Changes in the Potential Distribution of <i>Vanilla planifolia</i> Andrews under Different Climate Change Projections in Mexico

Vanilla planifolia is the most widely cultivated species for obtaining natural vanilla. In Mexico, vanilla production has decreased due to negative effects of climate change. We evaluate the current, potential, and future of vanilla cultivation areas in Mexico using bioclimatic models with distinct climate change scenarios (intermediate emissions, temperature rise of 1.1 to 2.6 °C, and high emissions from 2.6 to 4.8 °C, to 2050 and 2070), in order to understand the magnitude of future distribution changes and propose future management strategies. We found that the areas with greatest potential for establishment of V. planifolia are northern Veracruz state bordering the state of Puebla (the Totonacapan region) and northeast Oaxaca state. In the models, the most relevant environmental variable were mean temperature and precipitation of the driest quarter. The average projections for 2050 and 2070 show a progressive reduction in the potential area for the species (−1.6 and −17.3%). However, the Totonacapan region maintains the largest ideal cultivation area, while that of northeast Oaxaca is reduced by 50%. These results show the need to redesign the strategies of agricultural production of vanilla, through sustainable and climate-smart agricultural production strategies as well as a national strategy for conservation of genetic diversity

Changes in the Potential Distribution of Vanilla planifolia Andrews under Different Climate Change Projections in Mexico

Vanilla&nbsp;planifolia is the most widely cultivated species for obtaining natural vanilla. In Mexico, vanilla production has decreased due to negative effects of climate change. We evaluate the current, potential, and future of vanilla cultivation areas in Mexico using bioclimatic models with distinct climate change scenarios (intermediate emissions, temperature rise of 1.1 to 2.6 &deg;C, and high emissions from 2.6 to 4.8 &deg;C, to 2050 and 2070), in order to understand the magnitude of future distribution changes and propose future management strategies. We found that the areas with greatest potential for establishment of V. planifolia are northern Veracruz state bordering the state of Puebla (the Totonacapan region) and northeast Oaxaca state. In the models, the most relevant environmental variable were mean temperature and precipitation of the driest quarter. The average projections for 2050 and 2070 show a progressive reduction in the potential area for the species (&minus;1.6 and &minus;17.3%). However, the Totonacapan region maintains the largest ideal cultivation area, while that of northeast Oaxaca is reduced by 50%. These results show the need to redesign the strategies of agricultural production of vanilla, through sustainable and climate-smart agricultural production strategies as well as a national strategy for conservation of genetic diversity

Traditional Ecological Knowledge as a tool for biocultural landscape restoration in northern Veracruz, Mexico: a case study in El Tajín region

Zuelania guidonia is a tree species of cultural importance in Totonac society. This tree is a central element of the Los Voladores (the "flying men") pre-Hispanic ritual ceremony. However, the populations of Z. guidonia have decreased due to anthropogenic activity. This study aimed to codesign an agroforestry model for the recovery of Z. guidonia populations by combining scientific and traditional agroforestry knowledge at the El Tajín archaeological site in Veracruz, Mexico. We assessed the abundance of Z. guidonia and analyzed plant species richness and diversity in forest fragments. Species were classified according to plant regeneration modes (light-demanding and shade-tolerant) and to the local uses of secondary forests and conserved forest fragments. In addition, we worked collaboratively in a project that consisted of workshops, focus groups, open interviews, drawings, and field walks with community members. We studied a small population of Z. guidonia and recorded 116 woody species. Our findings showed that conserved forests were more diverse than secondary forests. Seventy-four percent of the species are useful to people. The Totonac people chose traditional vanilla plantations as a guiding model to shape their agroforestry system for restoring native vegetation. The results of our collaborative work revealed the Totonac extensive Traditional Ecological Knowledge and the need for the Voladores' group to strengthen alliances with other government and nongovernment organizations. They designed a model of a diversified traditional agroforestry vanilla system enriched with multipurpose plants as the outset of local well-being and regional agrobiodiversity restoration. This study reveals a distinct heterogenous land management scheme that provides the necessary conditions for preserving plant diversity, which will be used by local people for different purposes. We argue for studies that build on the relationship between scientific knowledge and Traditional Ecological Knowledge in transformed landscapes as a step forward for the long-term conservation of biocultural diversity

Putting vascular epiphytes on the traits map

1. Plant functional traits impact the fitness and environmental niche of plants. Major plant functional types have been characterized by their trait spectrum, and the environmental and phylogenetic imprints on traits have advanced several ecological fields. Yet, very few trait data on epiphytes, which represent almost 10% of vascular plants, are available. 2. We collated 76,561 trait observations for 2,882 species of vascular epiphytes and compared these to non-epiphytic herbs and trees to test hypotheses related to how the epiphytic habit affects traits, and if epiphytes occupy a distinct region in the global trait space. We also compared variation in traits among major groups of epiphytes, and investigated the coordination of traits in epiphytes, ground-rooted herbs and trees. 3. Epiphytes differ from ground-rooted plants mainly in traits related to water relations. Unexpectedly, we did not find lower leaf nutrient concentrations, except for nitrogen. Mean photosynthetic rates are much lower than in ground-rooted plants and lower than expected from the nitrogen concentrations. Trait syndromes clearly distinguish epiphytes from trees and from most non-epiphytic herbs. 4. Among the three largest epiphytic taxa, orchids differ from bromeliads and ferns mainly by having smaller and more numerous stomata, while ferns differ from bromeliads by having thinner leaves, higher nutrient concentrations, and lower water content and water use efficiency. 5. Trait networks differ among epiphytes, herbs and trees. While all have central nodes represented by SLA and mass-based photosynthesis, in epiphytes, traits related to plant water relations have stronger connections, and nutrients other than potassium have weaker connections to the remainder of the trait network. Whereas stem-specific density reflects mechanical support related to plant size in herbs and trees, in epiphytes it mostly reflects water storage and scales with leaf water content. 6. Synthesis. Our findings advance our understanding of epiphyte ecology, but we note that currently mainly leaf traits are available. Important gaps are root, shoot and whole plant, demographic and gas exchange traits. We suggest how future research might use available data and fill data gaps.ISSN:0022-047