Climate change can cause complex responses in Baltic Sea macroalgae: A systematic review

Antti Takolander, Mar Cabeza, Elina Leskinen

Research output: Contribution to journalReview ArticleScientificpeer-review

Abstract

Estuarine macroalgae are important primary producers in aquatic ecosystems, and often foundation species providing structurally complex habitat. Climate change alters many abiotic factors that affect their long-term persistence and distribution. Here, we review the existing scientific literature on the tolerance of key macroalgal species in the Baltic Sea, the world's largest brackish water body. Elevated temperature is expected to intensify coastal eutrophication, further promoting growth of opportunistic, filamentous species, especially green algae, which are often species associated with intensive filamentous algal blooms. Declining salinities will push the distributions of marine species towards south, which may alter the Baltic Sea community compositions towards a more limnic state. Together with increasing eutrophication trends this may cause losses in marine-originating foundation species such as Fucus, causing severe biodiversity impacts. Experimental results on ocean acidification effects on macroalgae are mixed, with only few studies conducted in the Baltic Sea. We conclude that climate change can alter the structure and functioning of macroalgal ecosystems especially in the northern Baltic coastal areas, and can potentially act synergistically with eutrophication. We briefly discuss potential adaptation measures.
Original languageEnglish
JournalJournal of Sea Research
Volume123
Pages (from-to)16-29
ISSN1385-1101
DOIs
Publication statusPublished - 22 Mar 2017
MoE publication typeA2 Review article in a scientific journal

Fields of Science

  • 1181 Ecology, evolutionary biology

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