Geoecological Investigations on the Timberline of Pico de Orizaba, Mexico

Lauer, Wilhelm; Klaus, Dieter

doi:10.2307/1550176

Cited by 55 publications

(41 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For example, extrapolation of eastern North American treeline southward from 44 ° N using our linear trend (Fig. 2), underestimates actual Mexican treeline (Lauer & Klaus 1975) by 600m. Within the temperate zone, Daubenmire (1954) and Wolfe (1979) both displayed treeline as a curvilinear function of latitude: the slope was gradual from 20 °N to ca.…”

Section: Analysis Of the Latitude-elevation Relationshipmentioning

confidence: 84%

The latitude-elevation relationship for spruce-fir forest and treeline along the Appalachian mountain chain

Cogbill¹,

1991

View full text Add to dashboard Cite

Spruce-fir forests extend along the Appalachian Mountains of eastern North America from 35 ° to 49 ° N.This montane vegetation differs from boreal spruce-In" forest in that it is dominated by Picea rubens, has a higher vascular species richness, has wind, rather than fire, dominated dynamics, and has a mean annual temperature above 2 ° C. Using field reconnaissance, remote sensing, and literature review we described and modeled the latitude-elevation relationship for Appalachian spruce-fir. The elevation of the sprucefir/deciduous forest ecotone decreases from 1,680 m at 35 ° N to 150 m at 49 ° N, while the elevation of treeline (spruce-fir/tundra ecotone) decreases from 1,480 m at 44 ° N to 550 m at 55 ° N. Linear regressions gave latitude-elevation relationships of -100 m/1 ° Latitude for the spruce-fir/deciduous forest ecotone and -8 3 m/1 ° Latitude for treeline. These values compare to literature reports of -5 4 to -230 m/1 ° Latitude and are most similar to values reported from eastern Asia. The latitude-elevation relationship for mean July temperature ( -94 to -121 m/1 ° Latitude) was more similar to the slopes of these ecotones than is the slope for mean annual temperature ( -170 to -220 m/1 ° Latitude). The spruce-fir/deciduous forest ecotone was correlated with a mean July temperature of approximately 17 ° C. Treeline was correlated with a mean July temperature of approximately 13 °C.

show abstract

Section: Analysis Of the Latitude-elevation Relationshipmentioning

confidence: 84%

The latitude-elevation relationship for spruce-fir forest and treeline along the Appalachian mountain chain

Cogbill¹,

1991

View full text Add to dashboard Cite

show abstract

“…Fire is a most signi®cant modulating agent at some tropical, subtropical and temperate zone treelines (Lauer and Klaus 1975;DeBenedetti and Parsons 1979;Beck et al 1986, Miehe andMiehe 1994;Rochefort et al 1994;Ellenberg 1996), but is not a climatic determinant (in the strict sense).…”

Section: Tissue Losses By Disturbancementioning

confidence: 99%

“…at ®re-controlled treelines, e.g. Lauer and Klaus 1975), which itself illustrates that treeline formation cannot universally be associated with a lack of viable diaspores (e.g. Griggs 1946;Oswald 1963;Clausen 1965;Norton and SchoÈ nenberger 1984;Grace and Norton 1990;Marchand 1991).…”

Section: Seedling Establishmentmentioning

confidence: 99%

A re-assessment of high elevation treeline positions and their explanation

1998

View full text Add to dashboard Cite

In this review I ®rst compile data for the worldwide position of climate-driven alpine treelines. Causes for treeline formation are then discussed with a global perspective. Available evidence suggests a combination of a general thermal boundary for tree growth, with regionally variable``modulatory'' forces, including the presence of certain taxa. Much of the explanatory evidence found in the literature relates to these modulatory aspects at regional scales, whereas no good explanations emerged for the more fundamental global pattern related to temperature per se, on which this review is focused. I hypothesize that the life form``tree'' is limited at treeline altitudes by the potential investment, rather than production, of assimilates (growth as such, rather than photosynthesis or the carbon balance, being limited). In shoots coupled to a cold atmosphere, meristem activity is suggested to be limited for much of the time, especially at night. By reducing soil heat¯ux during the growing season the forest canopy negatively a ects root zone temperature. The lower threshold temperature for tissue growth and development appears to be higher than 3°C and lower than 10°C, possibly in the 5.5±7.5°C range, most commonly associated with seasonal means of air temperature at treeline positions. The physiological and developmental mechanisms responsible have yet to be analyzed. Root zone temperature, though largely unknown, is likely to be most critical.

show abstract

“…El clima es típico de las montañas próximas al límite norte del neotrópico, caracterizado por la notable fluctuación diaria de la temperatura, presenta un régimen de lluvias de verano (de abril a octubre), con influencia de monzón, con menos de 5% de precipitación invernal, con verano fresco y largo, isotermal y con marcha de temperatura tipo Ganges. El promedio anual de temperatura es del orden de 5° a 12° C. El gradiente regional de temperatura es de alrededor de 0.57° C por cada 100 m de altitud, valor registrado por Lauer y Klaus (1975) en el volcán Pico de Orizaba. …”

Section: Localización Y Descripción Del áRea De Estudiounclassified

Fitosociología y fitodiversidad de la Laguna Quila, Parque Nacional Lagunas de Zempoala, México

Islebe¹,

Almeida-Leñero

Cleef³

et al. 2003

Acta Bot. Mex.

View full text Add to dashboard Cite

RESUMENSe efectuaron 59 levantamientos fitosociológicos en la Laguna Quila, del Parque Nacional "Lagunas de Zempoala", México, según el método Zürich-Montpellier. Se identificaron y describieron 11 comunidades, separadas en una fase "acuática" y en una "helofítica". Se encontró un gradiente de profundidad con dirección norte-sur y se observó una continua desecación del cuerpo de agua. Se elaboró un mapa de vegetación en escala 1: 1900. Se enlistan un total de 21 familias, 33 géneros y 41 especies de plantas vasculares. Las familias mejor representadas son Cyperaceae con siete especies y Ranunculaceae con cuatro. Desde el punto de vista fitogeográfico, a nivel genérico el componente templado alcanza 65%, el cosmopolita 30%, mientras que el tropical 5%. Las especies del área estudiada tienen distribución amplia, presentándose en lagunas e hidroseries de México y de zonas templadas de América. Las comunidades acuáticas están desapareciendo muy rápidamente en todo el país; por lo que es fundamental entender la dinámica y el manejo adecuado de este recurso. A fin de proteger la laguna se recomienda controlar urgentemente el bombeo de agua y reducir el pastoreo así como eliminar otras actividades que la afecten indirectamente.Palabras clave: conservación, fitodiversidad, fitogeografía, fitosociología, Laguna Quila, México. ABSTRACTA phytosociological study of 59 relevés was carried out at Laguna Quila, National Park Lagunas de Zempoala, México, using the Zürich-Montpellier approach. Eleven communities were identified and described. A distinction was made between a submerged Acta Botanica Mexicana (2003), 65: 61-82 62 and a helophytic hydroseral vegetation. A pronounced humidity gradient was identified in a northsouth direction, and also a continuous desiccation was observed. A vegetation map scale 1:1900 is included. 21 families of vascular plants including 41 species and 33 genera have been identified. Families best represented include Cyperaceae with seven species and Ranunculaceae with four species. Phytogeographical analysis on the generic level revealed that the temperate component reached 65%, the cosmopolitan 30% and the tropical 5%. The species of Laguna Quila have a wide distribution in Mexican hydroseries and elsewhere in temperate America. Aquatic and semi-aquatic communities are vanishing rapidly in Mexico, and it is important to understand the dynamics for adequate management of this natural resource. In order to protect this lake it is recommended to control the water extraction of the laguna, to exclude cattle and other activities who can affect indirectly Laguna Quila.

show abstract

Geoecological Investigations on the Timberline of Pico de Orizaba, Mexico

Cited by 55 publications

References 9 publications

The latitude-elevation relationship for spruce-fir forest and treeline along the Appalachian mountain chain

The latitude-elevation relationship for spruce-fir forest and treeline along the Appalachian mountain chain

A re-assessment of high elevation treeline positions and their explanation

Fitosociología y fitodiversidad de la Laguna Quila, Parque Nacional Lagunas de Zempoala, México

Contact Info

Product

Resources

About