A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Sea level rise may contribute to the greening of Arctic coastal freshwaters : implications from the ontogeny of Greiner Lake, Nunavut, Canada (2022)

Kivilä, E. H., Rantala, M. V., Antoniades, D., Luoto, T. P., Nevalainen, L., & Rautio, M. (2022). Sea level rise may contribute to the greening of Arctic coastal freshwaters : implications from the ontogeny of Greiner Lake, Nunavut, Canada. Catena, 211, Article 105969. https://doi.org/10.1016/j.catena.2021.105969

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Kivilä, E. Henriikka; Rantala, Marttiina V.; Antoniades, Dermot; Luoto, Tomi P.; Nevalainen, Liisa; Rautio, Milla

Lehti tai sarja: Catena

ISSN: 0341-8162

eISSN: 1872-6887

Julkaisuvuosi: 2022

Volyymi: 211

Artikkelinumero: 105969

Kustantaja: Elsevier

Julkaisumaa: Alankomaat

Julkaisun kieli: englanti

DOI: https://doi.org/10.1016/j.catena.2021.105969

Julkaisun avoin saatavuus: Ei avoin

Julkaisukanavan avoin saatavuus: 

Tiivistelmä

Global sea level rise and increased storm activity triggered by climate change pose a serious threat to low-lying Arctic coastal landscapes, which commonly host numerous freshwater lakes. Marine inundation of these ecosystems would result in significant ecological changes. We elucidated effects of changing levels of marine influence to lake ecosystems by exploring the ontogeny of coastal Greiner Lake in Arctic Canada. Using paleolimnological methods on a sediment core, we explored functional assemblage compositions of aquatic biota (diatoms and chironomids), biomarkers (pigments and fatty acids) and geochemistry (stable isotopes and organic matter) throughout the isolation history of the lake. The biological and geological data collectively indicated a paleoenvironmental shift from marine embayment to brackish lagoon in the Late-Holocene and to a freshwater lake ca. 500 BP. We observed that the lake was most productive during a phase of mixed freshwater and marine influence, based on higher chlorophyll-a and β,β-carotene concentrations, omega-3 fatty acids (ω-3) as well as sediment organic content. We suggest that, in addition to reorganization of aquatic communities and altered ecosystem services provided by coastal lakes, coastal freshwaters may become more productive under increasing marine influence caused by climate change. Global sea level rise may thus trigger a new pathway to increasingly greener Arctic.

YSO-asiasanat: ilmastonmuutokset; merenpinnan vaihtelut; rannikkoalueet; järvet; murtovesi; sedimentit; biomarkkerit; rasvahapot; isotooppianalyysi; paleoekologia; paleolimnologia

Vapaat asiasanat: functional paleoecology; climate change; fatty acid; sedimentary pigment; stable isotope; Victoria Island

Liittyvät organisaatiot

OKM-raportointi: Kyllä

Raportointivuosi: 2022

JUFO-taso: 1