Warm temperatures, cool sponges: the effect of increased temperatures on the Antarctic sponge Isodictya sp.

PeerJ

article

Marcelo González-Aravena¹  Nathan J. Kenny²  Magdalena Osorio¹  Alejandro Font¹  Ana Riesgo²  César A. Cárdenas¹ 

[1] Departamento Científico, Instituto Antártico Chileno;Life Sciences;Life Sciences, Oxford Brookes University

关键词: Porifera;    Thermal stress;    Climate change;    Transcriptome;    Western Antarctic Peninsula;   

DOI  :  10.7717/peerj.8088

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Although the cellular and molecular responses to exposure to relatively high temperatures (acute thermal stress or heat shock) have been studied previously, only sparse empirical evidence of how it affects cold-water species is available. As climate change becomes more pronounced in areas such as the Western Antarctic Peninsula, both long-term and occasional acute temperature rises will impact species found there, and it has become crucial to understand the capacity of these species to respond to such thermal stress. Here, we use the Antarctic sponge Isodictya93.7% metazoan BUSCO genes) we have begun to discern the molecular response employed by Isodictya to adjust to heat exposure. Our initial analyses suggest that TGF-β, ubiquitin and hedgehog cascades are involved, alongside other genes. However, the degree and type of response changed little from 3 to 5 °C in the time frame examined, suggesting that even moderate rises in temperature could cause stress at the limits of this organism’s capacity. Given the importance of sponges to Antarctic ecosystems, our findings are vital for discerning the consequences of short-term increases in Antarctic ocean temperature on these and other species.

【 授权许可】

CC BY