Vegetatio

, Volume 117, Issue 2, pp 165–179

Shrubland formations and associations in mediterranean-desert transitional zones of northwestern Baja California

  • M. Peinado
  • F. Alcaraz
  • J. L. Aguirre
  • J. Delgadillo
  • I. Aguado
Article

Abstract

The area between Ensenada and EI Rosario (Baja California, Mexico) has long been considered as a transitional zone in which two great ecoclimatic regions (Mediterranean and Tropical-Desert) overlap. The floristic and biotypical diversity of this area was evaluated by analyzing its shrubland formations from a phytosociological point of view. This phytosociological study, carried out according to the Braun-Blanquet method and supported by cluster analysis, describes sixteen shrubland associations from Northwestern Baja California.

Floristic diversity of the transitional zone was evaluated using two indices, endemic value (EV) and endemic community value (ECV), which are related to the degree of endemism in the flora and plant associations. The phytosociological analysis showed that the high number of shrubland associations found in this area reflected its transitional character. The closer the associations are to the transitional zone, the higher their biotypical and floristic diversity.

Key words

Baja California Biotypes Chaparral Coastal sage scrub Coastal succulent scurb Desertscrub Endemics Phytosociology Shrublands Southern California 

Abbreviations

ADE

Adenostoma fasciculatum

AES

Fraxinus trifoliata-Aesculus parryi

BER

Bergerocactus emoryi-Agave shawii

DES

Echinocereus engelmannii-Agave deserti

ENC

Viguiera deltoidea-Encelia asperifolia

EUR

Eurotia lanata-Yucca schidigera

FOU

Agave cerulata-Fouquieria columnaris

FRA

Atriplex julacea-Frankenia palmeri

HYM

Baccharis glutinosa-Hymenoclea monogyra

KEC

Clematis lasiantha-Keckiella antirrhinoides

LAR

Ambrosia chenopodifolia-Larrea tridentata

LYC

Ephedra californica-Lycium brevipes

MAH

Malosma laurina-Heteromeles arbutifolia

MUN

Salvia munzii-Artemisia californica

ROS

Rosa minutifolia-Aesculus parryi

SAL

Salvia apiana-Viguiera laciniata

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Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • M. Peinado
    • 1
  • F. Alcaraz
    • 2
  • J. L. Aguirre
    • 1
  • J. Delgadillo
    • 3
  • I. Aguado
    • 1
  1. 1.Departamento de Biología VegetalUniversidad de Alcalá de HenaresMadridSpain
  2. 2.Departamento de Biología VegetalUniversidad de MurciaMurciaSpain
  3. 3.Facultad de CienciasUniversidad Autónoma de Baja CaliforniaEnsenada BCMexico

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