scholarly journals Factors affecting Fe and Zn contents of mesozooplankton from the Costa Rica Dome

2015 ◽  
Vol 38 (2) ◽  
pp. 331-347 ◽  
Author(s):  
Stephen B. Baines ◽  
Xi Chen ◽  
Benjamin S. Twining ◽  
Nicholas S. Fisher ◽  
Michael R. Landry
Keyword(s):  
Costa Rica ◽  
Factors Affecting ◽  
Costa Rica Dome

Subseasonal SST Variability in the Tropical Eastern North Pacific during Boreal Summer

2008 ◽  
Vol 21 (17) ◽  
pp. 4149-4167 ◽  
Author(s):  
Eric D. Maloney ◽  
Dudley B. Chelton ◽  
Steven K. Esbensen
Keyword(s):  
Costa Rica ◽  
Warm Pool ◽  
Boreal Summer ◽  
Sst Variability ◽  
East Pacific ◽  
Pacific Warm Pool ◽  
Northern Edge ◽  
Precipitation Anomalies ◽  
Sst Anomalies ◽  
Costa Rica Dome

Abstract Boreal summer intraseasonal (30–90-day time scale) sea surface temperature (SST) variability in the east Pacific warm pool is examined using Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) sea surface temperatures during 1998–2005. Intraseasonal SST variance maximizes at two locations in the warm pool: in the vicinity of 9°N, 92°W near the Costa Rica Dome and near the northern edge of the warm pool in the vicinity of 19°N, 108°W. Both locations exhibit a significant spectral peak at 50–60-day periods, time scales characteristic of the Madden–Julian oscillation (MJO). Complex empirical orthogonal function (CEOF) and spectra coherence analyses are used to show that boreal summer intraseasonal SST anomalies are coherent with precipitation anomalies across the east Pacific warm pool. Spatial variations of phase are modest across the warm pool, although evidence exists for the northward progression of intraseasonal SST and precipitation anomalies. Intraseasonal SSTs at the north edge of the warm pool lag those in the vicinity of the Costa Rica Dome by about 1 week. The MJO explains 30%–40% of the variance of intraseasonal SST anomalies in the east Pacific warm pool during boreal summer. Peak-to-peak SST variations of 0.8°–1.0°C occur during MJO events. SST is approximately in quadrature with MJO precipitation, with suppressed (enhanced) MJO precipitation anomalies leading positive (negative) SST anomalies by 7–10 days. Consistent with the CEOF and coherence analyses, MJO-related SST and precipitation anomalies near the Costa Rica Dome lead those at the northern edge of the warm pool by about 1 week.

Wind Generation of the Costa Rica Dome

Science ◽  
1981 ◽  
Vol 214 (4520) ◽  
pp. 552-554 ◽  
Author(s):  
E. E. HOFMANN ◽  
A. J. BUSALACCHI ◽  
J. J. Q'BRIEN
Keyword(s):  
Costa Rica ◽  
Wind Generation ◽  
Costa Rica Dome

scholarly journals The biological pump in the Costa Rica Dome: an open-ocean upwelling system with high new production and low export

2015 ◽  
Vol 38 (2) ◽  
pp. 348-365 ◽  
Author(s):  
Michael R. Stukel ◽  
Claudia R. Benitez-Nelson ◽  
Moira Décima ◽  
Andrew G. Taylor ◽  
Carolyn Buchwald ◽  
...  
Keyword(s):  
Costa Rica ◽  
Open Ocean ◽  
Biological Pump ◽  
New Production ◽  
Upwelling System ◽  
Costa Rica Dome

Factors affecting infestation by larvae of Phyllophaga spp. (Coleoptera: Scarabaeidae) in Costa Rica

1985 ◽  
Vol 75 (3) ◽  
pp. 417-428 ◽  
Author(s):  
A. B. S. King
Keyword(s):  
Costa Rica ◽  
Close Association ◽  
Acid Soil ◽  
Ground Cover ◽  
Phosphate Fertilizer ◽  
Common Species ◽  
Larval Survival ◽  
Factors Affecting ◽  
Consequent Reduction ◽  
Third Instar Larvae

AbstractObservations were made on the behaviour of some Costa Rican species of Phyllophaga. Studies of oviposition and early larval survival under controlled conditions indicated that P. menetriesii (Blanchard) laid most eggs under a ground cover containing grasses and that the presence of living roots in the soil was important to the survival of the young larvae of the two most common species, P. menetriesii and P. vicina (Moser). At Turrialba, Costa Rica, the destruction of young maize plants by larvae of these two species and the consequent reduction in yield were significantly greater in land which was weedy or in close association with stands of old cassava plants, than where weeds had been effectively controlled and cassava was absent. Both plant loss and yields of maize were significantly correlated with larval densities. The best correlations were with numbers of second- and third-instar larvae sampled in July and with the total numbers of third-instar larvae sampled. Regression analyses established that 4·45 seedlings, or approximately 170 kg dry grain/ha, were lost per larva per square metre sampled during the seedling stage in July. An expression to calculate the economic threshold was determined. Significantly more larvae of P. vicina were found in maize growing on ridged than on unridged land, and where applications of lime and phosphate fertilizer had been made to an acid soil. The significance of weed control on infestation is discussed.

scholarly journals Relación entre el estrés y las bacterias entomopatógenas Pantoea (Erwinia) agglomerans (herbicola) y Bacillus cereus en jobotos (Col: Melolonthidae) (Phyllophaga spp., Anomala spp. y Cyclocephala spp.), en Costa Rica.

2016 ◽  
Vol 9 (2) ◽  
pp. 25
Author(s):  
Edgar Vargas ◽  
Giselle Abarca
Keyword(s):  
Costa Rica ◽  
Bacillus Cereus ◽  
Central Valley ◽  
Adult Mortality ◽  
Pantoea Agglomerans ◽  
Stress Factors ◽  
White Grub ◽  
Central Pacific ◽  
White Grubs ◽  
Factors Affecting

Concentrations of Colony Forming Units (CFU) were determined for two entomopathogenic bacteria (Pantoea agglomerans and Bacillus cereus), at the egg, larval, pupal, and adult stages of agriculturally important Phyllophaga and Cyclocephala white grubs, which were collected in five agroecosystems in Costa Rica. L2 and L3  larvae of Phyllophaga elenans collected in all regions where the study was conducted were extensive carriers of Pantoea agglomerans and Bacillus cereu. L2 and L3 larvae of Phyllophaga obsoleta, Phyllophaga menetriesi, Cyclocephala sanguinicollis and Cyclocephala castaniella found in the Central Valley and Central Pacific regions were carriers of Pantoea agglomerans and Bacillus cereus bacteria. In 60% to 90% of larvae in all white grub varieties studied, Pantoea agglomerans showed greater concentrations of CFU than Bacillus cereu, which showed the lowest CFU concentration. Egg, pupal, and adult mortality in all Phyllophaga species was due to Pantoea agglomerans in 62%, 80% and 22.5% of the cases, respectively. A possible antagonistic interaction between Pantoea agglomerans and Bacillus cereus is also discussed. In general, it was noted that light and larval manipulation were the main stress factors affecting these scarabids.

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