Taxonomic and Functional Beta Diversity Patterns and Their Driving Factors of the Fish Assemblages Around Marine Islands

Journal of Marine Science and Engineering, Journal Year: 2025, Volume and Issue: 13(4), P. 674 - 674

Published: March 27, 2025

Beta diversity is an important way to analyze community assembly mechanisms in different habitats or along environmental gradients. However, research on marine fish assemblages around islands has lagged, especially for functional beta diversity. In this study, we evaluated taxonomic and change of island the coast two seasons revealed its relationship with factors geographical distance. Taxonomic were both dominated by turnover (over 80% 60%), while contribution nestedness was significantly increased. Environmental such as temperature dissolved oxygen drivers rather than Fish that are far away from mainlands affected greatly anthropogenic activities usually have higher These results indicated filtration primary factor driving mechanism assembly. Our study importance integrated application facets biodiversity investigate The findings can provide theoretical support protection planning protected areas future.

Language: Английский

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Four decades of climatic fluctuations and fish recruitment stability across a marine‐freshwater gradient

Global Change Biology, Journal Year: 2022, Volume and Issue: 28(17), P. 5104 - 5120

Published: May 18, 2022

Abstract Investigating the effects of climatic variability on biological diversity, productivity, and stability is key to understanding possible futures for ecosystems under accelerating climate change. A critical question estuarine is, how does influence juvenile recruitment different fish species life histories that use estuaries as nurseries? Here we examined spatiotemporal abundance trends environmental responses 18 frequently spend stage rearing in San Francisco Estuary, CA, USA. First, constructed multivariate autoregressive state‐space models using age‐0 abundance, freshwater flow ( ), sea surface temperature data SST ) collected over four decades. Next, calculated coefficients variation (CV) assess portfolio (1) within among species, (anadromous, marine opportunist, or dependent), whole community; (2) regions estuary. We found abundances varied space time (increasing, decreasing, dynamically stable); 83% cases, response conditions (wet/dry, cool/warm periods). Anadromous responded strongly upper estuary, opportunist and/or lower dependent had diverse across Overall, community when considered entire estuary lowest CV, provided strong insurance (2.4‐ 3.5‐fold increases stability, respectively). Spatial also increased although a lesser extent (up 1.6‐fold increases). Our study advances notion controlled by biocomplexity—life history diversity environment. However, intensified drought heatwaves may increase risk multiple consecutive failures synchronizing dynamics trajectories via Moran effects, potentially diminishing nursery function.

Language: Английский

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Resilient rivers and connected marine systems: a review of mutual sustainability opportunities

Global Sustainability, Journal Year: 2022, Volume and Issue: 6

Published: Nov. 25, 2022

Non-technical summary Rivers are crucial to the water cycle, linking landscape sea. Human activities, including effluent discharge, use and fisheries, have transformed resilience of many rivers around globe. Sustainable development goal (SDG) 14 prioritizes addressing same issues in marine ecosystems. This review illustrates how contribute directly indirectly SDG outcomes, also provides ways potentially address them through a river sea view on policy, management research. Technical The United Nations initiated SDGs produce ‘a shared blueprint for peace prosperity people planet, now into future’. Established 2015, progress directed at aquatic environment is slow despite an encroaching 2030 deadline. modification flow regimes combined with other anthropogenic pressures underpin ecological impacts across Current targets (life below water) do not incorporate interrelationships systems systematically, nor they provide recommendations improve existing policy comprehensive manner. Therefore, this aims illustrate linkages between ecosystems concerning land sea-based strategies reach sustainability goals. We applied case study show opportunities can be explored. three major areas where mutual present: (1) estuary ecosystem (targets 14.1, 14.2, 14.3, 14.5); (2) resilient part global fisheries concerns 14.4, 14.6, 14.7, 14.B) (3) enhancing research from environmental flows perspective 14.A, 14.C). Social media Restoring their helps fulfil 14.

Language: Английский

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Bioenrichment preference and human risk assessment of arsenic and metals in wild marine organisms from Dapeng (Mirs) Bay, South China Sea

Marine Pollution Bulletin, Journal Year: 2023, Volume and Issue: 194, P. 115305 - 115305

Published: July 27, 2023

Language: Английский

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Defining estuarine squeeze: The loss of upper estuarine transitional zones against in-channel barriers through saline intrusion

Estuarine Coastal and Shelf Science, Journal Year: 2022, Volume and Issue: 278, P. 108107 - 108107

Published: Oct. 18, 2022

Here we define, for the first time, concept of estuarine squeeze and lay out recommendations consistent use terminology this new but critical research area. Climate catchment-driven reductions in river flow together with rising sea levels are increasing salinities driving saltwater into upper zones. This saline intrusion is exacerbated regions where land level falling (i.e. relative rise) catchments subject to high freshwater demand water regulation, which reduces flow. In unmodified systems, many estuaries would naturally migrate inland response rise. However, some most anthropogenically impacted ecosystems world, being settlement development hubs due ecosystem services they provide. To protect these assets, have man-made in-channel barriers (such as dams, weirs sluices) at their tidal limits, a trend that likely continue future against impacts climate change. As rise flows reduce, will move further inland. be detrimental estuarine, low salinity (oligohaline) zones, progressively become 'squeezed out' barriers. We termed 'estuarine squeeze' define 'the progressive loss extent oligohaline zones through driven by and/or flow'. A lack structure functioning particular means impact reduction on wider estuary unknown. there indications may play key role biogeochemical cycling, habitat provision, primary secondary production, food-web functioning, provision trophic subsidies brackish coastal zone. Loss therefore result net function, implications ability provide future.

Language: Английский

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Advancing research in marine functional connectivity for improved policy and management

Marine Ecology Progress Series, Journal Year: 2024, Volume and Issue: 731, P. 1 - 8

Published: Feb. 8, 2024

Marine functional connectivity (MFC) refers to the dynamic spatial exchange of biomass, individuals, genes, and energy via collective movements all marine organisms during their lifetimes. In addition controlling distribution resilience biodiversity exploited stocks, MFC plays a key role in structure functioning ecosystems, at sea land-sea interface. As ecosystems species face climate change unprecedented multiple anthropogenic pressures, rapid action is needed comprehend patterns changes order anticipate fates ocean services humanity. Despite many advances techniques measure or infer species’ distributions dynamics, significant progress still necessary. A full understanding requires better knowledge relationships between communities habitats, quantification fluxes matter energy, capacity forecast how provided by may change. The 17 papers this Theme Section showcase range approaches scales applied contemporary studies encompass diversity taxa investigated worldwide. innovative presented here advance science pave way enrich current MFC’s ecosystem functioning, flag can be protect resources manage littoral habitats.

Language: Английский

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Artisanal fishing affects the local distribution of broad‐snouted caiman (Caiman latirostris) within the Atlantic Forest of Brazil

Aquatic Conservation Marine and Freshwater Ecosystems, Journal Year: 2024, Volume and Issue: 34(6)

Published: June 1, 2024

Abstract Artisanal fishing is an important subsistence practice in freshwater habitats worldwide, but overexploitation threatens the conservation of several nontarget species including crocodylians. We investigated effects artisanal on distribution a population broad‐snouted caiman ( Caiman latirostris ) inhabiting Tapacurá reservoir, within highly altered and threatened Atlantic Forest biome. conducted spotlight surveys to detect caimans gillnets deployed reservoir from April 2015 June 2022. evaluated temporal differences gillnet encounter rates relationship between distribution. Gillnet remained consistent year‐round, while were highest near gillnets, especially river channel forested margins. Caimans are opportunistic predators attracted by tangled fish likely prefer with increased abundance. Future research should continue monitoring interaction include local communities efforts.

Language: Английский

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Individual variation and repeatability of Atlantic tarpon Megalops atlanticus migrations in the southern US: implications for conservation and management

Marine Biology, Journal Year: 2023, Volume and Issue: 170(12)

Published: Oct. 23, 2023

Language: Английский

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Altering river flow impacts estuarine species and catches: lessons from giant mud crabs

ICES Journal of Marine Science, Journal Year: 2023, Volume and Issue: 80(9), P. 2295 - 2312

Published: Oct. 19, 2023

Abstract Anthropogenic alterations to river flow could have repercussions for flow-dependent species downstream but few studies account these dynamic relationships or quantify impacts of altered flow. Scylla serrata—a widely distributed portunid crab—was used as an example a model on abundance and catch. Crab population dynamics were modelled across large semi-enclosed tropical sea in northern Australia. Environmental drivers, primarily flow, also temperature the Southern Oscillation Index linked crab explain variability historical catches. Catch then be predicted under scenarios. River significantly improved ability catches some regions not all, strength this relationship varied catchments. Altered flows had negligible effects perennial rivers ephemeral temporally variable rivers, decreases catch ranged from 36 46% average. Our modelling approach showcases way dynamically rigorously key with potential help inform natural resource management, including policy decisions timing, quantity, method water removed rivers.

Language: Английский

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The Egyptian Nile estuarine habitats: a review

Aquatic Sciences, Journal Year: 2024, Volume and Issue: 86(4)

Published: Aug. 12, 2024

Abstract Estuaries are nutrient-rich environments characterized by a gradient in salinity due to the mixing of freshwater and seawater. These bodies water play vital functions nature provide wide variety essential ecosystem services. In general, many natural and/or man-made activities have strongly stressed Egyptian Nile estuarine habitats, as has shortage that was expected after construction Grand Ethiopian Renaissance Dam. recent decades, Delta been considered be one most important productive oil-producing petroleum regions onshore offshore gas discoveries alongside gasoline base oil generation. Up-to-date systematic reviews habitats (Rosetta Damietta) missing, review reported here undertaken fill this gap. review, we consider physical, chemical, geological, pollution, biological parameters estuaries. context, our aim is contribute broader understanding habitat; moreover, potential warning signals may aid environmental protection. We found previous studies had focused on two branches or marine waters adjacent these branches, only few themselves. studies, significant factor distribution different measured while, contrast, more investigations confirm importance effluent sources affecting parameters. highly recommend data updated future aspects.

Language: Английский

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