气候变化领域集成服务门户(CCPortal): Acidification alters predator-prey interactions of blue crab Callinectes sapidus and soft-shell clam Mya arenaria

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.873555
	Acidification alters predator-prey interactions of blue crab Callinectes sapidus and soft-shell clam Mya arenaria
	Glaspie; Cassandra N; Longmire; Katherine; Seitz; Rochelle D
发布日期	2017-03-16
数据集类型	dataset
英文关键词	Animalia ; Arthropoda ; Behaviour ; Benthic animals ; Benthos ; Brackish waters ; Containers and aquaria (20- 1000 L or &lt ; 1 m**2) ; Growth/Morphology ; Laboratory experiment ; Mollusca ; Mortality/Survival ; Mya arenaria ; North Atlantic ; Single species ; Species interaction ; Temperate
英文简介	Acidification due to anthropogenic CO2 pollution, along with episodic or persistent acidification that occurs in coastal environments, will likely result in severe seasonal acidification in estuarine environments. Acidification decreases the fitness of individual species, but the degree to which predator-prey interactions will be impacted is largely unknown. This mesocosm study examined the effect of CO2 acidification on crab-bivalve predator-prey interactions involving two commercially important Chesapeake Bay species, the blue crab Callinectes sapidus and the soft-shell clam Mya arenaria. In particular, the direct effects of CO2 acidification on clam growth and behavior, and the indirect effects of CO2 acidification on interactions between crabs and clams were examined. Mya arenaria were grown in CO2-acidified water (pH 7.2) or ambient conditions (pH 7.8) for 30 days. To determine the effect of acidification on clam responsiveness to mechanical disturbance, a probe was slowly moved towards clams until they ceased pumping (a behavior to avoid detection by predators), and the distance between the probe and the clam's siphon was noted. Clams were exposed to predation by C. sapidus, which were held under acidified or ambient conditions for 48 h. Callinectes sapidus handling time, search time, and encounter rate were measured from video. Acidified clams had lighter shells than ambient clams, indicating that shell dissolution occurred. Acidification reduced the responsiveness of M. arenaria to a mechanical disturbance that simulated an approaching predator. As compared to ambient trials, crabs in acidified trials had higher encounter rates; however, this was offset by crabs taking longer to find the first clam in trials, and by increased occurrence of crabs eating only a portion of the prey available. As a result, there was no net change in predation-related clam mortality in acidified trials as compared to ambient conditions. Understanding how acidification will impact food webs in productive estuarine environments requires an examination of the direct impacts of acidification on organism behavior and physiology, as well as indirect effects of acidification mediated through predator-prey interactions.
空间范围	Latitude: 37.268695 * Longitude: -76.557555
时间范围	2015-06-13T00:00:00 - 2015-07-13T00:00:00
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/216556
推荐引用方式 GB/T 7714	Glaspie,Cassandra N,Longmire,et al. Acidification alters predator-prey interactions of blue crab Callinectes sapidus and soft-shell clam Mya arenaria.2017-03-16.https://doi.org/10.1594/PANGAEA.873555.