期刊
JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY
卷 422, 期 -, 页码 20-28出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jembe.2012.04.007
关键词
Intertidal; Metabolism; Pisaster ochraceus; Respiration; Thermal stress; Zonation
资金
- Puget Sound McCormick Scholar Award
- Puget Sound Summer Science Scholar Award
- NOAA [NA04NOS4780264]
- NASA [NNX07AF20, NNG0GE43G, NNX11AP77]
- NSF [OCE1129401, OE0926581]
- French Ministry of Foreign Affairs
- Directorate For Geosciences
- Division Of Ocean Sciences [1129401] Funding Source: National Science Foundation
Vertical zonation within the intertidal results from an interaction between the physical environment and an organism's physiological limits. Bioenergetic costs of emersion are likely to vary based on an organism's vertical location in the intertidal. The present study quantified the metabolic costs of microhabitat choice in the important intertidal predator Pisaster ochraceus. Rates of oxygen consumption (VO2) were measured at a range of ecologically relevant temperatures in both water and air. In both media, rates increased with increasing temperature but, at any given temperature, aerial VO2 was approximately 50% that of aquatic VO2. These rates, along with biomimetic body temperature data from two field sites in Bodega Bay, California, were used to estimate the metabolism of sea stars at different vertical locations over a 10-day period in the summers of 2006, 2007, and 2010. Results suggest that vertical location would have a much smaller effect on sea star VO2 than would inter-annual temperature differences. The influence of higher body temperatures experienced by sea stars at low tide in the mid-high intertidal, as compared to the low intertidal, was almost negligible because aerial VO2 was lower than aquatic VO2. By contrast, the higher average water temperature experienced by sea stars in 2006 yielded a 50% higher metabolic cost relative to sea stars in 2007 and 2010. These results suggest that energetic demands of intertidal organisms can vary markedly according to global environmental fluctuations such as El Nino and Pacific Decadal Oscillations. (C) 2012 Elsevier B.V. All rights reserved.
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