The size ratio between planktonic predators and their prey

Hansen, Benni Winding; Bjørnsen, Peter Koefoed; Hansen, Per Juel

doi:10.4319/lo.1994.39.2.0395

Cited by 717 publications

(617 citation statements)

References 49 publications

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“…This may be true because of the scaledependent relationship between plankton abundance and cell body size that exists in most natural food webs (e.g. Lindeman 1942;Hansen et al 1994).…”

Section: Discussionmentioning

confidence: 99%

Have we overlooked the importance of small phytoplankton in productive waters?

Carrick

Schelske

1997

Limnology & Oceanography

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The idea that phytoplankton size structure increases with elevated nutrient content in lakes may be inaccurate because phototrophic picoplankton (Ppico) abundance was not accounted for in studies that originally described this phenomenon. The biomass, composition, and production of an entire phytoplankton community was evaluated in hypereutrophic Lake Apopka, Florida (avg chlorophyll = 105 pg liter-', y1 = 20) for 1 yr. Ppico cell abundances commonly exceed 10' cells ml -I, and size-fractionated chlorophyll (<5 pm) and algal enumeration (cells <2 pm in size) indicate that pica-size cyanobacteria contribute significantly to phytoplankton biomass throughout the year (avg 30%, n = 15), even though clogging of small pore-sized filters used in chlorophyll fractionation studies led to underestimation of Ppico biomass estimates. Ppico production contributed nearly 30% (n = 8) to total phytoplankton production. The quantitative importance of Ppico in Lake Apopka and eight other hypereutrophic systems in Florida (avg 50% Chl <5 pm) indicates that Ppico can be important in waters of high nutrient content. The importance of small phytoplankton in productive waters may have been overlooked because (1) most studies focus on relatively pristine ecosystems, (2) some methodological constraints may impede studies in eutrophic environments (filtration artifacts), and (3) routine assessment of phytoplankton abundance rarely censuses all components of the community, including small algae.

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“…This may be true because of the scaledependent relationship between plankton abundance and cell body size that exists in most natural food webs (e.g. Lindeman 1942;Hansen et al 1994).…”

Section: Discussionmentioning

confidence: 99%

Have we overlooked the importance of small phytoplankton in productive waters?

Carrick

Schelske

1997

Limnology & Oceanography

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“…Passive selection is partly based on prey size, and as such, our results would suggest nanoeukaryotes are of optimum size to be captured and ingested by the bivalve larvae. However, observations on meroplankton larvae with double cilia bands, such as bivalve larvae, suggest that these meroplankton have a predator/prey size ratio ranging between 30:1 and 125:1 (Hansen et al 1994). For the bivalve larvae, in our study, this would equate to a preferred prey size of 2.8-12 µm.…”

Section: Discussionmentioning

confidence: 89%

“…The carbon content of each ciliate was determined using the carbon to volume conversion equations of Putt and Stoecker (1989). Diatoms were not enumerated in this study because they were very low in abundance and the few that were present were assumed too large to be ingested by the bivalve larvae (Hansen et al 1994). Dinoflagellates were not counted as a separate group, but those <20 µm were included in the nanoeukaryote fraction of the flow cytometry analysis.…”

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confidence: 99%

Feeding selectivity of bivalve larvae on natural plankton assemblages in the Western English Channel

et al. 2014

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“…These particles were similar in size to numerous species of zooplankton and some phytoplankton (Spurles et al 1988, Hansen et al 1994 and thus may be confused for planktonic food. Microplastics are ingested by species in a variety of trophic levels, habitats, and feeding modes.…”

Section: Potential Implications Of Microplastic Pollutionmentioning

confidence: 99%

Biological Erosion of Marine Habitats and Structures by Burrowing Crustaceans

Davidson¹

2000

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Marine bioeroders, borers, and burrowers can have drastic effects to marine habitats and facilities. By physically altering the structure of marine habitats, these organisms may elicit ecosystem-level effects that cascade through the community. While borer damage is typically restricted to a few substratum types, burrowing isopods in the genus Sphaeroma attack a diversity of substrata in tropical and temperate systems. My dissertation examined how boring sphaeromatid isopods affect coastal habitats (saltmarshes, mangroves) and other estuarine substrata as well as marine structures. I used a combination of lab and mensurative field experiments to quantify the effects of boring by isopods and examine how select factors affect the colonization, hence burrowing damage by isopods. I explored these questions primarily using the temperate To examine the small-scale factors that mediate colonization and boring, I conducted a series of binary choice experiments. I found the presence of conspecifics, biofilm, and shade were important factors influencing colonization. These small scale factors likely explain why isopod attack is focused in some substrata. Finally, to examine the boring effects of tropical isopods in mangroves, I examined the associations between burrowing by S. terebrans and mangrove performance and fecundity. I found negative relationships between boring effects and performance and fecundity in two mangrove species in a restored mangrove stand in Taiwan. Together, these studies elucidate the effects of bioerosive isopods on saltmarshes, mangroves, and marine structures. However, the similar mechanisms involved in bioerosion in other boring species suggest that these results can be used to infer similar effects of other borers. In addition, since many species of sphaeromatid isopods have been introduced, this research shows how the effects of a non-native bioeroder can damage marine facilities and degrade and alter marine habitats.Through biological erosion and thus changing the physical structure of a marine habitat these non-native species can have ecosystem-level effects that cascade throughout the local community.iii Acknowledgements

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The size ratio between planktonic predators and their prey

Cited by 717 publications

References 49 publications

Have we overlooked the importance of small phytoplankton in productive waters?

Have we overlooked the importance of small phytoplankton in productive waters?

Feeding selectivity of bivalve larvae on natural plankton assemblages in the Western English Channel

Biological Erosion of Marine Habitats and Structures by Burrowing Crustaceans

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