干旱区生态环境知识资源中心(Arid): Plant traits related to leaf decomposition processes in arid ecosystems of northern Patagonia

Arid

DOI	10.1093/jpe/rty012
	Plant traits related to leaf decomposition processes in arid ecosystems of northern Patagonia
	Bar Lamas, Marlene I.1,2; Carrera, Analia L.1,2; Bertiller, Monica B.1,2
通讯作者	Bar Lamas, Marlene I.
来源期刊	JOURNAL OF PLANT ECOLOGY
ISSN	1752-9921
EISSN	1752-993X
出版年	2019
卷号	12 期号:2 页码:216-227
英文摘要	Aims Plants play an important role in ecosystem processes. Functional meaning of trait variation in wide environmental gradients is well known but is scarcely known across narrow gradients. We analyze the variation of morphological, physical and chemical traits of dominant plant species and the potential rates of dry mass loss and N release/immobilization during senesced leaf decomposition of these species across a narrow aridity gradient, and to identify indicative traits useful to set species functional groups sharing decomposition patterns. Methods We analyzed the variation of morphological, physical and chemical traits (specific leaf area, seed mass, N and soluble phenols in green and senesced leaves, plant height) in dominant plant species at 12 sites across an aridity gradient in northern Patagonia, Argentina. We collected senesced leaves of each plant species at each site and used them to estimate the potential rates of dry mass loss and N release/immobilization from decomposing senesced leaves in a microcosm experiment. We analyzed the variation of plant traits and decomposition rates across the aridity gradient. We grouped plants species according to growth forms (perennial grasses, deciduous shrubs, evergreen shrubs) and different combinations of morpho-physical and chemical traits of green and senesced leaves and compared the potential rates of dry mass loss and N release/immobilization during leaf decomposition among these groups delimited by each grouping criteria. Important Findings Plant traits did not vary across the aridity gradient. The potential rate of dry mass loss was positively related to aridity, while the potential rate of N release/immobilization did not vary across the gradient. Grouping species by separately morpho-physical and chemical traits resulted in a large overlapping in mean values of decomposition rates among groups. In contrast, plant groupings based on growth forms and those including all morpho-physical and chemical traits of green or senesced leaves yielded groups with differentiated rates of decomposition processes. The two latter groupings clustered species from more than one growth form indicating some overlapping in the rates of decomposition processes among species of different growth forms. Among traits, N concentration in senesced leaves and plant height explained the highest variation in decomposition rates being positively related to potential rates of dry mass loss and N release/immobilization. We concluded that plant groupings based on morpho-physical and chemical traits of either green or senesced leaves may be more powerful to differentiate functional species groups sharing decomposition patterns than the growth form grouping. Moreover, plant height and N concentration in senesced leaves may be considered relevant synthetic functional traits in relation to decomposition processes in narrow aridity gradients.
英文关键词	mass loss morpho-physical and chemical plant traits N release immobilization rate plant growth forms
类型	Article
语种	英语
国家	Argentina
收录类别	SCI-E
WOS记录号	WOS:000461146600003
WOS关键词	LITTER DECOMPOSITION ; PHENOTYPIC PLASTICITY ; FUNCTIONAL TRAITS ; PERENNIAL GRASSES ; STRATEGY SCHEME ; GROWTH FORMS ; MONTE ; NITROGEN ; CLIMATE ; HEIGHT
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217278
作者单位	1.Consejo Nacl Invest Cient & Tecn, CCT, CENPAT, IPEEC, Blvd Brown 2915, RA-9120 Puerto Madryn, Chubut, Argentina; 2.Univ Nacl Patagonia San Juan Bosco, Fac Ciencias Nat, Blvd Brown 3700, RA-9120 Puerto Madryn, Chubut, Argentina
推荐引用方式 GB/T 7714	Bar Lamas, Marlene I.,Carrera, Analia L.,Bertiller, Monica B.. Plant traits related to leaf decomposition processes in arid ecosystems of northern Patagonia[J],2019,12(2):216-227.
APA	Bar Lamas, Marlene I.,Carrera, Analia L.,&Bertiller, Monica B..(2019).Plant traits related to leaf decomposition processes in arid ecosystems of northern Patagonia.JOURNAL OF PLANT ECOLOGY,12(2),216-227.
MLA	Bar Lamas, Marlene I.,et al."Plant traits related to leaf decomposition processes in arid ecosystems of northern Patagonia".JOURNAL OF PLANT ECOLOGY 12.2(2019):216-227.