气候变化领域集成服务门户(CCPortal): Stable isotopes reveal that foraging strategy dictates trophic response of salt marsh residents to black mangrove Avicennia germinans range expansion

CCPortal

DOI	10.3354/meps14500
	Stable isotopes reveal that foraging strategy dictates trophic response of salt marsh residents to black mangrove Avicennia germinans range expansion
	Loesser, Katherine B.; Powell, Christina E.; Davis, Brandeus; Baustian, Melissa M.; Polito, Michael J.
发表日期	2024
ISSN	0171-8630
EISSN	1616-1599
起始页码	729
卷号	729
英文摘要	Climate warming has facilitated the expansion of black mangrove Avicennia germinans (hereafter 'Avicennia') into smooth cordgrass Spartina alterniflora (hereafter 'Spartina') salt marshes in southeastern Louisiana (USA). As macrophytes contribute to soil organic matter (SOM) and primary production, this transition could alter the basal energy pathways supporting salt marsh food webs. We used bulk-tissue and compound-specific stable isotope analyses (SIA) to determine if changes in dominant macrophytes alter basal energy pathways for 2 salt marsh residents: grass shrimp (Palaemonetes spp.) and marsh periwinkle snails Littoraria irrorata. Specifically, we used Bayesian stable isotope mixing models to quantify the relative contribution of basal energy sources to SOM and resident food webs across a Spartina-Avicennia gradient in southeastern Louisiana. We found that sources of SOM changed in Avicennia-dominated habitat and that foraging strategy dictated trophic responses of salt marsh residents to Avicennia expansion. Marsh periwinkle snail basal energy sources shifted from Spartina to algae (phytoplankton and epiphytic macroalgae) reliance, while grass shrimp basal energy sources remained reliant on algal production, regardless of macrophyte dominance. Compound-specific SIA improved basal energy source distinctions and provided more constrained estimates of their contributions to resident food webs than bulk-tissue SIA. The importance of algal energy across the landscape warrants future investigations into the ability of Avicennia to support the diversity and abundance of algal energy sources present in Louisiana salt marshes. Understanding coastal wetland food web dynamics could help with planning and evaluating the most effective coastal restoration techniques (e.g. prioritizing salt marsh or mangrove habitat) in southeastern Louisiana.
英文关键词	Stable isotope; Avicennia germinans; Spartina alterniflora; Climate change; Food web; Littoraria irrorata; Palaemonetes spp.; Amino acid
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Oceanography
WOS类目	Ecology ; Marine & Freshwater Biology ; Oceanography
WOS记录号	WOS:001180865100004
来源期刊	MARINE ECOLOGY PROGRESS SERIES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/290294
作者单位	Louisiana State University System; Louisiana State University; United States Department of the Interior; United States Geological Survey
推荐引用方式 GB/T 7714	Loesser, Katherine B.,Powell, Christina E.,Davis, Brandeus,et al. Stable isotopes reveal that foraging strategy dictates trophic response of salt marsh residents to black mangrove Avicennia germinans range expansion[J],2024,729.
APA	Loesser, Katherine B.,Powell, Christina E.,Davis, Brandeus,Baustian, Melissa M.,&Polito, Michael J..(2024).Stable isotopes reveal that foraging strategy dictates trophic response of salt marsh residents to black mangrove Avicennia germinans range expansion.MARINE ECOLOGY PROGRESS SERIES,729.
MLA	Loesser, Katherine B.,et al."Stable isotopes reveal that foraging strategy dictates trophic response of salt marsh residents to black mangrove Avicennia germinans range expansion".MARINE ECOLOGY PROGRESS SERIES 729(2024).