气候变化领域集成服务门户(CCPortal): Seed production patterns of surviving Sierra Nevada conifers show minimal change following drought

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DOI	10.1016/j.foreco.2020.118598
	Seed production patterns of surviving Sierra Nevada conifers show minimal change following drought
	Wright M.C.; van Mantgem P.; Stephenson N.L.; Das A.J.; Keeley J.E.
发表日期	2021
ISSN	0378-1127
卷号	480
英文摘要	Reproduction is a key component of ecological resilience in forest ecosystems, so understanding how seed production is influenced by extreme drought is key to understanding forest recovery trajectories. If trees respond to mortality-inducing drought by preferentially allocating resources for reproduction, the recovery of the stand to pre-drought conditions may be enhanced accordingly. We used a 20-year annual seed capture data set to investigate whether seed production by three tree genera commonly found in the Sierra Nevada (Abies, Pinus, and Calocedrus) was correlated with variation in local weather, which included an extreme drought spanning multiple years. We tested whether average seed production differed during the drought years, and whether annual seed counts could be explained by three weather variables: spring temperature, annual precipitation, and summer climatic water deficit (CWD). We fit models testing for four separate effects: (1) a priming year model (weather 1 year prior to reproductive bud initiation), (2) a bud initiation model (weather in the year of reproductive bud initiation), (3) a pollination year model (weather in the year of pollination), and (4) maturation year model (weather in the year of seed maturation). For genera with two-year reproductive cycles, the pollination and maturation models were combined. We found support for the summer CWD Abies maturation year model, which suggested higher seed outputs immediately following dry summer conditions. The spring temperature pollination year model was selected for Pinus, which suggested that seed output is higher following warm spring weather during pollination. The annual precipitation priming year model was selected for Calocedrus, which showed a negative association between seed production and wetter conditions two years prior to seed production. More parent tree basal area resulted in higher seed output for all genera, though the confidence intervals overlapped 0 for Calocedrus. Permutation tests suggested there was no systematic difference in mean seed production during the drought after accounting for live tree basal area, regardless of genus. These results highlight the variability in response across genera, and suggest that the influence of seed production on forest recovery following drought-related mortality may depend on affected species and the timing of the mortality event within the masting cycle. A greater understanding of species-level masting to drought stress is needed to more precisely predict community-level recovery following drought. © 2020
英文关键词	Abies; Calocedrus; Drought; Masting; Pinus; Seed production; Sierra Nevada
语种	英语
scopus关键词	Cell proliferation; Drought; Ecosystems; Geothermal springs; Recovery; Springs (components); Annual precipitation; Confidence interval; Drought conditions; Initiation models; Permutation tests; Reproductive cycle; Separate effects; Spring temperatures; Forestry; basal area; confidence interval; coniferous tree; data set; drought stress; mortality; pollination; seed production; Drought; Ecosystems; Forestry; Pollination; Recovery; Reproduction; Seeds; Trees; Sierra Nevada; Abies; Calocedrus; Coniferophyta
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154832
作者单位	United States Geological Survey, Western Ecological Research Center, Redwood Field Station, 1655 Heindon Road, Arcata, CA 95521, United States; United States Geological Survey, Western Ecological Research Center, Sequoia and Kings Canyon Field Station, 47050 Generals Highway #4, Three Rivers, CA 93271-9651, United States
推荐引用方式 GB/T 7714	Wright M.C.,van Mantgem P.,Stephenson N.L.,et al. Seed production patterns of surviving Sierra Nevada conifers show minimal change following drought[J],2021,480.
APA	Wright M.C.,van Mantgem P.,Stephenson N.L.,Das A.J.,&Keeley J.E..(2021).Seed production patterns of surviving Sierra Nevada conifers show minimal change following drought.Forest Ecology and Management,480.
MLA	Wright M.C.,et al."Seed production patterns of surviving Sierra Nevada conifers show minimal change following drought".Forest Ecology and Management 480(2021).