Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s10144-015-0530-1 |
Variation of morphological and chemical traits in sexes of the dioecious perennial grass Poa ligularis in relation to shrub cover and aridity in Patagonian ecosystems | |
Moreno, Laura1; Bertiller, Monica B.1,2 | |
通讯作者 | Moreno, Laura |
来源期刊 | POPULATION ECOLOGY
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ISSN | 1438-3896 |
EISSN | 1438-390X |
出版年 | 2016 |
卷号 | 58期号:1页码:189-197 |
英文摘要 | Sexes of dioecious species may have dimorphic responses to environmental variation due to differences in resource requirements and reproductive costs. We analyzed the effect of aridity/relative shrub cover, and vicinity to shrub patches on morpho-chemical traits of sexes of the dioecious perennial grass Poa ligularis in patchy arid ecosystems in northern-central Patagonia. We hypothesized that sexes of P. ligularis have dimorphic responses in morpho-chemical traits in relation to the environmental variation induced by aridity/relative shrub cover and vicinity to shrub patches. We selected seven sites across a gradient of increasing aridity and relative shrub cover. We randomly collected 5-10 P. ligularis plants per site registering the sex (female or male) and location with respect to shrub patches (shrub patch or inter-patch). For each plant, we assessed morpho-chemical traits (height of the vegetative tillers, length/dry weight/area of blades, specific blade area, nitrogen and soluble phenol concentration in blades). Sexes showed dimorphic responses in height of vegetative tillers, blade length, and blade area with respect to vicinity to shrub patches; and in variation of soluble phenolics in blades in relation to aridity/relative shrub cover. Responses in both sexes were opposite to those expected by aridity, highlighting the role of favorable environments induced by shrub canopies on dimorphic responses of sexes of P. ligularis. Resource-rich microsites associated with shrub canopies promoted increased plant performance of females with high reproductive costs while resource-poor open areas, favorable for pollen dispersal, induced improved chemical defenses of males. These results are consistent with the resource availability hypothesis. |
英文关键词 | Arid Patagonia Inter-patch areas Plant defenses Sexual dimorphism Shrub patches Vegetative growth |
类型 | Article |
语种 | 英语 |
国家 | Argentina |
收录类别 | SCI-E |
WOS记录号 | WOS:000367807500017 |
WOS关键词 | CARBON-ISOTOPE DISCRIMINATION ; TREE ILEX-AQUIFOLIUM ; NORTHERN PATAGONIA ; PHENOTYPIC PLASTICITY ; FUNCTIONAL TRAITS ; SHORTGRASS STEPPE ; SEXUAL-DIMORPHISM ; SPATIAL-PATTERNS ; PATCH STRUCTURE ; ARGENTINA |
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/2XILL650/195713 |
作者单位 | 1.Consejo Nacl Invest Cient & Tecn, Ctr Nacl Patagon CENPAT, Puerto Madryn, Chubut, Argentina; 2.Univ Nacl Patagonia UNPSJB, Puerto Madryn, Chubut, Argentina |
推荐引用方式 GB/T 7714 | Moreno, Laura,Bertiller, Monica B.. Variation of morphological and chemical traits in sexes of the dioecious perennial grass Poa ligularis in relation to shrub cover and aridity in Patagonian ecosystems[J],2016,58(1):189-197. |
APA | Moreno, Laura,&Bertiller, Monica B..(2016).Variation of morphological and chemical traits in sexes of the dioecious perennial grass Poa ligularis in relation to shrub cover and aridity in Patagonian ecosystems.POPULATION ECOLOGY,58(1),189-197. |
MLA | Moreno, Laura,et al."Variation of morphological and chemical traits in sexes of the dioecious perennial grass Poa ligularis in relation to shrub cover and aridity in Patagonian ecosystems".POPULATION ECOLOGY 58.1(2016):189-197. |
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