مورد إلكتروني
Re-thinking the “ecological envelope” of Eastern Baltic cod (Gadus morhua) : conditions for productivity, reproduction, and feeding over time
| العنوان: | Re-thinking the “ecological envelope” of Eastern Baltic cod (Gadus morhua) : conditions for productivity, reproduction, and feeding over time |
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| بيانات النشر: | Stockholms universitet, Stockholms universitets Östersjöcentrum University of Helsinki, Finland University of Helsinki, Finland University of Helsinki, Finland University of Helsinki, Finland 2022 |
| تفاصيل مُضافة: | Svedäng, Henrik Savchuk, Oleg Villnäs, Anna Norkko, Alf Gustafsson, Bo G. Wikström, Sofia A. Humborg, Christoph |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | Hypoxia is presently seen as the principal driver behind the decline of the former dominating Eastern Baltic cod stock (EBC; Gadus morhua). It has been proposed that both worsening conditions for reproduction and lower individual growth, condition, and survival are linked to hypoxia. Here, we elucidate the ecological envelope of EBC in terms of salinity stratification, oxygen content, and benthic animal biomasses, and how it has affected EBC productivity over time. The spawning conditions started deteriorating in the Gotland Deep in the 1950s due to oxygen depletion. In contrast, in the Bornholm Basin, hydrographic conditions have remained unchanged over the last 60 years. Indeed, the current extent of both well-oxygenated areas and the frequency of hypoxia events do not differ substantially from periods with high EBC productivity in the 1970s–1980s. Furthermore, oxygenated and therefore potentially suitable feeding areas are abundant in all parts of the Baltic Sea, and our novel analysis provides no evidence of a reduction in benthic food sources for EBC over the last 30 years. We find that while reproduction failure is intricately linked to hydrographic dynamics, a relationship between the spread of hypoxia and the decline in EBC productivity during the last decades cannot be substantiated. |
| مصطلحات الفهرس: | benthic biomass, Eastern Baltic cod, hypoxia, productivity, reproduction volume, spatial scales, Biological Sciences, Biologiska vetenskaper, Earth and Related Environmental Sciences, Geovetenskap och miljövetenskap, Article in journal, info:eu-repo/semantics/article, text |
| DOI: | 10.1093.icesjms.fsac017 |
| URL: | ICES Journal of Marine Science, 1054-3139, 2022, 79:3, s. 689-708 |
| الإتاحة: | Open access content. Open access content info:eu-repo/semantics/restrictedAccess |
| ملاحظة: | English |
| أرقام أخرى: | UPE oai:DiVA.org:su-202749 0000-0002-3639-7105 0000-0002-3873-4662 0000-0003-3077-929x 0000-0002-9741-4458 0000-0003-1048-8452 0000-0003-3508-2109 0000-0002-0649-5599 doi:10.1093/icesjms/fsac017 ISI:000757533800001 1306186269 |
| المصدر المساهم: | UPPSALA UNIV LIBR From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1306186269 |
| قاعدة البيانات: | OAIster |
| DOI: | 10.1093.icesjms.fsac017 |
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