2008 Annual Monitoring Report (pdf 10.9MB) - Bolsa Chica ...

Bolsa Chica Lowlands Restoration Monitoring
2008 Annual Report
Table 1-14. Mean biomass of infauna (g/m 2 ) in January 2008.
-2-feet NAVD
+1-foot NAVD
Phylum Taxa Station 1 Station 2 Station 3 Station 1 Station 2 Station 3
Annelida Class Polychaeta 6.582 12.766 19.480 1.203 17.616 1.863
Arthropoda Class Ostracoda 0.024
Order Amphipoda 1.292 0.102 0.887 0.041 0.077
Order Decapoda 2.637 10.938 0.017
Order Mysidacea 0.011
Order Tanaidacea 0.358 0.004 0.422 0.038 0.113
Cnidaria Class Anthozoa 0.661 5.808 0.160 0.571
Echinodermata Class Holothuroidea 0.051 12.810 0.085 0.041
Subclass Ophiuroidea 0.013 0.000
Foraminifera Phylum Foraminifera 0.117
Mollusca Class Bivalvia 54.750 2.145 8.554 10.100 17.599
Class Gastropoda 1.183 5.508 2.949 88.497
Nemertea Phylum Nemertea 0.000 0.763 0.011 0.226 4.040 1.770
Phoronida Phylum Phoronida 0.239 0.260 0.038
Platyhelminthes Class Turbellaria 0.026 0.030 0.117
Total Mean Biomass all Taxa (g/m 2 ) 67.787 40.205 32.418 22.706 128.635 3.840
In July 2008, eight phyla were collected from the infauna cores, with amphipods making up 36% of the
total individuals captured, and tanaids making up 27% (Table 1-15). Tanaids and amphipods were
particularly abundant at the +1-foot elevation of Station 3.
Table 1-15. Mean density of infauna (individuals/m 2 ) in July 2008.
-2-feet NAVD
+1-foot NAVD
Phylum Taxa Station 1 Station 2 Station 3 Station 1 Station 2 Station 3
Annelida Class Polychaeta 621 1,582 1,488 320 1,789 3,333
Arthropoda Order Amphipoda 1,205 395 1,563 94 885 7,533
Order Decapoda 19 38 19
Order Isopoda 19
Order Mysidacea 38
Order Tanaidacea 38 169 791 19 19 8,927
Echinodermata Class Holothuroidea 19 151 132
Subclass Ophiuroidea 56
Mollusca Class Bivalvia 339 282 339 395 339 94
Class Gastropoda 433 132 358 678 377 640
Nematoda Phylum Nematoda 38
Nemertea Phylum Nemertea 38 169 38 38 245 0
Phoronida Phylum Phoronida 132 94 19 113 56
Platyhelminthes Class Turbellaria 19 94
Total Mean Density all Taxa (individuals/m 2 ) 2,900 2,976 4,746 1,130 3,823 20,734
Merkel & Associates, Inc. 59