The Ecology of Tijuana Estuary, California: An Estuarine Profile

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Figure 39. invertebrates of the channels and tidal creeks tnclude, in the top row. California horn snail, sea spider (Ammothelfa biungurculata var. californica, male w~th eggs), white bubble snail (Harnrnoea vestcula); In the middle row, fire worm (Nephtys caecoides), spionid worm (Polydora sp.), hairy hermit crab (Pagurus hrrsutrusculus: and on the bottom row, broken back shrimp (Spirontocans palpalor), and amphipods (e.g., Jassa felcata) Mcinttre collection, copyright 1986 by Zedler. 43
changes in envlronment has not been fully examined The short-term tolerance of selected species to reduced salinity IS belng tested (D Kyle, SDSU, pers. comm), and ~t appears that adults of several spectes can survcve w~dely ranglng condttcons for at least 4 weeks Whether or not those same species could reproduce under the same conditions or survlve several months of altered saltn~ty IS not yet known The abcltty of Invertebrates to recover from extreme condttions is largely determtned by their l~fe history characteristics, but chance also plays a role Specces wlth large numbers of larvae present at the tfme when estuarrne habitats are accessible and suitable for settlcng w~li have the h~ghest probability for recru~tment The qual~tattve data for 1985 cndlcate that recruitment from ocean waters can occur rap~dly, once cond~tions become favorable, and that a variety of species can become established within one year. A benthic monitoring program will begin in 1986 to track future shifts in or stabilization of benthic community structure. 3.6.3 Fishes - Adults and Juveniles The distribution and abundance of the fishes that use the channel habitats of Tijuana Estuary have also been affected by the variable tidal regimes and climatic catastrophes. These disturbances affected the fishes directly by physiological stress and indirectly by elimination of food items. Before the 1978 flood. 29 species of fish were found in Tijuana Estuary (Table 9). The community Table! 9. Fishes and rays recorded from the Tijuana Estuary (Zedler et al. 1983b). Organlsrn 1 2 3 Unpubl 1-drvae Eggs Alk4tAINIOAT (Sllverstdes) Attrsrrr!oy>s aiftnis tupsrnt4t 1 324 119 xD Ac xd x RA I"C{ACHOlOIDAE (loadfishes) Portchthys inyrtesfer - specklellri rn~dsti~pman x U BLENNIUAF (Cornbtrjoth bltlr-irj~t?~) Wypsoblenrl~us genlilis bay blenriy 6 0 - 1 x C xd BOT MDAF (t-efteye fluundersi C~thartchff?yspp - siincldabs x Parcll~Cilfttys cahlurntctrs - Caltforr~ta halibut 8 0 7 x A x x C:I.UPFIDAt: {Neru~irqs) Serdinops saqax caeruloos - Pac~fic sardine x x CC37"7 IDAC (Sc:cilpnsi Arfsdrus harrifrqtr>rr~ - scaiyhead sculpin x L~pt~i(:offu~ arrncltus stacgllnrn scul~tn 11 12 14 x A x C:YNUGLUSSIDAE (I'onguef~st~es) Symnpltcj~us arr~cauda - Calrforn~a Iongueflsl~ x U CYPUINODCTNTl[IAE (Kiilll~shes) Furidulus parvtprnrrts - Calfarn~a k~li~fish 29 692 3 x A x DASYATlDlUAE (Sl~rigrays) Urolopus rrdlferi - roilrid st~ngray x U f :dB:OTrSCtDAt !Surfpcrckcs! Amph~sttchus argenteus - barred .- *- surfperch 32 C ., 30 x U Cymatogaster aggregata - shrner perch x U Hyper~rosopon arqenteum - walleys surfperch x U (cO'111~:uoCII 44
Page 1 and 2:
June 1986 I THE ECOLOGY OF TIJUANA
Page 3 and 4: The findings in this report are not
Page 5 and 6: CONVERSION TABLE Metric to U.S. Cus
Page 7 and 8: Page 4.5 Energy Flow ..............
Page 9 and 10: Number Page The channel fish cornrn
Page 11 and 12: ACKNOWLEDGMENTS The California Sea
Page 13 and 14: Figure 1. Lacatlcrn of 71juana Estu
Page 15 and 16: Figure 3. Map6 of Tijuana Estuary s
Page 17 and 18: FI(I(uPc$ 4. Wei&rahOt@ patt@rns of
Page 19 and 20: also limitrng Hot, dry desert winds
Page 21 and 22: 2.3 LAND USE HlSPQWV Through exami!
Page 23 and 24: The nearby bridge remained, and ext
Page 25 and 26: flushing until mid-December 1984. E
Page 27 and 28: with seawater. Even in years with s
Page 29 and 30: flats ~n winter but not in midsumme
Page 31 and 32: Each "island" of higher topography
Page 33 and 34: The vegetation and soils of the upp
Page 35 and 36: populations (Massey 1979) The brrds
Page 37 and 38: c~n~entrations of insects, especial
Page 39 and 40: Frgufe 29. The Ifght-footed clapper
Page 41 and 42: Figure 30. During winter (above) th
Page 43 and 44: anlmal footprints, In the hardpan f
Page 45 and 46: Tijuana Estuary salt marsh Such exp
Page 47 and 48: Frgura 36 The etraracrel an& tidal
Page 49 and 50: ^_ _I __"___I _-a_. -- fable 7. Inv
Page 51 and 52: Pre- 1980 (excluding Hosrner Rehse
Page 53: Table 8. Average density (number/m2
Page 57 and 58: was dominated by goby species, Cali
Page 59 and 60: compared the ,chthyoplankton commun
Page 61 and 62: Figure 43, Birds of the intertidal
Page 63 and 64: -" and that the community was compo
Page 65 and 66: Willet (1 73) i - Water Depth (cm)
Page 67 and 68: Table 14. Early information on dune
Page 69 and 70: Figure 48. Birds that nest on the s
Page 71 and 72: CHAPTER 4 ECOSYSTEM FldNCTlONlNG St
Page 73 and 74: were no? irght-saturated untri expo
Page 75 and 76: Table 17. Conceptual model of chann
Page 77 and 78: Table 19. Net aboveground productiv
Page 79 and 80: _I___ I__-~--- 4.4.1 Nitragen Fluxe
Page 81 and 82: i i t 1 1 I Table 22. Standing crop
Page 83 and 84: calculated from chlorophyll a measu
Page 85 and 86: Dissolved Organic Biomass Carbon De
Page 87 and 88: CHAPTER 5 THE ROLE OF DISTURBANCES
Page 89 and 90: Table 25. Changes in elevation in t
Page 91 and 92: Table 26. Change in pickleweed cano
Page 93 and 94: Table 27. Occurrence (in circular 0
Page 95 and 96: perennials can survive long periods
Page 97 and 98: An experiment was designed to deter
Page 99 and 100: CHAPTER 6 MANAGEMENT CONSIDERATIONS
Page 101 and 102: Closely associated with the researc
Page 103 and 104: c. Dredging at Tijuana Estuary will
Page 105 and 106:
Table 30. Predicted impacts of redu
Page 107 and 108:
footed clapper rails; the picklewee
Page 109 and 110:
overwashas, and slabiiizatran rs rl
Page 112 and 113:
REFERENCES Allen, L.G. 1980. Struct
Page 114 and 115:
Minsky, D. 1984. California least t
Page 116:
30272 -101 REPORT WUMENTATION 1. RE
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The Ecology of Tijuana Estuary, California: An Estuarine Profile

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