References
- Baker DE , Amacher MC . 1982 . Nickel, copper, zinc, and cadmium . In: Page AL , Miller RH , Keeney DR , editors . Methods of soil analysis, Part 2. Chemical and microbiological properties. Agronomy Monograph no. 9 . Madison (WI) : American Society of Agronomy . p 323 – 336 .
- Barbour , M , Burk , JH , Pitts , WD , Gulliam , FS and Schwartz , MW . 1999 . Terrestrial plant ecology , Menlo Park (CA) : Benjamin/Cummings .
- Beals , EW . 1984 . Bray-Curtis ordination: an effective strategy for analysis of multivariate ecological data . Adv Ecol Res , 14 : 1 – 55 .
- Bohn , HL . 1971 . Redox potential . Soil Sci , 112 : 39 – 45 .
- Bradley , PM and Morris , JT . 1990 . Physical characteristics of salt marsh sediments – ecological implications . Mar Ecol Prog Ser , 61 : 245 – 252 .
- Bremner , JM and Keeney , DR . 1966 . Determination and isotope-ratio analysis of different forms of nitrogen in soils. 3. Exchangeable ammonium, nitrate, and nitrite by extraction-distillation methods . Soil Sci Soc Am Proc , 30 : 577 – 582 .
- Byrnside , DS and Sturgis , MB . 1958 . Soil phosphorous and its fractions as related to response of sugar cane to fertilizer phosphorous , Baton Rouge (LA) : Louisiana State University and Agricultural and Mechanical College, Agriculture Experiment Station .
- D'Antonio , CM and Vitousek , PM . 1992 . Biological invasions by exotic grasses, the grass/fire cycle, and global change . Ann Rev Ecol Syst , 23 : 63 – 87 .
- Daubenmire , R . 1972 . Ecology of Hyparrhenia rufa (Nees) in derived savanna in north-western Costa Rica . J Appl Ecol , 13 : 11 – 23 .
- Del Ángel Pérez , AL . 1993 . “ La ganadería bovina entre ejidatarios: ¿sistema de producción o mecanismo de sobrevivencia? ” . In Desarrollo y medio ambiente en Veracruz , Edited by: Barrera , N and Rodríguez , H . 289 – 297 . México, DF : Fundación Friedrich Ebert .
- Denny , P . 1993 . “ Wetlands of Africa: introduction ” . In Wetlands of the world I: inventory, ecology and management , Edited by: Whigham , DF , Dykyjová , D and Hejný , S . 1 – 28 . Dordrecht, , the Netherlands : Kluwer Academic Publishers .
- Diego Pérez , N , Fonseca , RM , Pérez Lozada , L and Lorea Hernández , F . 1993 . Vegetación de las lagunas costeras y zonas inundables del Estado de Guerrero, México . Brenesia , 39–40 : 7 – 28 .
- EPA . 1979 . Methods for chemical analysis of water and wastes . EPA-600/4-79-020 . Cincinnati (OH) : U.S. Environmental Protection Agency .
- Faith , DP , Minchin , PR and Belbin , L . 1987 . Compositional dissimilarity as a robust measure of ecological distance . Vegetatio , 69 : 57 – 68 .
- Fisher , MJ , Rao , IM , Ayarza , MA , Lascano , CE , Sainz , JI , Thomas , RJ and Vera , RR . 1994 . Carbon storage by introduced deep-rooted grasses in the South American Savannas . Nature , 371 : 236 – 238 .
- García Márquez , F . 1984 . Topografía aplicada , México, DF : Editorial Concepto .
- Hausenbuiller , RL . 1972 . Soil science principles and practices , Dubuque (IA) : Wm. C. Brown Publishers .
- Howard-Williams , C and Walker , BH . 1974 . The vegetation of a tropical African lake: classification and ordination of the vegetation of Lake Chilwa (Malawi) . J Ecol , 62 : 831 – 854 .
- Huston , MA . 1994 . Biological diversity: the coexistence of species on changing landscapes , Cambridge : Cambridge University Press .
- John , EM , Lévêque , C and Newton , LE . 1993 . “ Western Africa ” . In Wetlands of the world I: inventory, ecology and management , Edited by: Whigham , DF , Dykyjová , D and Hejný , S . 47 – 78 . Dordrecht, , the Netherlands : Kluwer Academic Publishers .
- Kent , M and Coker , P . 1992 . Vegetation description and analysis. A practical approach , London : CRC Press .
- Kent , M , Gill , WJ , Weaver , RE and Armitage , RP . 1997 . Landscape and plant community boundaries in biogeography . Prog Phys Geog , 21 : 315 – 353 .
- López Rosas , H , Moreno-Casasola , P and Mendelssohn , IA . 2006 . Effects of experimental disturbances on a tropical freshwater marsh invaded by the African grass Echinochloa pyramidalis . Wetlands , 26 : in press
- Lot , A . 1971 . Estudios sobre fanerógamas marinas en las cercanías de Veracruz, Veracruz . An Inst Biol UNAM, ser Bot , 42 ( 1 ) : 2 – 48 .
- Lot , A , Novelo , A and Ramírez , P . 1993 . “ Diversity of Mexican aquatic vascular plant flora ” . In Biological diversity of Mexico: Origins and distribution , Edited by: Ramamoorthy , TP , Bye , R , Lot , A and Fa , J . 577 – 591 . New York : Oxford University Press .
- Lot A , Novelo A , Olvera M , Ramírez P. 1999 . Catálogo de angiospermas acuáticas de México: hidrófitas estrictas emergentes, sumergidas y flotantes . Serie Cuadernos del Instituto de Biología No. 33 . México, DF : Instituto de Biología, UNAM .
- McCune , B . 1994 . Improving community analysis with the Beals smoothing function . Ecoscience , 1 : 82 – 86 .
- McCune , B and Grace , JB . 2002 . Analysis of ecological communities , Gleneden Beach (OR) : MjM Software Design .
- McCune B , Mefford MJ. 1999 . PC-ORD for Windows. Multivariate analysis of ecological data . Version 4.01 . Gleneden Beach (OR) : MjM Software Design .
- McKee , KL , Mendelssohn , IA and Hester , MW . 1988 . A reexamination of pore water sulfide concentrations and redox potentials near the aerial roots of Rhizophora mangle and Avicennia germinans . Am J Bot , 75 : 1352 – 1359 .
- Melgarejo Vivanco , JL . 1980 . Historia de la ganadería en Veracruz , Xalapa, Mexico : Ediciones del Gobierno de Veracruz .
- Minchin , PR . 1987 . An evaluation of the relative robustness of techniques for ecological ordination . Vegetatio , 69 : 89 – 108 .
- Mitsch , WJ and Gosselink , JG . 2000 . Wetlands , 3rd ed. , New York : John Wiley & Sons .
- Novelo , RA . 1978 . La vegetación de la estación biológica El Morro de la Mancha, Veracruz . Biotica , 3 : 9 – 23 .
- Ocaña , D and Lot , A . 1996 . Estudio de la vegetación acuática vascular del sistema fluvio-lagunar-deltaico del Río Palizada, en Campeche, México . An Inst Biol UNAM, ser Bot , 67 ( 2 ) : 303 – 327 .
- Orozco , SA and Lot , A . 1976 . La vegetación de las zonas inundables del sureste de Veracruz . Biotica , 1 : 1 – 44 .
- Parsons , JJ . 1972 . Spread of African pasture grasses to the American tropics . J Range Manage , 25 : 12 – 17 .
- Patrick WH , Gambrell RP , Faulkner SP . 1996 . Redox measurements of soils . In: Sparks DL , editor . ‘Methods of soil analysis, Part 3. Chemical methods . SSSA Book Series no. 5’ . Madison (WI) : American Society of Agronomy . p 1255 – 1273 .
- Ramakrishnan , PS and Vitousek , PM . 1989 . “ Ecosystem-level processes and the consequences of biological invasions ” . In Biological invasions: a global perspective , Edited by: Drake , JA , Mooney , HA , di Castri , F , Groves , RH , Kruger , FJ , Rejmánek , M and Williamson , M . 281 – 300 . New York : John Wiley & Sons .
- Rojas , J and Novelo , A . 1995 . Flora y vegetación acuáticas del Lago de Cuitzeo, Michoacán, México . Acta Bot Mex , 31 : 1 – 17 .
- SAS Institute . 1999 . SAS/STAT® User's Guide , Version 8 . Cary (NC) : SAS Institute Inc.
- Siemens AH. 1998 . A favored place . San Juan river wetlands, Central Veracruz, A. D. 500 to the present . Austin (TX) : University of Texas Press .
- Siemens , AH , Hebda , RH , Navarrete Hernández , M , Piperno , DR , Stein , JK and Zolá Báez , MG . 1988 . Evidence for a cultivar and a chronology from patterned wetlands in Central Veracruz, Mexico . Science , 242 : 105 – 107 .
- Skerman , PJ and Riveros , F . 1990 . Tropical Grasses , Rome : FAO .
- Vázquez-Yanes , C . 1971 . La vegetación de la laguna de Mandinga, Veracruz . An Inst Biol UNAM, ser Bot , 42 ( 1 ) : 49 – 94 .
- Vesey-FitzGerald , DF . 1963 . Central African grasslands . J Ecol , 51 : 243 – 274 .
- Yetter JC. 2004 . Hydrology and geochemistry of freshwater wetlands on the Gulf coast of Veracruz, Mexico [dissertation] . Waterloo, Ontario : University of Waterloo . 168 p . Available from: University of Waterloo Library; CA2ON UW420 2004Y47 .
- Weller , MW . 1994 . Freshwater marshes , 3rd ed , Minneapolis (MN) : University of Minnesota Press .
- Williams , DG and Black , RA . 1994 . Response to drought for a native and introduced Hawaiian grass . Oecologia , 97 : 512 – 519 .
- Williams , DG and Baruch , Z . 2000 . African grass invasion in the Americas: ecosystem consequences and the role of ecophysiology . Biol Inv , 2 : 123 – 140 .
- Williams , TR , Van Doren , JB , Smith , BR , McElvany , SW and Zink , H . 1986 . ICP analysis of biological samples . Am Lab , 18 : 52 – 57 .
- Zar , JH . 1984 . Biostatistical analysis , Englewood Cliffs (NJ) : Prentice-Hall .