The role of evapotranspiration on the foliar functional distribution of 28 Quercus species from Mexico and Spain

Riva, Enrique G. de la; Arenas‐Navarro, Maribel; Villar, Rafael; Oliva, Felipe García; Oyama, Ken

doi:10.7818/ecos.1803

Cited by 2 publications

(7 citation statements)

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“…The cluster analysis identified eight groups, with a clear dominance of several Pinus and Quercus species, that we classify according to their IVI and floristic composition into three forest types (i.e., oak, pine-oak and montane-cloud forests) occurring along two main environmental gradients (nutrient soil conditions , and water availability, as measured by the UNEP aridity index). The oak forest showed a floristic composition dominated by deciduous oaks, with the presence of drought tolerant species or xeric affinity registered in other oak forest (Aguilar-Romero et al 2016, de la Riva et al 2019. The pine-oak forest showed a floristic composition dominated by a high diversity of red oaks and pines, with the presence of several temperate species typical of Mexican temperate forest (Challenger & Caballero 1998, Rzedowski 2006.…”

Section: Discussionmentioning

confidence: 99%

“…In this region, the most common forest types are deciduous forest, oak forest, pine-oak forest, cloud forest, fir forest and its different transition zones (Cuevas-Guzmán et al 2010, Velázquez-Ruiz et al 2012. This floristic region is considered one of the most important centers of floristic endemism (Hernández-López 1995, González-Gallegos & Castro-Castro 2012, Vargas-Rodríguez et al 2010, de la Riva et al 2019, and according to the Mexican Biodiversity Commission (CONABIO) belongs to a priority hydrological basin and a priority land region due to its high biological value in Mexico (Arriaga-Cabrera et al 2000, Arriaga-Cabrera et al 2002.…”

Section: Methodsmentioning

confidence: 99%

“…A canonical correspondence analysis (CCA) was conducted to relate community composition with the environmental variables (de Bello et al 2012, Shen et al 2015. We performed 999 permutations to evaluate the significance of the CCA model.…”

Section: Methodsmentioning

confidence: 99%

“…McCain & Grytnes (2010) described four main patterns of elevational species richness: decreasing, low plateau, low plateau with a mid-elevational peak and mid-elevational peaks. The decreasing and the mid-elevational or "hump-shaped" patterns are the most frequently reported for plants (Colwell et al 2004, Kessler et al 2011, de Bello et al 2012.…”

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confidence: 99%

“…The assembly of plant communities is influenced by several processes, such as historical diversification, environmental filtering, long-term dispersal and ecological interactions, among others (Götzenberger et al 2011, Zobel 2016. Environmental factors impose filters on species survival, so that only those species that possess the proper attributes to face them can become part of the community (Webb et al 2002, Götzenberger et al 2011, de Bello et al 2012. Environmental filters act at different spatial scales; at the local scale, plant species respond to soil pH, moisture and nutrients (Grime 1979, Pausas & Austin 2001, while at the regional scale climatic variables are more relevant (Currie 1991, Götzenberger et al 2011, de Bello et al 2012.…”

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Environmental filters determine the distribution of tree species in a threatened biodiversity hotspot in western Mexico

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Background: Analyzing interactions between vegetation and environmental factors at regional scales provide information for the understanding of species assemblages. Hypotheses: Environmental restrictions at higher elevations produce a decreasing species richness pattern along an elevational gradient and the climatic variables related to temperature and precipitation are the main filters of species distribution. Objectives: (1) To identify the different assemblages of tree species occurring in a biodiversity hotspot; (2) to analyze the pattern of tree species richness along an elevational gradient; and (3) to analyze the environmental filters that determine the species distribution. Study site: Serranías Meridionales of Jalisco in western Mexico. Period of study: 2016-2018. Methods: Thirty-three rectangular 0.1 ha plots were established for vegetation and environmental characterization. Cluster and canonical correspondence analyses were conducted to analyze tree species composition. We defined three groups of variables (climatic, relief and soil) to evaluate the influence of environmental filters. We used generalized linear models to assess the contribution of each group to the spatial variation in species richness. Results: A total of 63 tree species were recorded. The cluster analysis defined eight groups within three forest types. The species richness showed a hump-shaped pattern along the elevational gradient and the climatic and soil variables explained a considerable amount of variation in the species richness. Conclusions: The tree species richness in the Serranías Meridionales de Jalisco is dominated by a striking number of Pinus and Quercus species. This biodiversity hotspot is an important site for the understanding of tree ecological diversification in Mexico.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Environmental filters determine the distribution of tree species in a threatened biodiversity hotspot in western Mexico

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Leaf Habit and Stem Hydraulic Traits Determine Functional Segregation of Multiple Oak Species along a Water Availability Gradient

Arenas‐Navarro

García‐Oliva

Terrazas

et al. 2020

Forests

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Oaks are a dominant woody plant genus in the northern hemisphere that occupy a wide range of habitats and are ecologically diverse. We implemented a functional trait approach that included nine functional traits related to leaves and stems in order to explain the species coexistence of 21 oak species along a water availability gradient in a temperate forest in Mexico. This particular forest is characterized as a biodiversity hotspot, with many oak species including some endemics. Our main aim was to investigate whether the different oak species had specific trait associations that allow them to coexist along an environmental gradient at regional scale. First, we explored trait covariation and determined the main functional dimensions in which oaks were segregated. Second, we explored how environmental variation has selected for restricted functional dimensions that shape oak distributions along the gradient, regardless of their leaf life span or phylogeny (section level). Third, we quantified the niche overlap between the oak functional spaces at different levels. The analyzed species showed three functional dimensions of trait variation: a primary axis related to the leaf economic spectrum, which corresponds to the segregation of the species according to leaf habit; a second axis that reflects the stem hydraulic properties and corresponds to species segregation followed by phylogenetic segregation, reflecting some degree of trait conservatism, and a third axis, represented mainly by leaf area and plant height, that corresponds to species segregation. Finally, our findings indicated that the functional space measured with leaf traits and stem traits such as hydraulic capacity was integrally linked to niche differentiation. This linkage suggests that the earliest mechanism of species segregation was related to habitat suitability and that the stem hydraulic trade-off reflects differences between phylogenetic sections; these traits may promote coexistence between distantly related oak species.

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The role of evapotranspiration on the foliar functional distribution of 28 Quercus species from Mexico and Spain

Abstract: Autores. Editado por la AEET. [Ecosistemas no se hace responsable del uso indebido de material sujeto a derecho de autor]

Cited by 2 publications

References 40 publications

Environmental filters determine the distribution of tree species in a threatened biodiversity hotspot in western Mexico

Environmental filters determine the distribution of tree species in a threatened biodiversity hotspot in western Mexico

Leaf Habit and Stem Hydraulic Traits Determine Functional Segregation of Multiple Oak Species along a Water Availability Gradient

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