Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s00442-014-3161-x |
Post-burning regeneration of the Chaco seasonally dry forest: germination response of dominant species to experimental heat shock | |
Jaureguiberry, Pedro1,2; Diaz, Sandra1,2 | |
通讯作者 | Jaureguiberry, Pedro |
来源期刊 | OECOLOGIA |
ISSN | 0029-8549 |
EISSN | 1432-1939 |
出版年 | 2015 |
卷号 | 177期号:3页码:689-699 |
英文摘要 | Plant species of the Chaco seasonally dry forest of central Argentina have presumably been under a low evolutionary pressure to develop specialized fire-response traits, such as heat-stimulated germination. Nevertheless, other historical factors such as seasonal drought and/or endozoochorus dispersal could have led some species to develop heat-tolerant seeds. Therefore, heat-tolerant germination should be more common than heat-stimulated or heat-sensitive germination. To test this, we exposed seeds of 26 dominant species from the Chaco region to a broad range of experimental heat treatments and incubated them for 30 days at 25 A degrees C and 12 h photoperiod. We then scored the percent germination and classified them as heat-stimulated, heat-tolerant or heat-sensitive based on their germination following heat treatments relative to control. Seventeen species showed heat-tolerant germination, including all native graminoids. Seven species showed heat-stimulated germination, under the less-intense heat treatments. Only two species showed heat-sensitive germination. Endozoochory had no influence on germination responses. We suggest that, unlike Mediterranean-climate ecosystems, fire was not a major evolutionary force in the development of Chaco forests, and our results provide greater understanding of the potential response of Chaco plant communities in the face of increasingly frequent fires. |
英文关键词 | Exaptation Fire adaptations Fire history Plant regeneration strategies Seed dormancy and germination |
类型 | Article |
语种 | 英语 |
国家 | Argentina |
收录类别 | SCI-E |
WOS记录号 | WOS:000350033500007 |
WOS关键词 | PLANT FUNCTIONAL TRAITS ; ONONIS-SICULA GUSS ; PARENTAL PHOTOTHERMAL ENVIRONMENT ; AMARANTHUS-RETROFLEXUS L ; SEED-GERMINATION ; CENTRAL ARGENTINA ; MEDITERRANEAN BASIN ; SOIL TEMPERATURES ; CHARRED WOOD ; ARID CHACO |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/189399 |
作者单位 | 1.Univ Nacl Cordoba, CONICET, Inst Multidisciplinario Biol Vegetal, Casilla Correo 495, RA-5000 Cordoba, Argentina; 2.Univ Nacl Cordoba, FCEFyN, RA-5000 Cordoba, Argentina |
推荐引用方式 GB/T 7714 | Jaureguiberry, Pedro,Diaz, Sandra. Post-burning regeneration of the Chaco seasonally dry forest: germination response of dominant species to experimental heat shock[J],2015,177(3):689-699. |
APA | Jaureguiberry, Pedro,&Diaz, Sandra.(2015).Post-burning regeneration of the Chaco seasonally dry forest: germination response of dominant species to experimental heat shock.OECOLOGIA,177(3),689-699. |
MLA | Jaureguiberry, Pedro,et al."Post-burning regeneration of the Chaco seasonally dry forest: germination response of dominant species to experimental heat shock".OECOLOGIA 177.3(2015):689-699. |
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