Ecology of Bryophytes in Mojave Desert Biological Soil Crusts: Effects of Elevated CO2 on Sex Expression, Stress Tolerance, and Productivity in the Moss Syntrichia caninervis Mitt.

2012 ◽  
pp. 169-190
Author(s):  
John C. Brinda ◽  
Catherine Fernando ◽  
Zoltan Tuba ◽  
Nancy G. Slack ◽  
Lloyd R. Stark
Keyword(s):  
Stress Tolerance ◽  
Elevated Co2 ◽  
Mojave Desert ◽  
Sex Expression ◽  
Biological Soil Crusts ◽  
Syntrichia Caninervis ◽  
Soil Crusts

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

2016 ◽  
Author(s):  
Jenna T. Baughman ◽  
Adam C. Payton ◽  
Amber E. Paasch ◽  
Kirsten M. Fisher ◽  
Stuart F. McDaniel
Keyword(s):  
Sex Ratio ◽  
Mojave Desert ◽  
Natural Populations ◽  
Sex Expression ◽  
Differential Mortality ◽  
List Type ◽  
Male Mortality ◽  
Syntrichia Caninervis ◽  
Sex Ratio Bias ◽  
Female Bias

ABSTRACTPremise of research: Natural populations of many mosses appear highly female-biased based on the presence of reproductive structures. This bias could be caused by increased male mortality, lower male growth rate, or a higher threshold for achieving sexual maturity in males. Here we test these hypotheses using samples from two populations of the Mojave Desert moss Syntrichia caninervis.Methods: We used double digest restriction-site associated DNA (RAD) sequencing to identify candidate sex-associated loci in a panel of sex-expressing plants. Next, we used putative sex-associated markers to identify the sex of individuals without sex structures.Key results: We found an 18:1 phenotypic female: male sex ratio in the higher elevation site (Wrightwood), and no sex expression at the low elevation site (Phelan). In contrast, based on genetic data we found a 2:1 female bias in the Wrightwood site and only females in the Phelan site. The area occupied by male and female genets was indistinguishable.Conclusions: These data suggest that both differential mortality and sexual dimorphism in thresholds for sex expression likely contribute to population genetic and phenotypic sex ratio biases, and that phenotypic sex expression alone fails to capture the extent of actual sex ratio bias present in natural populations of S. caninervis.

Elevated CO2 did not mitigate the effect of a short-term drought on biological soil crusts

2012 ◽  
Vol 48 (7) ◽  
pp. 797-805 ◽  
Author(s):  
Timothy M. Wertin ◽  
Susan L. Phillips ◽  
Sasha C. Reed ◽  
Jayne Belnap
Keyword(s):  
Elevated Co2 ◽  
Biological Soil Crusts ◽  
Short Term ◽  
Soil Crusts

Biological Soil Crusts in the Mojave Desert, USA: Micromorphology and Pedogenesis

2012 ◽  
Vol 76 (5) ◽  
pp. 1685-1695 ◽  
Author(s):  
Amanda J. Williams ◽  
Brenda J. Buck ◽  
Mengesha A. Beyene
Keyword(s):  
Mojave Desert ◽  
Biological Soil Crusts ◽  
Soil Crusts

Discussion on wind factor influencing the distribution of biological soil crusts on surface of sand dunes

2013 ◽  
Vol 5 (6) ◽  
pp. 739
Author(s):  
Wu YongSheng ◽  
Erdun Hasi ◽  
Yin RuiPing ◽  
Zhang Xin ◽  
Ren Jie ◽  
...  
Keyword(s):  
Sand Dunes ◽  
Biological Soil Crusts ◽  
Soil Crusts
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