scholarly journals Substratum preference during recruitment of two invasive alien corals onto shallow-subtidal tropical rocky shores

2007 ◽  
Vol 330 ◽  
pp. 101-111 ◽  
Author(s):  
JC Creed ◽  
AF De Paula
Keyword(s):  
Rocky Shores ◽  
Shallow Subtidal ◽  
Substratum Preference

scholarly journals EQUINODERMOS DEL PARQUE NACIONAL NATURAL ENSENADA DE UTRIA (PACIFICO COLOMBIANO)

2016 ◽  
Vol 21 ◽  
Author(s):  
Raul Neira O. ◽  
Perla Barba R. ◽  
Roberto Pardo A.
Keyword(s):  
Coral Reef ◽  
National Park ◽  
Pacific Coast ◽  
New Records ◽  
Rocky Shores ◽  
Sandy Shores ◽  
The Pacific ◽  
Shallow Subtidal ◽  
Colombian Pacific

Fifteen species of echinoderms (5 asteroids, 5 echinoids and 5 ophiuroids) are reported for Natural National Park Ensenada deUtria in the Pacific coast of Chocó, Colombia. For each species, we report its size and ecological observations. Two species, Mithrodia bradleyi and Encope ecuadorensis are new records for the Colombian Pacific coast and are described shortly., Most of the echinoderms found were associated to rocky shores, coral reef and sometimes sandy shores, except Ophiothríx spicuiata and Ophiactis savignyi, which were found living in association with the gorgonia Lophogorgia alba. Hesperocidaris asteriscus and Centrostephanus coronatus live in holes in coral or rock. These are mainly intertidal or shallow subtidal species.

Paracentrotus lividus (Echinodermata: Echinoidea) attachment force and burrowing behavior in rocky shores of SW Portugal*

Zoosymposia ◽  
2012 ◽  
Vol 7 (1) ◽  
pp. 231-240 ◽  
Author(s):  
DAVID JACINTO ◽  
TERESA CRUZ
Keyword(s):  
Sea Urchins ◽  
Paracentrotus Lividus ◽  
Wave Exposure ◽  
Rocky Shores ◽  
Rock Pools ◽  
Test Diameter ◽  
Test Size ◽  
Shallow Subtidal ◽  
Rocky Habitats ◽  
Intertidal Pools

The rock burrowing sea urchin Paracentrotus lividus is a common wave-swept organism that inhabits intertidal rock pools and shallow subtidal temperate shores. Here we present field data on P. lividus attachment force, burrow shape and test diameter measured in different rocky habitats (intertidal pools, low shore intertidal channels and shallow subtidal shores) and in two study sites with different wave-exposure conditions. These data were then analyzed to look for a pos­sible relationship between the size of sea urchins and their attachment force and burrow shape as well as the influence of wave-exposure and habitat in the measured variables. P. lividus test diameter varied among habitats: urchins were smaller in mid-shore intertidal pools and bigger in shallow subtidal shores. We observed in all studied habitats that attachment force was not correlated with test size, while burrow shape index (BSI) was negatively correlated with test size. Results suggest that the attachment force of large and small urchins was similar, but smaller animals occurred in relatively deeper burrows (higher BSI values). Attachment force was positively correlated with BSI, which indicates that burrows may enhance attachment force of P. lividus living in rocky shores by allowing the use of spines as anchorage points and reducing the urchin area exposed to drag forces. Our results partially support the hypothesis that attachment force and BSI might be influenced by local variation in wave-exposure. Higher values for both attachment strength and BSI were measured in intertidal rock pools, the most wave-exposed habitat considered in this study, suggesting that urchins living in such habitat are more able to resist dislodgment by wave-induced forces since they occupy relatively deeper burrows and thusattach more firmly to the substrate. However, neither attachment force nor BSI were higher in the more exposed shore.

Competitive exclusion in evolutionary time: the case of the acorn barnacles

Paleobiology ◽  
1980 ◽  
Vol 6 (02) ◽  
pp. 173-183 ◽  
Author(s):  
Steven M. Stanley ◽  
William A. Newman
Keyword(s):  
Competitive Exclusion ◽  
Marine Ecosystem ◽  
Wall Structure ◽  
Rocky Shores ◽  
Evolutionary Time ◽  
Free Living ◽  
Disjunct Populations ◽  
Competitive Success ◽  
Living Species ◽  
Shallow Subtidal

Barnacles living along rocky shores provide the classic example of competitive dominance in the marine ecosystem: by means of firm attachment and rapid growth, balanoid barnacles commonly undercut and overgrow the genusChthamalus, which is thereby restricted to the upper fringe of the intertidal zone, where balanoids are physiologically incapable of living. Today, after perhaps less than 50 Myr of evolution, balanoid barnacles are in the midst of rampant adaptive radiation, being represented by about 273 species, of which about half are free-living species of intertidal or shallow subtidal habitats. Chthamaloid barnacles, in contrast, are on the decline, having originated at least 70 Myr ago but today comprising only about 53 living species, approximately 40 of which occupy the uppermost intertidal. The remainder persist as localized, relict, and often disjunct populations. Through competitive exclusion, balanoid barnacles have apparently caused the ecological restriction and decline of the chthamaloids. The balanoids have an advanced feeding mechanism, but the most important adaptive breakthrough leading to their competitive success was probably the origin of a tubiferous wall structure, which affords rapid skeletal growth for the efficient monopolization of free space and for the destruction of chthamaloids.

Competitive exclusion in evolutionary time: the case of the acorn barnacles

Paleobiology ◽  
1980 ◽  
Vol 6 (2) ◽  
pp. 173-183 ◽  
Author(s):  
Steven M. Stanley ◽  
William A. Newman
Keyword(s):  
Competitive Exclusion ◽  
Marine Ecosystem ◽  
Wall Structure ◽  
Rocky Shores ◽  
Evolutionary Time ◽  
Free Living ◽  
Disjunct Populations ◽  
Competitive Success ◽  
Living Species ◽  
Shallow Subtidal

Barnacles living along rocky shores provide the classic example of competitive dominance in the marine ecosystem: by means of firm attachment and rapid growth, balanoid barnacles commonly undercut and overgrow the genus Chthamalus, which is thereby restricted to the upper fringe of the intertidal zone, where balanoids are physiologically incapable of living. Today, after perhaps less than 50 Myr of evolution, balanoid barnacles are in the midst of rampant adaptive radiation, being represented by about 273 species, of which about half are free-living species of intertidal or shallow subtidal habitats. Chthamaloid barnacles, in contrast, are on the decline, having originated at least 70 Myr ago but today comprising only about 53 living species, approximately 40 of which occupy the uppermost intertidal. The remainder persist as localized, relict, and often disjunct populations. Through competitive exclusion, balanoid barnacles have apparently caused the ecological restriction and decline of the chthamaloids. The balanoids have an advanced feeding mechanism, but the most important adaptive breakthrough leading to their competitive success was probably the origin of a tubiferous wall structure, which affords rapid skeletal growth for the efficient monopolization of free space and for the destruction of chthamaloids.

Barnacle settlement on rocky shores: Substratum preference and epibiosis on mussels

2015 ◽  
Vol 473 ◽  
pp. 195-201 ◽  
Author(s):  
Caroline Bell ◽  
Christopher D. McQuaid ◽  
Francesca Porri
Keyword(s):  
Rocky Shores ◽  
Substratum Preference

scholarly journals To be or not to be? What molecules say about Runcina brenkoae Thompson, 1980 (Gastropoda: Heterobranchia: Runcinida)

2019 ◽  
Vol 83 (3) ◽  
pp. 223 ◽  
Author(s):  
Ana Karla Araujo ◽  
Marta Pola ◽  
Manuel Antonio E. Malaquias ◽  
Juan Lucas Cervera
Keyword(s):  
Molecular Phylogenetics ◽  
Adriatic Sea ◽  
Nuclear Gene ◽  
Taxonomic Status ◽  
Western Mediterranean ◽  
Integrative Approach ◽  
Rocky Shores ◽  
Western Mediterranean Sea ◽  
Shallow Subtidal ◽  
Anatomical Characters

Runcinids are poorly known minute marine slugs inhabiting intertidal and shallow subtidal rocky shores. Among the European species, Runcina brenkoae, described from the Adriatic Sea in the Mediterranean, has been described to display chromatic variability, placing in question the true identity and geographic distribution of the species. In this paper we investigate the taxonomic status of R. brenkoae based on specimens from the central and western Mediterranean Sea and the southern Iberian coastline of Portugal and Spain, following an integrative approach combining multi-locus molecular phylogenetics based on the mitochondrial markers cytochrome c oxidase subunit I and 16S rRNA and the nuclear gene histone H3, together with the study of morpho-anatomical characters investigated by scanning electron microscopy. To aid in species delimitation, the Automatic Barcode Gap Discovery and Bayesian Poisson tree process methods were employed. Our results indicate the existence of a complex of three species previously identified as R. brenkoae, namely two new species here described (R. marcosi n. sp. and R. lusitanica n. sp.) and R. brenkoae proper.

Recent changes in shallow subtidal fauna with new invertebrate records in Europe's first marine reserve, Lough Hyne

2018 ◽  
Vol 118B (1) ◽  
pp. 29
Author(s):  
Cynthia D. Trowbridge ◽  
Colin Little ◽  
Caitlin Q. Plowman ◽  
Lukas S. Ferrenburg ◽  
Hayley M. Resk ◽  
...  
Keyword(s):  
Marine Reserve ◽  
Shallow Subtidal ◽  
Lough Hyne

Persistence of giants: population dynamics of the limpet Scutellastra laticostata on rocky shores in Western Australia

2020 ◽  
Vol 646 ◽  
pp. 79-92
Author(s):  
RE Scheibling ◽  
R Black
Keyword(s):  
Population Dynamics ◽  
Western Australia ◽  
Size Structure ◽  
Survival Rates ◽  
Maximum Size ◽  
High Rate ◽  
Adult Survival ◽  
Rocky Shores ◽  
Adult Size ◽  
Decadal Time Scale

Population dynamics and life history traits of the ‘giant’ limpet Scutellastra laticostata on intertidal limestone platforms at Rottnest Island, Western Australia, were recorded by interannual (January/February) monitoring of limpet density and size structure, and relocation of marked individuals, at 3 locations over periods of 13-16 yr between 1993 and 2020. Limpet densities ranged from 4 to 9 ind. m-2 on wave-swept seaward margins of platforms at 2 locations and on a rocky notch at the landward margin of the platform at a third. Juvenile recruits (25-55 mm shell length) were present each year, usually at low densities (<1 m-2), but localized pulses of recruitment occurred in some years. Annual survival rates of marked limpets varied among sites and cohorts, ranging from 0.42 yr-1 at the notch to 0.79 and 0.87 yr-1 on the platforms. A mass mortality of limpets on the platforms occurred in 2003, likely mediated by thermal stress during daytime low tides, coincident with high air temperatures and calm seas. Juveniles grew rapidly to adult size within 2 yr. Asymptotic size (L∞, von Bertalanffy growth model) ranged from 89 to 97 mm, and maximum size from 100 to 113 mm, on platforms. Growth rate and maximum size were lower on the notch. Our empirical observations and simulation models suggest that these populations are relatively stable on a decadal time scale. The frequency and magnitude of recruitment pulses and high rate of adult survival provide considerable inertia, enabling persistence of these populations in the face of sporadic climatic extremes.

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