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

Bolsa Chica Lowlands Restoration Monitoring
2008 Annual Report
Table 1-16 presents the mean biomass (g/m 2 ) of infauna for the three replicates at each station and
elevation in July. Infauna biomass in July was dominated by bivalves, due to the collection of large
individuals at both elevations.
Table 1-16. Mean biomass of infauna (g/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 4.962 32.567 13.017 0.386 24.305 2.674
Arthropoda Order Amphipoda 1.079 0.205 0.955 0.196 0.377 5.571
Order Decapoda 0.895 1.678 0.006
Order Isopoda 0.006
Order Mysidacea 0.194
Order Tanaidacea 0.002 0.036 0.043 0.002 0.002 1.109
Echinodermata Class Holothuroidea 0.186 0.527 1.951
Subclass Ophiuroidea 8.633
Mollusca Class Bivalvia 26.753 7.162 187.476 190.286 0.047 2.217
Class Gastropoda 0.670 2.085 1.228 12.309 20.976 2.710
Nematoda Phylum Nematoda 0.188
Nemertea Phylum Nemertea 0.207 0.375 0.098 0.363 0.367 0.000
Phoronida Phylum Phoronida 1.220 0.100 0.075 0.079 0.284
Platyhelminthes Class Turbellaria 0.036 0.104
Total Mean Biomass all Taxa (g/m 2 ) 44.608 43.056 204.879 205.220 46.352 14.863
Figure 1-12 presents a summary comparison between the January and July density and biomass of all
taxa combined, by station and tidal elevation. There was high variability between all parameters with
no clear seasonal differences or trends between stations or elevations.
Merkel & Associates, Inc. 60