Climate change and its effects on marine food web with the concentration of pelagic fishes in the northern Arabian Sea

Kashani, Imtiaz; Panhwar, Sher Khan; Kachhi, Kishwar Kumar

doi:10.5697/USFE4011

Artykuł - szczegóły

Tytuł artykułu

Climate change and its effects on marine food web with the concentration of pelagic fishes in the northern Arabian Sea

Autorzy

Kashani Imtiaz , Panhwar Sher Khan , Kachhi Kishwar Kumar

Wybrane pełne teksty z tego czasopisma

Identyfikatory

DOI

10.5697/USFE4011

Warianty tytułu

Języki publikacji

Abstrakty

The northern Arabian Sea, a vital ecosystem that sustains a significant population through its fisheries is increasingly threatened by climate change, overharvest, and coastal pollution. To evaluate the combined effects of these pressures on fishery health, microplankton, fish bycatch, and coastal environment data were examined between 2019 and 2023 from key hotspots. Using the time-cumulated indicator (TCI) and efficiency cumulated indicator (ECI) approaches, we aimed to determine broader spectrum of energy flow in the ecosystem. The findings revealed a delicate equilibrium in the ecosystem. Although average temperatures remained stable, variations in rainfall patterns suggested potential changes in salinity and dissolved oxygen levels, signaling subtle climate change influences. Biological indicators highlighted dynamic shifts: species diversity fluctuated, suggesting community restructuring, while increased evenness implied potential ecological stabilization. The production and biomass (P/B) ratio was higher in 2019, reflecting faster biomass production compared to the slower rate observed in 2023. This instability may be attributed to environmental changes, altered species composition, and a steady increase in fishing pressure. Notably, consistent fish catches amidst relatively stable species diversity suggest complex population dynamics. In terms of energy flow and transformation, a significant rise in TCI, suggests accelerated energy transfer, likely driven by a decline in predator population. Additionally, the instability in Residence Time (RT) underscores intricate food web interactions. Our findings highlight the delicate equilibrium of the northern Arabian Sea, as revealed by the overall data and assessment. Understanding these intricate dynamics is crucial for developing effective conservation strategies and promoting sustainable fishing practices.

Słowa kluczowe

equivalent black carbon climate change ecosystem dynamics energy transformation food web dynamics pelagic fishery northern Arabian Sea

Wydawca

Polish Academy of Sciences, Institute of Oceanology
Elsevier

Czasopismo

Oceanologia

Rocznik

2025

Tom

No. 67 (1)

Strony

Art. no. 67110

Opis fizyczny

Bibliogr. 52 poz., rys., tab., wykr.

Twórcy

autor

Kashani Imtiaz

imtiazkashani@gmail.com

Centre of Excellence in Marine Biology, University of Karachi, 75270, Sindh, Pakistan

autor

Panhwar Sher Khan

Centre of Excellence in Marine Biology, University of Karachi, 75270, Sindh, Pakistan

https://orcid.org/0000-0002-1442-5857

autor

Kachhi Kishwar Kumar

Centre of Excellence in Marine Biology, University of Karachi, 75270, Sindh, Pakistan

Bibliografia

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Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-c0331546-3035-4f8c-b901-b0cfbbbf5782