气候变化领域集成服务门户(CCPortal): Boom and bust: the effects of masting on seed predator range dynamics and trophic cascades

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DOI	10.1111/ddi.13861
	Boom and bust: the effects of masting on seed predator range dynamics and trophic cascades
	Hallworth, Michael T.; Siren, Alexej P. K.; Deluca, William V.; Duclos, Timothy R.; Mcfarland, Kent P.; Hill, Jason M.; Rimmer, Christopher C.; Morelli, Toni Lyn
发表日期	2024
ISSN	1366-9516
EISSN	1472-4642
英文摘要	Aim: Spatiotemporal variation in resource availability is a strong driver of animal distributions. In the northern hardwood and boreal forests of the northeastern United States, tree mast events provide resource pulses that drive the population dynamics of small mammals, including the American red squirrel (Tamiasciurus hudsonicus), a primary songbird nest predator. This study sought to determine whether mast availability ameliorates their abiotic limits, enabling red squirrel elevational distributions to temporarily expand and negatively impact high-elevation songbirds. Location: Northeastern United States. Methods: We used two independent datasets to evaluate our hypotheses. First, we fit a dynamic occupancy model using data from camera trap surveys to evaluate red squirrel distributional responses to pulses in the tree mast. We also assessed population responses using systematic auditory surveys analysed with an open-population binomial mixture model. Further, we used modelled red squirrel abundance in nest-survival models to evaluate whether their abundance is correlated with the daily nest survival of three songbird species. Results: The tree mast provided a critical resource pulse that resulted in a two-fold increase in the annual elevational distribution of red squirrels. The elevational distribution of red squirrels ranged from a minimum of similar to 450 m (range: 663-1145 m asl) following two consecutive years without a masting event to a maximum of over 1000 m (range: 443-1545 m asl) after a large mast event. The daily nest survival of three songbird species tended to decline with an increase in the abundance of red squirrels. Main Conclusions: Tree mast is a central biological phenomenon in many temperate and boreal forests. This study reveals how this resource pulse results in range changes in a small mammal that is both a seed and bird predator, as well as prey for many carnivores. Thus, understanding this phenomenon can inform the conservation and management of northern forests, including breeding songbirds.
英文关键词	dynamic occupancy; elevational range limits; predator-prey; red squirrel; seed mast; temperate boreal ecotone
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology
WOS记录号	WOS:001228920300001
来源期刊	DIVERSITY AND DISTRIBUTIONS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304051
作者单位	University of Massachusetts System; University of Massachusetts Amherst; United States Department of the Interior; United States Geological Survey
推荐引用方式 GB/T 7714	Hallworth, Michael T.,Siren, Alexej P. K.,Deluca, William V.,et al. Boom and bust: the effects of masting on seed predator range dynamics and trophic cascades[J],2024.
APA	Hallworth, Michael T..,Siren, Alexej P. K..,Deluca, William V..,Duclos, Timothy R..,Mcfarland, Kent P..,...&Morelli, Toni Lyn.(2024).Boom and bust: the effects of masting on seed predator range dynamics and trophic cascades.DIVERSITY AND DISTRIBUTIONS.
MLA	Hallworth, Michael T.,et al."Boom and bust: the effects of masting on seed predator range dynamics and trophic cascades".DIVERSITY AND DISTRIBUTIONS (2024).