scholarly journals Effects of marine reserves and urchin disease on southern Californian rocky reef communities

2004 ◽  
Vol 279 ◽  
pp. 129-139 ◽  
Author(s):  
MD Behrens ◽  
KD Lafferty
Keyword(s):  
Marine Reserves ◽  
Rocky Reef ◽  
Reef Communities

Cascading effects of fishing on Galapagos rocky reef communities

2007 ◽  
Vol 343 ◽  
pp. 77-85 ◽  
Author(s):  
JI Sonnenholzner ◽  
LB Ladah ◽  
KD Lafferty
Keyword(s):  
Rocky Reef ◽  
Cascading Effects ◽  
Reef Communities

scholarly journals Interactions between sea urchin grazing and prey diversity on temperate rocky reef communities

Ecology ◽  
2013 ◽  
Vol 94 (7) ◽  
pp. 1636-1646 ◽  
Author(s):  
Jarrett E. K. Byrnes ◽  
Bradley J. Cardinale ◽  
Daniel C. Reed
Keyword(s):  
Sea Urchin ◽  
Rocky Reef ◽  
Temperate Rocky Reef ◽  
Reef Communities ◽  
Prey Diversity ◽  
Urchin Grazing

Multi-scale spatial heterogeneity, habitat structure, and the effect of marine reserves on Western Mediterranean rocky reef fish assemblages

2004 ◽  
Vol 144 (1) ◽  
pp. 161-182 ◽  
Author(s):  
J. A. Garc�a-Charton ◽  
�. P�rez-Ruzafa ◽  
P. S�nchez-Jerez ◽  
J. T. Bayle-Sempere ◽  
O. Re�ones ◽  
...  
Keyword(s):  
Spatial Heterogeneity ◽  
Reef Fish ◽  
Habitat Structure ◽  
Fish Assemblages ◽  
Marine Reserves ◽  
Western Mediterranean ◽  
Rocky Reef ◽  
Multi Scale ◽  
Rocky Reef Fish

scholarly journals Evidence of the top–down role of predators in structuring sublittoral rocky-reef communities in a Marine Protected Area and nearby areas of the Canary Islands

2008 ◽  
Vol 66 (1) ◽  
pp. 64-71 ◽  
Author(s):  
Sabrina Clemente ◽  
José Carlos Hernández ◽  
Alberto Brito
Keyword(s):  
Canary Islands ◽  
Protected Area ◽  
Marine Protected Area ◽  
Rocky Reef ◽  
Adult Density ◽  
Top Down ◽  
El Hierro ◽  
Reef Communities ◽  
Predation Rates

Abstract Clemente, S., Hernández, J. C., and Brito, A. 2009. Evidence of the top–down role of predators in structuring sublittoral rocky-reef communities in a Marine Protected Area and nearby areas of the Canary Islands. – ICES Journal of Marine Science, 66: 64–71. Differences in the sea urchin Diadema aff. antillarum population structure, which have been attributed to removal of predatory fish through overfishing, are observed throughout the Canary Islands. Low urchin abundances and a “desired conservation state” are currently found in Mar de Las Calmas Marine Protected Area and nearby fished areas (FAs) in El Hierro Island, in contrast to the occurrence of high urchin densities and the “undesired conservation state” in the highly FAs (HFAs) of Tenerife Island. Under these different levels of fishing pressure, we consider a set of ecological variables potentially affecting urchin populations (settlement, recruitment, adult urchin densities, predation rates, and abundance of urchin fish predators) to infer their magnitude and relative importance in addressing community-wide changes. No differences in settlement and recruitment rates were found, but predation pressure was higher in El Hierro, where adult density was low and predation rates were high. The combination of these factors provides evidence of a top–down control of sublittoral reef communities. Although the effect of protection was less clear, we demonstrate the positive effects of reduced fishing effort in enhancing trophic cascade processes and reducing the establishment of barren grounds.

scholarly journals Using no-take marine reserves as a tool for evaluating rocky-reef fish resources in the western Mediterranean

2013 ◽  
Vol 70 (3) ◽  
pp. 578-590 ◽  
Author(s):  
Josep Coll ◽  
Antoni Garcia-Rubies ◽  
Gabriel Morey ◽  
Olga Reñones ◽  
Diego Álvarez-Berastegui ◽  
...  
Keyword(s):  
Reef Fish ◽  
Carrying Capacity ◽  
Spatial Scales ◽  
Marine Reserves ◽  
Conservation Status ◽  
Western Mediterranean ◽  
Habitat Characteristics ◽  
Rocky Reef ◽  
Fish Resources ◽  
Rocky Reef Fish

Abstract Coll, J., Garcia-Rubies, A., Morey, G., Reñones, O., Álvarez-Berastegui, D., Navarro, O., and Grau, A. M. 2013. Using no-take marine reserves as a tool for evaluating rocky-reef fish resources in the western Mediterranean). - ICES Journal of Marine Science, 70: 578–590. The use of MPAs to recover fish stocks in littoral areas of the western Mediterranean has made it possible to obtain time dataseries on the biomass evolution over the last decade. The biomass of six fully protected MPAs increased between two- and threefold over a period of five years. After this time the biomass remained stable. This pattern allowed us to adjust logistic curves between the biomass and protection time, and to estimate the carrying capacity (K) of each site. In the present study we investigate the relationships between carrying capacity (K) and habitat characteristics at each protected site. The relationships between habitat/environmental variables and K are analysed by applying generalized linear models. Environmental descriptors showing major effects on biomass are related to depth, exposure, rugosity, and offshore slope at different spatial scales. Comparison of observed and predicted values using the model for exploited sites in the Balearic Islands made it possible to determine their conservation status. This empirical approach to the relationships between environmental factors and fish assemblage biomass could constitute a very useful tool when traditional fishery management based on catch and effort data from the artisanal and recreational fleets is difficult to apply.

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