<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Hanson, J. M.</style></author><author><style face="normal" font="default" size="100%">Prepas, E. E.</style></author><author><style face="normal" font="default" size="100%">Mackay, W.C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Size distribution of the macroinvertebrate community in a freshwater lake</style></title></titles><dates><year><style  face="normal" font="default" size="100%">1989</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.nrcresearchpress.com/doi/abs/10.1139/f89-193#.VRMI7Vz4sxI</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Canadian Journal of Fisheries and Aquatic Sciences</style></publisher><volume><style face="normal" font="default" size="100%">46</style></volume><pages><style face="normal" font="default" size="100%">1510-1519</style></pages><language><style face="normal" font="default" size="100%">en</style></language><abstract><style face="normal" font="default" size="100%">Macroinvertebrates were collected every 2 wk for 18 wk from three depth zones in a deep lake in Alberta. Unionid clams comprised 80% of the total macroinvertebrate biomass and were excluded from initial analyses. The seasonal average size-spectrum for the littoral zone community was bimodal with peaks in the 8–16 and 256–512 mg weight-classes; size-spectra for the sublittoral and profundal communities were unimodal with peaks in the 8–16 and 16–32 mg weight-classes, respectively. Slopes of the normalized size-spectra for the littoral, sublittoral, profundal and whole-lake communities were not significantly different from −1.0, −1.0, 0.0, and −1.0, respectively. These results suggest that biomass is evenly distributed across logarithmically even size-classes for the average macroinvertebrate community in the littoral zone, sublittoral zone, and on a whole-lake basis. The biomass peak for unionids (16.4–32.8 g weight-class) was 10–30 times greater than biomass peaks for the remaining macroinvertebrates. The slopes of normalized size-spectra for the littoral zone and whole-lake were changed significantly when unionids were included; however, unionids presumably play a minor role in the macroinvertebrate community because they are an energy sink in the present context. Despite wide seasonal variation, average normalized size-spectra based on samples collected at 4- and 6-wk intervals were very similar to those based on nine biweekly collections.</style></abstract><custom1><style face="normal" font="default" size="100%">Biology</style></custom1><custom2><style face="normal" font="default" size="100%">Narrow Lake</style></custom2><custom4><style face="normal" font="default" size="100%">Science</style></custom4><custom5><style face="normal" font="default" size="100%">54 35 N 113 37 W</style></custom5></record></records></xml>