气候变化领域集成服务门户(CCPortal): Benthic jellyfish dominate water mixing in mangrove ecosystems

CCPortal

DOI	10.1073/pnas.2025715118
	Benthic jellyfish dominate water mixing in mangrove ecosystems
	Durieux D.M.; du Clos K.T.; Lewis D.B.; Gemmell B.J.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:30
英文摘要	Water mixing is a critical mechanism in marine habitats that governs many important processes, including nutrient transport. Physical mechanisms, such as winds or tides, are primarily responsible for mixing effects in shallow coastal systems, but the sheltered habitats adjacent to mangroves experience very low turbulence and vertical mixing. The significance of biogenic mixing in pelagic habitats has been investigated but remains unclear. In this study, we show that the upside-down jellyfish Cassiopea sp. plays a significant role with respect to biogenic contributions to water column mixing within its shallow natural habitat (< 2 m deep). The mixing contribution was determined by high-resolution flow velocimetry methods in both the laboratory and the natural environment. We demonstrate that Cassiopea sp. continuously pump water from the benthos upward in a vertical jet with flow velocities on the scale of centimeters per second. The volumetric flow rate was calculated to be 212 L·h-1 for average-sized animals (8.6 cm bell diameter), which translates to turnover of the entire water column every 15 min for a median population density (29 animals per m2). In addition, we found Cassiopea sp. are capable of releasing porewater into the water column at an average rate of 2.64 mL·h−1 per individual. The release of nutrient-rich benthic porewater combined with strong contributions to water column mixing suggests a role for Cassiopea sp. as an ecosystem engineer in mangrove habitats. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Cassiopea; Jellyfish; Mangroves; Particle image velocimetry; Water mixing
语种	英语
scopus关键词	water; Article; benthos; Cassiopea; ecosystem; flow rate; habitat; jellyfish; mangrove; nonhuman; particle image velocimetry; water and water related phenomena; water flow; water mixing
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238847
作者单位	Department of Integrative Biology, University of South Florida, Tampa, FL 33620, United States
推荐引用方式 GB/T 7714	Durieux D.M.,du Clos K.T.,Lewis D.B.,et al. Benthic jellyfish dominate water mixing in mangrove ecosystems[J],2021,118(30).
APA	Durieux D.M.,du Clos K.T.,Lewis D.B.,&Gemmell B.J..(2021).Benthic jellyfish dominate water mixing in mangrove ecosystems.Proceedings of the National Academy of Sciences of the United States of America,118(30).
MLA	Durieux D.M.,et al."Benthic jellyfish dominate water mixing in mangrove ecosystems".Proceedings of the National Academy of Sciences of the United States of America 118.30(2021).