scholarly journals Spatial distribution of macrofauna within a sandy beach on the Caribbean coast of Costa Rica

2018 ◽  
Vol 66 (1-1) ◽  
pp. 176 ◽  
Author(s):  
Jeffrey A. Sibaja-Cordero
Keyword(s):  
Spatial Distribution ◽  
Costa Rica ◽  
Random Distribution ◽  
Sandy Beach ◽  
Niche Partitioning ◽  
Food Resource ◽  
Caribbean Coast ◽  
Tide Level ◽  
The Caribbean ◽  
Mechanical Disturbances

Knowingthe spatial pattern and densities of individuals in apopulation is basic to understand ecology such as their response to environmental gradients.The main goal of the present study is to describe the abundances and distribution of thebenthicfauna in thelower intertidallevelof asandybeach at PacuareReserve, Caribbean Coast, Costa Rica. The count data of five taxa (in 29 cores) was analyzed to determine their spatial distribution. Two species of polychaetes were found: the first, Scolelepis (Scolelepis) squamata (O. F. Mueller, 1806) was common in the center of the beach in an aggregated pattern. The second, Pisionidens indica (Aiyar & Alikunhi, 1940) was present in low densities with a random distribution pattern. Moreover, two isopods were found: Excirolana braziliensis Richardson, 1912 was randomly distributed along the beach while Ancinus brasiliensis Lemos de Castro, 1959 appeared only in two stations. A meiofaunal nemerteanattached tograins of sand was the mostcommon organismin theintertidal zone, showing a clumped pattern. Thepatches ofabundancewithin the beachcould be duetoamorphologicchangethat imposes the influenceof thestrongsurf conditions. Moreover, food resource distribution, niche partitioning or competition within the same tide level could influence the different patterns of distribution found in the sediment among the species. In these unstable sediments, the fauna was limited to few opportunist taxa well adapted to withstand mechanical disturbances.

scholarly journals Geomorphology of the Caribbean coast of Costa Rica

2019 ◽  
Vol 15 (2) ◽  
pp. 363-371 ◽  
Author(s):  
Adolfo Quesada-Román ◽  
Paula M. Pérez-Briceño
Keyword(s):  
Costa Rica ◽  
Caribbean Coast ◽  
The Caribbean

scholarly journals Intra and inter annual variation in a seagrass meadow on the Caribbean coast of Costa Rica: 2009-2015

2018 ◽  
Vol 66 (3) ◽  
pp. 1149 ◽  
Author(s):  
Margarita Loría-Naranjo ◽  
Jimena Samper-Villarreal ◽  
Marylaura Sandoval-Siles ◽  
Jorge Cortés
Keyword(s):  
Costa Rica ◽  
Leaf Area ◽  
Turnover Rate ◽  
Seagrass Meadow ◽  
Seagrass Beds ◽  
Seagrass Bed ◽  
Monitoring Methods ◽  
Caribbean Coast ◽  
Area Index ◽  
The Caribbean

Seagrass beds are an important ecosystem on the Caribbean coast of Costa Rica. At Cahuita National Park (CNP) a seagrass bed at Perezoso has been monitored continually since 1999 within the CARICOMP program. Thalassia testudinum is the dominant seagrass species, in some cases mixed with Syringodium filiforme. The results from the 2009 to 2015 monitoring period are presented here, and contrasted with data before 2009. Total (above and below ground tissue) mean biomass of T. testudinum was higher (1 255.4 ± 146.0 gm-2) than biomass before 2009, with an increasing tendency. However, productivity (1.5±0.59 gm-2d-1) and turnover rate (4.3 ± 1.22 %d-1) were lower than previous monitoring periods. In this period, mean leaf area diminished considerably (4.9 ± 2.30 m2), but leaf area index (LAI) increased (1.9 ± 0.80 m2leafm-2) in comparison to prior monitoring. Productivity, density, turnover rate, LAI and biomass showed intra-annual variations; while mean biomass of T. testudinum did not vary significantly among years. No correlations were found between water salinity, temperature and clarity with seagrass measurements. However, most seagrass parameters were strongly correlated with precipitation. These results highlight the effect of external environmental agents acting on the ecosystem. CNP presents a long-term stable seagrass meadow. However, there are indirect signals, such as high biomass and above-ground biomass proportion, along with low productivity and LAI, which point to a nutrient increment in Perezoso’s seagrass bed. To continue protecting this seagrass bed, it is necessary to improve monitoring methods, and seagrass beds should be included in national conservation policies and monitoring programs.

scholarly journals Proposal to Disseminate the Knowledge of Tsunamis in the Caribbean Coast of Costa Rica, Central America

2014 ◽  
Vol 02 (03) ◽  
pp. 85-90 ◽  
Author(s):  
Mario Fernández Arce ◽  
Daniel Solís ◽  
Juan Luis Porras ◽  
Gino González
Keyword(s):  
Costa Rica ◽  
Central America ◽  
Caribbean Coast ◽  
The Caribbean

Acanthemblemaria aceroi, a new species of tube blenny from the Caribbean coast of South America with notes on Acanthemblemaria johnsoni (Teleostei: Chaenopsidae)

Zootaxa ◽  
2020 ◽  
Vol 4816 (2) ◽  
pp. 209-216
Author(s):  
PHILIP A. HASTINGS ◽  
RON I. EYTAN ◽  
ADAM P. SUMMERS
Keyword(s):  
New Species ◽  
Costa Rica ◽  
South America ◽  
Caribbean Coast ◽  
The Caribbean ◽  
Coi Sequences ◽  
A New Species

Acanthemblemaria aceroi new species is described from the upwelling region of the Caribbean coasts of Venezuela and Colombia. It differs from its closest relative, Acanthemblemaria rivasi Stephens, 1970, known from Panama and Costa Rica, in the posterior extent of the infraorbitals, details of head spination, and unique COI sequences. The description of Acanthemblemaria johnsonsi Almany & Baldwin, 1996, heretofore known only from Tobago, is expanded based on specimens from islands offshore of eastern Venezuela. 

Geotechnical Aspects

1991 ◽  
Vol 7 (2_suppl) ◽  
pp. 35-40 ◽  
Author(s):  
J.P. Singh ◽  
T. Leslie Youd ◽  
Kyle M. Rollins
Keyword(s):  
Costa Rica ◽  
Water Systems ◽  
Soil Liquefaction ◽  
Large Region ◽  
Severe Damage ◽  
Caribbean Coast ◽  
Bocas Del Toro ◽  
The Caribbean ◽  
Banana Plantations

The earthquake caused severe damage that extended over a large region, including the provinces of Limon and Cartago in Costa Rica and the province of Bocas del Toro in Panama. Areas most affected in Costa Rica were the alluvial plains along the Caribbean Coast located west, northwest and southeast of Limon. These areas underwent extensive soil liquefaction and soil failures. Soil liquefaction caused severe damage to roads, bridges, railways, ports, water systems and banana plantations. Geotechnical aspects of bridge and roadway damage are covered in Chapter 6—Bridges.

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