Activity and Prey Election in the Sea Otter: Influence of Population Status on Community Structure

1982 ◽  
Vol 120 (2) ◽  
pp. 242-258 ◽  
Author(s):  
James A. Estes ◽  
Ronald J. Jameson ◽  
Elaine B. Rhode
Keyword(s):  
Community Structure ◽  
Sea Otter ◽  
Population Status

scholarly journals Southern (California) sea otter population status and trends at San Nicolas Island, 2017–2020

2020 ◽  
Author(s):  
Julie L. Yee ◽  
Joseph A. Tomoleoni ◽  
Michael C. Kenner ◽  
Jessica Fujii ◽  
Gena B. Bentall ◽  
...  
Keyword(s):  
Southern California ◽  
Sea Otter ◽  
Population Status ◽  
San Nicolas Island ◽  
Status And Trends

scholarly journals Kelp Forests versus Urchin Barrens: Alternate Stable States and Their Effect on Sea Otter Prey Quality in the Aleutian Islands

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Nathan L. Stewart ◽  
Brenda Konar
Keyword(s):  
Energy Density ◽  
Potential Energy ◽  
Population Decline ◽  
Kelp Forest ◽  
Kelp Forests ◽  
Sea Otter ◽  
Population Status ◽  
Stable States ◽  
Alternate Stable States ◽  
Prey Quality

Macroalgal and urchin barren communities are alternately stable and persist in the Aleutians due to sea otter presence and absence. In the early 1990s a rapid otter population decline released urchins from predation and caused a shift to the urchin-dominated state. Despite increases in urchin abundance, otter numbers continued to decline. Although debated, prey quality changes have been implicated in current otter population status. This study examined otter prey abundance, size, biomass, and potential energy density in remnant kelp forest and urchin-dominated communities to determine if alternate stable states affect prey quality. Findings suggest that although urchin barrens provide more abundant urchin prey, individual urchins are smaller and provide lower biomass and potential energy density compared to kelp forests. Shifts to urchin barrens do affect prey quality but changes are likely compensated by increased prey densities and are insufficient in explaining current otter population status in the Aleutians.

scholarly journals Exploitation of rocky intertidal grazers: population status and potential impacts on community structure and functioning

2008 ◽  
Vol 3 ◽  
pp. 1-10 ◽  
Author(s):  
GM Martins ◽  
SR Jenkins ◽  
SJ Hawkins ◽  
AI Neto ◽  
RC Thompson
Keyword(s):  
Community Structure ◽  
Rocky Intertidal ◽  
Population Status

scholarly journals Changes in Subtidal Community Structure Associated with British Columbia Sea Otter Transplants

1982 ◽  
Vol 7 ◽  
pp. 13-20 ◽  
Author(s):  
PA Breen ◽  
TA Carson ◽  
JB Foster ◽  
EA Stewart
Keyword(s):  
British Columbia ◽  
Community Structure ◽  
Sea Otter

scholarly journals Sea otter population status and the process of recovery from the 1989 'Exxon Valdez' oil spill

2002 ◽  
Vol 241 ◽  
pp. 237-253 ◽  
Author(s):  
JL Bodkin ◽  
BE Ballachey ◽  
TA Dean ◽  
AK Fukuyama ◽  
SC Jewett ◽  
...  
Keyword(s):  
Oil Spill ◽  
Sea Otter ◽  
Population Status ◽  
Exxon Valdez ◽  
Exxon Valdez Oil Spill

STRUKTUR KOMUNITAS MAKRO ALGA DI PESISIR PULAU KECAMATAN BULANG

SIMBIOSA ◽  
2014 ◽  
Vol 3 (2) ◽  
Author(s):  
Notowinarto Notowinarto ◽  
Ramses Ramses ◽  
Mulhairi Mulhairi
Keyword(s):  
Community Structure ◽  
Diversity Index ◽  
Algal Species ◽  
Algal Communities ◽  
Marine Life ◽  
Ph Values ◽  
Abundance Patterns ◽  
Coastal Marine ◽  
Temperature Parameter ◽  
Important Value Index

Bulang districts Batam Islands of  Riau province (Riau Islands), its consists of many islands with as well as having the potential diversity of coastal marine life in particular kinds of macro algae or seaweed. Conducted research aimed to determine the structure of macro- algal communities in the intertidal zone islands. The results of the identification of algal species found 16 species are: the Order of Chlorophyceae as 6 spesies; Order Phaeophyceae as 2 spesies; and Order Rhodophyceae as 8 spesies. The community structure at the five stations showed the highest values were found in the island of dominance Cicir (D ' = 0.79) , uniformity index values on Tengah Island (E ' = 0.99) , while the island Balak had the highest diversity index (H ' = 0.88) , with the abundance patterns of population structure on the island is pretty good Central . Results of correlation analysis of regression between IVI types of algae with the conditions of environmental quality suggests that there is a significance (Fhit ˃ F table and the value of r = > 90 %) between IVI algae Halimeda sp and Cryptarachne polyglandulosa at each station with a temperature parameter surface (⁰C) , depth temperature (⁰C) and pH values. Keywords : Algae, Community Structure, Important Value Index.

Seasonal changes in phytoplankton community structure in a bioluminescent lagoon, St. Croix, US Virgin Islands

2018 ◽  
Vol 81 (2) ◽  
pp. 109-124 ◽  
Author(s):  
JL Pinckney ◽  
C Tomas ◽  
DI Greenfield ◽  
K Reale-Munroe ◽  
B Castillo ◽  
...  
Keyword(s):  
Community Structure ◽  
Seasonal Changes ◽  
Phytoplankton Community ◽  
Virgin Islands ◽  
Phytoplankton Community Structure ◽  
Us Virgin Islands
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