Contrasting impacts of warming and browning on periphyton

Sammanfattning

We tested interactive effects of warming (+2 degrees C) and browning on periphyton accrual and pigment composition when grown on a synthetic substrate (plastic strips) in the euphotic zone of 16 experimental ponds. We found that increased colored dissolved organic matter (cDOM) and associated nutrients alone, or in combination with warming, resulted in a substantially enhanced biomass accrual of periphyton, and a comparatively smaller increase in phytoplankton. This illustrates that periphyton is capable of using nutrients associated with cDOM, and by this may affect nutrient availability for phytoplankton. However, warming weakened the positive impact of browning on periphyton accrual, possibly by thermal compensation inferred from altered pigment composition, and/or changes in community composition. Our results illustrate multiple impacts of climate change on algal growth, which could have implications for productivity and consumer resource use, especially in shallow areas in northern lakes.

Publicerad i

Limnology and Oceanography Letters
2023, volym: 8, nummer: 4, sidor: 628-638
Utgivare: WILEY

SLU författare

• Myrstener, Maria

  • Institutionen för skogens ekologi och skötsel, Sveriges lantbruksuniversitet
    

Globala målen (SDG)

SDG13 Bekämpa klimatförändringarna

UKÄ forskningsämne

Oceanografi, hydrologi, vattenresurser

Publikationens identifierare

• DOI: https://doi.org/10.1002/lol2.10317

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/121657