Food web structure

Lehman, J. T. (1988). Hypolimnetic metabolism in Lake Washington Relative effects of nutrient load and food web structure on lake productivity. Limnol. Oceanogr. 33,1334-1347. 

Futter, M.N. 1994. Pelagic food-web structure influences probability of mercury contamination in lake trout (,Salvelinus namaycush). Sci. Total Environ. 145 7-12. 

Fritz P, Basharmel GM, Drimmie RJ, Ibsen J, Qureshi RM (1989) Oxygen isotope exchange between sulphate and water during bacterial reduction of sulphate. Chem Geol 79 99-105 Fry B (1988) Food web structure on Georges Bank from stable C, N and S isotopic compositions. Limnol Oceanogr 3 1182-1190... 

In the preceding discussions, we assumed labile DOC and DON to be produced at rates y/c and y/N, respectively, without discussing their sources and how the production rate and the composition of the produced material would be expected to vary with food web structure. The important differences among different models can be illustrated by some examples. One potential model is that DOC production is an overflow mechanism occurring in mineral-nutrient-limited phytoplankton not able to use the photo-synthetically produced organic carbon for biomass production due to lack... 

FIGURE 4 Integrated model for bacterial production illustrating qualitatively the suggested proportionality with the square of total plankton biomass for C-limited bacteria, and proportionality with the square of ciliate biomass for mineral-nutrient-limited bacteria. In this model, C-limited growth occurs for food web structures with a high ciliate total plankton biomass. 

FIGURE 1 Detrital structure and primary fluxes of dissolved organic carbon in lake ecosystems with the food-web structure of predominantly pelagic components (box) that reflects the importance of the microbiota, the microbial loop, and physical processes by which most other organic matter inputs are metabolized heterotrophically or degraded by physical processes. DOM denotes dissolved organic matter, with labile (LDOM) and recalcitrant (RDOM) components POM denotes particulate organic matter. 

Sandberg, J., Andersson, A., Johansson, S., and Wikner, J. (2004) Pelagic food web structure and carbon budget in the northern Baltic Sea potential importance of terrigenous carbon. Mar. Ecol. Prog. Ser. 268, 13-29. 

Fig. 1 A diorama of a Phaeocystis ecosystem, in which physical, chemical, geological, and biological components interact to varying degrees to influence food web structure, biogeochemical flows, and ecosystem function. For simplicity, only well-documented components are illustrated. Current extent of our knowledge base is qualitatively related to font size. Arrow magnitude and direction indicate major known flows increasingly smaller and more numerous arrows imply unknown connections, the importance of indirect flows among ecosystem compartments, and overall system complexity...

Ecosystem structure The composition of the biological community in an ecosystem and the interrelationships between the individual populations of species (e.g., food web structure). 

McCleUand, J. W., and Vahela, I. (1998a). Changes in food web structure under the influence of increased anthropogenic nitrogen inputs to estuaries. Mar. Ecol. Prog. Ser. 168, 259—271. 

R. Rae, W.F. Vincent (1998). Effects of temperature and ultraviolet radiation on microbial food web structure potential responses to global change. Freshwat. Biol, 40, 747-758. 

It is obvious that while the total PP is quantitatively similar during the NEM and SWM, the quality of production and the food web structure should be very different during the two seasons. Naqvi etal. (2002) argued that a deficiency of Si044- relative to NO/ (reflecting the concentrations of these nutrients at the... 

Petipa, T.S., Pavlova, E.V. and Mironov, G.N., 1970. The food web structure, utilization and transport of energy by trophic levels in the planktonic communities. In J.H. Steele (Editor), Marine Food Chains. Oliver and Boyd, Edinburgh, pp. 142—167. 

Fry B. (1988) Food web structure on Georges Bank from stable C, N, S isotopic compositions. Umnol. Oceanogr. 33, 1182 1190. 

Prance RE. Omnivory, vertical food-web structure and system productivity Stable isotope analysis of freshwater planktonic food webs. Freshwater Biol 2012 57(4) 787-94. 

Petchey OW, Beckerman AP, Riede JO, Warren PH (2008) Size, foraging, and food web structure. Proc Natl Acad Sci U S A 105 4191 196... 

The other animals found around active hydrothermal vents, such as amphipods, copepods, snails, shrimps, crabs, sea urchins, sponges, and fishes, are the secondary species categorized as the chemosynthesis-affected ecosystem on the organic carbonate creation with the chemosynthetic members (http //www. pmel.noaa.gov/vents/nemo/explorer/concepts/chemosynthesis.html). The food web structure around hydrothermal vent is illustrated in Fig. 17.10 and is compared with the one in normal benthos. Because of additional primary production from the chemosynthesis, the biomass around the hydrothermal vent is quite richer than the one in normal benthos. 

Fig. 17.10 Comparison of food web structures around hydrothermal vent left) and in normal benthos right)...

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