Allometry of two columnar cacti in a tropical deciduous forest
Por:
Lezama-Delgado, Ernesto, Angeles, Guillermo, Mendez-Alonzo, Rodrigo, Lopez-Portillo, Jorge, Golubov, Jordan, Arroyo-Cosultchi, Gabriel, Martinez, Armando J.
Publicada:
1 jun 2022
Categoría:
Plant science
Resumen:
In tropical deciduous forests (TDF), the scaling relations between size
attributes in columnar cacti vary across species, partially because of
environmental pressures to reach the canopy. This study aims to compare
the growth-related allometric relationships between Pilosocereus
leucocephalus (Poselg.) Byles & G.D. Rowley and Cephalocereus scoparius
(Poselg.) Britton & Rose, two conspicuous species of columnar cacti in
the TDF of Mexico. Nonlinear regression models were used to estimate
maximum height (H-max) from diameter and Reduced Major Axis (RMA)
regression models to relate crown cover a height and diameter. The
scaling exponents in both species were similar to other pachycaulous
plant species. However, despite a lower maximum height (H-max) in the
species P. leucocephalus, it has an allometric height exponent than that
recorded in C. scoparius, which suggests that P. leucocephalus allocates
more biomass to vertical development in the early stages of growth. Our
results showed that the stems of C. scoparius increased in height at a
far less rate concerning high than P. leucocephalus, demonstrating that
cacti display different interspecific strategies to coexist in TDF. In
contrast, greater height enables C. scoparius to reach the forest canopy
and compete with C-3 tree species. The columnar cacti also differed in
size and branch number through their development, thus representing two
biomass allocation strategies to optimize light capture or cope with
seasonal drought stress.
Filiaciones:
Lezama-Delgado, Ernesto:
Univ Veracruzana, Ctr Invest Trop, Jose Maria Morelos 44 Colonia Ctr, Xalapa 91000, Veracruz, Mexico
Univ Veracruzana, Inst Neuroetol, Dr Luis Castelazo S-N, Xalapa 91190, Veracruz, Mexico
Angeles, Guillermo:
Inst Ecol AC, Red Ecol Func, Carretera Antigua Coatepec 351, Xalapa 91070, Veracruz, Mexico
Mendez-Alonzo, Rodrigo:
Ctr Invest Cient & Educ Super Ensenada CICESE, Dept Biol Conservac, Carretera Ensenada Tijuana 3918, Ensenada 22860, Baja Ca, Mexico
Lopez-Portillo, Jorge:
Inst Ecol AC, Red Ecol Func, Carretera Antigua Coatepec 351, Xalapa 91070, Veracruz, Mexico
Golubov, Jordan:
Univ Autonoma Metropolitana, Dept Hombre & Ambiente, Calzada Hueso 1100, Ciudad Mexico 04960, Mexico
Arroyo-Cosultchi, Gabriel:
Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Ecol & Recursos Nat, Ciudad Mexico 04510, Mexico
Martinez, Armando J.:
Univ Veracruzana, Inst Neuroetol, Dr Luis Castelazo S-N, Xalapa 91190, Veracruz, Mexico
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