Branching Nature (Juan Armando Sánchez,
Ph.D. – publications):
Left to right:
Alga: Macrodytium marinum; Sea fan: Gorgonia ventalina; Hydroid: Macrorhynchia robusta; Sea
feather: Pseudopterogorgia bipinnata.
Branching patterns, or tree-like forms, are everywhere in
nature: river basins, organ vessels, trees, fungi, algae, hydroids, and corals,
just to mention some. Most organisms on earth contain branching networks. It is
remarkable that algae and sea fans or hydroids and pinnate gorgonians (see
above), in spite of their separate ancestry produce similar branching networks.
Still, despite the recurrence of this pattern in multiple species and levels of
organization, we do not clearly know how this pattern forms or evolves.
Laboratory at
Universidad de los Andes, Research Interests BIOMMAR
2007
Sánchez J.A., Aguilar C, Dorado D, Manrique
N. 2007. Phenotypic plasticity and morphological integration
in a marine modular invertebrate. BMC Evolutionary Biology 7(1): 12.
Sánchez
J.A. 2007. A new genus of
Atlantic octocorals (Octocorallia: Gorgoniidae): systematics of gorgoniids with
asymmetric sclerites. Journal
of Natural History 41(9-12):
493-509.
Grajales
A, Aguilar C, Sanchez JA. 2007 Phylogenetic reconstruction using
secondary structures of Internal Transcribed Spacer 2 (ITS2, rDNA): finding the molecular and morphological gap in
Caribbean gorgonian corals. BMC Evolutionary Biology 7: 90.
Aguilar C,
& Sánchez JA. 2007. Phylogenetic
hypotheses of gorgoniid octocorals according to ITS2
and their predicted RNA secondary structures. Molecular Phylogenetics & Evolution
43(3): 774-86. doi:10.1016/j.ympev.2006.11.005
Aguilar C,
& Sánchez JA. 2007. Molecular morphometrics: contribution of ITS2 sequences and predicted
RNA secondary structures to octocoral systematics. Bulletin of Marine Science
2006
Mcfadden
C. S., S. C. France, J.A. Sánchez & P. Alderslade. 2006. A molecular phylogenetic
analysis of the Octocorallia (Cnidaria: Anthozoa) based on mitochondrial protein-coding sequences. Molecular
Phylogenetics and Evolution, 41(3), 2006, 513-527
Grajales A. & Sánchez
JA. 2006. Discharged nematocysts of Millepora alcicornis. Coral Reefs. 25: 671.
Ward, J.R., Rypien, K., Bruno, J., Harvell, C.D., Jordan, E., Mullen, K., Rodriguez-Martinez,
R., Sanchez, J.A & Smith, G. Coral Diversity and Disease in Mexico. Diseases of
Aquatic Organisms 69: 23-31
Sánchez J.A. & A.A. Rowden. 2006 Octocoral
Diversity on New Zealand Seamounts. Proceedings of the 10th International Coral Reef Symposium
Japan 5:
2005
Sánchez
J.A. 2005. Systematics of the bubblegum corals (Paragorgiidae:
Octocorallia: Cnidaria) with description of new species
from New Zealand and the Eastern Pacific. Zootaxa
1014: 1-72.
Opresko D.M. & J.A. Sánchez. 2005. Caribbean Shallow-water Black Corals (Cnidaria: Anthozoa: Antipatharia). Caribbean Journal of Science 41(3): 492 – 507.
Sánchez J. A. &H. Wirshing. 2005. A field key to the
identification of zooxanthellate octocorals from the
Caribbean and Western Atlantic. Caribbean Journal of Science 41(3): 508 – 522.
Collin R.,
M. C. Díaz, J.Norenburg, R.
M. Rocha, J. A. Sánchez, A. Schulze, M. Schwartz,
& A. Valdés. 2005. Photographic Identification
Guide to Some Common Marine Invertebrates of Bocas Del Toro, Panama. Caribbean
Journal of Science 41(3):
638-707.
Sánchez
J.A. ,
V. Pizarro, A. R. Acosta, P. A. Castillo, P. Herron, J. C. Martínez,
P. Montoya & C. Orozco. 2005 Evaluating Coral Reef benthic Communities from
remote Caribbean Atolls (Quitasueño, Serrana, and Roncador Banks,
Colombia): multivariate approaches to recommend Marine Protected Areas for the SeaFlower Biosphere Reserve (Archipelago of San Andres and Providencia). Atoll
Research Bulletin 531: 1-65.
Garzon S.
P., A. D. Rodriguez, J. A. Sanchez & Eduardo Ortega-Barria, 2005. Sesquiterpenoid metabolites with antiplasmodial activity from a Caribbean gorgonian coral, Eunicea sp. Journal of
Natural Products, 68, 1354-1359.
Ospina, C.A., Rodriguez, A.D., Sanchez, J.A., Ortega-Barria, E., Capson, T.L., And
Mayer, A.M.S. 2005 Caucanolides a-f, unusual antiplasmodial
constituents from a Colombian collection of the gorgonian coral Pseudopterogorgia bipinnata. Journal of Natural Products 68,(10): 1519 – 1526.
2004
Sánchez
J.A., H.R.Lasker, E. G. Nepomuceno, J. D. Sánchez &
M. J. Woldenberg. 2004. Branching and
Self-Organization in Marine Modular Colonial Organisms: a Model. The American
Naturalist 163 (3)
(0003-0147/2004/16303-20458).
Sánchez
J.A. 2004. Evolution and
dynamics of branching colonial form in marine modular Cnidarians: Gorgonian
Octocorals. Hydrobiologia. 530
(1): 283-290.
Sánchez J.A., M.F. Gil, L.H. Chasqui &
E.M. Alvarado. 2004. Grazing dynamics on a Caribbean reef-building coral. Coral
Reefs 23(4): 578-583. (DOI: 10.1007/s00338-004-0419-5)
Sánchez J.A., & S.D. CAIRNS. 2004. An unusual new
gorgonian coral from the Aleutian Islands, North Pacific, Alaska. Zoologishe Mededelingen- Leiden 78: 265-274.
Charry, H. E.M. Alvarado & Sánchez J.A. 2004. Annual skeletal
extension of two reef-building corals from the Colombian Caribbean Sea. Boletín de Investigaciones
Marinas y Costeras 33: 209-222.
Wei, X.,
Rodriguez A.D., Bran P., Raptis
R.G., Sánchez, J.A., E. Ortega-Barria
& J. Gonzales. 2004. Antiplasmoidal cembradiene diterpenoids from a
Southwestern Caribbean gorgonian octocoral of the
genus Eunicea.
Tetrahedron
60: 11813-11819.
Rodriguez,
I., Shi Y-P., Garcia O.J., Rodriguez A.D., Mayer
A.M.S., Sánchez, J.A., E. Ortega-Barria
& J. Gonzales. 2004. New Pseudopterosin and seco-Pseudopterosin diterpene
glycosides from two Colombian isolates of Pseudopterogorgia elisabethae and their diverse biological activities. Journal of
Natural Products 67(10): 1672-1680.
Marrero J,
Rodriguez Ad, Baran P, Raptis
Rg, Sanchez J.A, Ortega-Barria
E, Capson Tl. 2004. Bielschowskysin, a gorgonian-derived biologically active diterpene with an unprecedented carbon skeleton. Organic Letters
6(10):1661-4.
2003
Sánchez
J. A., C. S. Mcfadden, S. C. France, & H. R. Lasker. 2003. Molecular Phylogenetic analyses of
shallow-water Caribbean octocorals. Marine Biology 142: 975-987. (DOI
10.1007/s00227-003-1018-7)
Sánchez
J.A., H.R.Lasker & D.J.
Taylor. 2003. Phylogenetic analyses among octocorals (Cnidaria)
according to mitochondrial and nuclear DNA sequences (lsu-rRNA
16S, and ssu-rRNA 18S) support two convergent clades of branching gorgonians. Molecular
Phylogenetics & Evolution. 29(1): 31-42. (DOI:10.1016/S1055-7903(03)00090-3)
Sánchez
J.A., & H.R.Lasker.
2003. Patterns of Morphologic Integration in Branching Colonies of Marine
Modular Organisms: supra-module organization in Gorgonian Corals. Proceedings of
the Royal Society of London B. 270: 2039-2044. (DOI:
10.1098/rspb.2003.2471)
Sánchez
J.A., & H.R.Lasker.
2003. Do multi-branched colonial organisms exceed normal growth after partial
mortality? Proceedings of the Royal Society of London B (suppl.). (DOI
10.1098/rsbl.2003.0708)
Sánchez
J.A., W. Zeng, V. R. Coluci, C. Simpson & H. R. Lasker.
2003. How similar are branching networks in nature? A view from the ocean:
Caribbean gorgonian corals. Journal of Theoretical Biology. 222: 135-138. (DOI:10.1016/S0022-5193(03)00017-1)
Lasker H.R., M. L. Boller, J. Castanaro & Sánchez J.A.
2003. Modularity and determinate growth in a gorgonian coral.
The
Biological Bulletin 205: 319-330.
Friedlander
A., Sladek-Nowlis J., Sanchez J. A., Appeldoorn R., Usseglio P., Mccormick C., Bejarano S., And
Mitchell-Chui A. 2003. Designing Effective Marine Protected Areas in Old
Providence and Santa Catalina Islands, San Andrés Archipelago, Colombia, Using
Biological and Sociological Information. Conservation
Biology 17(6): 1769-1784.
2002
Sánchez
J.A. 2002. Branching and evolution of modular colonial organisms (Ph.D.
thesis). State University of New York at
Buffalo.
Lasker H.R. & Sánchez
J.A. 2002. Allometry and Astogeny of modular organisms. pp.
207-253. In: R.N. Hughes (ed.), Reproductive Biology of Invertebrates. Vol. XI.
Progress in Asexual Reproduction. John Wiley, New York.
Shi, Y.-P.; Rodríguez, A.D; Barnes,
C.L.; Sánchez, J.A.; Raptis,
R.G.; Baran, P. 2002. New Terpenoid
Constituents from Eunicea pinta. Journal of Natural Products 65 (9):1232-1241. (DOI: 10.1021/np0200820
2001
Lasker H.R. & Sánchez
J.A. 2001.
Octocorals: growth in two and three dimensions. In: J. Kaandorp & J. Klueber (eds.) The Algorithmic Beauty of
Seaweeds, Sponges and Corals. Springer-Verlag, Amsterdam. cover
Sánchez J.A. 2001. Systematics of the Southwestern Caribbean Muriceopsis Aurivillius (Cnidaria: Octocorallia: Gorgonacea)
with description of a new species. Bulletin of the Biological Society of Washington. 10: 160-180.
2000
Diaz Jm., Diaz-Pulido G. &
Sánchez J.A. 2000. Distribution and structure of
the southernmost Caribbean coral reefs: Golfo de Urabá, Colombia. Scientia Marina. 64(3): 327-336.
1999
Sánchez
J.A. 1999. Black coral-octocoral distribution
patterns on a deep-water reef, Imelda bank, Caribbean sea,
Colombia. Bulletin of Marine Science. 65(1): 215-225.
Sánchez J.A., E.M. Alvarado, M.F. Gil, O. Arenas, H. Charry, L.H. Chasqui & R.P.
Garcia. 1999. Synchronous mass spawning of Montastraea
annularis (Ellis & Solander)
and M. faveolata (Ellis & Solander)
(Faviidae: Scleractinia) at
Rosario islands, Caribbean coast of Colombia. Bulletin of Marine Science. 65(3): 873-879.
1998
Sánchez J.A., J.M. Diaz &. S. Zea.
1998. Octocoral and black coral distribution patterns
on the barrier reef-complex of Providencia island,
Southwestern Caribbean. Caribbean Journal of Science. 34 (3-4): 250-264.
1997
Sánchez J.A., S. Zea &. J.M. Diaz.
1997. Gorgonian communities of two contrasting environments from oceanic
Caribbean atolls. Bulletin of Marine Science. 61(2): 61-72.
Diaz, J.M., Sánchez J.A. & J.
Geister. 1997. Development of Lagoonal
reefs in oceanic complexes of the Southwestern Caribbean: geomorphology,
structure and distribution. Proceedings
of the VIII International Coral Reef Symposium, Panama 1: 779-784.
Cobar, O., Rodríguez A.D., Padilla O.L. & J.A. Sánchez 1997. The Calyculaglycosides: Dilophol-type diterpene glycosides exhibiting antiinflammatory activity from the Caribbean gorgonian Eunicea sp. The Journal of Organic Chemistry 62 (21): 7183-7188.
http://www.branchingnature.org/octo/J_Org_Chem_1997_Cobar.pdf
http://www.branchingnature.org/octo/J_Org_Chem_1997_Cobar.pdf
http://www.branchingnature.org/octo/J_Org_Chem_1997_Cobar.pdf
http://www.branchingnature.org/octo/J_Org_Chem_1997_Cobar.pdf
http://www.branchingnature.org/octo/J_Org_Chem_1997_Cobar.pdf
http://www.branchingnature.org/octo/J_Org_Chem_1997_Cobar.pdf
http://www.branchingnature.org/octo/J_Org_Chem_1997_Cobar.pdf
http://www.branchingnature.org/octo/J_Org_Chem_1997_Cobar.pdf
Advanced mathematics (a learning project – Jose Dario
Sanchez Hernandez)
Invertebrate Zoology Collection – Smithsonian
Institution
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