ALTITUDINAL GENETIC VARIATION AMONG Pinus pseudostrobus POPULATIONS FROM MICHOACÁN, MÉXICO. TWO LOCATION SHADEHOUSE TEST RESULTS

Sáenz‐Romero, Cuauhtémoc; Rehfeldt, Gerald E.; Soto-Correa, José C.; Aguilar-Aguilar, Selene; Zamarripa-Morales, Verónica; López-Upton, Javier

doi:10.35196/rfm.2012.2.111

Cited by 18 publications

(10 citation statements)

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“…La variación observada entre poblaciones de Pinus chiapensis en las características de cono también ha sido reportada para otras especies de pino (Iglesias-Andreu et al, 2012;Martínez, 1998;Sáenz-Romero et al, 2012). La variación en el largo y ancho de cono en pinos ha sido relacionada con factores ambientales (López-Upton y Donahue, 1995).…”

Section: Discussionunclassified

CARACTERÍSTICAS REPRODUCTIVAS Y CALIDAD DE SEMILLA EN POBLACIONES FRAGMENTADAS DE Pinus chiapensis (MARTÍNEZ) ANDRESEN

et al. 2021

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Pinus chiapensis (Martínez) Andresen es un árbol de rápido crecimiento, apreciado por su calidad de madera, cuyas poblaciones septentrionales en los límites estatales de Puebla y Veracruz, México son pequeñas, están fragmentadas y presentan repoblación reducida. El objetivo del presente estudio fue caracterizar algunos rasgos reproductivos asociados con la regeneración de siete poblaciones de Pinus chiapensis en dichos estados. Se muestreó un total de 125 árboles (de 15 a 22 árboles por población) y se evaluó la semilla cosechade de una muestra de 10 conos maduros por árbol. Se determinó el largo, ancho y peso seco de cono, el potencial de producción de semilla, los porcentajes de semilla llena, vana, plagada y óvulos abortados, además del peso promedio de la semilla. Se realizó una prueba de germinación en una cámara de ambiente controlado. En todas variables evaluadas se detectaron diferencias significativas entre poblaciones. El largo y ancho promedio de cono fue de 95.9 y 28.7 mm, respectivamente; ambas correlacionaron positivamente con la altitud de origen de la población. El número potencial promedio de semillas por estróbilo fue de 89, de las cuales resultaron 59 % óvulos abortados, 22.6 % semillas vanas, 0.9 % semillas plagadas y 17.5 % semillas llenas, lo que indica una reducida eficiencia de producción de semilla (1 a 16 semillas llenas por cono). El alto porcentaje de óvulos abortados indica problemas de polinización asociados con el tamaño reducido de las poblaciones. Se encontró una eficiencia reproductiva de 25.6 mg de semilla por gramo de cono. La semilla mostró una capacidad germinativa de 75.7 %, un valor pico de 3.74 % por día y un valor germinativo de 9.74. A pesar de la baja producción de semillas llenas y el alto porcentaje de semillas vanas, las poblaciones evaluadas produjeron semillas llenas de aceptable calidad germinativa.

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Section: Discussionunclassified

CARACTERÍSTICAS REPRODUCTIVAS Y CALIDAD DE SEMILLA EN POBLACIONES FRAGMENTADAS DE Pinus chiapensis (MARTÍNEZ) ANDRESEN

et al. 2021

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“…; Sáenz‐Romero et al. ), (d) Pinus devoniana (also known as Pinus michoacana ), which develops a juvenile grass stage and provides some resistance to drought (1,600–2,450 m a.s.l. ; Sáenz‐Romero and Tapia‐Olivares ), and (5) Pinus oocarpa , which inhabits the lowest altitudinal limit of the pine–oak forest, and becomes interspersed with the tropical dry forests (1,100–1,600 m a.s.l.…”

Section: Introductionmentioning

confidence: 99%

“…), P. pseudostrobus (Sáenz‐Romero et al. ), P. devoniana (Sáenz‐Romero and Tapia‐Olivares ), and P. oocarpa (Sáenz‐Romero et al. ).…”

Section: Introductionmentioning

confidence: 99%

Suitable climatic habitat changes for Mexican conifers along altitudinal gradients under climatic change scenarios

Gómez‐Pineda

Sáenz‐Romero

Ortega‐Rodríguez

et al. 2019

Ecological Applications

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The high biodiversity of the Mexican montane forests is concentrated on the Trans‐Mexican Volcanic Belt, where several Protected Natural Areas exist. Our study examines the projected changes in suitable climatic habitat for five conifer species that dominate these forests. The species are distributed sequentially in overlapping altitudinal bands: Pinus hartwegii at the upper timberline, followed by Abies religiosa, the overwintering host of the Monarch butterfly at the Monarch Butterfly Biosphere Reserve, P. pseudostrobus, the most important in economic terms, and P. devoniana and P. oocarpa, which are important for resin production and occupy low altitudes where montane conifers merge with tropical dry forests. We fit a bioclimatic model to presence–absence observations for each species using the Random Forests classification tree with ground plot data. The models are driven by normal climatic variables from 1961 to 1990, which represents the reference period for climate‐induced vegetation changes. Climate data from an ensemble of 17 general circulation models were run through the classification tree to project current distributions under climates described by the RCP 6.0 watts/m2 scenario for the decades centered on years 2030, 2060 and 2090. The results suggest that, by 2060, the climate niche of each species will occur at elevations that are between 300 to 500 m higher than at present. By 2060, habitat loss could amount to 46–77%, mostly affecting the lower limits of distribution. The two species at the highest elevation, P. hartwegii and A. religiosa, would suffer the greatest losses while, at the lower elevations, P. oocarpa would gain the most niche space. Our results suggest that conifers will require human assistance to migrate altitudinally upward in order to recouple populations with the climates to which they are adapted. Traditional in situ conservation measures are likely to be equivalent to inaction and will therefore be incapable of maintaining current forest compositions.

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“…Logistic growth function for total height was fit for each individual seedling, using PROC NLIN of SAS ( 2004) and the following model (SÁENZ-ROMERO et al, 2012b):…”

Section: Discussionmentioning

confidence: 99%

Clinal variation in Pinus hartwegii populations and its application for adaptation to climate change

et al. 2013

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In order to determine the genetic variation among populations of Pinus hartwegii along altitudinal gradients, and the possible adaptive decoupling due to climatic change, a common garden test was set up with 13 provenances collected along an altitudinal transect (3150 to 3750 masl; collection sites were every 50 m of altitudinal difference) from Pico de Tancítaro, Michoacán, west-central Mexico. The test evaluated trees aged 4.5 to 5.5 years, and contemporary and future (year 2030; six model-emission scenarios) climate variables were estimated. We found significant (P<0.005) differences among populations in total elongation, final seedling height, basal diameter, rate of elongation, dry weight of needles, branches and stem, total dry weight and first principal component. We found a significant association between population performance, expressed as first principal component values, and their climate, where the best climatic predictor was the frost free period (r2=0.90, P<0.0001). This result indicates that the patterning of genetic differentiation among populations is strongly associated with a climatic and altitudinal gradient. We propose a re-delineation of fixed climatic and altitudinal seed zoning for seed and seedling movement, based on intervals of 26 days of difference of frost free period: Zone 1, from 240 to 214 days of frost free period or 12 to 11°C or 3150 to 3350 masl; Zone 2, 214 to 188 days or 11 to 10°C or 3350 to 3550 masl; and Zone 3, 188 to 162 days or 10 to 9°C or 3550 a 3750 masl. Projecting at what altitude will occur the same frost free period values by year 2030, we suggested that populations should be shifted 400 m attitudinally upward, through a program of assisted migration, aiming to realign the populations to the climate for which they are adapted. Seedling deployment should use future (year 2030) fixed seed zones, with the same projected climatic interval values than contemporary climate, although at the following altitudinal limits: Zone 12030, from 3550 to 3750 masl; Zone 22030, 3750 to 3950 masl; and Zone 32030, 3950 to 4150 masl.

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ALTITUDINAL GENETIC VARIATION AMONG Pinus pseudostrobus POPULATIONS FROM MICHOACÁN, MÉXICO. TWO LOCATION SHADEHOUSE TEST RESULTS

Cited by 18 publications

References 16 publications

CARACTERÍSTICAS REPRODUCTIVAS Y CALIDAD DE SEMILLA EN POBLACIONES FRAGMENTADAS DE Pinus chiapensis (MARTÍNEZ) ANDRESEN

CARACTERÍSTICAS REPRODUCTIVAS Y CALIDAD DE SEMILLA EN POBLACIONES FRAGMENTADAS DE Pinus chiapensis (MARTÍNEZ) ANDRESEN

Suitable climatic habitat changes for Mexican conifers along altitudinal gradients under climatic change scenarios

Clinal variation in Pinus hartwegii populations and its application for adaptation to climate change

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