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Table 1. Densities (#/m2) and 95% confidence intervals of benthic invertebrates from control treatments. <br />N <br />0 <br />TAXON WEEK 1 WEEK 2 WEEK 3 WEEK 5 WEEK 7 WEEK 10 <br />Nematoda 140670± 18390 63034± 19911 211287 ±37057 221693 ±37333 154744 ±48119 214356 ±30765 <br />Oligochaeta 3245 ±1341 10124± 7190 30053 ±6914 31005± 8089 33862± 9679 44903± 7259 <br />Gastrotricha 3647± 1438 3527± 2717 41623 ±14933 57072 ±14862 40212 ±15556 36931 ±11269 <br />Chironomidae 7824± 1486 7587 t1618 13810 ±3070 12448 ±2150 20459 ±8988 15168 ±3249 <br />Chironominae 3150 ±781 2233 ±1072 5291 ±1798 4603 ±1597 8818± 3298 8229± 1825 <br />Chironomini 2772± 781 2116 t 1079 3411± 989 4483 ±1583 8113 t 1991 7524 ±1804 <br />Chimnomus 2709± 788 2116 t 1079 3411 t 98^ 3407 ±947 7760± 1860 5175 ±1583 <br />Tanipodinae 4282 ±1189 5291 ±1867 8053 ±2302 6755 t 1556 7524 t 2731 6349 ±2447 <br />Tanypus 2772± 892 2353± 1161 1411 t 597 3707 ±1258 5407± 2475 5760 ±1950 <br />Adult Copepoda 2279± 719 1580 t 1002 4688 ±1473 8215 ±1763 10466 ±3291 12935 ±3637 <br />E. speratus 1875± 595 1337 ±933 3873 ±1341 6385 ±1749 8818± 3263 10582± 3153 <br />E. prionophorus 223 ±288 243 ±331 559 t 281 1680 ±516 823 ±636 2353 ±1106 <br />` Copepodite stages 6423 ±1811 11312 ±4093 24691 ±5102 32243 ±6554 51958 ±11822 53968 ±13689 <br />Naupliar stages 20434± 6768 33933± 8780 53968± 9195 132769 ±16731 163316 ±31872 162504 ±19358 <br />Cladocera 4377± 1445 3661 ±1604 3570 ±1161 3111 t 774 2353 ±1113 6586 ±1922 <br />1. sordidus 2998± 1196 4134± 2503 2963 ±1113 3065 t 2178 1704 ±740 4571 ±1874 <br />U laticomis 176± 169 243 ±331 436 ±282 798 ±395 122 ±239 2222 ±913 <br />Ceratopogonidae 203 ±261 466 ±560 860 ±442 207 ±212 117 ±230 1295±1217 <br />Rotifera 3002 ±1037 6155 ±3650 10540 ±2662 12533 ±2897 9640± 3809 20459 ±8919