‘Ghost nutrients’ from fish farms are transferred up the food web by phytoplankton grazers
نویسندگان
چکیده
منابع مشابه
Toxic marine phytoplankton, zooplankton grazers, and pelagic food webs
Interactions between toxic phytoplankton and their zooplankton grazers are complex. Some zooplanktcrs ingest some toxic phytoplankters with no apparent harm, whereas others are deleteriously affected. Phycotoxins vary in their modes of action, levels of toxicity and solubility, and affect grazers in different ways. Beyond effects on direct grazers, toxins may accumulate in and be transfcrrcd th...
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We examined the separate and interactive effects of light, nutrients, and zooplanktivorous fish on phytoplankton nutrient stoichiometry, taxonomic richness, community composition, and the associations among these variables. We manipulated light supply, nutrient supply, and zooplanktivorous fish (presence or absence), in a factorial design using mesocosms containing regional phytoplankton and zo...
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T Sacramento–San Joaquin River Delta is a complex mosaic of waterways that forms the transition zone between San Francisco Bay and its watershed (fig. 1). Over the last century, the original dominant marsh habitat has been lost through filling and diking. Water flows have changed radically. Exotic plants and animals have invaded or been introduced intentionally, and toxic contaminants have beco...
متن کاملEnhancement of marine phytoplankton blooms by appendicularian grazers
Short-lived blooms of large phytoplankton are the main vector in the atmosphere–ocean–sediment carbon flux and are associated with high fish production. A common assumption is that grazing zooplankton can only have a negative effect on the growth of these blooms. We have found that appendicularians, the most abundant microphagous metazoans, strongly stimulate the magnitude of experimentally ind...
متن کاملEffects of nutrients, planktivorous fish and water column depth on components of the microbial food web
An experimental study was conducted uslng large enclosures to examine the effects of nutrients, presence of planktivorous fish, and depth of the water colun~n on the components of the microbial food web. Enclosures (8 m in diameter) were installed, open to the sediments, at both 3.5 and 11 nl depths in Lac Croche, a small oligotrophic lake on the Canadian Shield The abundance of protozoans, inc...
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ژورنال
عنوان ژورنال: Marine Ecology Progress Series
سال: 2009
ISSN: 0171-8630,1616-1599
DOI: 10.3354/meps07763