Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1186/s40693-016-0061-y |
Reproductive output of mosses under experimental warming on Fildes Peninsula, King George Island, maritime Antarctica | |
Casanova-Katny, A.1,2; Torres-Mellado, G. A.2; Eppley, S. M.3,4 | |
通讯作者 | Casanova-Katny, A. |
来源期刊 | REVISTA CHILENA DE HISTORIA NATURAL
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ISSN | 0716-078X |
EISSN | 0717-6317 |
出版年 | 2016 |
卷号 | 89 |
英文摘要 | Background: Mosses dominate much of the vegetation in the Antarctic, but the effect of climatic change on moss growth and sexual reproduction has scarcely been studied. In Antarctica, mosses infrequently produce sporophytes; whether this is due to physiological limitation or an adaptive response is unknown. We studied the effect of experimental warming (with Open Top Chambers, OTCs) on sporophyte production on Fildes Peninsula, King George Island for four moss species (Bartramia patens, Hennediella antarctica, Polytrichastrum alpinum, and Sanionia georgicouncinata). To determine whether reducing cold stress increases sexual reproduction as would be predicted if sex is being constrained due to physiological limitations, we counted sporophytes for these four moss species in OTC and control plots during two years. Also, we measured sporophyte size for a smaller sample of sporophytes of two species, B. patens and H. antarctica, in the OTC and control plots. Results: After 2 years of the experimental treatment, maximum daily air temperature, but not daily mean air temperature, was significantly higher inside OTCs than outside. We found a significant species by treatment effect for sporophyte production, with more sporophytes produced in OTCs compared with controls for B. patens and P. alpinum. Also, sporophytes of B. patens and H. antarctica were significantly larger in the OTCs compared with the control plots. Conclusions: Our results suggest that the lack of sexual reproduction in these Antarctic mosses is not adaptive but is constrained by current environmental conditions and that ameliorating conditions, such as increased temperature may affect sexual reproduction in many Antarctic mosses, altering moss population genetics and dispersal patterns. |
英文关键词 | Antarctica Bryophyte Climate change Fildes Peninsula King George Island Sporophyte |
类型 | Article |
语种 | 英语 |
国家 | Chile ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000382982900001 |
WOS关键词 | INTERNATIONAL GEOPHYSICAL YEAR ; CLIMATE-CHANGE ; SEXUAL REPRODUCTION ; ENVIRONMENTAL-CHANGE ; SPOROPHYTE ABORTION ; VASCULAR-PLANT ; DESERT MOSS ; DICRANUM-POLYSETUM ; TUNDRA ; ECOSYSTEM |
WOS类目 | Biodiversity Conservation ; Ecology |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/196087 |
作者单位 | 1.Univ Catolica Temuco, Nucleo Estudios Ambientales, Rudecindo Ortega 02950, Temuco, Chile; 2.Univ Concepcion, Fac Ciencias Nat, Dept Bot, Lab Micol & Micorrizas, Barrio Univ S-N, Concepcion, Chile; 3.Portland State Univ, Dept Biol, Portland, OR 97207 USA; 4.Portland State Univ, Ctr Life Extreme Environm, Portland, OR 97207 USA |
推荐引用方式 GB/T 7714 | Casanova-Katny, A.,Torres-Mellado, G. A.,Eppley, S. M.. Reproductive output of mosses under experimental warming on Fildes Peninsula, King George Island, maritime Antarctica[J],2016,89. |
APA | Casanova-Katny, A.,Torres-Mellado, G. A.,&Eppley, S. M..(2016).Reproductive output of mosses under experimental warming on Fildes Peninsula, King George Island, maritime Antarctica.REVISTA CHILENA DE HISTORIA NATURAL,89. |
MLA | Casanova-Katny, A.,et al."Reproductive output of mosses under experimental warming on Fildes Peninsula, King George Island, maritime Antarctica".REVISTA CHILENA DE HISTORIA NATURAL 89(2016). |
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