气候变化领域集成服务门户(CCPortal): Seawater carbonate chemistry and Antarctic macroalgal biochemical composition and amphipod grazer feeding preferences

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.892654
	Seawater carbonate chemistry and Antarctic macroalgal biochemical composition and amphipod grazer feeding preferences
	Schram; Julie B; Schoenrock; Kathryn M; McClintock; James B; Amsler; Charles D; Angus; Robert A
发布日期	2018-07-26
数据集类型	dataset
英文关键词	Animalia ; Antarctic ; Antarctic ; Arthropoda ; Behaviour ; Benthic animals ; Benthos ; Biomass/Abundance/Elemental composition ; Chromista ; Coast and continental shelf ; Containers and aquaria (20- 1000 L or &lt ; 1 m**2) ; Desmarestia anceps ; Desmarestia menziesii ; Gondogeneia antarctica ; Laboratory experiment ; Macroalgae ; Ochrophyta ; Polar ; Single species ; Species interaction ; Temperature
英文简介	Increased anthropogenic atmospheric CO2 concentrations have resulted in ocean warming and alterations in ocean carbonate chemistry, decreasing seawater pH (ocean acidification). The combination of ocean warming and acidification (OWA) may alter trophic interactions in marine benthic communities along the western Antarctic Peninsula (WAP). Abundant and diverse macroalgae–grazer assemblages, dominated by macroalgae (e.g. chemically defended Desmarestia anceps and D. menziesii) and gammarid amphipods (e.g. Gondogeneia antarctica), occur on the nearshore benthos along the WAP. In the present study, the amphipod G. antarctica and macroalgae D. anceps and D. menziesii were exposed for 39 and 79 d, respectively, to combinations of current and predicted near-future temperature (1.5 and 3.5°C, respectively) and pH (8.0 and 7.6, respectively). Protein and lipid levels of macroalgal tissues were quantified, and 5-way choice amphipod feeding assays were performed with lyophilized macroalgal tissues collected at time zero and following exposure to the 4 temperature-pH treatments. For D. anceps, we found a significant interactive temperature-pH effect on lipid levels and significantly lower protein levels at reduced pH. In contrast, tissues of D. menziesii exhibited significantly greater lipid levels after exposure to reduced pH, but there was no temperature effect on lipid or protein levels. Despite shifts in macroalgal biochemical composition, there were no changes in amphipod feeding preferences. Our results indicate that despite altered macroalgal nutritional quality under OWA, both macroalgae retained their ability to deter amphipod feeding. This deterrent capacity could become an important contributor to net community resistance of macroalgae-mesograzer assemblages of the WAP to predicted OWA.
空间范围	Latitude: -64.766670 * Longitude: -64.050000
时间范围	2013-03-01T00:00:00 - 2013-03-31T00:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/216128
推荐引用方式 GB/T 7714	Schram,Julie B,Schoenrock,et al. Seawater carbonate chemistry and Antarctic macroalgal biochemical composition and amphipod grazer feeding preferences.2018-07-26.https://doi.org/10.1594/PANGAEA.892654.