Shrubland formations and associations in mediterranean-desert transitional zones of northwestern Baja California |
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Authors: | M Peinado F Alcaraz J L Aguirre J Delgadillo I Aguado |
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Institution: | (1) Departamento de Biología Vegetal, Universidad de Alcalá de Henares, E-28871 Alcalá de Henares, Madrid, Spain;(2) Departamento de Biología Vegetal, Universidad de Murcia, E-33600 Murcia, Spain;(3) Facultad de Ciencias, Universidad Autónoma de Baja California, Ensenada BC, Mexico |
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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.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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Keywords: | Baja California Biotypes Chaparral Coastal sage scrub Coastal succulent scurb Desertscrub Endemics Phytosociology Shrublands Southern California |
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