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Demographics and Population Dynamics Project the Future of Hard Coral Assemblages in Little Cayman

Open Journal of Marine Science 2018年第1期8卷 196-213页

作者： Kristi A. foster greg foster Coastal & Marine Ecology Consultants Inc. Nehalem OR USA

Individual hard coral colonies from four representative reef sites around Little Cayman were surveyed yearly between 2010 and 2015, a period of non-disturbance between two elevated seawater temperature anomalies. Photographic censuses produced 7069 annual transitions that were used to describe the demographics (size class frequencies, abundance, area cover) and population dynamics under non-disturbance environmental conditions. Agariciids, Porites asteroides, and Siderastrea radians have replaced acroporids as the predominant massive corals. Recruitment rates were generally low (150 cm2 surface areas, live area cover may remain relatively stable. Projection models indicated that downward population trends would be exacerbated even by mild disturbance (5% - 10% mortality) scenarios. The fate of hard corals on Little Cayman’s reefs was determined to be heavily dependent on the health and transitions of agariciid colonies. Conservation strategies that currently focus on restoration of Caribbean acroporids should be expanded to include agariciids, which were previously considered “weeds”.

关键词： Caribbean Coral Size Class Transitions Vital Rates Recovery Projections Little Cayman

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Coral Assemblages in the Southeastern Arabian Gulf (Qatar and Abu Dhabi, UAE): Various Stages of <i>Acropora</i>Recovery a Decade after Recurrent Elevated Temperature Anomalies

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Open Journal of Marine Science 2013年第2期3卷 28-39页

作者： Kristi A. foster greg foster Suaad Al-Harthi Environment Agency-Abu Dhabi Abu Dhabi United Arab Emirates Nova Southeastern University Oceanographic Center Dania Beach USA

This study describes the coral communities near Qatarand Abu Dhabi (UAE) ten years after the recurrent elevated temperature anomalies of 1996, 1998 and 2002 which resulted in the mass mortality of Acropora spp. Data derived from photo transects taken over a four-year period were analyzed to characterize the existing coral communities, to compare these to the pre- and post-disturbance communities in the adjacent waters near Dubai, and to project the time-frames required for the communities to return to pre-disturbance levels. The massive corals, dominated by Porites spp. and faviids, showed no long-terms affects associated with exposures to the three thermal anomalies;whereas acroporids, comprising 0% - 8% of the live coral cover, were in various stages of recovery. Projections indicated that acroporid regeneration will require 15 - 32 years to achieve the ≥40% pre-disturbance area cover. The existing communities are too small in size and number to be self-seeding;thus, they are dependent upon the recruitment of larvae from remote refuges of colonies that survived the thermal anomalies. Efforts to identify these refuges and to establish appropriate multi-national conservation programs shall become critical to the future survival of acroporids throughout the southeasternArabian Gulfas the projected regeneration times exceed the periods between disturbances, which are expected to occur more frequently as a result of global climate change.

关键词： Coral Community Elevated Temperature Anomaly Mass Mortality Acropora Arabian Gulf Recovery

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World Class Learning:The Significance of the Web for International Education

World Class Learning:The Significance of the Web for Interna...

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全国计算机辅助教育学会第八届学术年会

作者： greg Kearsley Nova Southeastern Univerity

The implications of the world wide web for global education are *** western nations where the web has been available for a few years,we have seen a dramatic growth in its use at all levels of the education *** is every reason to expect this to happen on a worldwide scale once the necessary technology instrastructure is *** main effect of the web is to make educational materials and course offerings easily available in a distance education setting,particularly in multimedia *** is anticipated that the web will foster increased competition among educational institutions and hence place a major role in improving the quality of instruction.

关键词： World Class Learning WWW Internaional Education

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2004年

作者：（美）里克·福斯特（Rick foster）（美）格莱格·希克斯（greg Hicks）曲哲王立非译

全美最佳家庭生活用书:该书阐释了“幸福选择模式”的九个选择，即“意图”、“有责任”、“识别”、“中心”、“重铸”、“选择”、“赞赏”、“给予”以及“诚实”。

关键词：人生哲学人生哲学

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