【摘 要】
：
Obvious spatiotemporal heterogeneity is a distinct characteristic of ecosystems in subtropical bays.To aid targeted management and ecological restoration in long and narrow semi-enclosed subtropical bays,we analyzed seasonal and regional differences in lo
【机 构】
：
Key Laboratory of Marine Ecosystem Dynamics,Second Institute of Oceanography,Ministry of Natural Res
论文部分内容阅读
Obvious spatiotemporal heterogeneity is a distinct characteristic of ecosystems in subtropical bays.To aid targeted management and ecological restoration in long and narrow semi-enclosed subtropical bays,we analyzed seasonal and regional differences in long-term changes (1980-2019) in the biomass and abundance of large mesozooplankton (LMZ;＞505 μmn) in Xiangshan Bay,Zhejiang,China.We found spatiotemporal heterogeneity in the historical changes of LMZ.Significant negative trends in LMZ biomass were found in the inner and middle bay during the warm season (summer and autumn),when the nutrient concentration (especially dissolved inorganic nitrogen) and temperature increased simultaneously.Nutrient changes in Xiangshan Bay began in the late 1980s or early 1990s,coinciding with large-scale fish cage development.A rapid decline in LMZ biomass occurred after 2005 when power plants commenced operation,accelerating the warming trend.Therefore,the joint stress of eutrophication and warming likely precipitated the decline in LMZ biomass.Conversely,a significant increase in LMZ biomass was found in the outer bay in spring.This trend was consistent with the trend of LMZ biomass near the Changjiang (Yangtze)River estuary,which indicates that the pelagic ecosystem in the outer bay was affected by water from the Changjiang River estuary during spring.Based on our results,ecosystem management and restoration in semi-enclosed subtropical bays should focus on internal waters,which have a poor capacity for water exchange.For Xiangshan Bay,the changes in the Changjiang River estuary ecosystem during the cold season (winter and spring) should also be considered.
其他文献
Magnetotactic bacteria (MTB) are a group of microorganisms capable of orientating and swimming along magnetic fields because they contain intracellular biomineralized magnetosomes composed of magnetite (Fe3O4) or/and greigite (Fe3S4).They are ubiquitous i
Sea cucumbers are echinoderm species with a leathery skin and an elongated body.Natural compounds,including saponins,have been previously isolated from sea cucumber.The majority of saponins derived from this organism typically belong to the triterpene gly
Marine ranching can be regarded as a type of artificial fishery,and its construction aims at the sustainable utilisation of fishery resources.Therefore,the sustainable yield level of target species in marine ranching has become one of the concerns of stak
To overcome the capacity crunch of optical communications based on the traditional single-mode fiber[SMF],different modes in a few-mode fiber[FMF]can be employed for mode division multiplexing[MDM].MDM can also be extended to photonic integration for obta
Magnetotactic bacteria (MTB),ubiquitous in soil and fresh and saltwater sources have been identified in the microbiome of humans and many animals.MTB endogenously produce magnetic nanocrystals enabling them to orient and navigate along geomagnetic fields.
Seahorses have evolved many unique biological traits,including a male brood pouch,the absence of caudal and pelvic fins,and the lack of spleen and gut-associated lymphatic tissue.The mitogen-activated protein kinases (MAPKs) are known to be involved in va
Magnetotactic bacteria can orientate in the Earth\'s magnetic field to search for their preferred microoxic environments,which is achieved by their unique organelles,the magnetosomes.Magnetosomes contain nanometer-sized crystal particles of magnetic iro
Velocity vertical profiles in the bottom boundary layer are important to understand the oceanic circulation.The logarithmic vertical profile,u=Alnz+B,is the universal profile for the horizontal velocity in the boundary layer,in which two coefficients (A a
Magnetotactic bacteria (MTB) are ubiquitous prokaryotes that orient along magnetic field lines due to magnetosomes\' biomineralization within the cell.These structures are ferrimagnetic organelles that impart a magnetic moment to the cell.To succeed in
The genus Neglectella Vodenicarov & Benderliev has a morphology similar to the well-known genus Ooeystis,except for the numerous chloroplasts stacked in the surface layer of the cell.Neglectella subsequently experienced complex taxonomy changes with membe