干旱区生态环境知识资源中心(Arid): Seed and seedling traits have strong impacts on establishment of a perennial bunchgrass in invaded semi-arid systems

Arid

DOI	10.1111/1365-2664.13367
	Seed and seedling traits have strong impacts on establishment of a perennial bunchgrass in invaded semi-arid systems
	Leger, Elizabeth A.1; Atwater, Daniel Z.2; James, Jeremy J.3
通讯作者	Leger, Elizabeth A.
来源期刊	JOURNAL OF APPLIED ECOLOGY
ISSN	0021-8901
EISSN	1365-2664
出版年	2019
卷号	56 期号:6 页码:1343-1354
英文摘要	Many restoration projects use seeds to found new populations, and understanding phenotypic traits associated with seedling establishment in disturbed and invaded communities is important for restoration efforts world-wide. Focusing on the perennial grass Elymus elymoides, a native species common to sagebrush steppe communities in the Western United States, we asked if seed and seedling traits could predict field establishment. We collected seeds from 34 populations from the western Great Basin. In greenhouse studies, we measured variation in seed and seedling characteristics of wild populations and one cultivar. We also quantified abiotic conditions at the collection location and asked if these characteristics predicted survival and other fitness metrics at five planting sites. Planting sites were all near-monocultures of the invasive annual grass Bromus tectorum, and all sites experienced similar, below-average precipitation during the experiment. Phenotypic traits were strongly correlated with performance across all sites, with remarkably high predictive power. Seeds from populations with longer roots, larger seeds and earlier emergence were significantly more likely to survive the first growing season (R-2 = 0.66, p < 0.0001). In contrast, while some abiotic variables at the collection location (e.g. 30-year average summer precipitation and fall minimum temperatures) were associated with field performance at some sites, abiotic variables explained less variation in performance than traits (average R-2 = 0.22). Despite the low predictive power of abiotic variables, populations that performed best at each field site were from locations with climate variables similar to planting sites. Synthesis and applications. The best seed sources for restoration of Elymus elymoides in invaded sites were populations with longer roots, larger seeds and earlier emergence. These easily measured traits were strong predictors of survival in disturbed field sites. While the most successful populations were found in areas with similar abiotic conditions as planting sites, there was phenotypic variation even among populations originating from locations with similar conditions. Thus, our results indicate that abiotic conditions are important considerations when selecting seeds, but these conditions may not sufficiently predict which populations will establish. Understanding population differences in seedling functional traits can improve predictions of restoration success.
英文关键词	adaptation Bromus tectorum Elymus elymoides functional traits Great Basin natural selection restoration wild populations
类型	Article
语种	英语
国家	USA
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000469987000005
WOS关键词	PLANT PERFORMANCE ; CONCEPTUAL ISSUES ; NATURAL-SELECTION ; LOCAL ADAPTATION ; LIMITS ; GERMINATION ; VEGETATION ; RANGELANDS ; PRIORITY ; SURVIVAL
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/2XILL650/216677
作者单位	1.Univ Nevada, Reno, NV 89557 USA; 2.Earlham Coll, Richmond, IN USA; 3.Univ Calif Sierra Foothill Res & Extens Ctr, Browns Valley, CA USA
推荐引用方式 GB/T 7714	Leger, Elizabeth A.,Atwater, Daniel Z.,James, Jeremy J.. Seed and seedling traits have strong impacts on establishment of a perennial bunchgrass in invaded semi-arid systems[J],2019,56(6):1343-1354.
APA	Leger, Elizabeth A.,Atwater, Daniel Z.,&James, Jeremy J..(2019).Seed and seedling traits have strong impacts on establishment of a perennial bunchgrass in invaded semi-arid systems.JOURNAL OF APPLIED ECOLOGY,56(6),1343-1354.
MLA	Leger, Elizabeth A.,et al."Seed and seedling traits have strong impacts on establishment of a perennial bunchgrass in invaded semi-arid systems".JOURNAL OF APPLIED ECOLOGY 56.6(2019):1343-1354.