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Trophic fingerprinting of a pristine but rapidly deteriorating downstream region of a Western Ghats River.

التفاصيل البيبلوغرافية
العنوان: Trophic fingerprinting of a pristine but rapidly deteriorating downstream region of a Western Ghats River.
المؤلفون: Sandra SM; Kerala University of Fisheries and Ocean Studies, Kochi, 682 506, India., Sreekanth GB; ICAR-Central Coastal Agricultural Research Institute, Old Goa, Goa, 403402, India., Ranjeet K; Kerala University of Fisheries and Ocean Studies, Kochi, 682 506, India. ranjeet.kufos@gmail.com.
المصدر: Environmental monitoring and assessment [Environ Monit Assess] 2023 Jul 31; Vol. 195 (8), pp. 1008. Date of Electronic Publication: 2023 Jul 31.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Springer Country of Publication: Netherlands NLM ID: 8508350 Publication Model: Electronic Cited Medium: Internet ISSN: 1573-2959 (Electronic) Linking ISSN: 01676369 NLM ISO Abbreviation: Environ Monit Assess Subsets: MEDLINE
أسماء مطبوعة: Publication: 1998- : Dordrecht : Springer
Original Publication: Dordrecht, Holland ; Boston : D. Reidel Pub. Co., c1981-
مواضيع طبية MeSH: Ecosystem* , Environmental Monitoring*, Animals ; Biodiversity ; Embryonic Development ; Environmental Pollution
مستخلص: Chalakudy River is renowned for its pristine waters and rich ichthyofaunal biodiversity. The downstream area of the river is confronting a series of risks, including pollution, saline water ingression, sand mining, illegal and intensified fishing practices, and invasion of exotic and alien species. A mass balanced ecosystem model was constructed for the downstream region of Chalakudy River (DCR) using Ecopath with Ecosim (EWE), incorporating 12 functional groups to delineate the food web and network flow indices for the period 2020 to 2021. The trophic level (TL) of the ecosystem network ranged from TL-1 (detritus) to TL-3.4 (birds). High fishing pressure is one possible cause for the high ecotrophic efficiency values as evidenced by the fish groups. Both the grazing food chain and detritus food chain (detritivory: herbivory ratio 0.94) contributed more or less equal to the energy transfer between TL. Network analysis of the model indicated a mean transfer efficiency of 12%, with shares from primary producers (14%) and detritus (11%). A mixed trophic impact analysis demonstrated a strong positive impact of primary producers and detritus groups on most of the other ecological groups at higher trophic levels. The DCR model showed a high system throughput (32,464.7 t km -2 year -1 ), low system omnivory (0.09), low connectance index (0.36), low Finn's cycling index (4.9), and mean path length (2.8), low relative ascendency (37.5%), and high system overhead (62.5%). These indices propound that DCR is an immature and developing ecosystem with moderate strength in reserve to resist external perturbations.
(© 2023. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
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فهرسة مساهمة: Keywords: Chalakudy; Ecopath; Ecosystem health; Ecosystem maturity; Energy transfer; Trophic level
تواريخ الأحداث: Date Created: 20230731 Date Completed: 20230801 Latest Revision: 20230810
رمز التحديث: 20231215
DOI: 10.1007/s10661-023-11501-5
PMID: 37523024
قاعدة البيانات: MEDLINE
الوصف
تدمد:1573-2959
DOI:10.1007/s10661-023-11501-5