期刊
JOURNAL OF PHYCOLOGY
卷 57, 期 3, 页码 831-848出版社
WILEY
DOI: 10.1111/jpy.13119
关键词
calcification; coralline algae; environmental conditions; field experiment; photosynthesis; physiology; plasticity; rhodoliths
资金
- Consejo Nacional de Ciencia y Tecnologia (CONACyT)
- French National Research Agency through the investment expenditure program [IDEALG ANR-10-BTBR]
- French National Research Agency through project EC2CO MAERLCHANGE
The study examines the physiology of free-living red coralline algae in the Bay of Brest, showing how different species and morphological variations are affected by seasonality and local environmental conditions. The research highlights the adaptability and plasticity of maerl physiology in response to environmental changes, with implications for maerl persistence.
Free-living red coralline algae play an important role in the carbon and carbonate cycles of coastal environments. In this study, we examined the physiology of free-living coralline algae-forming maerl beds in the Bay of Brest (Brittany, France), where Lithothamnion corallioides is the dominant maerl (i.e., rhodolith) species. Phymatolithon calcareum and Lithophyllum incrustans are also present (in lower abundances) at a specific site in the bay. We aimed to assess how maerl physiology is affected by seasonality and/or local environmental variations at the inter- and intraspecific levels. Physiological measurements (respiration, photosynthetic, and calcification rates) were performed using incubation chambers in winter and summer to compare (1) the dominant maerl species at three sites and (2) three coexisting maerl species at one site. Comparison of the three coexisting maerl species suggests that L. corallioides is the best adapted to the current environmental conditions in the Bay of Brest, because this species is the most robust to dissolution in the dark in winter and has the highest calcification efficiency in the light. Comparisons of L. corallioides metabolic rates between stations showed that morphological variations within this species are the main factor affecting its photosynthetic and calcification rates. Environmental factors such as freshwater inputs also affect its calcification rates in the dark. In addition to interspecies variation in maerl physiology, there were intraspecific variations associated with direct (water physico-chemistry) or indirect (morphology) local environmental conditions. This study demonstrates the plasticity of maerl physiology in response to environmental changes, which is fundamental for maerl persistence.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据