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Dive into the research topics where Juan Tun-Garrido is active.

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Featured researches published by Juan Tun-Garrido.


Animal Production Science | 2017

Sheep and goat browsing a tropical deciduous forest during the rainy season: why does similar plant species consumption result in different nutrient intake?

J. Ventura-Cordero; P. G. González-Pech; J.F.J. Torres-Acosta; C.A. Sandoval-Castro; Juan Tun-Garrido

During the rainy season, the tropical deciduous forest (TDF) supposedly represents an abundance of biomass for sheep and goats. Nevertheless, quantitative estimations of feed intake during the rainy season are lacking. This study investigated the feeding behaviour of sheep and goats in a TDF in Mexico and quantified their nutrient intake during the rainy season. Plant species (PS) consumed, size and weight of bites, and nutritional quality were determined by continuous bite monitoring through direct observation. Adult ewes (n = 3) and goats (n = 3) were observed in their grazing circuits (4 h/day) for 12 days during the rainy season. Sheep and goats consumed 61 PS and performed a similar median number of bites (1751 vs 2053 bites/day, respectively; P > 0.05). Although they shared 52.5% of the PS consumed, only seven PS contributed most of the dry matter intake (DMI) for sheep (96.7%) or goats (90.5%). Sheep consumed more grass than goats (79.8% vs 48.3% of their DMI, respectively), whereas goats ate more shrubs than sheep (30.0% vs 7.6% of their DMI, respectively). The diet ingested by goats included more polyphenols (P < 0.05) and a higher frequency of larger and heavier bites than sheep (P < 0.05). Sheep reached 61.3% and 57.7% of their metabolisable energy and crude protein maintenance requirements. Similarly, goats covered 63.3% of their metabolisable energy and 108.2% of crude protein requirement. Although the main ration of sheep and goats was composed of similar PS, their different feeding behaviour resulted in different macronutrient consumption.


Animal Production Science | 2017

Feed resource selection by Criollo goats browsing a tropical deciduous forest

J. Ventura-Cordero; P. G. González-Pech; C.A. Sandoval-Castro; J.F.J. Torres-Acosta; Juan Tun-Garrido

Goats browsing in a tropical deciduous forest (TDF) obtain a large proportion of their diet from a large number of plant species. Nevertheless, the goat’s feed resource selection has not been studied in such an ecosystem. This study aimed to determine whether goats browsing in a TDF display active feed resource selection. Two browsing sites were used (A = 2.2 ha and B = 2.6 ha). The effective availability (g) of all plant species available was measured for each site using 10 m × 20 m exclusion quadrants. Three non-pregnant adult goats (34.9 ± 2.4 kg liveweight) with browsing experience were observed using the continuous bite monitoring method to determine their respective dry matter intake. The selection of different plants was determined using the Jacobs’ selection index (JSI). The goats’ dry matter intake per day was 723 and 310.8 g for Sites A and B, respectively. At both browsing sites, the plant with the highest biomass availability was Gymnopodium floribundum (75.5% and 49.3% for Sites A and B, respectively). Nevertheless, the plant species most actively selected by goats were Eragrostis ciliaris at Site A (JSI = 0.99, P < 0.05) and Mimosa bahamensis at Site B (JSI = 0.96, P < 0.05). Some plant species were not consumed at Sites A and B (three and five species, respectively). In conclusion, feed resource selection was not associated with the biomass availability of the plants selected or refused. Goats were able to show active feed resource selection in the TDF, and this could change according to the characteristics of the browsing site.


Plant Ecology & Diversity | 2018

Spatial patterns of species diversity in sand dune plant communities in Yucatan, Mexico: importance of invasive species for species dominance patterns

Víctor Parra-Tabla; Cristopher Albor-Pinto; Juan Tun-Garrido; Diego Angulo-Pérez; Christian Barajas; Rigel Silveira; Juan Javier Ortiz-Díaz; Gerardo Arceo-Gómez

Background: Coastal ecosystems in Mexico remain understudied in spite of their ecological, economic and conservation value and are being impacted by human activities along the coast. Knowledge on spatial patterns of plant species distribution that helps preserve these fragile ecosystems is crucial. Aims: We evaluated differences in species richness, species diversity and species dominance patterns in 16 plant communities as well as the degree to which differences were driven by climatic conditions in sandy dunes in Yucatán. We evaluated the importance of invasive species in mediating patterns of species diversity and species dominance patterns. Results: We found wide variation in plant species richness, species diversity and species dominance patterns among communities that stems from broad climatic differences along dune systems. Invasive plants represent almost one-third of total species richness and seem to be drastically changing the species dominance patterns in these communities. Conclusions: Regional climatic differences along the Yucatán north coast seems to be a major driver of plant diversity and species composition. Our findings suggest that invasive plants have successfully colonised and spread along the coast over the past 30 years. Even though invasive species do not alter spatial patterns of species diversity, they are becoming more dominant with potential detrimental consequences for native plants.


PhytoKeys | 2018

Floristic affinities of the lowland savannahs of Belize and southern Mexico

Idalia Arely Canché-Estrada; Juan Javier Ortiz-Díaz; Juan Tun-Garrido

Abstract Environmental heterogeneity of Belize and southern Mexico savannahs as well as their geographical location suggest that these plant communities share floristic elements, making them conducive to a phytogeographical analysis. The aim of this study was to analyse the floristic affinities of nine savannahs of Belize and southern Mexico and to explain the similarities and differences amongst them. A binary data matrix containing 915 species was built based on the authors’ own collections and on nine floristic lists already published. A second data matrix, consisting of 113 species representing trees, was also used since most literature on neotropical savannahs has focused on this life form. In addition, the ten most species-rich families as well as the characteristic species present in more than five savannahs were analysed. Floristic similarities were calculated using the Jaccard index. Dendrograms obtained in both types of analysis showed clusters with low similarity values, corresponding to geographic locations formed by the savannahs of Belize-Tabasco and the Yucatan Peninsula. The floristic affinities of the savannahs may be explained in terms of heterogeneity in climate and physiography. The Yucatan Peninsula and Belize-Tabasco groups have differences in climate type and the amount of rainfall. In addition, the Yucatan Peninsula savannahs are established at the bottom of karstic valleys, while the Belize and Tabasco savannahs develop on extensive flatlands. The savannahs of Oaxaca have the same climate type and amount of rainfall as those of the Yucatan Peninsula but they are distributed along peaks and the slopes of shale hills. Fabaceae and Poaceae mainly dominated the local floras with 121 and 116 species each; remarkably, Melastomataceae was absent in the Yucatan Peninsula and Oaxaca. Nine species occurred in five to seven savannahs, confirming that they are widespread in both Belize and southern Mexico, and the Neotropics. Geographic location and floristic affinities of the nine savannahs support, to some extent, three different biogeographic provinces.


Small Ruminant Research | 2015

Feeding behavior of sheep and goats in a deciduous tropical forest during the dry season: The same menu consumed differently

P. G. González-Pech; J.F.J. Torres-Acosta; C.A. Sandoval-Castro; Juan Tun-Garrido


Revista Mexicana De Biodiversidad | 2014

Flora fanerogámica de dos enclaves de sabana de la península de Yucatán, México

Juan Javier Ortiz-Díaz; Juan Tun-Garrido; Itziar Arnelas-Seco; Gerardo García-Gil


Polibotánica | 2013

Diversidad y origen geográfico del recurso vegetal en los huertos familiares de Quintana Roo, México

Jesús Martín Kantún-Balam; José Salvador-Flores; Juan Tun-Garrido; Jorge Navarro-Alberto; Luis Arias-Reyes; Jaime Martínez-Castillo


Archive | 2018

Figure 1 from: Canché-Estrada IA, Ortiz-Díaz JJ, Tun-Garrido J (2018) Floristic affinities of the lowland savannahs of Belize and southern Mexico. PhytoKeys 96: 47-56. https://doi.org/10.3897/phytokeys.96.20097

Idalia Arely Canché-Estrada; Juan Javier Ortiz-Díaz; Juan Tun-Garrido


Revista De Biologia Tropical | 2017

Diversity, structure and floristic affinities of a temporarily flooded forest of the Yucatan Peninsula

Cristopher Albor-Pinto; Juan Tun-Garrido; Juan Javier Ortiz-Díaz


Revista Mexicana De Biodiversidad | 2016

Primer registro de Schultesia heterophylla (Gentianaceae) para la península de Yucatán

Cristopher Albor-Pinto; Juan Javier Ortiz-Díaz; Geovani Palma-Pech; Juan Tun-Garrido

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Juan Javier Ortiz-Díaz

Universidad Autónoma de Yucatán

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Gerardo García-Gil

Universidad Autónoma de Yucatán

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C.A. Sandoval-Castro

Universidad Autónoma de Yucatán

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Claudia Várguez-Vázquez

Universidad Autónoma de Yucatán

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Cristopher Albor-Pinto

Universidad Autónoma de Yucatán

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J.F.J. Torres-Acosta

Universidad Autónoma de Yucatán

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P. G. González-Pech

Universidad Autónoma de Yucatán

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Geovani Palma-Pech

Universidad Autónoma de Yucatán

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J. Ventura-Cordero

Universidad Autónoma de Yucatán

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