Publications
Canopy openings in the Trans-Mexican Neovolcanic Belt: Characteristics, distribution, and conservation relevance in a biosphere reserve
Canopy openings in the Monarch Butterfly Biosphere Reserve (MBBR) are more prevalent in core zones and Abies religiosa forests, with higher densities observed on gentle slopes and at extreme elevations. These openings, often linked to pest outbreaks, reflect a mix of natural and human-induced disturbances, particularly within ejidos where timber harvesting is permitted. The study used NDVI data and Google Earth imagery to quantify these patterns, revealing critical areas for conservation prioritization—such as core zones and A. religiosa forests—to safeguard forest integrity and monarch butterfly overwintering habitat.
Evolution of Scientific Knowledge on the Monarch Butterfly Biosphere Reserve
Scientific research on the Monarch Butterfly Biosphere Reserve (MBBR) has shown sustained growth and thematic diversity, with 106 unique articles published between 1997 and 2025. Mexico leads in scientific output, followed by the United States and Canada, with the National Autonomous University of Mexico (UNAM) as the most productive institution. The study identified six key research domains: conservation and environmental management, socioeconomic aspects and governance, forest ecology, research methodologies, monarch butterfly biology, and climatic and hydrological phenomena. Notably, 2020 was the most productive year, while 2014 saw the highest citation count. This bibliometric analysis provides critical insights to inform conservation policies and strengthen sustainable management of the MBBR.
High resolution thermal and multispectral remote sensing for detecting devitalized trees in Monarch Butterfly Biosphere Reserve
Researchers successfully demonstrated the use of high-resolution thermal and multispectral drone imaging to distinguish between healthy, devitalized, and dead oyamel trees (Abies religiosa) within the core zone of Mexico's Monarch Butterfly Biosphere Reserve. By integrating normalized difference vegetation index (NDVI), surface temperature (ST), and temperature-vegetation dryness index (TVDI) with field data, the study achieved statistically significant differentiation among tree health levels. This marks the first application of such technology in Mexico for monitoring forest decline symptoms in oyamel populations, setting a methodological precedent for conservation efforts.
Modeling Tourist Affinities and Mediated Loyalty in Protected Natural Areas Using Fuzzy Logic
A novel application of fuzzy logic reveals that tourist loyalty in the Monarch Butterfly Biosphere Reserve is indirectly shaped by affinity-based visitor structures, with significant forgotten effects (up to 0.30) acting as mediating mechanisms between satisfaction, entertainment, relaxation, learning, perceived value, and revisit intention. The study identifies Generation X and postgraduate education levels as key factors polarizing visitor perceptions, challenging conventional models that assume direct loyalty construction. This research underscores the potential of fuzzy logic for strategic management in high-value ecological destinations, advocating for environmental edutainment models and diversified marketing tailored to differentiated visitor profiles.
Post-fire tree regeneration in mixed-conifer forests of the Monarch Butterfly Biosphere Reserve, Mexico
Post-fire tree regeneration in mixed-conifer forests of the Monarch Butterfly Biosphere Reserve, Mexico, exhibits high variability depending on elevation and fire history. Research reveals three distinct recruitment patterns: asynchronous establishment of Abies religiosa followed by Pinus pseudostrobus at higher elevations (3150 m), synchronous recruitment of both species at intermediate elevations (3100 m) following multiple fires, and exclusive regeneration of P. pseudostrobus and broad-leaved species at lower elevations (3050 m). The study analyzed tree-ring data from 258 trees across three sites to assess post-fire dynamics, finding that wet inter-annual periods did not significantly enhance recruitment. These findings underscore the complex interplay between fire, elevation, and species dominance, providing critical insights for forest management strategies in this ecologically significant region.
Using UAV (drone) technology to measure the dynamics of Abies religiosa (Kunth) Schltdl. & Cham. decline in the Monarch Butterfly Biosphere Reserve, Mexico, and its relationship to climate change
A significant decline in the health of Abies religiosa trees within Mexico's Monarch Butterfly Biosphere Reserve (MBBR) was linked to extreme drought conditions exacerbated by climate change. Using UAV technology, researchers detected a sharp drop in tree vigor—measured via NDVI and a new Monthly Dryness Index (MDI)—during a June 2023 heat wave (+2.7°C anomaly), with healthy trees plummeting from 37% to 18%. Regression models confirmed MDI's strong predictive power (R² ≥ 0.94) for tree vitality shifts, underscoring the species' vulnerability during dry seasons. This study highlights how drone-based remote sensing can track climate impacts on ecosystems in real time.
Altitudinal distribution, diversity, and conservation of pines and oaks in the Monarch Butterfly Biosphere Reserve, Mexico
Research reveals that the distribution and diversity of pine (Pinus) and oak (Quercus) species in Mexico's Monarch Butterfly Biosphere Reserve are significantly influenced by human activities, such as logging and agriculture. The study found that while alpha diversity did not vary with elevation, beta diversity exhibited an inverted hump pattern at both high and low elevations, likely due to anthropogenic disturbances. Pinus pseudostrobus and Quercus laurina emerged as the dominant species, with the least abundant species showing the most restricted geographic ranges. To analyze these patterns, scientists established six elevation transects (2,250–3,300 m above sea level) with 32 points spaced 150 meters apart, recording 25 trees per site with a diameter at breast height of at least 10 cm. This work underscores the need for targeted conservation strategies to preserve the biodiversity and ecosystem services provided by these crucial tree species.
Expansion of avocado monoculture threatens the overwintering habitat of monarch butterflies in central Mexico
By 2024, avocado monoculture had encroached upon 1345 ha of Mexico’s Monarch Butterfly Biosphere Reserve—337 ha of it former pine-oak forest—threatening the overwintering habitat of migratory monarch butterflies. Modeling under current and future climate scenarios (low- and high-emission) projects that suitable avocado cropping area will rise from 5076 ha today to 10 395 ha by 2070, shifting upslope and imperiling nectar sources while increasing pesticide use. Although sacred fir and mixed-conifer forests remain intact for now, their long-term viability hinges on curbing monoculture expansion and adopting sustainable avocado practices.
Hydrothermally Altered Rocks and Their Implications for Debris Flow Generation in the Monarch Butterfly Biosphere Reserve, Mexico
Hydrothermally altered andesitic breccia with significantly weakened geomechanical properties—exhibiting a compressive strength of just 0.47 ± 0.05 MPa—was identified as the critical factor triggering debris flows in the Canoas microbasin within Mexico's Monarch Butterfly Biosphere Reserve. Unlike unaltered andesite (36.26 ± 18.62 MPa), the altered rock displays soil-like characteristics, high clay and silt content, and susceptibility to saturation collapse during heavy rainfall. Fieldwork and petrographic analysis revealed extensive replacement of phenocrysts by sericite, kaolin, iron oxides, and clays, underscoring hydrothermal alteration as a key control for slope instability in volcanic regions. These findings provide critical insights for geological risk management in mountainous areas.
Monarch butterfly biosphere reserve: antecedent dimensions of loyalty in an environment of co-creation of experiences
A study on the Monarch Butterfly Biosphere Reserve reveals that visitor satisfaction and commitment to the destination are critical for fostering loyalty, with experience value playing a pivotal role in enhancing satisfaction. The research analyzed 316 questionnaires from tourists using SPSS 24 and IBM SPSS Amos 28, demonstrating that co-creation of experiences significantly influences behavioral intentions such as revisiting and recommending the site. This novel analysis bridges gaps in understanding visitor behavior in biosphere reserves, offering actionable insights for destination management and marketing strategies.
Protecting forests, losing trees: the role of community involvement
Despite its protected status, nearly half of the Monarch Butterfly Biosphere Reserve (MBBR) experienced forest degradation after conservation decrees, with pre-emptive clearing by communities contributing to deforestation. However, later periods saw forest recovery driven by payment for environmental services and community participation. The study, using multi-temporal data including aerial photographs and satellite imagery, found that illegal logging reduced essential fir forests by 43.3%, highlighting the critical role of community involvement in mitigating environmental impacts and ensuring conservation success.
Sanitary Logging in the Monarch Butterfly Biosphere Reserve: One Problem, One Legislation but Different Criteria and Different Treatments
A stark discrepancy exists in the management of bark beetle outbreaks within the Monarch Butterfly Biosphere Reserve, driven by differing criteria and treatments despite shared federal legislation. While Michoacán reports a high incidence rate of 41 outbreaks per km²—triggered even by a single infested tree—Estado de México's stricter threshold (three or more trees) results in just 1.5 outbreaks per km². This study, employing qualitative analysis through 21 semi-structured interviews, reveals that the differences stem from local administrative and technical procedures, exposing potential legal inadequacies. The findings underscore the need for unified, conservation-focused strategies to address bark beetle management, rather than relying solely on sanitary logging, which may be influenced by non-conservation interests.
Terrestrial Laser Scanning for Estimating the Volume and Biomass of Coniferous Stems in the Mariposa Monarca Biosphere Reserve, Mexico
Terrestrial laser scanning (TLS) emerges as a powerful, non-destructive tool for accurately estimating tree volume and biomass, offering a significant advancement over traditional methods that are labor-intensive and often destructive. A study in the Monarch Butterfly Biosphere Reserve (MBBR), Mexico, demonstrated that TLS-derived stem volume estimates (Vol_TLS) closely matched those from predictive models based on destructive sampling, with no significant differences found. The relationship between Vol_TLS and a model-based volume (Vol_TModel) showed an exceptionally strong fit (R² = 0.97, RMSE = 0.351 m³), outperforming another model comparison (R² = 0.93, RMSE = 0.537 m³). This validation highlights TLS as a reliable alternative for forest biomass assessment, particularly in ecologically sensitive areas like the MBBR, where conservation is paramount.
"Living in the time of the butterfly:" Engaging more-than-human temporalities to rethink biodiversity conservation
Indigenous Jñato and Hñähñu (Mazahua and Otomi) peoples' ecological narratives challenge linear conceptions of time, revealing cyclical multispecies temporalities that operate through reciprocal relations between humans, plants, water spirits, and witches. This study, conducted over multiple years through historical and ethnographic research in Mexico's Monarch Butterfly Biosphere Reserve, demonstrates how 'deep time' perspectives—rooted in Indigenous knowledge—can enrich biodiversity conservation by centering relational, more-than-human political ecologies. The findings highlight the power-laden nature of these temporalities, embedded within complex political economies and uneven knowledge production, which the authors term 'the time of the butterfly.' This work urges conservation scholars to reconsider epistemological assumptions about time and the Anthropocene, offering a framework that integrates Indigenous worldviews with ecological practice.
Dendrogeomorphological analysis of a debris flow in the Monarch Butterfly Biosphere Reserve, central Mexico
A dendrogeomorphological analysis reveals that the debris flow event in the Monarch Butterfly Biosphere Reserve, central Mexico, in February 2010 exhibited greater intensity in its transport zone. Researchers identified three types of growth anomalies—traumatic resin ducts, growth suppression, and growth releases—in Abies religiosa trees, which provided spatio-temporal data on the debris flow activity. The study utilized precipitation records from two meteorological stations, high-resolution geomorphological mapping via Unmanned Aerial Vehicle imagery, and dendrochronological sampling of 98 trees (125 cores) to generate a chronology. This approach demonstrates the potential of dendrogeomorphological techniques in understanding debris flow dynamics in intertropical montane environments, particularly where data on mass movement processes is scarce.
Establishing monarch butterfly overwintering sites for future climates: Abies religiosa upper altitudinal limit expansion by assisted migration
Research demonstrates that expanding the range of Abies religiosa (oyamel) to higher elevations is feasible, offering potential new overwintering sites for the Monarch butterfly under future climate conditions. The study found acceptable survival rates (44-68%) at elevations up to 4000 meters, though growth was limited at extreme sites. By analyzing transfer effects and environmental factors like annual dryness index, scientists projected that shifting populations by approximately 500 meters upward could mitigate the impacts of a 2.3°C increase in mean annual temperature expected by 2060. These findings suggest that establishing A. religiosa stands at 3600 and 3800 meters could serve as future overwintering habitats, though survival and growth would be lower than current conditions.
Local adaptation of Pinus leiophylla under climate and land use change models in the Avocado Belt of Michoacán
Research identifies the Monarch Butterfly Biosphere Reserve and surrounding eastern regions of Michoacán's Avocado Belt as critical conservation priorities for Pinus leiophylla, a tree species threatened by climate change and land use conversion. Using landscape genomics, scientists analyzed 3660 SNPs to pinpoint genetic adaptations across 19 localities, revealing that central-eastern areas face heightened vulnerability to climate shifts while western regions suffer from avocado orchard expansion. The study also highlights the potential of assisted gene flow strategies to mitigate these threats and emphasizes maintaining connectivity in forest patches, particularly in eastern zones. This work provides a robust framework for assessing tree population responses to dual anthropogenic pressures.
Local Perception of Traditional and Avocado Crops as Ecosystem Services in the Mariposa Monarch Biosphere Reserve
Local perceptions of traditional and avocado crops as ecosystem services vary significantly within the Monarch Butterfly Biosphere Reserve, influenced by daily activities, livelihoods, and proximity to protected zones. The study found contrasting feelings toward these crops, with avocado monocultures—expanding rapidly at the expense of native forests—often viewed negatively due to their environmental impact. Traditional crops, meanwhile, are associated with more sustainable practices and positive ecological outcomes. These findings highlight the complex interplay between human livelihoods and ecosystem conservation, offering critical insights for inclusive management strategies that balance local needs with biodiversity protection.
Sustainability of the community model of avocado production in the Monarch Butterfly Biosphere Reserve, Michoacán, México
A recent study reveals that the Community Model of Avocado Production (CMAP) in five indigenous communities within Mexico's Monarch Butterfly Biosphere Reserve shows promise for sustainable avocado cultivation without compromising forest conservation. The research, conducted through 42 interviews with producers and using a sustainability framework, identified critical points across environmental, economic, and social dimensions. While the CMAP supports local employment and land ownership, its economic viability is hindered by factors such as low profitability and high yield loss to pests. However, with targeted economic support for sustainable practices, the model could enhance livelihoods while preserving the reserve's ecological integrity.
The Many Care Worlds a Butterfly Crosses
This study reveals the contrasting care practices for monarch butterflies, highlighting tensions between northern conservation efforts led by volunteers and southern approaches rooted in Indigenous and mestizo communities. The research demonstrates that while northern conservation relies on voluntary habitat creation and economic contributions, southern residents experience this as a top-down imposition, emphasizing forest relations instead. Through ethnographic data, the study explores how these differing care worlds intersect with colonial dynamics, illustrating distinct perceptions of urgency in conserving nature. It contributes to the 'one planet, many worlds' debate by examining how a disappearing butterfly confronts and constitutes different conservation ideologies.
Biodiversity of riparian vegetation under a management gradient in the Monarch Butterfly Biosphere Reserve, Mexico
Riparian vegetation within the Monarch Butterfly Biosphere Reserve (MBBR) exhibits high biodiversity and conservation value, particularly in core and buffer zones. A study analyzing 15 sites across land-use gradients revealed that while species richness and alpha diversity were consistent, beta diversity varied significantly with human disturbance. The research identified 108 native species, with only 2% exotic, underscoring the critical role of riparian systems in ecosystem health. By leveraging high-resolution imagery to categorize protection status and land use, the study highlights the importance of integrating human-land interactions into conservation strategies for UNESCO sites like the MBBR.
Forest land-cover trends in the Monarch Butterfly Biosphere Reserve in Mexico, 1994–2017
Despite economic incentives to protect the Monarch Butterfly Biosphere Reserve, forest cover has not significantly recovered since 1994. A comparison of orthophotographs from 1994 and high-resolution satellite images from 2017 revealed only a 2% increase in forest area, while deforested areas expanded by 5% in the core zone. The study highlights that consensus among agrarian communities is crucial for effective conservation on socially owned lands. This research underscores the challenges of balancing economic incentives with environmental protection and community agreement.
Rapid assessment remote sensing of forest cover change to inform forest management: Case of the Monarch reserve
A rapid remote sensing approach demonstrates that forest cover loss in the Monarch Butterfly Biosphere Reserve (MBBR) has decreased while forest cover gains have increased, providing a baseline for monitoring and assessing the impacts of conservation interventions. This method, utilizing GIS analysis from 2006 to 2015, offers a non-invasive tool for tracking changes across four agrarian nuclei, facilitating collaboration with local managers and encouraging broader participation in conservation efforts. The study highlights the potential of remote sensing to support forest management and ecosystem resilience in human-natural systems.
What do monarchs feed on in winter? Nectar sources at hibernation sites
Monarch butterflies, despite long-held beliefs, actively feed on nectar during their overwintering period in Mexico’s Monarch Butterfly Biosphere Reserve. A systematic study identified 29 plant species—primarily white, yellow, or blue-flowered and winter-blooming—as key nectar sources, with Salvia mexicana and S. plurispicata being the most visited. Individual plants like Prunus serotina and Crataegus mexicana also attracted significant attention. These findings suggest that promoting such species in agricultural areas could support monarch conservation by mitigating reserve decline in disturbed forests.
Avocado Cover Expansion in the Monarch Butterfly Biosphere Reserve, Central Mexico
A total of 958 hectares within the Monarch Butterfly Biosphere Reserve (MBBR) are now covered by avocado plantations, with the southern zone hosting the largest area (570 ha) and the northern zone showing the highest expansion rate (422%) between 2006 and 2018. This study identified avocado orchards through photo interpretation, analyzing topographic attributes such as elevation, soil type, slope, and aspect. Most plantations have replaced traditional agricultural lands, but deforestation accounted for 40 hectares, particularly in the central zone. The expansion threatens the overwintering habitat of monarch butterflies, potentially impacting their migratory phenomenon.
Managing with logic: A Bayesian causal network assessment using the critical list of variables for sustaining the commons in the Monarch Reserve
A Bayesian causal network analysis of the Monarch Butterfly Biosphere Reserve reveals that small size and well-defined boundaries—both in resource systems and social groups—are critical to sustainable forest management success, even when full compliance with theoretical best practices is not achieved. The study used a combination of the critical list of variables for sustaining the commons and Bayesian causal networks (BCNs) to assess four successfully managed sites within the reserve. Despite threats from urban sprawl and climate change, all sites maintained forest cover loss below 0.03%, demonstrating that strict adherence to theoretical frameworks is unnecessary for effective conservation outcomes. This approach offers a scalable model for strategic interventions in common pool resource management.
Physical-mechanical behavior of fresh and completely altered rocks as an important factor of slope instability in the El Rosario Monarch Butterfly Sanctuary, Michoacán, Mexico
Slope instability in the El Rosario Monarch Butterfly Sanctuary, part of Mexico's Monarch Butterfly Biosphere Reserve, is primarily driven by rock alteration and steep terrain. Research reveals that altered rocks exhibit significantly higher porosity (60.9%) and permeability (393.71 mD), with drastically reduced uniaxial compressive strength (0.26 MPa) compared to fresh rocks (17.1% porosity, 0.262 mD permeability, 63.5 MPa). These degradation processes, combined with slopes exceeding 30 degrees and atypical rainfall events, act as critical triggers for slope failures in the region. The study employed laboratory tests to characterize physical-mechanical properties of lower Miocene andesitic lavas from Sierra de Angangueo, providing empirical evidence linking rock alteration to landslide susceptibility in this ecologically significant area.
Reciprocal Common Garden Altitudinal Transplants Reveal Potential Negative Impacts of Climate Change on Abies religiosa Populations in the Monarch Butterfly Biosphere Reserve Overwintering Sites
Climate change is projected to cause severe mortality in young Abies religiosa seedlings within the Monarch Butterfly Biosphere Reserve (MBBR), with a 400 m upward altitudinal shift appearing as a feasible management action. This study used reciprocal altitudinal transplants of A. religiosa seedlings across three contrasting altitudes (3400, 3000, and 2600 m a.s.l.) to assess the impacts of climatic mismatch on survival and growth. Findings indicated that transferring seedlings to warmer, drier sites resulted in approximately 45% mortality, whereas shifting to colder, wetter sites maintained near 95% survival. The study highlighted the critical role of seasonal dryness indices in determining seedling performance, with the rainy season index being crucial for survival and the cold-dry season index influencing aerial biomass growth.
Abies religiosa Seedling Limitations for Passive Restoration Practices at the Monarch Butterfly Biosphere Reserve in Mexico
Passive restoration of the sacred fir (Abies religiosa) forest within Mexico's Monarch Butterfly Biosphere Reserve is highly constrained by environmental factors, particularly soil moisture and moss thickness during dry, warm periods. Research found that seedling mortality reached 49.2% by the end of the dry season in June 2016, with the highest monthly mortality (14.3%) occurring in April—a critical period marked by low soil moisture and thin moss layers. While moss did not negatively impact seedling survival, it helped mitigate soil moisture loss during this vulnerable time. Seedling recruitment was also higher at intermediate elevations (3050–3300 m a.s.l.) compared to higher elevations, suggesting that climate change could further exacerbate these challenges. The study evaluated 53 sites along an elevational gradient in 2015 and tracked seedling mortality in 2016, revealing that natural regeneration alone is insufficient for effective restoration without targeted management interventions.
Modification of Fire Regimes Inferred from the Age Structure of Two Conifer Species in a Tropical Montane Forest, Mexico
Research in the Monarch Butterfly Biosphere Reserve reveals that fire regimes in tropical montane forests are characterized by frequent, low-severity, and low-intensity fires. This conclusion is drawn from the uneven-aged structure of stands dominated or co-dominated by smooth-bark Mexican pine (Pinus pseudostrobus) and sacred fir (Abies religiosa), which exhibit continuous tree establishment patterns across an altitudinal gradient. The study used increment cores collected from 25 mature trees at six altitudinal transects, ranging from 2400 to 3300 meters, with a total of 800 samples cross-dated to reconstruct tree establishment history. Findings suggest that while natural fire regimes may have been disrupted by human activities, limiting high-severity fires, these forests retain distinctive features shaped by their unique fire dynamics.
Policy Implementation Halts Deforestation in Winter Habitat of Monarch Butterflies in Mexico
A recent analysis reveals that deforestation due to logging in the core zones of Mexico's Monarch Butterfly Biosphere Reserve (MBBR) is no longer a significant factor in the decline of overwintering monarch butterfly populations. Despite dramatic population decreases, forest cover loss from logging has drastically reduced since 2011, coinciding with the implementation of strict conservation policies and economic incentives for local communities. The study attributes this success to collaborative efforts involving governmental agencies, NGOs, and academia, which have curbed illegal logging and increased social awareness. However, salvage logging from storms remains a concern, and broader threats such as habitat loss due to agricultural practices, disease, climate change, and pesticide use continue to endanger monarch populations.
Recent evidence of Mexican temperate forest decline and the need for ex situ conservation, assisted migration, and translocation of species ensembles as adaptive management to face projected climatic change impacts in a megadiverse country
Recent research highlights significant decline in Mexico's temperate forests, particularly along the Trans-Mexican Volcanic Belt and at lower elevations, attributed to climate change impacts. The study documents severe mistletoe infestations affecting Pinus hartwegii, reduced seedling recruitment of Abies religiosa, signs of inbreeding and defoliation in endangered Picea species, and increased pest and disease outbreaks in conifers and oaks. These findings challenge the assumption that natural genetic variation alone can sustain forest ecosystems under projected climate scenarios. The authors propose adaptive management strategies, including ex situ conservation, assisted migration, and translocation of species ensembles, to mitigate climate change impacts on Mexico's megadiverse temperate forests.
Dendrochronological reconstruction of fire history in coniferous forests in the Monarch Butterfly Biosphere Reserve, Mexico
Coniferous forests within the Monarch Butterfly Biosphere Reserve (MBBR) experience frequent fires, with return intervals averaging two years across all elevations and forest types. Contrary to expectations, these fires do not correlate with drought or El Niño Southern Oscillation (ENSO) events, nor do they influence tree establishment patterns, which remain continuous regardless of fire frequency. The study, using dendrochronological techniques on 110 cross-sections from 23 sites spanning 1925–2015, suggests that natural fire regimes in these forests may have been drastically altered by human activities. While frequent low-severity fires could potentially harm tree regeneration and the integrity of the monarch butterfly's overwintering habitat, continuous tree regeneration indicates such impacts have not yet materialized.
Ecological Restoration of Abies religiosa Forests Using Nurse Plants and Assisted Migration in the Monarch Butterfly Biosphere Reserve, Mexico
Assisted migration of Abies religiosa (sacred fir) combined with nurse plants significantly improves afforestation success in the Monarch Butterfly Biosphere Reserve, Mexico. Research found that seedlings planted under existing nurse plants exhibited survival rates of 72% and 94% at two sites, compared to just 18% and 10% in open areas without shade protection. The study also demonstrated that transferring tree populations 400 meters upward in elevation—an approach known as assisted migration—does not negatively impact seedling growth, potentially aligning them better with future climate conditions. These findings suggest that incorporating nurse shrubs like Baccharis conferta into reforestation strategies can enhance ecological restoration efforts, particularly in high-elevation regions vulnerable to climate change.
Recent Forest Cover Loss in the Core Zones of the Monarch Butterfly Biosphere Reserve in Mexico
A dramatic 98% reduction in large-scale illegal logging has occurred in the core zones of Mexico's Monarch Butterfly Biosphere Reserve (MBBR) between 2012 and 2018, according to a new study. Researchers analyzed aerial ortho-photographs and satellite images, validated with fieldwork, to quantify forest cover loss—totaling 163.44 hectares—with climate-related factors (rain and wind) accounting for the majority (125.44 ha), while illegal logging (both large-scale and small-scale) contributed significantly less (38.0 ha and 12.14 ha, respectively). The findings suggest that despite ongoing threats, forest loss in the monarch's winter habitat is not the primary driver of their population decline since 2010, which has been far more severe than expected.
Climatic Signal in Earlywood and Latewood in Conifer Forests in the Monarch Butterfly Biosphere Reserve, Mexico
Tree ring analysis reveals that the growth of conifer species Abies religiosa and Pinus pseudostrobus in Mexico's Monarch Butterfly Biosphere Reserve is highly sensitive to seasonal climate variations. Precipitation during late autumn (October-December) and spring (January-May) positively influences their growth, while higher mean maximum temperatures negatively impact it. Notably, A. religiosa shows greater sensitivity to temperature changes compared to P. pseudostrobus, with its earlywood and latewood growth positively correlated with monthly minimum temperatures. The study suggests that future warmer and drier climates could severely reduce the growth of A. religiosa, potentially threatening the overwintering habitat of the monarch butterfly (Danaus plexippus L.). This research underscores the vulnerability of these conifer forests to climate change, highlighting their ecological importance.
Flora of the core zones of the Monarch Butterfly Biosphere Reserve, Mexico: composition, geographical affinities and beta diversity
The core zones of the Monarch Butterfly Biosphere Reserve (MBBR) in Mexico harbor a rich and diverse flora, with 694 plant species identified across three core areas: Cerro Altamirano, Cerro Pelón, and Chincua-Campanario-Chivati. Notably, about 38% of these species are endemic to Mexico, underscoring the region's unique biodiversity. The study, conducted between 2000 and 2006, found that forests dominated by Quercus and Abies exhibited the highest species diversity, while herbaceous plants were the predominant growth form (ca. 75%). High beta diversity values (Jaccard index 0.03 to 0.11) indicated significant floristic variation among the core zones, with over half of the documented species (66.3%) found exclusively in one zone. These findings highlight the complementary nature of the core zones for plant conservation and emphasize their importance as critical habitats for migrating Monarch butterfly populations.
Land‐Use Change and Hillslope Instability in the Monarch Butterfly Biosphere Reserve, Central Mexico
A significant landsliding episode in February 2010 within the Monarch Butterfly Biosphere Reserve (MBBR) in Mexico revealed that deforestation played a critical role in hillslope instability, leading to debris flows that caused 16 deaths and substantial damage. The study analyzed land-use changes over four decades (1971–2010), finding that while deforestation rates remained relatively low compared to other regions of Mexico, the 2010 landslides destroyed or degraded approximately 54.57 hectares of forest. This suggests that payments for environmental services may mitigate human-induced deforestation but highlights the need for disaster risk management in fragile ecosystems. The research combined digital photo interpretation and field observations to assess land-cover changes and their relationship with landsliding.
Deforestation and forest degradation in the Monarch Butterfly Biosphere Reserve, Mexico, 2003–2009
Between 2003 and 2009, the Monarch Butterfly Biosphere Reserve in Mexico experienced significant forest degradation and deforestation, with 2152 hectares affected, primarily due to illegal logging by organized gangs. These changes were concentrated in four specific areas outside the Payment for Environmental Services (PES) program and zones of land conflicts. Notably, degradation decreased where logging declined, particularly on properties included in the PES program or where exploitation permits had expired. The study used digital aerial photographs and satellite images to analyze biennial changes, revealing a trend of decreasing disturbances by 2011, attributed to the PES program, promotion of productive activities, and social work in the area.
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