Figueroa Ricardo

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Figueroa
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Ricardo
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  • Article
    Supporting Spartina: Interdisciplinary perspective shows spartina as a distinct solid genus
    (Ecological Society of America, 2019-09-19) Bortolus, Alejandro ; Adam, Paul ; Adams, Janine B. ; Ainouche, Malika L. ; Ayres, Debra ; Bertness, Mark D. ; Bouma, Tjeerd J. ; Bruno, John F. ; Caçador, Isabel ; Carlton, James T. ; Castillo, Jesus M. ; Costa, Cesar S.B. ; Davy, Anthony J. ; Deegan, Linda A. ; Duarte, Bernardo ; Figueroa, Enrique ; Gerwein, Joel ; Gray, Alan J. ; Grosholz, Edwin D. ; Hacker, Sally D. ; Hughes, A. Randall ; Mateos‐Naranjo, Enrique ; Mendelssohn, Irving A. ; Morris, James T. ; Muñoz‐Rodríguez, Adolfo F. ; Nieva, Francisco J.J. ; Levin, Lisa A. ; Li, Bo ; Liu, Wenwen ; Pennings, Steven C. ; Pickart, Andrea ; Redondo‐Gómez, Susana ; Richardson, David M. ; Salmon, Armel ; Schwindt, Evangelina ; Silliman, Brian ; Sotka, Erik E. ; Stace, Clive ; Sytsma, Mark ; Temmerman, Stijn ; Turner, R. Eugene ; Valiela, Ivan ; Weinstein, Michael P. ; Weis, Judith S.
    In 2014, a DNA‐based phylogenetic study confirming the paraphyly of the grass subtribe Sporobolinae proposed the creation of a large monophyletic genus Sporobolus, including (among others) species previously included in the genera Spartina, Calamovilfa, and Sporobolus. Spartina species have contributed substantially (and continue contributing) to our knowledge in multiple disciplines, including ecology, evolutionary biology, molecular biology, biogeography, experimental ecology, biological invasions, environmental management, restoration ecology, history, economics, and sociology. There is no rationale so compelling to subsume the name Spartina as a subgenus that could rival the striking, global iconic history and use of the name Spartina for over 200 yr. We do not agree with the subjective arguments underlying the proposal to change Spartina to Sporobolus. We understand the importance of both the objective phylogenetic insights and of the subjective formalized nomenclature and hope that by opening this debate we will encourage positive feedback that will strengthen taxonomic decisions with an interdisciplinary perspective. We consider that the strongly distinct, monophyletic clade Spartina should simply and efficiently be treated as the genus Spartina.
  • Preprint
    Strontium isotopes in Chilean rivers : the flux of unradiogenic continental Sr to seawater
    ( 2009-08-26) Fiege, Katherina ; Miller, Christian A. ; Robinson, Laura F. ; Figueroa, Ricardo ; Peucker-Ehrenbrink, Bernhard
    Analyses of Chilean river waters indicate that the average yield of unradiogenic Sr (~ 517 mol Sr km− 2 yr− 1, 87Sr/86Sr ~ 0.7057) from western South America (1,220,853 km2) into the southeastern Pacific Ocean is ~ 2–4 times higher than that from Iceland (~ 110 mol Sr km − 2 yr− 1, 87Sr/86Sr ~ 0.7025) and the Deccan traps, but lower than fluxes of unradiogenic Sr from ocean islands in the Lesser Antilles and Réunion. The Sr flux from western South America accounts for about 1.8% of the annual dissolved Sr delivered to the ocean via rivers. If Chilean rivers analyzed in this study accurately characterize runoff from western South America, active convergent continental margins release about as much unradiogenic Sr to seawater as a 0–1 Myr old mid-ocean ridge segment of equivalent length. Modulations of the flux of unradiogenic Sr from active margins over geologic time scales have to be considered as an additional driving force of change in the marine Sr isotope record, supplementing temporal variations in the submarine hydrothermal flux as a source of unradiogenic Sr to seawater. Such modulations can be driven by changes in the surface exposure of volcanic arc terrains, changes in climate, ocean currents and geographic latitude due to plate tectonics, as well as topographic changes that can affect local rainfall, runoff and erosion.