Ecological Archives M076-005-A4

Luis R. Vinueza, George M. Branch, Margo L. Branch, and Rodrigo H. Bustamante. Year. Top-down herbivory and bottom-up El Niño effects on Galápagos rocky-shore communities. Ecological Monographs VOL: pp-pp.

Appendix D (Table D1). Relative abundance of slow moving invertebrates (no. individuals/m2) at two study sites in Academy Bay, Santa Cruz Island, based on a survey in the high, mid and low-shore zones in June 2002.  Mean ± 95% CI are shown for Sites 1 and 2; n = 10 quadrats per shore height.

Trophic status/Taxon

High

Mid

Low

 

Site1

Site 2

Site1

Site 2

Site 1

Site 2

Herbivorous gastropods

           

Cerithium adustum

       

0.2±0.4

0.2±0.4

Cerithium stercusmuscarum

 

0.2±0.4

 

0.2±0.4

   

Chiton sulcatus, C. goodallii

 

0.2±0.4

0.2±0.4

0.2±0.4

   

Fissurella sp.

     

0.2±0.4

 

0.2±0.4

Hoffmannola lesliei

0.8±1.6

         

Nerita funiculate

 

0.2±0.4

       

Nodilittorina galapagiensis

3.8±2.5

         

Herbivorous echinoids

           

Echinometra vanbrunti

       

0.2±0.4

0.2±0.4

Eucidaris thouarsii

       

0.2±0.4

 

Carnivorous gastropods

           

Leucozonia tuberculata

     

0.6±0.8

   

Mitra tristis

     

0.4±0.8

   

Plicopurpura patula pansa

0.4±0.5

0.6±1.2

0.8±1.1

3.0±3.3

0.4±0.5

 

Thais brevidentata

     

1.8±1.1

0.4±0.5

 

Vasula melonis

   

1.6±1.5

0.6±0.5

8.2±0.7

3.2±2.4

Thais planospira

         

0.2±0.4

Carnivorous crabs

           

Eriphides hispida

   

0.8±0.7

0.2±0.4

0.6±0.8

0.8±0.7

Geograpsus lividus

0.2±0.4

0.2±0.4

       

Mithrax nodosus

     

0.2±0.4

0.2±0.4

0.2±0.4

Ozius verreauxii

0.2±0.4

0.2±0.4

       

Omnivorous hermit crab

           

Calcinus explorator

0.2±0.4

 

0.4±0.8

1.8±1.7

4.4±2.3

1.6±3.1

Particle feeding holothurians

           

Holothuria kefersteini

       

0.2±0.4

0.6±1.2

Holothuria portovallartensis

   

0.2±0.4

0.6±0.8

0.6±0.8

 

Holothuria theeli

 

0.4±0.8

1.0±0.9

0.4±0.8

 

0.4±0.5



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