Hydrodynamic response of subduction zones to seismic activity: A case study for the Costa Rica margin

2006 ◽  
Vol 426 (1-2) ◽  
pp. 167-187 ◽  
Author(s):  
Paula A. Cutillo ◽  
Shemin Ge ◽  
Elizabeth J. Screaton
Keyword(s):  
Costa Rica ◽  
Seismic Activity ◽  
Subduction Zones ◽  
Hydrodynamic Response ◽  
Costa Rica Margin

scholarly journals Helarchaeota and co-occurring sulfate-reducing bacteria in subseafloor sediments from the Costa Rica Margin

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Rui Zhao ◽  
Jennifer F. Biddle
Keyword(s):  
Costa Rica ◽  
Metabolic Pathways ◽  
Phylogenetic Analyses ◽  
Sulfate Reducing Bacteria ◽  
Sulfate Reducing ◽  
Hydrocarbon Emission ◽  
Costa Rica Margin ◽  
Reducing Bacteria ◽  
Electron Transfers ◽  
Deep Sediments

AbstractDeep sediments host many archaeal lineages, including the Asgard superphylum which contains lineages predicted to require syntrophic partnerships. Our knowledge about sedimentary archaeal diversity and their metabolic pathways and syntrophic partners is still very limited. We present here new genomes of Helarchaeota and the co-occurring sulfate-reducing bacteria (SRB) recovered from organic-rich sediments off Costa Rica Margin. Phylogenetic analyses revealed three new metagenome-assembled genomes (MAGs) affiliating with Helarchaeota, each of which has three variants of the methyl-CoM reductase-like (MCR-like) complex that may enable them to oxidize short-chain alkanes anaerobically. These Helarchaeota have no multi-heme cytochromes but have Group 3b and Group 3c [NiFe] hydrogenases, and formate dehydrogenase, and therefore have the capacity to transfer the reducing equivalents (in the forms of hydrogen and formate) generated from alkane oxidation to external partners. We also recovered five MAGs of SRB affiliated with the class of Desulfobacteria, two of which showed relative abundances (represented by genome coverages) positively correlated with those of the three Helarchaeota. Genome analysis suggested that these SRB bacteria have the capacity of H2 and formate utilization and could facilitate electron transfers from other organisms by means of these reduced substances. Their co-occurrence and metabolic features suggest that Helarchaeota may metabolize synergistically with some SRB, and together exert an important influence on the carbon cycle by mitigating the hydrocarbon emission from sediments to the overlying ocean.

Assessing regional drought impacts on vegetation and evapotranspiration: a case study in Guanacaste, Costa Rica

2019 ◽  
Vol 29 (2) ◽  
Author(s):  
Savannah S. Cooley ◽  
Christopher A. Williams ◽  
Joshua B. Fisher ◽  
Gregory H. Halverson ◽  
Johan Perret ◽  
...  
Keyword(s):  
Costa Rica ◽  
Drought Impacts ◽  
Regional Drought

Temporal Variation of Soil Gas Radon Associated with Seismic Activity: A Case Study in NW Greece

2019 ◽  
Vol 177 (2) ◽  
pp. 821-836 ◽  
Author(s):  
C. Papachristodoulou ◽  
K. Stamoulis ◽  
K. Ioannides
Keyword(s):  
Temporal Variation ◽  
Seismic Activity ◽  
Soil Gas ◽  
Soil Gas Radon

scholarly journals Using a Ladder of Seeps With Computer Decision Processes to Explore for and Evaluate Cold Seeps on the Costa Rica Active Margin

2021 ◽  
Vol 9 ◽  
Author(s):  
Peter Vrolijk ◽  
Lori Summa ◽  
Benjamin Ayton ◽  
Paraskevi Nomikou ◽  
Andre Hüpers ◽  
...  
Keyword(s):  
Costa Rica ◽  
Chemical Compounds ◽  
Decision Processes ◽  
Mission Planning ◽  
Cold Seeps ◽  
Fluid Sample ◽  
Deep Subsurface ◽  
Costa Rica Margin ◽  
Query Structure ◽  
Scientific Questions

Natural seeps occur at the seafloor as loci of fluid flow where the flux of chemical compounds into the ocean supports unique biologic communities and provides access to proxy samples of deep subsurface processes. Cold seeps accomplish this with minimal heat flux. While individual expertize is applied to locate seeps, such knowledge is nowhere consolidated in the literature, nor are there explicit approaches for identifying specific seep types to address discrete scientific questions. Moreover, autonomous exploration for seeps lacks any clear framework for efficient seep identification and classification. To address these shortcomings, we developed a Ladder of Seeps applied within new decision-assistance algorithms (Spock) to assist in seep exploration on the Costa Rica margin during the R/V Falkor 181210 cruise in December, 2018. This Ladder of Seeps [derived from analogous astrobiology criteria proposed by Neveu et al. (2018)] was used to help guide human and computer decision processes for ROV mission planning. The Ladder of Seeps provides a methodical query structure to identify what information is required to confirm a seep either: 1) supports seafloor life under extreme conditions, 2) supports that community with active seepage (possible fluid sample), or 3) taps fluids that reflect deep, subsurface geologic processes, but the top rung may be modified to address other scientific questions. Moreover, this framework allows us to identify higher likelihood seep targets based on existing incomplete or easily acquired data, including MBES (Multi-beam echo sounder) water column data. The Ladder of Seeps framework is based on information about the instruments used to collect seep information (e.g., are seeps detectable by the instrument with little chance of false positives?) and contextual criteria about the environment in which the data are collected (e.g., temporal variability of seep flux). Finally, the assembled data are considered in light of a Last-Resort interpretation, which is only satisfied once all other plausible data interpretations are excluded by observation. When coupled with decision-making algorithms that incorporate expert opinion with data acquired during the Costa Rica experiment, the Ladder of Seeps proved useful for identifying seeps with deep-sourced fluids, as evidenced by results of geochemistry analyses performed following the expedition.

The use of hand-raised psittacines for reintroduction: a case study of scarlet macaws (Ara macao) in Peru and Costa Rica

2005 ◽  
Vol 121 (3) ◽  
pp. 465-472 ◽  
Author(s):  
Donald Brightsmith ◽  
Jenifer Hilburn ◽  
Alvaro del Campo ◽  
Janice Boyd ◽  
Margot Frisius ◽  
...  
Keyword(s):  
Costa Rica ◽  
Ara Macao

scholarly journals Filling in the Missing Link between Universalism and Democracy: The Case of Costa Rica

2014 ◽  
Vol 56 (4) ◽  
pp. 98-118 ◽  
Author(s):  
Juliana Martínez Franzoni ◽  
Diego Sánchez-Ancochea
Keyword(s):  
Costa Rica ◽  
Policy Process ◽  
Policy Design ◽  
Building Blocks ◽  
Missing Link ◽  
Payroll Taxes ◽  
Adoption And Implementation ◽  
Successful Case ◽  
Key Aspects

AbstractThis article explores a missing link in the recent literature on the formation of social policies: that between democracy and universalism, one desirable yet elusive feature of these policies. We base our argument on a case study of Costa Rica, the most successful case of universalism in Latin America. We proceed by first depicting Costa Rica's peculiar policy architecture, based on the incremental expansion of benefits funded on payroll taxes. Then we reconstruct the policy process to stress the key role played by technopoliticians in a democratic context. Backed by political leadership and equipped with international ideas, technopoliticians drove social policy design from agenda setting to adoption and implementation. Third, we argue that key aspects of the policy architecture established in the early 1940s were fundamental building blocks for a distinctive and seldom explored road to universalism. We conclude considering contemporary implications.

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