气候变化领域集成服务门户(CCPortal): Interacting effects of increased CO2 and nutrients on seagrass ecosystems during a mesocosm experiment, results in MS Excel format

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.877809
	Interacting effects of increased CO2 and nutrients on seagrass ecosystems during a mesocosm experiment, results in MS Excel format
	Martínez-Crego; Begoña; Olive; Irene; Santos; Rui
发布日期	2014-07-13
数据集类型	dataset
英文简介	Increasing evidence emphasizes that the effects of human impacts on ecosystems must be investigated using designs that incorporate the responses across levels of biological organization as well as the effects of multiple stressors. Here we implemented a mesocosm experiment to investigate how the individual and interactive effects of CO2 enrichment and eutrophication scale-up from changes in primary producers at the individual (biochemistry) or population level (production, reproduction, and/or abundance) to higher levels of community (macroalgae abundance, herbivory, and global metabolism), and ecosystem organization (detritus release and carbon sink capacity). The responses of Zostera noltii seagrass meadows growing in low- and high-nutrient field conditions were compared. In both meadows, the expected CO2 benefits on Z. noltii leaf production were suppressed by epiphyte overgrowth, with no direct CO2 effect on plant biochemistry or population-level traits. Multi-level meadow response to nutrients was faster and stronger than to CO2. Nutrient enrichment promoted the nutritional quality of Z. noltii (high N, low CVN and phenolics), the growth of epiphytic pennate diatoms and purple bacteria, and shoot mortality. In the low-nutrient meadow, individual effects of CO2 and nutrients separately resulted in reduced carbon storage in the sediment, probably due to enhanced microbial degradation of more labile organic matter. These changes, however, had no effect on herbivory or on community metabolism. Interestingly, individual effects of CO2 or nutrient addition on epiphytes, shoot mortality, and carbon storage were attenuated when nutrients and CO2 acted simultaneously. This suggests CO2-induced benefits on eutrophic meadows. In the high-nutrient meadow, a striking shoot decline caused by amphipod overgrazing masked the response to CO2 and nutrient additions. Our results reveal that under future scenarios of CO2, the responses of seagrass ecosystems will be complex and context-dependent, being mediated by epiphyte overgrowth rather than by direct effects on plant biochemistry. Overall, we found that the responses of seagrass meadows to individual and interactive effects of CO2 and nutrient enrichment varied depending on interactions among species and connections between organization levels.
空间范围	Median Latitude: 37.008500 * Median Longitude: -7.990900 * South-bound Latitude: 36.996200 * West-bound Longitude: -8.015700 * North-bound Latitude: 37.020800 * East-bound Longitude: -7.966100
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/216463
推荐引用方式 GB/T 7714	Martínez-Crego,Begoña,Olive,et al. Interacting effects of increased CO2 and nutrients on seagrass ecosystems during a mesocosm experiment, results in MS Excel format.2014-07-13.https://doi.org/10.1594/PANGAEA.877809.