Fishery-induced reductions in density and size truncation of sea urchin Loxechinus albus affects diversity and species composition in benthic communities

2019 ◽  
Vol 219 ◽  
pp. 409-419 ◽  
Author(s):  
Catalina Contreras ◽  
Edwin Niklitschek ◽  
Carlos Molinet ◽  
Patricio Díaz ◽  
Manuel Díaz
2005 ◽  
Vol 48 (6) ◽  
pp. 951-965 ◽  
Author(s):  
André Breves-Ramos ◽  
Helena Passeri Lavrado ◽  
Andrea de Oliveira Ribeiro Junqueira ◽  
Sérgio Henrique Gonçalves da Silva

The aim of this study was to describe and compare the succession of intertidal benthic communities in two areas at Guanabara Bay, RJ, Brazil: Urca, an area submitted to moderated organic pollution and Catalão, an extremely polluted area. Three transects in each area were scraped one month before the beginning of this study in order to evaluate the recruitment (recruitment-treatments). Three other transects were monitored without manipulation (monitoring treatments). Species composition and relative abundance were evaluated monthly between September and December, 2000. A total of 26 species was found at Urca and 13 at Catalão. The percent cover of the most abundant organisms was not similar between treatments at Urca after four months, while in Catalão, the similarity was 72% in the second month. The faster community development and recovery at the most polluted area was probably related to the existence of simple and resilient communities in more impacted areas.


2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Juan Diego Gaitán-Espitia ◽  
Roland Sánchez ◽  
Paulina Bruning ◽  
Leyla Cárdenas
Keyword(s):  

Author(s):  
M. Canessa ◽  
G. Bavestrello ◽  
E. Trainito ◽  
A. Navone ◽  
R. Cattaneo-Vietti

AbstractStructure and diversity of sessile zoobenthic assemblages seem to be driven not only by chemical-physical constraints and biological interactions but also by substrate lithology and its surface features. Nevertheless, broadly distributed crustose epilithic corallines could mask the role of substrate on animal settling. To evaluate the direct influence of different rocky substrates, occurrence and coverage of several sessile species, growing on the dark (i.e. coralline-free) face of sublittoral limestone and granite boulders were compared in the Tavolara MPA (Mediterranean Sea). The analysis of photographic samples demonstrated significant differences in terms of species composition and coverage, according to lithology. Moreover, limestone boulders were widely bare, while the cover per cent was almost total on granite. The leading cause of observed patterns could be the different level of dissolution of the two types of rocks, due to their different mineral composition and textural characteristics. Limestone has previously been shown to have higher dissolution compared with granite, and consequently, a more unstable surface. Our results suggest that, in dark habitats, the absence of the crustose coralline layer allows more rock dissolution and consequent lower stability of the limestone compared with granite, which, in turn, reduces the zoobenthos colonization.


2018 ◽  
Vol 201 ◽  
pp. 88-97 ◽  
Author(s):  
Cecilia Balboa ◽  
Carlos Molinet ◽  
Nancy Barahona ◽  
Patricio A. Díaz ◽  
Dagoberto Subiabre ◽  
...  

2020 ◽  
Vol 107 ◽  
pp. 187-193
Author(s):  
Phillip Dettleff ◽  
Maximiliano Villagra ◽  
Joaquín González ◽  
Marcia Fuentes ◽  
Juan Manuel Estrada ◽  
...  

2012 ◽  
Vol 47 (2) ◽  
pp. 257-272 ◽  
Author(s):  
Carlos Molinet ◽  
Carlos A Moreno ◽  
Edwin J Niklitschek ◽  
Manira Matamala ◽  
Mónica Neculman ◽  
...  
Keyword(s):  

2020 ◽  
Vol 25 (3) ◽  
pp. 121-126
Author(s):  
Ana Faricha ◽  
Isa N. Edrus ◽  
Sasanti R. Suharti ◽  
Rizkie S. Utama ◽  
Agus Budiyanto ◽  
...  

The coral reef environment has a strong influence on associated organisms such as fishes, mollusks, and others. Wherein, the butterflyfishes are marine fishes which closely associated with the tropic group as dietary specialization i.e. obligate coral feeder, facultative, and generalist. The obligate may respond only to change in preferred corals and not indicate others. However, generalist show in different response in habitat deteriorates and may allow switching feeding to a less preferred one. Many questions remain about food specific at the species level which may potentially as bio-indicator for coral conditions. Here, we studied the species composition among coral coverage. We explore the environmental degradation in Taka Bonerate National Park impact on food resources and fishes especially for butterflyfishes community. This study focused on family Chaetodontidae with UVC method and UPT method for coral cover. This study was carried out at Taka Bonerate National Park, South Sulawesi between May and June 2019. There were 342 individuals observed and dominated by Chaetodon kleinii, Hemitaurichthys polylepis, Heniochus chrysostomus, C. lunulatus, C. melannotus, C punctatofasciatus, and Forcipiger flavissimus. However, we found a site with diversity index and coral cover has across conditions. Whilst, these benthic communities mostly dominated by Acropora, which may be preferenced by specific species. Butterflyfishes have several types of foraging tasks and may impact in utilizing the coral reef and other social habitats used. The species composition and abundance of butterflyfishes had relations not only by coral coverage but also benthic compositions. However, factors that regulate its specific species distribution and species compositions are still under study.


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