Características estructurales y demográficas de Juniperus deppeana Steud. en dos localidades del estado de Tlaxcala

Mier, Laura Gabriela Herrerías; Pascual, Cecilia Carmen Nieto de

doi:10.29298/rmcf.v11i61.618

Cited by 5 publications

(2 citation statements)

References 7 publications

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“…Both can be based on the age, size, or life stage of individuals in a population (Rabinovich 1980;Gotelli 2008;Carey and Roach 2020). Static life tables are commonly used to study the dynamics of long-lived individuals since it is impractical to wait until all individuals die to assess a population (Hegazy et al 2008;Herrerías and Nieto de Pascual 2020).…”

Section: Introductionmentioning

confidence: 99%

Abies hidalgensis: Effect of forest extraction on a threatened and microendemic species

Rosales-Islas

Octavio‐Aguilar

2023

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Demography is a key area for obtaining information for monitoring and conserving threatened plants. Abies hidalgensis is a microendemic species of Hidalgo state, listed as threatened in the category VuD2 in the IUCN Red List but not mentioned in the Mexican regulation NOM-059-SEMARNAT due to low existing information. The aim of this research was to evaluate the effect of forest extraction on demographic aspects of Abies hidalgensis. Individuals over 1.5 m tall and with diameters at chest height over 2.5 cm were censused in nine populations with different management conditions. Seedlings were counted in 0.1 ha circles, and their age was registered. Taller individuals were grouped with a cluster analysis and contrasted between extraction treatments by a generalized discriminant function analysis. These groups were used to build static life tables showing fecundity by stage, and the individual numbers from each treatment and population were resampled with a Markovian 10,000-step bootstrap procedure to calculate a stochastic population growth rate. The seedling data was also contrasted by a generalized discriminant function analysis. An age estimation model was fitted to determine age based on diameters. Forest exploitation causes loss of the biggest trees, leading to a notable change of the population structure with an increase of seedlings, loss of fecundity, dominance of small plants, average age decrease, and a decrease in the stochastic population growth rate. However, even when the nine populations are growing, management activities generate a greater risk of mortality in the initial stages and loss of fertile adults.

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Section: Introductionmentioning

confidence: 99%

Abies hidalgensis: Effect of forest extraction on a threatened and microendemic species

Rosales-Islas

Octavio‐Aguilar

2023

Preprint

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“…Furthermore, given their presence in the agriculture and urban areas, we expected alien plants to be strongly integrated into the interaction networks ( Maruyama et al, 2016 ; Parra-Tabla et al, 2019 ), to the point that they may have a similar contribution to network structure as native plant species. In Mexico, juniper forests occupy approximately 0.15% of the national territory, yet ecological knowledge of this forest type and its role in biodiversity conservation is precarious ( Aguirre-Calderón, 2015 ; Herrerías Mier & Nieto del Pascual, 2020 ). Finding out the impact of the conversion of this native habitat on the interacting communities of butterflies and their plants will be a first step in highlighting the need for their study and conservation.…”

Section: Introductionmentioning

confidence: 99%

Impacts of land use change on native plant-butterfly interaction networks from central Mexico

Muñoz-Galicia,

Lara,

Castillo-Guevara

et al. 2023

PeerJ

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Background Land use change is a key catalyst of global biodiversity loss and ecosystem degradation. Deforestation and conversion of natural habitats to agricultural or urban areas can profoundly disrupt plant-flower visitor interactions by altering their abundances and distribution. Yet, specific studies analyzing the effects of land use change on the structure of networks of the interactions between particular groups of flower visitors and their plants are still scarce. Here, we aimed to analyze how converting native habitats affects the species composition of butterfly communities and their plants, and whether this, in turn, leads to changes in the structure of interaction networks in the modified habitats. Methods We performed bi-monthly censuses for a year to record plant-butterfly interactions and assess species diversity across three habitat types, reflecting a land-use change gradient. From original native juniper forest to urban and agricultural zones in central Mexico, one site per land use type was surveyed. Interactions were summarized in matrices on which we calculated network descriptors: connectance, nestedness and modularity. Results We found highest butterfly diversity in native forest, with the most unique species (i.e., species not shared with the other two sites). Agricultural and urban sites had similar diversity, yet the urban site featured more unique species. The plant species richness was highest in the urban site, and the native forest site had the lowest plant species richness, with most of the plants being unique to this site. Butterfly and plant compositions contrasted most between native forest and modified sites. Network analysis showed differences between sites in the mean number of links and interactions. The urban network surpassed agriculture and native forest networks in links, while the native forest network had more interactions than the agriculture and urban networks. Native plants had more interactions than alien species. All networks exhibited low connectance and significant nestedness and modularity, with the urban network featuring the most modules (i.e., 10 modules). Conclusions Converting native habitats to urban or agricultural areas reshapes species composition, diversity and interaction network structure for butterfly communities and plants. The urban network showed more links and modules, suggesting intricate urban ecosystems due to diverse species, enhanced resources, and ecological niches encouraging interactions and coexistence. These findings emphasize the impacts of land use change on plant-butterfly interactions and the structure of their interaction networks.

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Atributos estructurales y hábitat de Juniperus jaliscana en Talpa de Allende, Jalisco, México

et al. 2023

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Antecedentes: El conocimiento de los atributos estructurales y el hábitat de las especies son fundamentales para evaluar su estado de conservación y proponer acciones para su conservación y manejo. Preguntas: ¿Cuáles son los atributos estructurales de la poblacional de J. jaliscana, las características de su hábitat y los factores ambientales que podrían estar influyendo en su distribución y abundancia? Sitio y periodo de estudio: El muestreo de campo se realizó en poblaciones de J. jaliscana en el ejido El Cuale, municipio de Talpa de Allende, Jalisco, México, en julio de 2019. Métodos: En parcelas de 500 m2 se determinaron los atributos estructurales de la poblacional de J. jaliscana y a través de un RDA se evaluó cuales factores ambientales podrían influir en su distribución y abundancia. Se describió la composición y estructura de toda la comunidad vegetal. Resultados: Juniperus jaliscana registró 385 ind. ha-1 y un área basal de 8.98 m2 ha-1. Las variables con mayor influencia sobre su abundancia y distribución fueron la incidencia de incendios y el pastoreo. Se registraron 119 especies, 94 géneros y 52 familias. Psidium salutare se registró por primera vez para el estado de Jalisco y se describió como especie nueva para la ciencia a Prionosciadium tamayoi. Conclusiones: Juniperus jaliscana concentró su población en categorías diamétricas pequeñas. Los factores ambientales con mayor influencia sobre su distribución y abundancia fueron los incendios, pastoreo y condiciones de ambientes secos. Juniperus jaliscana comparte hábitat con especies endémicas al occidente de México.

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Características estructurales y demográficas de Juniperus deppeana Steud. en dos localidades del estado de Tlaxcala

Cited by 5 publications

References 7 publications

Abies hidalgensis: Effect of forest extraction on a threatened and microendemic species

Abies hidalgensis: Effect of forest extraction on a threatened and microendemic species

Impacts of land use change on native plant-butterfly interaction networks from central Mexico

Atributos estructurales y hábitat de Juniperus jaliscana en Talpa de Allende, Jalisco, México

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