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Invasion Biology provides a comprehensive and up-to-date review of the science of biological invasions while also offering new insights and perspectives relating to the processes of introduction, establishment, and spread. The book connects science with application by describing the health, economic, and ecological impacts of invasive species as well as the variety of management strategies developed to mitigate harmful impacts.The author critically evaluates the approaches, findings, and controversies that have characterized invasion biology in recent years, and suggests a variety of future research directions. Carefully balanced to avoid distincttaxonomic, ecosystem, and geographic (both investigator and species) biases, the book addresses a wide range of invasive species (including protists, invertebrates, vertebrates, fungi, and plants) which have been studied in marine, freshwater, and terrestrial environments throughout the world by investigators equally diverse in their origins.
In this edited volume, global experts in ecology and evolutionary biology explore how theories in ecology elucidate the processes of invasion, while also examining how specific invasions inform ecological theory. This reciprocal benefit is highlighted in a number of scales of organization: population, community and biogeographic. The text describes example invaders in all major groups of organisms and from a number of regions around the globe.
Many conservationists argue that invasive species form one of the most important threats to ecosystems the world over, often spreading quickly through their new environments and jeopardising the conservation of native species. As such, it is important that reliable predictions can be made regarding the effects of new species on particular habitats. This book provides a critical appraisal of ecosystem theory using case studies of biological invasions in Australasia. Each chapter is built around a set of 11 central hypotheses from community ecology, which were mainly developed in North American or European contexts. The authors examine the hypotheses in the light of evidence from their particular species, testing their power in explaining the success or failure of invasion and accepting or rejecting each hypothesis as appropriate. The conclusions have far-reaching consequences for the utility of community ecology, suggesting a rejection of its predictive powers and a positive reappraisal of natural history.
Invasion ecology is the study of the causes and consequences of the introduction of organisms to areas outside their native range. Interest in this field has exploded in the past few decades. Explaining why and how organisms are moved around the world, how and why some become established and invade, and how best to manage invasive species in the face of global change are all crucial issues that interest biogeographers, ecologists and environmental managers in all parts of the world. This book brings together the insights of more than 50 authors to examine the origins, foundations, current dimensions and potential trajectories of invasion ecology. It revisits key tenets of the foundations of invasion ecology, including contributions of pioneering naturalists of the 19th century, including Charles Darwin and British ecologist Charles Elton, whose 1958 monograph on invasive species is widely acknowledged as having focussed scientific attention on biological invasions.
Three species of hydrozoans, Maeotias marginata, Moerisia sp., and Cordylophora caspia, are established in the San Francisco Estuary, CA (SFE). These species are of concern as they may be competing with important fish in the system and disrupting the planktivorous food web. They are novel predators in the SFE and, thus, have an especially high likelihood of impacting the system. Very little is known about their basic biology and life history. In my dissertation research, I aimed to address some basic questions in invasion biology in order to understand these species and the impact they may be having. In Chapter 1, I developed a suite of molecular markers to use as a tool for understanding these populations. I characterized 10 new microsatellite markers each for Maeotias marginata and Moerisia sp. In Chapter 2, I used these molecular markers to investigate population structure, genetic diversity, and determine reproductive strategies of Maeotias marginata and Moerisia sp. I found both species had high levels of overall genetic diversity (Average HE̳ = 0.61 and 0.57 for M. marginata and Moerisia sp. respectively) but also detected evidence of asexual reproduction. In addition, I conducted genetic sequence analyses using samples of Moerisia sp. from the SFE and M. lyonsi from Chesapeake Bay. I found 100% sequence similarity showing that Moerisia sp. in the SFE is M. lyonsi. In Chapter 3, I conducted laboratory experiments to determine temperature and salinity tolerances and feeding ecology in C. caspia. Warmer temperatures resulted in higher growth rates, with the maximum growth at 25 C, but salinity did not impact growth. I found C. caspia eats a wide range of mostly planktonic prey items, proportional to prey availability, and digestion times for one prey item ranged from 48-69 minutes. Collectively, this body of work aids in the understanding of what leads these species to be successful invaders and how they may be impacting the system.

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