California Coastal National Monument

Site Characterization

Table of Contents

I.  INTRODUCTION ................................................................................................ 3

The Offshore Rocks.................................................................................... 3

Description of Habitat................................................................................ 3

General Management Considerations........................................................ 4

Fishing........................................................................................................ 4

Recreational Kayaking and Scuba Diving.................................................... 5

Seaweed collecting..................................................................................... 5

Management recommendations to reduce direct human disturbances....... 5

Invasive Species......................................................................................... 6

Plants.......................................................................................................... 6

Canada Geese............................................................................................. 6

Mammals...................................................................................................... 6

Interaction with other native species........................................................... 6

Management recommendations to reduceimpacts from invasive species..... 6

Oil spills........................................................................................................ 7

Data Gaps..................................................................................................... 7

II.  SEABIRD SPECIES ACCOUNTS ............................................................................ 8

Leach’s Storm-Petrel..................................................................................... 8

Ashy Storm-Petrel........................................................................................ 10

Black Storm-Petrel........................................................................................ 12

Fork-tailed Storm-Petrel............................................................................... 14

Brown Pelican............................................................................................... 17

Double-crested Cormorant........................................................................... 20

Pelagic Cormorant........................................................................................ 22

Brandt’s Cormorant...................................................................................... 25

Snowy Egret................................................................................................. 28

Black-crowned Night-Heron.......................................................................... 29

Peregrine Falcon........................................................................................... 30

Black Oystercatcher...................................................................................... 32

Western Gull................................................................................................. 35

Common Murre.............................................................................................. 38

Pigeon Guillemot............................................................................................ 42

Xantus’s Murrelet........................................................................................... 45

Cassin’s Auklet............................................................................................... 48

Rhinoceros Auklet........................................................................................... 51

Tufted Puffin................................................................................................... 55

Literature Cited – Seabirds............................................................................ 58

III.  MARINE MAMMAL SPECIES ACCOUNTS ................................................................ 64

Northern Fur Seal........................................................................................... 64

Steller Sea Lion.............................................................................................. 66

California Sea Lion......................................................................................... 69

Harbor Seal.................................................................................................... 71

Northern Elephant Seal.................................................................................. 73

Sea Otter........................................................................................................ 75

Literature Cited – Marine Mammals................................................................ 78

 


 

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