a wide range of human-related perturbations. With this publication, we provide literature-based insights as to how each organismal group contributes to the formation and maintenance of the structural and functional attributes of BSCs, how they reproduce, and how they are dispersed. We also emphasize the importance of effective application of molecular and microenvironment sampling and assessment tools in order to provide cogent and essential answers that will allow scientists and land managers to better understand and manage the biodiversity and functional relationships of soil crust communities.

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“…The largest plants are commonly the most fecund, and size is closely correlated with total flower production in populations (Weiner, ; Herrera, ). In fact, the effect of plant size on reproductive output has been broadly discussed in extreme environments (Aarssen, ), such as desert and saline environments (Waller, ; Aguilar, Ashworth, Galetto, & Aizen, ; del Carmen Mandujano, Carrillo‐Angeles, Martínez‐Peralta, & Golubov, ; Benassi et al, ; Chacoff et al, ; Paasch, Mishler, Nosratinia, Stark, & Fisher, ; Salguero‐Gómez et al, ). Moreover, although alpine plants benefit from asexual reproduction to compensate for the low diversity and activity of pollinators, many cushion species are entirely dependent on sexual reproduction (Chen et al, ).…”

Section: Introductionmentioning

confidence: 99%

Plant size influences abundance of floral visitors and biomass allocation for the cushion plant Thylacospermum caespitosum under an extreme alpine environment

Zhao

Zhang

2019

Ecology and Evolution

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Variation in size may influence the abundance of visitors and reproductive allocation for cushion plants in the extreme alpine environments. To assess effects of plant size on the abundance of main visitors and reproductive allocation in Thylacospermum caespitosum populations at two altitudes, the abundance of the visitors, visiting frequency, total number of flowers, number of fruits, number of unseeded flowers, and reproductive allocation were investigated during the period of reproductive growth. Concurrently, the effects of plant size on the visitors' contributions to fruit setting rate were assessed by a bagging experiment. Our results showed that flies ( Musca domestica and Dasyphora asiatica ) were the main pollinating insects of T. caespitosum , and they could obvious facilitate ( p < 0.05) the fruit setting rate of this cushion plant. Seed set and floral visitation were significantly influenced ( p < 0.001) by plant size. Moreover, the reproductive allocation and fruit setting rate of T. caespitosum was influenced ( p < 0.001) by plant size. More biomass was allocated to reproduction in plants of greater diameter. There is an increase in reproductive success (increases of fruit number with increase in plant size) in relation to plant size. In conclusion, the extent of M. domestica and D. asiatica to facilitate the fruit setting rate mainly depended on the size of T. caespitosum . Size‐dependent reproductive allocation occurred in T. caespitosum and was the chief factor affecting the contribution of flies to fruit setting rate. These traits reflect reproductive fitness of T. caespitosum related to plant size in extreme alpine environments.

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Decoupling of Sexual Reproduction and Genetic Diversity in the Female-Biased Mojave Desert MossSyntrichia caninervis(Pottiaceae)

Cited by 16 publications

References 79 publications

Multiple factors influence population sex ratios in the Mojave Desert moss Syntrichia caninervis

Multiple factors influence population sex ratios in the Mojave Desert moss Syntrichia caninervis

Reproduction and Dispersal of Biological Soil Crust Organisms

Plant size influences abundance of floral visitors and biomass allocation for the cushion plant Thylacospermum caespitosum under an extreme alpine environment

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