from Part V - Other applications
Published online by Cambridge University Press: 05 June 2012
Introduction
Diatoms are major contributors to total primary production as well as many important biogeochemical processes in aquatic environments (Falkowski et al., 1998; Smetacek, 1999). Nonetheless, a small number of species (<30) have been recognized as harmful to fisheries, wildlife, or people, through production of either a toxin or various exudates, or via mechanical damage due to cell morphology and/or high biomass accumulation. Fryxell & Villac (1999), and more recently Fryxell & Hasle (2003), have identified several of these harmful taxa and outlined their often devastating impacts on other organisms, ecosystems, and economies. Examples include: oily surface films associated with bird mortalities (Coscinodiscus centralis Ehrenb., Coscinodiscus concinnus W. Smith); surface accumulations on beach surf-zones affecting tourism/recreation (Asterionellopsis glacialis [Castracane] Round, Anaulus australis Drebes & D. Schulz; in Villac & Noronha, 2008); mucilage production causing a condition known as “mare sporco” (or dirty sea) (Ceratoneis closterium Ehrenb., Pseudo-nitzschia pseudodelicatissima [Hasle] Hasle) as well as clogging of bivalve gills (Thalassiosira mala Takano) and fishing nets (Guinardia striata [Stolterfoth] Hasle, Coscinodiscus wailesii Gran & Angst); high biomass accumulations resulting in shading and depletion of oxygen/nutrients (C. wailesii) as well as clogging gills of benthic shellfish and bony fish (Cerataulina pelagica [Cleve] Hendey); and spines/setae inflicting physical damage to fish gills leading to major financial losses for aquaculture operations (Chaetoceros convolutus Castracane and Chaetoceros concavicornis Mangin).
To save this book to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.