Sex expression and growth rates in natural populations of the desert soil crustal moss Syntrichia caninervis

Lloyd R. Stark; Brent D. Mishler; D. Nicholas McLetchie

doi:10.1006/jare.1998.0442

Sex expression and growth rates in natural populations of the desert soil crustal moss Syntrichia caninervis

Lloyd R. Stark
, Brent D. Mishler
, D. Nicholas McLetchie

Biology

Producción científica: Article › revisión exhaustiva

46 Citas (Scopus)

Resumen

The low elevation Mojave Desert cryptobiotic crust is dominated by the moss Syntrichia caninervis. In 16 populations of this moss, stem height and population were significantly associated with sex expression, with longer stems expressing sex more frequently and producing more perichaetia. The above-ground age of stems ranged up to 10 years, with a mean growth rate across populations of 0.36 mm year^-1. The overall stem sex ratio, as a proportion of the total number of stems, was 0.30 ♀ : 0 ♂: 0.70 non-expressing. The probability of expressing sex in a given season was 0.09. The absence of sexual reproduction (no sporophytes) and likely absence of the male sex from the area indicate that the non-expressing plants are female individuals. The slow growth rates, low rates of sex expression, absence of male plants, and absence of sexual reproduction in this crustal species may help explain why re-establishment of mosses on desert soils can take decades.

Idioma original	English
Páginas (desde-hasta)	401-416
Número de páginas	16
Publicación	Journal of Arid Environments
Volumen	40
N.º	4
DOI	https://doi.org/10.1006/jare.1998.0442
Estado	Published - dic 1998

Nota bibliográfica

Funding Information:
We thank the National Geographic Society (grant no. 5429-95)for providing partial travel costs, the Lake Mead National Recreation Area for providing permission to collect bryophytes, Bruce Allen, Ronald Pursell, and the Missouri Botanical Garden for providing valuable references and intangible assistance, Robin Stark for assistance in the field and preparation of figures, and Gene Sealove (National Park Service, Boulder City)for providing rainfall data.

Financiación

We thank the National Geographic Society (grant no. 5429-95)for providing partial travel costs, the Lake Mead National Recreation Area for providing permission to collect bryophytes, Bruce Allen, Ronald Pursell, and the Missouri Botanical Garden for providing valuable references and intangible assistance, Robin Stark for assistance in the field and preparation of figures, and Gene Sealove (National Park Service, Boulder City)for providing rainfall data.

Financiadores	Número del financiador
Boulder City
National Geographic Society	5429-95
National Park Service
Missouri Botanical Garden

ASJC Scopus subject areas

Ecology, Evolution, Behavior and Systematics
Ecology
Earth-Surface Processes

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10.1006/jare.1998.0442

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title = "Sex expression and growth rates in natural populations of the desert soil crustal moss Syntrichia caninervis",

abstract = "The low elevation Mojave Desert cryptobiotic crust is dominated by the moss Syntrichia caninervis. In 16 populations of this moss, stem height and population were significantly associated with sex expression, with longer stems expressing sex more frequently and producing more perichaetia. The above-ground age of stems ranged up to 10 years, with a mean growth rate across populations of 0.36 mm year-1. The overall stem sex ratio, as a proportion of the total number of stems, was 0.30 ♀ : 0 ♂: 0.70 non-expressing. The probability of expressing sex in a given season was 0.09. The absence of sexual reproduction (no sporophytes) and likely absence of the male sex from the area indicate that the non-expressing plants are female individuals. The slow growth rates, low rates of sex expression, absence of male plants, and absence of sexual reproduction in this crustal species may help explain why re-establishment of mosses on desert soils can take decades.",

keywords = "Bryophyte, Cryptobiotic soil crusts, Desert, Dioecy, Growth rates, Sex expression, Sex ratio, Syntrichia caninervis",

author = "Stark, \{Lloyd R.\} and Mishler, \{Brent D.\} and McLetchie, \{D. Nicholas\}",

note = "Funding Information: We thank the National Geographic Society (grant no. 5429-95)for providing partial travel costs, the Lake Mead National Recreation Area for providing permission to collect bryophytes, Bruce Allen, Ronald Pursell, and the Missouri Botanical Garden for providing valuable references and intangible assistance, Robin Stark for assistance in the field and preparation of figures, and Gene Sealove (National Park Service, Boulder City)for providing rainfall data.",

year = "1998",

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doi = "10.1006/jare.1998.0442",

language = "English",

volume = "40",

pages = "401--416",

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AU - Stark, Lloyd R.

AU - Mishler, Brent D.

AU - McLetchie, D. Nicholas

N1 - Funding Information: We thank the National Geographic Society (grant no. 5429-95)for providing partial travel costs, the Lake Mead National Recreation Area for providing permission to collect bryophytes, Bruce Allen, Ronald Pursell, and the Missouri Botanical Garden for providing valuable references and intangible assistance, Robin Stark for assistance in the field and preparation of figures, and Gene Sealove (National Park Service, Boulder City)for providing rainfall data.

PY - 1998/12

Y1 - 1998/12

N2 - The low elevation Mojave Desert cryptobiotic crust is dominated by the moss Syntrichia caninervis. In 16 populations of this moss, stem height and population were significantly associated with sex expression, with longer stems expressing sex more frequently and producing more perichaetia. The above-ground age of stems ranged up to 10 years, with a mean growth rate across populations of 0.36 mm year-1. The overall stem sex ratio, as a proportion of the total number of stems, was 0.30 ♀ : 0 ♂: 0.70 non-expressing. The probability of expressing sex in a given season was 0.09. The absence of sexual reproduction (no sporophytes) and likely absence of the male sex from the area indicate that the non-expressing plants are female individuals. The slow growth rates, low rates of sex expression, absence of male plants, and absence of sexual reproduction in this crustal species may help explain why re-establishment of mosses on desert soils can take decades.

AB - The low elevation Mojave Desert cryptobiotic crust is dominated by the moss Syntrichia caninervis. In 16 populations of this moss, stem height and population were significantly associated with sex expression, with longer stems expressing sex more frequently and producing more perichaetia. The above-ground age of stems ranged up to 10 years, with a mean growth rate across populations of 0.36 mm year-1. The overall stem sex ratio, as a proportion of the total number of stems, was 0.30 ♀ : 0 ♂: 0.70 non-expressing. The probability of expressing sex in a given season was 0.09. The absence of sexual reproduction (no sporophytes) and likely absence of the male sex from the area indicate that the non-expressing plants are female individuals. The slow growth rates, low rates of sex expression, absence of male plants, and absence of sexual reproduction in this crustal species may help explain why re-establishment of mosses on desert soils can take decades.

KW - Bryophyte

KW - Cryptobiotic soil crusts

KW - Desert

KW - Dioecy

KW - Growth rates

KW - Sex expression

KW - Sex ratio

KW - Syntrichia caninervis

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DO - 10.1006/jare.1998.0442

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Sex expression and growth rates in natural populations of the desert soil crustal moss Syntrichia caninervis

Resumen

Nota bibliográfica

Financiación

ASJC Scopus subject areas

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